first to commit project

6 years ago · 6ad265fc0c
78 changed files with 6171 additions and 0 deletions
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@ -0,0 +1,7 @@
+[bumpversion]
+commit = True
+tag = True
+current_version = 0.7.0
+
+[bumpversion:file:cos.go]
+
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,29 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+dist/
+cover.html
+cover.out
+covprofile
+coverage.html
--- a/.travis.yml
+++ b/.travis.yml
@ -0,0 +1,27 @@
+language: go
+go:
+  - 1.6
+  - 1.7
+  - 1.8
+  - 1.9
+  - master
+
+sudo: false
+
+before_install:
+  - go get github.com/mattn/goveralls
+
+install:
+  - go get
+  - go build
+
+script:
+  - make test
+  - go test -coverprofile=cover.out github.com/tencentyun/cos-go-sdk-v5
+  - $HOME/gopath/bin/goveralls -service=travis-ci -coverprofile=cover.out
+
+matrix:
+  allow_failures:
+    - go: 1.6
+    - go: 1.7
+    - go: master
--- a/21
+++ b/21
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 mozillazg
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/20
+++ b/20
@ -0,0 +1,20 @@
+help:
+	@echo "test             run test"
+	@echo "lint             run lint"
+	@echo "example          run examples"
+
+.PHONY: test
+test:
+	go test -v -cover -coverprofile cover.out
+	go tool cover -html=cover.out -o cover.html
+
+.PHONY: lint
+lint:
+	gofmt -s -w .
+	goimports -w .
+	golint .
+	go vet
+
+.PHONY: example
+example:
+	cd examples && sh test.sh
--- a/README.md
+++ b/README.md
@ -0,0 +1,96 @@
+# cos-go-sdk-v5
+
+腾讯云对象存储服务 COS(Cloud Object Storage) Go SDK（API 版本：V5 版本的 XML API）。
+
+## Install
+
+`go get -u github.com/tencentyun/cos-go-sdk-v5`
+
+
+## Usage
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"time"
+	
+	"github.com/tencentyun/cos-go-sdk-v5"
+)
+
+func main() {
+	//将<bucket>和<region>修改为真实的信息
+	//bucket的命名规则为{name}-{appid} ，此处填写的存储桶名称必须为此格式
+	u, _ := url.Parse("https://<bucket>.cos.<region>.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		//设置超时时间
+		Timeout: 100 * time.Second,
+		Transport: &cos.AuthorizationTransport{
+			//如实填写账号和密钥，也可以设置为环境变量
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+		},
+	})
+
+	name := "test/hello.txt"
+	resp, err := c.Object.Get(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	bs, _ := ioutil.ReadAll(resp.Body)
+	resp.Body.Close()
+	fmt.Printf("%s\n", string(bs))
+}
+```
+
+所有的 API 在 [example](./example/) 目录下都有对应的使用示例。
+
+Service API:
+
+* [x] Get Service（使用示例：[service/get.go](./example/service/get.go)）
+
+Bucket API:
+
+* [x] Get Bucket（使用示例：[bucket/get.go](./example/bucket/get.go)）
+* [x] Get Bucket ACL（使用示例：[bucket/getACL.go](./example/bucket/getACL.go)）
+* [x] Get Bucket CORS（使用示例：[bucket/getCORS.go](./example/bucket/getCORS.go)）
+* [x] Get Bucket Location（使用示例：[bucket/getLocation.go](./example/bucket/getLocation.go)）
+* [x] Get Buket Lifecycle（使用示例：[bucket/getLifecycle.go](./example/bucket/getLifecycle.go)）
+* [x] Get Bucket Tagging（使用示例：[bucket/getTagging.go](./example/bucket/getTagging.go)）
+* [x] Put Bucket（使用示例：[bucket/put.go](./example/bucket/put.go)）
+* [x] Put Bucket ACL（使用示例：[bucket/putACL.go](./example/bucket/putACL.go)）
+* [x] Put Bucket CORS（使用示例：[bucket/putCORS.go](./example/bucket/putCORS.go)）
+* [x] Put Bucket Lifecycle（使用示例：[bucket/putLifecycle.go](./example/bucket/putLifecycle.go)）
+* [x] Put Bucket Tagging（使用示例：[bucket/putTagging.go](./example/bucket/putTagging.go)）
+* [x] Delete Bucket（使用示例：[bucket/delete.go](./example/bucket/delete.go)）
+* [x] Delete Bucket CORS（使用示例：[bucket/deleteCORS.go](./example/bucket/deleteCORS.go)）
+* [x] Delete Bucket Lifecycle（使用示例：[bucket/deleteLifecycle.go](./example/bucket/deleteLifecycle.go)）
+* [x] Delete Bucket Tagging（使用示例：[bucket/deleteTagging.go](./example/bucket/deleteTagging.go)）
+* [x] Head Bucket（使用示例：[bucket/head.go](./example/bucket/head.go)）
+* [x] List Multipart Uploads（使用示例：[bucket/listMultipartUploads.go](./example/bucket/listMultipartUploads.go)）
+
+Object API:
+
+* [x] Append Object（使用示例：[object/append.go](./example/object/append.go)）
+* [x] Get Object（使用示例：[object/get.go](./example/object/get.go)）
+* [x] Get Object ACL（使用示例：[object/getACL.go](./example/object/getACL.go)）
+* [x] Put Object（使用示例：[object/put.go](./example/object/put.go)）
+* [x] Put Object ACL（使用示例：[object/putACL.go](./example/object/putACL.go)）
+* [x] Put Object Copy（使用示例：[object/copy.go](./example/object/copy.go)）
+* [x] Delete Object（使用示例：[object/delete.go](./example/object/delete.go)）
+* [x] Delete Multiple Object（使用示例：[object/deleteMultiple.go](./example/object/deleteMultiple.go)）
+* [x] Head Object（使用示例：[object/head.go](./example/object/head.go)）
+* [x] Options Object（使用示例：[object/options.go](./example/object/options.go)）
+* [x] Initiate Multipart Upload（使用示例：[object/initiateMultipartUpload.go](./example/object/initiateMultipartUpload.go)）
+* [x] Upload Part（使用示例：[object/uploadPart.go](./example/object/uploadPart.go)）
+* [x] List Parts（使用示例：[object/listParts.go](./example/object/listParts.go)）
+* [x] Complete Multipart Upload（使用示例：[object/completeMultipartUpload.go](./example/object/completeMultipartUpload.go)）
+* [x] Abort Multipart Upload（使用示例：[object/abortMultipartUpload.go](./example/object/abortMultipartUpload.go)）
+* [x] Mutipart Upload（使用示例：[object/MutiUpload.go](./example/object/MutiUpload.go)）
--- a/auth.go
+++ b/auth.go
@ -0,0 +1,264 @@
+package cos
+
+import (
+	"crypto/hmac"
+	"crypto/sha1"
+	"fmt"
+	"hash"
+	"net/http"
+	"net/url"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+)
+
+const sha1SignAlgorithm = "sha1"
+const privateHeaderPrefix = "x-cos-"
+const defaultAuthExpire = time.Hour
+
+// 需要校验的 Headers 列表
+var needSignHeaders = map[string]bool{
+	"host":                           true,
+	"range":                          true,
+	"x-cos-acl":                      true,
+	"x-cos-grant-read":               true,
+	"x-cos-grant-write":              true,
+	"x-cos-grant-full-control":       true,
+	"response-content-type":          true,
+	"response-content-language":      true,
+	"response-expires":               true,
+	"response-cache-control":         true,
+	"response-content-disposition":   true,
+	"response-content-encoding":      true,
+	"cache-control":                  true,
+	"content-disposition":            true,
+	"content-encoding":               true,
+	"content-type":                   true,
+	"content-length":                 true,
+	"content-md5":                    true,
+	"expect":                         true,
+	"expires":                        true,
+	"x-cos-content-sha1":             true,
+	"x-cos-storage-class":            true,
+	"if-modified-since":              true,
+	"origin":                         true,
+	"access-control-request-method":  true,
+	"access-control-request-headers": true,
+	"x-cos-object-type":              true,
+}
+
+// AuthTime 用于生成签名所需的 q-sign-time 和 q-key-time 相关参数
+type AuthTime struct {
+	SignStartTime time.Time
+	SignEndTime   time.Time
+	KeyStartTime  time.Time
+	KeyEndTime    time.Time
+}
+
+// NewAuthTime 生成 AuthTime 的便捷函数
+//
+//   expire: 从现在开始多久过期.
+func NewAuthTime(expire time.Duration) *AuthTime {
+	signStartTime := time.Now()
+	keyStartTime := signStartTime
+	signEndTime := signStartTime.Add(expire)
+	keyEndTime := signEndTime
+	return &AuthTime{
+		SignStartTime: signStartTime,
+		SignEndTime:   signEndTime,
+		KeyStartTime:  keyStartTime,
+		KeyEndTime:    keyEndTime,
+	}
+}
+
+// signString return q-sign-time string
+func (a *AuthTime) signString() string {
+	return fmt.Sprintf("%d;%d", a.SignStartTime.Unix(), a.SignEndTime.Unix())
+}
+
+// keyString return q-key-time string
+func (a *AuthTime) keyString() string {
+	return fmt.Sprintf("%d;%d", a.KeyStartTime.Unix(), a.KeyEndTime.Unix())
+}
+
+// newAuthorization 通过一系列步骤生成最终需要的 Authorization 字符串
+func newAuthorization(secretID, secretKey string, req *http.Request, authTime *AuthTime) string {
+	signTime := authTime.signString()
+	keyTime := authTime.keyString()
+	signKey := calSignKey(secretKey, keyTime)
+
+	formatHeaders := *new(string)
+	signedHeaderList := *new([]string)
+	formatHeaders, signedHeaderList = genFormatHeaders(req.Header)
+	formatParameters, signedParameterList := genFormatParameters(req.URL.Query())
+	formatString := genFormatString(req.Method, *req.URL, formatParameters, formatHeaders)
+
+	stringToSign := calStringToSign(sha1SignAlgorithm, keyTime, formatString)
+	signature := calSignature(signKey, stringToSign)
+
+	return genAuthorization(
+		secretID, signTime, keyTime, signature, signedHeaderList,
+		signedParameterList,
+	)
+}
+
+// AddAuthorizationHeader 给 req 增加签名信息
+func AddAuthorizationHeader(secretID, secretKey string, sessionToken string, req *http.Request, authTime *AuthTime) {
+	auth := newAuthorization(secretID, secretKey, req,
+		authTime,
+	)
+	if len(sessionToken) > 0 {
+		req.Header.Set("x-cos-security-token", sessionToken)
+	}
+	req.Header.Set("Authorization", auth)
+}
+
+// calSignKey 计算 SignKey
+func calSignKey(secretKey, keyTime string) string {
+	digest := calHMACDigest(secretKey, keyTime, sha1SignAlgorithm)
+	return fmt.Sprintf("%x", digest)
+}
+
+// calStringToSign 计算 StringToSign
+func calStringToSign(signAlgorithm, signTime, formatString string) string {
+	h := sha1.New()
+	h.Write([]byte(formatString))
+	return fmt.Sprintf("%s\n%s\n%x\n", signAlgorithm, signTime, h.Sum(nil))
+}
+
+// calSignature 计算 Signature
+func calSignature(signKey, stringToSign string) string {
+	digest := calHMACDigest(signKey, stringToSign, sha1SignAlgorithm)
+	return fmt.Sprintf("%x", digest)
+}
+
+// genAuthorization 生成 Authorization
+func genAuthorization(secretID, signTime, keyTime, signature string, signedHeaderList, signedParameterList []string) string {
+	return strings.Join([]string{
+		"q-sign-algorithm=" + sha1SignAlgorithm,
+		"q-ak=" + secretID,
+		"q-sign-time=" + signTime,
+		"q-key-time=" + keyTime,
+		"q-header-list=" + strings.Join(signedHeaderList, ";"),
+		"q-url-param-list=" + strings.Join(signedParameterList, ";"),
+		"q-signature=" + signature,
+	}, "&")
+}
+
+// genFormatString 生成 FormatString
+func genFormatString(method string, uri url.URL, formatParameters, formatHeaders string) string {
+	formatMethod := strings.ToLower(method)
+	formatURI := uri.Path
+
+	return fmt.Sprintf("%s\n%s\n%s\n%s\n", formatMethod, formatURI,
+		formatParameters, formatHeaders,
+	)
+}
+
+// genFormatParameters 生成 FormatParameters 和 SignedParameterList
+func genFormatParameters(parameters url.Values) (formatParameters string, signedParameterList []string) {
+	ps := url.Values{}
+	for key, values := range parameters {
+		for _, value := range values {
+			key = strings.ToLower(key)
+			ps.Add(key, value)
+			signedParameterList = append(signedParameterList, key)
+		}
+	}
+	//formatParameters = strings.ToLower(ps.Encode())
+	formatParameters = ps.Encode()
+	sort.Strings(signedParameterList)
+	return
+}
+
+// genFormatHeaders 生成 FormatHeaders 和 SignedHeaderList
+func genFormatHeaders(headers http.Header) (formatHeaders string, signedHeaderList []string) {
+	hs := url.Values{}
+	for key, values := range headers {
+		for _, value := range values {
+			key = strings.ToLower(key)
+			if isSignHeader(key) {
+				hs.Add(key, value)
+				signedHeaderList = append(signedHeaderList, key)
+			}
+		}
+	}
+	formatHeaders = hs.Encode()
+	sort.Strings(signedHeaderList)
+	return
+}
+
+// HMAC 签名
+func calHMACDigest(key, msg, signMethod string) []byte {
+	var hashFunc func() hash.Hash
+	switch signMethod {
+	case "sha1":
+		hashFunc = sha1.New
+	default:
+		hashFunc = sha1.New
+	}
+	h := hmac.New(hashFunc, []byte(key))
+	h.Write([]byte(msg))
+	return h.Sum(nil)
+}
+
+func isSignHeader(key string) bool {
+	for k, v := range needSignHeaders {
+		if key == k && v {
+			return true
+		}
+	}
+	return strings.HasPrefix(key, privateHeaderPrefix)
+}
+
+// AuthorizationTransport 给请求增加 Authorization header
+type AuthorizationTransport struct {
+	SecretID     string
+	SecretKey    string
+	SessionToken string
+	rwLocker     sync.RWMutex
+	// 签名多久过期
+	Expire time.Duration
+
+	Transport http.RoundTripper
+}
+
+// SetCredential update the SecretID(ak), SercretKey(sk), sessiontoken
+func (t *AuthorizationTransport) SetCredential(ak, sk, token string) {
+	t.rwLocker.Lock()
+	defer t.rwLocker.Unlock()
+	t.SecretID = ak
+	t.SecretKey = sk
+	t.SessionToken = token
+}
+
+// GetCredential get the ak, sk, token
+func (t *AuthorizationTransport) GetCredential() (string, string, string) {
+	t.rwLocker.RLock()
+	defer t.rwLocker.RUnlock()
+	return t.SecretID, t.SecretKey, t.SessionToken
+}
+
+// RoundTrip implements the RoundTripper interface.
+func (t *AuthorizationTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	req = cloneRequest(req) // per RoundTrip contract
+	if t.Expire == time.Duration(0) {
+		t.Expire = defaultAuthExpire
+	}
+
+	ak, sk, token := t.GetCredential()
+	// 增加 Authorization header
+	authTime := NewAuthTime(t.Expire)
+	AddAuthorizationHeader(ak, sk, token, req, authTime)
+
+	resp, err := t.transport().RoundTrip(req)
+	return resp, err
+}
+
+func (t *AuthorizationTransport) transport() http.RoundTripper {
+	if t.Transport != nil {
+		return t.Transport
+	}
+	return http.DefaultTransport
+}
--- a/auth_test.go
+++ b/auth_test.go
@ -0,0 +1,51 @@
+package cos
+
+import (
+	"context"
+	"net/http"
+	"testing"
+	"time"
+)
+
+func TestNewAuthorization(t *testing.T) {
+	expectAuthorization := `q-sign-algorithm=sha1&q-ak=QmFzZTY0IGlzIGEgZ2VuZXJp&q-sign-time=1480932292;1481012292&q-key-time=1480932292;1481012292&q-header-list=host;x-cos-content-sha1;x-cos-stroage-class&q-url-param-list=&q-signature=ce4ac0ecbcdb30538b3fee0a97cc6389694ce53a`
+	secretID := "QmFzZTY0IGlzIGEgZ2VuZXJp"
+	secretKey := "AKIDZfbOA78asKUYBcXFrJD0a1ICvR98JM"
+	host := "testbucket-125000000.cos.ap-guangzhou.myqcloud.com"
+	uri := "http://testbucket-125000000.cos.ap-guangzhou.myqcloud.com/testfile2"
+	startTime := time.Unix(int64(1480932292), 0)
+	endTime := time.Unix(int64(1481012292), 0)
+
+	req, _ := http.NewRequest("PUT", uri, nil)
+	req.Header.Add("Host", host)
+	req.Header.Add("x-cos-content-sha1", "db8ac1c259eb89d4a131b253bacfca5f319d54f2")
+	req.Header.Add("x-cos-stroage-class", "nearline")
+
+	authTime := &AuthTime{
+		SignStartTime: startTime,
+		SignEndTime:   endTime,
+		KeyStartTime:  startTime,
+		KeyEndTime:    endTime,
+	}
+	auth := newAuthorization(secretID, secretKey, req, authTime)
+
+	if auth != expectAuthorization {
+		t.Errorf("NewAuthorization returned \n%#v, want \n%#v", auth, expectAuthorization)
+	}
+}
+
+func TestAuthorizationTransport(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		auth := r.Header.Get("Authorization")
+		if auth == "" {
+			t.Error("AuthorizationTransport didn't add Authorization header")
+		}
+	})
+
+	client.client.Transport = &AuthorizationTransport{}
+	req, _ := http.NewRequest("GET", client.BaseURL.BucketURL.String(), nil)
+	client.doAPI(context.Background(), req, nil, true)
+}
--- a/bucket.go
+++ b/bucket.go
@ -0,0 +1,106 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+
+// BucketService ...
+//
+// Bucket 相关 API
+type BucketService service
+
+// BucketGetResult ...
+type BucketGetResult struct {
+	XMLName        xml.Name `xml:"ListBucketResult"`
+	Name           string
+	Prefix         string `xml:"Prefix,omitempty"`
+	Marker         string `xml:"Marker,omitempty"`
+	NextMarker     string `xml:"NextMarker,omitempty"`
+	Delimiter      string `xml:"Delimiter,omitempty"`
+	MaxKeys        int
+	IsTruncated    bool
+	Contents       []Object `xml:"Contents,omitempty"`
+	CommonPrefixes []string `xml:"CommonPrefixes>Prefix,omitempty"`
+	EncodingType   string   `xml:"Encoding-Type,omitempty"`
+}
+
+// BucketGetOptions ...
+type BucketGetOptions struct {
+	Prefix       string `url:"prefix,omitempty"`
+	Delimiter    string `url:"delimiter,omitempty"`
+	EncodingType string `url:"encoding-type,omitempty"`
+	Marker       string `url:"marker,omitempty"`
+	MaxKeys      int    `url:"max-keys,omitempty"`
+}
+
+// Get Bucket请求等同于 List Object请求，可以列出该Bucket下部分或者所有Object，发起该请求需要拥有Read权限。
+//
+// https://www.qcloud.com/document/product/436/7734
+func (s *BucketService) Get(ctx context.Context, opt *BucketGetOptions) (*BucketGetResult, *Response, error) {
+	var res BucketGetResult
+	sendOpt := sendOptions{
+		baseURL:  s.client.BaseURL.BucketURL,
+		uri:      "/",
+		method:   http.MethodGet,
+		optQuery: opt,
+		result:   &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// BucketPutOptions ...
+type BucketPutOptions ACLHeaderOptions
+
+// Put Bucket请求可以在指定账号下创建一个Bucket。
+//
+// https://www.qcloud.com/document/product/436/7738
+func (s *BucketService) Put(ctx context.Context, opt *BucketPutOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/",
+		method:    http.MethodPut,
+		optHeader: opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// Delete Bucket请求可以在指定账号下删除Bucket，删除之前要求Bucket为空。
+//
+// https://www.qcloud.com/document/product/436/7732
+func (s *BucketService) Delete(ctx context.Context) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/",
+		method:  http.MethodDelete,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// Head Bucket请求可以确认是否存在该Bucket，是否有权限访问，Head的权限与Read一致。
+//
+//   当其存在时，返回 HTTP 状态码200；
+//   当无权限时，返回 HTTP 状态码403；
+//   当不存在时，返回 HTTP 状态码404。
+//
+// https://www.qcloud.com/document/product/436/7735
+func (s *BucketService) Head(ctx context.Context) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/",
+		method:  http.MethodHead,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// Bucket ...
+type Bucket struct {
+	Name       string
+	Region     string `xml:"Location,omitempty"`
+	CreationDate string `xml:",omitempty"`
+}
--- a/bucket_acl.go
+++ b/bucket_acl.go
@ -0,0 +1,62 @@
+package cos
+
+import (
+	"context"
+	"net/http"
+)
+
+// BucketGetACLResult ...
+type BucketGetACLResult ACLXml
+
+// GetACL 使用API读取Bucket的ACL表，只有所有者有权操作。
+//
+// https://www.qcloud.com/document/product/436/7733
+func (s *BucketService) GetACL(ctx context.Context) (*BucketGetACLResult, *Response, error) {
+	var res BucketGetACLResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?acl",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// BucketPutACLOptions ...
+type BucketPutACLOptions struct {
+	Header *ACLHeaderOptions `url:"-" xml:"-"`
+	Body   *ACLXml           `url:"-" header:"-"`
+}
+
+// PutACL 使用API写入Bucket的ACL表，您可以通过Header："x-cos-acl","x-cos-grant-read",
+// "x-cos-grant-write","x-cos-grant-full-control"传入ACL信息，也可以通过body以XML格式传入ACL信息，
+//
+// 但是只能选择Header和Body其中一种，否则返回冲突。
+//
+// Put Bucket ACL是一个覆盖操作，传入新的ACL将覆盖原有ACL。只有所有者有权操作。
+//
+//   "x-cos-acl"：枚举值为public-read，private；public-read意味这个Bucket有公有读私有写的权限，
+//   private意味这个Bucket有私有读写的权限。
+//
+//   "x-cos-grant-read"：意味被赋予权限的用户拥有该Bucket的读权限
+//   "x-cos-grant-write"：意味被赋予权限的用户拥有该Bucket的写权限
+//   "x-cos-grant-full-control"：意味被赋予权限的用户拥有该Bucket的读写权限
+//
+// https://www.qcloud.com/document/product/436/7737
+func (s *BucketService) PutACL(ctx context.Context, opt *BucketPutACLOptions) (*Response, error) {
+	header := opt.Header
+	body := opt.Body
+	if body != nil {
+		header = nil
+	}
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/?acl",
+		method:    http.MethodPut,
+		body:      body,
+		optHeader: header,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
--- a/bucket_acl_test.go
+++ b/bucket_acl_test.go
@ -0,0 +1,172 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_GetACL(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		vs := values{
+			"acl": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<AccessControlPolicy>
+	<Owner>
+		<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+		<DisplayName>qcs::cam::uin/100000760461:uin/100000760461</DisplayName>
+	</Owner>
+	<AccessControlList>
+		<Grant>
+			<Grantee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="RootAccount">
+				<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+				<DisplayName>qcs::cam::uin/100000760461:uin/100000760461</DisplayName>
+			</Grantee>
+			<Permission>FULL_CONTROL</Permission>
+		</Grant>
+		<Grant>
+			<Grantee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="RootAccount">
+				<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+				<DisplayName>qcs::cam::uin/100000760461:uin/100000760461</DisplayName>
+			</Grantee>
+			<Permission>READ</Permission>
+		</Grant>
+	</AccessControlList>
+</AccessControlPolicy>`)
+	})
+
+	ref, _, err := client.Bucket.GetACL(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.GetACL returned error: %v", err)
+	}
+
+	want := &BucketGetACLResult{
+		XMLName: xml.Name{Local: "AccessControlPolicy"},
+		Owner: &Owner{
+			ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+			DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+		},
+		AccessControlList: []ACLGrant{
+			{
+				Grantee: &ACLGrantee{
+					Type:        "RootAccount",
+					ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+					DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+				},
+				Permission: "FULL_CONTROL",
+			},
+			{
+				Grantee: &ACLGrantee{
+					Type:        "RootAccount",
+					ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+					DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+				},
+				Permission: "READ",
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.GetACL returned %+v, want %+v", ref, want)
+	}
+
+}
+
+func TestBucketService_PutACL_with_header_opt(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketPutACLOptions{
+		Header: &ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"acl": "",
+		}
+		testFormValues(t, r, vs)
+		testHeader(t, r, "x-cos-acl", "private")
+
+		want := 0
+		v, _ := r.Body.Read([]byte{})
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Bucket.PutACL request body: %#v, want %#v", v, want)
+		}
+	})
+
+	_, err := client.Bucket.PutACL(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.PutACL returned error: %v", err)
+	}
+
+}
+
+func TestBucketService_PutACL_with_body_opt(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketPutACLOptions{
+		Body: &ACLXml{
+			Owner: &Owner{
+				ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+				DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+			},
+			AccessControlList: []ACLGrant{
+				{
+					Grantee: &ACLGrantee{
+						Type:        "RootAccount",
+						ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+						DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+					},
+
+					Permission: "FULL_CONTROL",
+				},
+				{
+					Grantee: &ACLGrantee{
+						Type:        "RootAccount",
+						ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+						DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+					},
+					Permission: "READ",
+				},
+			},
+		},
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		v := new(ACLXml)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"acl": "",
+		}
+		testFormValues(t, r, vs)
+		testHeader(t, r, "x-cos-acl", "")
+
+		want := opt.Body
+		want.XMLName = xml.Name{Local: "AccessControlPolicy"}
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Bucket.PutACL request body: %+v, want %+v", v, want)
+		}
+
+	})
+
+	_, err := client.Bucket.PutACL(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.PutACL returned error: %v", err)
+	}
+
+}
--- a/bucket_cors.go
+++ b/bucket_cors.go
@ -0,0 +1,77 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+
+// BucketCORSRule ...
+type BucketCORSRule struct {
+	ID             string   `xml:"ID,omitempty"`
+	AllowedMethods []string `xml:"AllowedMethod"`
+	AllowedOrigins []string `xml:"AllowedOrigin"`
+	AllowedHeaders []string `xml:"AllowedHeader,omitempty"`
+	MaxAgeSeconds  int      `xml:"MaxAgeSeconds,omitempty"`
+	ExposeHeaders  []string `xml:"ExposeHeader,omitempty"`
+}
+
+// BucketGetCORSResult ...
+type BucketGetCORSResult struct {
+	XMLName xml.Name         `xml:"CORSConfiguration"`
+	Rules   []BucketCORSRule `xml:"CORSRule,omitempty"`
+}
+
+// GetCORS ...
+//
+// Get Bucket CORS实现跨域访问配置读取。
+//
+// https://www.qcloud.com/document/product/436/8274
+func (s *BucketService) GetCORS(ctx context.Context) (*BucketGetCORSResult, *Response, error) {
+	var res BucketGetCORSResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?cors",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// BucketPutCORSOptions ...
+type BucketPutCORSOptions struct {
+	XMLName xml.Name         `xml:"CORSConfiguration"`
+	Rules   []BucketCORSRule `xml:"CORSRule,omitempty"`
+}
+
+// PutCORS ...
+//
+// Put Bucket CORS实现跨域访问设置，您可以通过传入XML格式的配置文件实现配置，文件大小限制为64 KB。
+//
+// https://www.qcloud.com/document/product/436/8279
+func (s *BucketService) PutCORS(ctx context.Context, opt *BucketPutCORSOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?cors",
+		method:  http.MethodPut,
+		body:    opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// DeleteCORS ...
+//
+// Delete Bucket CORS实现跨域访问配置删除。
+//
+// https://www.qcloud.com/document/product/436/8283
+func (s *BucketService) DeleteCORS(ctx context.Context) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?cors",
+		method:  http.MethodDelete,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
--- a/bucket_cors_test.go
+++ b/bucket_cors_test.go
@ -0,0 +1,138 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_GetCORS(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodGet)
+		vs := values{
+			"cors": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<?xml version='1.0' encoding='utf-8' ?>
+<CORSConfiguration>
+	<CORSRule>
+		<AllowedOrigin>http://www.qq.com</AllowedOrigin>
+		<AllowedMethod>PUT</AllowedMethod>
+		<AllowedMethod>GET</AllowedMethod>
+		<AllowedHeader>x-cos-meta-test</AllowedHeader>
+		<AllowedHeader>x-cos-xx</AllowedHeader>
+		<ExposeHeader>x-cos-meta-test1</ExposeHeader>
+		<MaxAgeSeconds>500</MaxAgeSeconds>
+	</CORSRule>
+	<CORSRule>
+		<ID>1234</ID>
+		<AllowedOrigin>http://www.baidu.com</AllowedOrigin>
+		<AllowedOrigin>twitter.com</AllowedOrigin>
+		<AllowedMethod>PUT</AllowedMethod>
+		<AllowedMethod>GET</AllowedMethod>
+		<MaxAgeSeconds>500</MaxAgeSeconds>
+	</CORSRule>
+</CORSConfiguration>`)
+	})
+
+	ref, _, err := client.Bucket.GetCORS(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.GetCORS returned error: %v", err)
+	}
+
+	want := &BucketGetCORSResult{
+		XMLName: xml.Name{Local: "CORSConfiguration"},
+		Rules: []BucketCORSRule{
+			{
+				AllowedOrigins: []string{"http://www.qq.com"},
+				AllowedMethods: []string{"PUT", "GET"},
+				AllowedHeaders: []string{"x-cos-meta-test", "x-cos-xx"},
+				MaxAgeSeconds:  500,
+				ExposeHeaders:  []string{"x-cos-meta-test1"},
+			},
+			{
+				ID:             "1234",
+				AllowedOrigins: []string{"http://www.baidu.com", "twitter.com"},
+				AllowedMethods: []string{"PUT", "GET"},
+				MaxAgeSeconds:  500,
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.GetLifecycle returned %+v, want %+v", ref, want)
+	}
+}
+
+func TestBucketService_PutCORS(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketPutCORSOptions{
+		Rules: []BucketCORSRule{
+			{
+				AllowedOrigins: []string{"http://www.qq.com"},
+				AllowedMethods: []string{"PUT", "GET"},
+				AllowedHeaders: []string{"x-cos-meta-test", "x-cos-xx"},
+				MaxAgeSeconds:  500,
+				ExposeHeaders:  []string{"x-cos-meta-test1"},
+			},
+			{
+				ID:             "1234",
+				AllowedOrigins: []string{"http://www.baidu.com", "twitter.com"},
+				AllowedMethods: []string{"PUT", "GET"},
+				MaxAgeSeconds:  500,
+			},
+		},
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		v := new(BucketPutCORSOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"cors": "",
+		}
+		testFormValues(t, r, vs)
+
+		want := opt
+		want.XMLName = xml.Name{Local: "CORSConfiguration"}
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Bucket.PutCORS request body: %+v, want %+v", v, want)
+		}
+
+	})
+
+	_, err := client.Bucket.PutCORS(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.PutCORS returned error: %v", err)
+	}
+
+}
+
+func TestBucketService_DeleteCORS(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodDelete)
+		vs := values{
+			"cors": "",
+		}
+		testFormValues(t, r, vs)
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Bucket.DeleteCORS(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.DeleteCORS returned error: %v", err)
+	}
+
+}
--- a/bucket_lifecycle.go
+++ b/bucket_lifecycle.go
@ -0,0 +1,107 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+// BucketLifecycleFilter ...
+type BucketLifecycleFilter struct {
+	Prefix       string `xml:"Prefix,omitempty"`
+}
+
+// BucketLifecycleExpiration ...
+type BucketLifecycleExpiration struct {
+	Date string `xml:"Date,omitempty"`
+	Days int    `xml:"Days,omitempty"`
+}
+
+// BucketLifecycleTransition ...
+type BucketLifecycleTransition struct {
+	Date         string `xml:"Date,omitempty"`
+	Days         int    `xml:"Days,omitempty"`
+	StorageClass string
+}
+
+// BucketLifecycleAbortIncompleteMultipartUpload ...
+type BucketLifecycleAbortIncompleteMultipartUpload struct {
+	DaysAfterInitiation string `xml:"DaysAfterInititation,omitempty"`
+}
+
+// BucketLifecycleRule ...
+type BucketLifecycleRule struct {
+	ID                             string `xml:"ID,omitempty"`
+	Status                         string
+	Filter                         *BucketLifecycleFilter                     	  `xml:"Filter,omitempty"`
+	Transition                     *BucketLifecycleTransition                     `xml:"Transition,omitempty"`
+	Expiration                     *BucketLifecycleExpiration                     `xml:"Expiration,omitempty"`
+	AbortIncompleteMultipartUpload *BucketLifecycleAbortIncompleteMultipartUpload `xml:"AbortIncompleteMultipartUpload,omitempty"`
+}
+
+// BucketGetLifecycleResult ...
+type BucketGetLifecycleResult struct {
+	XMLName xml.Name              `xml:"LifecycleConfiguration"`
+	Rules   []BucketLifecycleRule `xml:"Rule,omitempty"`
+}
+
+// GetLifecycle ...
+//
+// Get Bucket Lifecycle请求实现读取生命周期管理的配置。当配置不存在时，返回404 Not Found。
+//
+// （目前只支持华南园区）
+//
+// https://www.qcloud.com/document/product/436/8278
+func (s *BucketService) GetLifecycle(ctx context.Context) (*BucketGetLifecycleResult, *Response, error) {
+	var res BucketGetLifecycleResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?lifecycle",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// BucketPutLifecycleOptions ...
+type BucketPutLifecycleOptions struct {
+	XMLName xml.Name              `xml:"LifecycleConfiguration"`
+	Rules   []BucketLifecycleRule `xml:"Rule,omitempty"`
+}
+
+// PutLifecycle ...
+//
+// Put Bucket Lifecycle请求实现设置生命周期管理的功能。您可以通过该请求实现数据的生命周期管理配置和定期删除。
+//
+// 此请求为覆盖操作，上传新的配置文件将覆盖之前的配置文件。生命周期管理对文件和文件夹同时生效。
+//
+// （目前只支持华南园区）
+//
+// https://www.qcloud.com/document/product/436/8280
+func (s *BucketService) PutLifecycle(ctx context.Context, opt *BucketPutLifecycleOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?lifecycle",
+		method:  http.MethodPut,
+		body:    opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// DeleteLifecycle ...
+//
+// Delete Bucket Lifecycle请求实现删除生命周期管理。
+//
+// （目前只支持华南园区）
+//
+// https://www.qcloud.com/document/product/436/8284
+func (s *BucketService) DeleteLifecycle(ctx context.Context) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?lifecycle",
+		method:  http.MethodDelete,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
--- a/bucket_lifecycle_test.go
+++ b/bucket_lifecycle_test.go
@ -0,0 +1,140 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_GetLifecycle(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodGet)
+		vs := values{
+			"lifecycle": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<LifecycleConfiguration>
+	<Rule>
+		<ID>1234</ID>
+		<Filter>
+			<Prefix>test</Prefix>
+		</Filter>
+		<Status>Enabled</Status>
+		<Transition>
+			<Days>10</Days>
+			<StorageClass>Standard</StorageClass>
+		</Transition>
+	</Rule>
+	<Rule>
+		<ID>123422</ID>
+		<Filter>
+			<Prefix>gg</Prefix>
+		</Filter>
+		<Status>Disabled</Status>
+		<Expiration>
+			<Days>10</Days>
+		</Expiration>
+	</Rule>
+</LifecycleConfiguration>`)
+	})
+
+	ref, _, err := client.Bucket.GetLifecycle(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.GetLifecycle returned error: %v", err)
+	}
+
+	want := &BucketGetLifecycleResult{
+		XMLName: xml.Name{Local: "LifecycleConfiguration"},
+		Rules: []BucketLifecycleRule{
+			{
+				ID:         "1234",
+				Filter:     &BucketLifecycleFilter{Prefix: "test"},
+				Status:     "Enabled",
+				Transition: &BucketLifecycleTransition{Days: 10, StorageClass: "Standard"},
+			},
+			{
+				ID:         "123422",
+				Filter:     &BucketLifecycleFilter{Prefix: "gg"},
+				Status:     "Disabled",
+				Expiration: &BucketLifecycleExpiration{Days: 10},
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.GetLifecycle returned %+v, want %+v", ref, want)
+	}
+}
+
+func TestBucketService_PutLifecycle(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketPutLifecycleOptions{
+		Rules: []BucketLifecycleRule{
+			{
+				ID:         "1234",
+				Filter:     &BucketLifecycleFilter{Prefix: "test"},
+				Status:     "Enabled",
+				Transition: &BucketLifecycleTransition{Days: 10, StorageClass: "Standard"},
+			},
+			{
+				ID:         "123422",
+				Filter:     &BucketLifecycleFilter{Prefix: "gg"},
+				Status:     "Disabled",
+				Expiration: &BucketLifecycleExpiration{Days: 10},
+			},
+		},
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		v := new(BucketPutLifecycleOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"lifecycle": "",
+		}
+		testFormValues(t, r, vs)
+
+		want := opt
+		want.XMLName = xml.Name{Local: "LifecycleConfiguration"}
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Bucket.PutLifecycle request body: %+v, want %+v", v, want)
+		}
+
+	})
+
+	_, err := client.Bucket.PutLifecycle(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.PutLifecycle returned error: %v", err)
+	}
+
+}
+
+func TestBucketService_DeleteLifecycle(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodDelete)
+		vs := values{
+			"lifecycle": "",
+		}
+		testFormValues(t, r, vs)
+
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Bucket.DeleteLifecycle(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.DeleteLifecycle returned error: %v", err)
+	}
+
+}
--- a/bucket_location.go
+++ b/bucket_location.go
@ -0,0 +1,30 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+
+// BucketGetLocationResult ...
+type BucketGetLocationResult struct {
+	XMLName  xml.Name `xml:"LocationConstraint"`
+	Location string   `xml:",chardata"`
+}
+
+// GetLocation ...
+//
+// Get Bucket Location接口获取Bucket所在地域信息，只有Bucket所有者有权限读取信息。
+//
+// https://www.qcloud.com/document/product/436/8275
+func (s *BucketService) GetLocation(ctx context.Context) (*BucketGetLocationResult, *Response, error) {
+	var res BucketGetLocationResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?location",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
--- a/bucket_location_test.go
+++ b/bucket_location_test.go
@ -0,0 +1,39 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_GetLocation(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		vs := values{
+			"location": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<?xml version='1.0' encoding='utf-8' ?>
+<LocationConstraint>ap-guangzhou</LocationConstraint>`)
+	})
+
+	ref, _, err := client.Bucket.GetLocation(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.GetLocation returned error: %v", err)
+	}
+
+	want := &BucketGetLocationResult{
+		XMLName:  xml.Name{Local: "LocationConstraint"},
+		Location: "ap-guangzhou",
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.GetLocation returned %+v, want %+v", ref, want)
+	}
+}
--- a/bucket_part.go
+++ b/bucket_part.go
@ -0,0 +1,59 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+
+// ListMultipartUploadsResult ...
+type ListMultipartUploadsResult struct {
+	XMLName            xml.Name `xml:"ListMultipartUploadsResult"`
+	Bucket             string   `xml:"Bucket"`
+	EncodingType       string   `xml:"Encoding-Type"`
+	KeyMarker          string
+	UploadIDMarker     string `xml:"UploadIdMarker"`
+	NextKeyMarker      string
+	NextUploadIDMarker string `xml:"NextUploadIdMarker"`
+	MaxUploads         int
+	IsTruncated        bool
+	Uploads            []struct {
+		Key          string
+		UploadID     string `xml:"UploadId"`
+		StorageClass string
+		Initiator    *Initiator
+		Owner        *Owner
+		Initiated    string
+	} `xml:"Upload,omitempty"`
+	Prefix         string
+	Delimiter      string   `xml:"delimiter,omitempty"`
+	CommonPrefixes []string `xml:"CommonPrefixs>Prefix,omitempty"`
+}
+
+// ListMultipartUploadsOptions ...
+type ListMultipartUploadsOptions struct {
+	Delimiter      string `url:"delimiter,omitempty"`
+	EncodingType   string `url:"encoding-type,omitempty"`
+	Prefix         string `url:"prefix,omitempty"`
+	MaxUploads     int    `url:"max-uploads,omitempty"`
+	KeyMarker      string `url:"key-marker,omitempty"`
+	UploadIDMarker string `url:"upload-id-marker,omitempty"`
+}
+
+// ListMultipartUploads ...
+//
+// List Multipart Uploads用来查询正在进行中的分块上传。单次最多列出1000个正在进行中的分块上传。
+//
+// https://www.qcloud.com/document/product/436/7736
+func (s *BucketService) ListMultipartUploads(ctx context.Context, opt *ListMultipartUploadsOptions) (*ListMultipartUploadsResult, *Response, error) {
+	var res ListMultipartUploadsResult
+	sendOpt := sendOptions{
+		baseURL:  s.client.BaseURL.BucketURL,
+		uri:      "/?uploads",
+		method:   http.MethodGet,
+		result:   &res,
+		optQuery: opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
--- a/bucket_part_test.go
+++ b/bucket_part_test.go
@ -0,0 +1,121 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_ListMultipartUploads(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		vs := values{
+			"uploads": "",
+			"prefix":  "t",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<ListMultipartUploadsResult>
+	<Bucket>test-1253846586</Bucket>
+	<Encoding-Type/>
+	<KeyMarker/>
+	<UploadIdMarker/>
+	<MaxUploads>1000</MaxUploads>
+	<Prefix>t</Prefix>
+	<Delimiter>/</Delimiter>
+	<IsTruncated>false</IsTruncated>
+	<CommonPrefixs>
+		<Prefix>test/</Prefix>
+	</CommonPrefixs>
+	<Upload>
+		<Key>test_multipart.txt</Key>
+		<UploadId>14972623850a5de3f4f10605ab9f339c8bdf1b77e06f03fb981e7e76c86554b7bdb6072b36</UploadId>
+		<Initiator>
+			<ID>100000760461/100000760461</ID>
+			<DisplayName/>
+		</Initiator>
+		<Owner>
+			<ID>100000760461/100000760461</ID>
+			<DisplayName/>
+		</Owner>
+		<StorageClass>STANDARD</StorageClass>
+		<Initiated>2017-06-12T10:13:05.000Z</Initiated>
+	</Upload>
+	<Upload>
+		<Key>test_multipar2t.txt</Key>
+		<UploadId>1497515958744e899fc341bfbb995ebd57b395f63930411d855aaac1b5cd7d834a15442831</UploadId>
+		<Initiator>
+			<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+			<DisplayName>100000760461</DisplayName>
+		</Initiator>
+		<Owner>
+			<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+			<DisplayName>100000760461</DisplayName>
+		</Owner>
+		<StorageClass>STANDARD</StorageClass>
+		<Initiated>2017-06-15T08:39:18.000Z</Initiated>
+	</Upload>
+</ListMultipartUploadsResult>`)
+	})
+
+	opt := &ListMultipartUploadsOptions{
+		Prefix: "t",
+	}
+	ref, _, err := client.Bucket.ListMultipartUploads(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.ListMultipartUploads returned error: %v", err)
+	}
+
+	want := &ListMultipartUploadsResult{
+		XMLName:     xml.Name{Local: "ListMultipartUploadsResult"},
+		Bucket:      "test-1253846586",
+		MaxUploads:  1000,
+		IsTruncated: false,
+		Uploads: []struct {
+			Key          string
+			UploadID     string `xml:"UploadId"`
+			StorageClass string
+			Initiator    *Initiator
+			Owner        *Owner
+			Initiated    string
+		}{
+			{
+				Key:      "test_multipart.txt",
+				UploadID: "14972623850a5de3f4f10605ab9f339c8bdf1b77e06f03fb981e7e76c86554b7bdb6072b36",
+				Initiator: &Initiator{
+					ID: "100000760461/100000760461",
+				},
+				Owner: &Owner{
+					ID: "100000760461/100000760461",
+				},
+				StorageClass: "STANDARD",
+				Initiated:    "2017-06-12T10:13:05.000Z",
+			},
+			{
+				Key:      "test_multipar2t.txt",
+				UploadID: "1497515958744e899fc341bfbb995ebd57b395f63930411d855aaac1b5cd7d834a15442831",
+				Initiator: &Initiator{
+					ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+					DisplayName: "100000760461",
+				},
+				Owner: &Owner{
+					ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+					DisplayName: "100000760461",
+				},
+				StorageClass: "STANDARD",
+				Initiated:    "2017-06-15T08:39:18.000Z",
+			},
+		},
+		Prefix:         "t",
+		CommonPrefixes: []string{"test/"},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.ListMultipartUploads returned \n%+v, want \n%+v", ref, want)
+	}
+}
--- a/bucket_tagging.go
+++ b/bucket_tagging.go
@ -0,0 +1,75 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+
+// BucketTaggingTag ...
+type BucketTaggingTag struct {
+	Key   string
+	Value string
+}
+
+// BucketGetTaggingResult ...
+type BucketGetTaggingResult struct {
+	XMLName xml.Name           `xml:"Tagging"`
+	TagSet  []BucketTaggingTag `xml:"TagSet>Tag,omitempty"`
+}
+
+// GetTagging ...
+//
+// Get Bucket Tagging接口实现获取指定Bucket的标签。
+//
+// https://www.qcloud.com/document/product/436/8277
+func (s *BucketService) GetTagging(ctx context.Context) (*BucketGetTaggingResult, *Response, error) {
+	var res BucketGetTaggingResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?tagging",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// BucketPutTaggingOptions ...
+type BucketPutTaggingOptions struct {
+	XMLName xml.Name           `xml:"Tagging"`
+	TagSet  []BucketTaggingTag `xml:"TagSet>Tag,omitempty"`
+}
+
+// PutTagging ...
+//
+// Put Bucket Tagging接口实现给用指定Bucket打标签。用来组织和管理相关Bucket。
+//
+// 当该请求设置相同Key名称，不同Value时，会返回400。请求成功，则返回204。
+//
+// https://www.qcloud.com/document/product/436/8281
+func (s *BucketService) PutTagging(ctx context.Context, opt *BucketPutTaggingOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?tagging",
+		method:  http.MethodPut,
+		body:    opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// DeleteTagging ...
+//
+// Delete Bucket Tagging接口实现删除指定Bucket的标签。
+//
+// https://www.qcloud.com/document/product/436/8286
+func (s *BucketService) DeleteTagging(ctx context.Context) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?tagging",
+		method:  http.MethodDelete,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
--- a/bucket_tagging_test.go
+++ b/bucket_tagging_test.go
@ -0,0 +1,115 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_GetTagging(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		vs := values{
+			"tagging": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<Tagging>
+	<TagSet>
+		<Tag>
+			<Key>test_k2</Key>
+			<Value>test_v2</Value>
+		</Tag>
+		<Tag>
+			<Key>test_k3</Key>
+			<Value>test_vv</Value>
+		</Tag>
+	</TagSet>
+</Tagging>`)
+	})
+
+	ref, _, err := client.Bucket.GetTagging(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.GetTagging returned error: %v", err)
+	}
+
+	want := &BucketGetTaggingResult{
+		XMLName: xml.Name{Local: "Tagging"},
+		TagSet: []BucketTaggingTag{
+			{"test_k2", "test_v2"},
+			{"test_k3", "test_vv"},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.GetTagging returned %+v, want %+v", ref, want)
+	}
+}
+
+func TestBucketService_PutTagging(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketPutTaggingOptions{
+		TagSet: []BucketTaggingTag{
+			{
+				Key:   "test_k2",
+				Value: "test_v2",
+			},
+			{
+				Key:   "test_k3",
+				Value: "test_v3",
+			},
+		},
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		v := new(BucketPutTaggingOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, "PUT")
+		vs := values{
+			"tagging": "",
+		}
+		testFormValues(t, r, vs)
+
+		want := opt
+		want.XMLName = xml.Name{Local: "Tagging"}
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Bucket.PutTagging request body: %+v, want %+v", v, want)
+		}
+
+	})
+
+	_, err := client.Bucket.PutTagging(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.PutTagging returned error: %v", err)
+	}
+
+}
+
+func TestBucketService_DeleteTagging(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodDelete)
+		vs := values{
+			"tagging": "",
+		}
+		testFormValues(t, r, vs)
+
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Bucket.DeleteTagging(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.DeleteTagging returned error: %v", err)
+	}
+
+}
--- a/bucket_test.go
+++ b/bucket_test.go
@ -0,0 +1,152 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestBucketService_Get(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketGetOptions{
+		Prefix:  "test",
+		MaxKeys: 2,
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodGet)
+		vs := values{
+			"prefix":   "test",
+			"max-keys": "2",
+		}
+		testFormValues(t, r, vs)
+
+		fmt.Fprint(w, `<?xml version='1.0' encoding='utf-8' ?>
+<ListBucketResult>
+	<Name>test-1253846586</Name>
+	<Prefix>test</Prefix>
+	<Marker/>
+	<MaxKeys>2</MaxKeys>
+	<IsTruncated>true</IsTruncated>
+	<NextMarker>test/delete.txt</NextMarker>
+	<Contents>
+		<Key>test/</Key>
+		<LastModified>2017-06-09T16:32:25.000Z</LastModified>
+		<ETag>&quot;&quot;</ETag>
+		<Size>0</Size>
+		<Owner>
+			<ID>1253846586</ID>
+		</Owner>
+		<StorageClass>STANDARD</StorageClass>
+	</Contents>
+	<Contents>
+		<Key>test/anonymous_get.go</Key>
+		<LastModified>2017-06-17T15:09:26.000Z</LastModified>
+		<ETag>&quot;5b7236085f08b3818bfa40b03c946dcc&quot;</ETag>
+		<Size>8</Size>
+		<Owner>
+			<ID>1253846586</ID>
+		</Owner>
+		<StorageClass>STANDARD</StorageClass>
+	</Contents>
+</ListBucketResult>`)
+	})
+
+	ref, _, err := client.Bucket.Get(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.Get returned error: %v", err)
+	}
+
+	want := &BucketGetResult{
+		XMLName:     xml.Name{Local: "ListBucketResult"},
+		Name:        "test-1253846586",
+		Prefix:      "test",
+		MaxKeys:     2,
+		IsTruncated: true,
+		NextMarker:  "test/delete.txt",
+		Contents: []Object{
+			{
+				Key:          "test/",
+				LastModified: "2017-06-09T16:32:25.000Z",
+				ETag:         "\"\"",
+				Size:         0,
+				Owner: &Owner{
+					ID: "1253846586",
+				},
+				StorageClass: "STANDARD",
+			},
+			{
+				Key:          "test/anonymous_get.go",
+				LastModified: "2017-06-17T15:09:26.000Z",
+				ETag:         "\"5b7236085f08b3818bfa40b03c946dcc\"",
+				Size:         8,
+				Owner: &Owner{
+					ID: "1253846586",
+				},
+				StorageClass: "STANDARD",
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Bucket.Get returned %+v, want %+v", ref, want)
+	}
+}
+
+func TestBucketService_Put(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &BucketPutOptions{
+		XCosACL: "public-read",
+	}
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		v := new(BucketPutTaggingOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, "PUT")
+		testHeader(t, r, "x-cos-acl", "public-read")
+	})
+
+	_, err := client.Bucket.Put(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Bucket.Put returned error: %v", err)
+	}
+
+}
+
+func TestBucketService_Delete(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodDelete)
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Bucket.Delete(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.Delete returned error: %v", err)
+	}
+}
+
+func TestBucketService_Head(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodHead)
+		w.WriteHeader(http.StatusOK)
+	})
+
+	_, err := client.Bucket.Head(context.Background())
+	if err != nil {
+		t.Fatalf("Bucket.Head returned error: %v", err)
+	}
+}
--- a/cos.go
+++ b/cos.go
@ -0,0 +1,352 @@
+package cos
+
+import (
+	"bytes"
+	"context"
+	"encoding/base64"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"reflect"
+	"text/template"
+
+	"strconv"
+
+	"github.com/google/go-querystring/query"
+	"github.com/tencentyun/go-httpheader"
+)
+
+const (
+	// Version ...
+	Version               = "0.7.3"
+	userAgent             = "cos-go-sdk-v5/" + Version
+	contentTypeXML        = "application/xml"
+	defaultServiceBaseURL = "https://service.cos.myqcloud.com"
+)
+
+var bucketURLTemplate = template.Must(
+	template.New("bucketURLFormat").Parse(
+		"{{.Schema}}://{{.BucketName}}.cos.{{.Region}}.myqcloud.com",
+	),
+)
+
+// BaseURL 访问各 API 所需的基础 URL
+type BaseURL struct {
+	// 访问 bucket, object 相关 API 的基础 URL（不包含 path 部分）: http://example.com
+	BucketURL *url.URL
+	// 访问 service API 的基础 URL（不包含 path 部分）: http://example.com
+	ServiceURL *url.URL
+}
+
+// NewBucketURL 生成 BaseURL 所需的 BucketURL
+//
+//   bucketName: bucket名称, bucket的命名规则为{name}-{appid} ，此处填写的存储桶名称必须为此格式
+//   Region: 区域代码: ap-beijing-1,ap-beijing,ap-shanghai,ap-guangzhou...
+//   secure: 是否使用 https
+func NewBucketURL(bucketName, region string, secure bool) *url.URL {
+	schema := "https"
+	if !secure {
+		schema = "http"
+	}
+
+	w := bytes.NewBuffer(nil)
+	bucketURLTemplate.Execute(w, struct {
+		Schema     string
+		BucketName string
+		Region     string
+	}{
+		schema, bucketName, region,
+	})
+
+	u, _ := url.Parse(w.String())
+	return u
+}
+
+// A Client manages communication with the COS API.
+type Client struct {
+	client *http.Client
+
+	UserAgent string
+	BaseURL   *BaseURL
+
+	common service
+
+	Service *ServiceService
+	Bucket  *BucketService
+	Object  *ObjectService
+}
+
+type service struct {
+	client *Client
+}
+
+// NewClient returns a new COS API client.
+func NewClient(uri *BaseURL, httpClient *http.Client) *Client {
+	if httpClient == nil {
+		httpClient = &http.Client{}
+	}
+
+	baseURL := &BaseURL{}
+	if uri != nil {
+		baseURL.BucketURL = uri.BucketURL
+		baseURL.ServiceURL = uri.ServiceURL
+	}
+	if baseURL.ServiceURL == nil {
+		baseURL.ServiceURL, _ = url.Parse(defaultServiceBaseURL)
+	}
+
+	c := &Client{
+		client:    httpClient,
+		UserAgent: userAgent,
+		BaseURL:   baseURL,
+	}
+	c.common.client = c
+	c.Service = (*ServiceService)(&c.common)
+	c.Bucket = (*BucketService)(&c.common)
+	c.Object = (*ObjectService)(&c.common)
+	return c
+}
+
+func (c *Client) newRequest(ctx context.Context, baseURL *url.URL, uri, method string, body interface{}, optQuery interface{}, optHeader interface{}) (req *http.Request, err error) {
+	uri, err = addURLOptions(uri, optQuery)
+	if err != nil {
+		return
+	}
+	u, _ := url.Parse(uri)
+	urlStr := baseURL.ResolveReference(u).String()
+
+	var reader io.Reader
+	contentType := ""
+	contentMD5 := ""
+	xsha1 := ""
+	if body != nil {
+		// 上传文件
+		if r, ok := body.(io.Reader); ok {
+			reader = r
+		} else {
+			b, err := xml.Marshal(body)
+			if err != nil {
+				return nil, err
+			}
+			contentType = contentTypeXML
+			reader = bytes.NewReader(b)
+			contentMD5 = base64.StdEncoding.EncodeToString(calMD5Digest(b))
+			//xsha1 = base64.StdEncoding.EncodeToString(calSHA1Digest(b))
+		}
+	} else {
+		contentType = contentTypeXML
+	}
+
+	req, err = http.NewRequest(method, urlStr, reader)
+	if err != nil {
+		return
+	}
+
+	req.Header, err = addHeaderOptions(req.Header, optHeader)
+	if err != nil {
+		return
+	}
+	if v := req.Header.Get("Content-Length"); req.ContentLength == 0 && v != "" && v != "0" {
+		req.ContentLength, _ = strconv.ParseInt(v, 10, 64)
+	}
+
+	if contentMD5 != "" {
+		req.Header["Content-MD5"] = []string{contentMD5}
+	}
+	if xsha1 != "" {
+		req.Header.Set("x-cos-sha1", xsha1)
+	}
+	if c.UserAgent != "" {
+		req.Header.Set("User-Agent", c.UserAgent)
+	}
+	if req.Header.Get("Content-Type") == "" && contentType != "" {
+		req.Header.Set("Content-Type", contentType)
+	}
+	return
+}
+
+func (c *Client) doAPI(ctx context.Context, req *http.Request, result interface{}, closeBody bool) (*Response, error) {
+	req = req.WithContext(ctx)
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		// If we got an error, and the context has been canceled,
+		// the context's error is probably more useful.
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		default:
+		}
+		return nil, err
+	}
+
+	defer func() {
+		if closeBody {
+			// Close the body to let the Transport reuse the connection
+			io.Copy(ioutil.Discard, resp.Body)
+			resp.Body.Close()
+		}
+	}()
+
+	response := newResponse(resp)
+
+	err = checkResponse(resp)
+	if err != nil {
+		// even though there was an error, we still return the response
+		// in case the caller wants to inspect it further
+		return response, err
+	}
+
+	if result != nil {
+		if w, ok := result.(io.Writer); ok {
+			io.Copy(w, resp.Body)
+		} else {
+			err = xml.NewDecoder(resp.Body).Decode(result)
+			if err == io.EOF {
+				err = nil // ignore EOF errors caused by empty response body
+			}
+		}
+	}
+
+	return response, err
+}
+
+type sendOptions struct {
+	// 基础 URL
+	baseURL *url.URL
+	// URL 中除基础 URL 外的剩余部分
+	uri string
+	// 请求方法
+	method string
+
+	body interface{}
+	// url 查询参数
+	optQuery interface{}
+	// http header 参数
+	optHeader interface{}
+	// 用 result 反序列化 resp.Body
+	result interface{}
+	// 是否禁用自动调用 resp.Body.Close()
+	// 自动调用 Close() 是为了能够重用连接
+	disableCloseBody bool
+}
+
+func (c *Client) send(ctx context.Context, opt *sendOptions) (resp *Response, err error) {
+	req, err := c.newRequest(ctx, opt.baseURL, opt.uri, opt.method, opt.body, opt.optQuery, opt.optHeader)
+	if err != nil {
+		return
+	}
+
+	resp, err = c.doAPI(ctx, req, opt.result, !opt.disableCloseBody)
+	if err != nil {
+		return
+	}
+	return
+}
+
+// addURLOptions adds the parameters in opt as URL query parameters to s. opt
+// must be a struct whose fields may contain "url" tags.
+func addURLOptions(s string, opt interface{}) (string, error) {
+	v := reflect.ValueOf(opt)
+	if v.Kind() == reflect.Ptr && v.IsNil() {
+		return s, nil
+	}
+
+	u, err := url.Parse(s)
+	if err != nil {
+		return s, err
+	}
+
+	qs, err := query.Values(opt)
+	if err != nil {
+		return s, err
+	}
+
+	// 保留原有的参数，并且放在前面。因为 cos 的 url 路由是以第一个参数作为路由的
+	// e.g. /?uploads
+	q := u.RawQuery
+	rq := qs.Encode()
+	if q != "" {
+		if rq != "" {
+			u.RawQuery = fmt.Sprintf("%s&%s", q, qs.Encode())
+		}
+	} else {
+		u.RawQuery = rq
+	}
+	return u.String(), nil
+}
+
+// addHeaderOptions adds the parameters in opt as Header fields to req. opt
+// must be a struct whose fields may contain "header" tags.
+func addHeaderOptions(header http.Header, opt interface{}) (http.Header, error) {
+	v := reflect.ValueOf(opt)
+	if v.Kind() == reflect.Ptr && v.IsNil() {
+		return header, nil
+	}
+
+	h, err := httpheader.Header(opt)
+	if err != nil {
+		return nil, err
+	}
+
+	for key, values := range h {
+		for _, value := range values {
+			header.Add(key, value)
+		}
+	}
+	return header, nil
+}
+
+// Owner ...
+type Owner struct {
+	UIN         string `xml:"uin,omitempty"`
+	ID          string `xml:",omitempty"`
+	DisplayName string `xml:",omitempty"`
+}
+
+// Initiator ...
+type Initiator Owner
+
+// Response API 响应
+type Response struct {
+	*http.Response
+}
+
+func newResponse(resp *http.Response) *Response {
+	return &Response{
+		Response: resp,
+	}
+}
+
+// ACLHeaderOptions ...
+type ACLHeaderOptions struct {
+	XCosACL              string `header:"x-cos-acl,omitempty" url:"-" xml:"-"`
+	XCosGrantRead        string `header:"x-cos-grant-read,omitempty" url:"-" xml:"-"`
+	XCosGrantWrite       string `header:"x-cos-grant-write,omitempty" url:"-" xml:"-"`
+	XCosGrantFullControl string `header:"x-cos-grant-full-control,omitempty" url:"-" xml:"-"`
+}
+
+// ACLGrantee ...
+type ACLGrantee struct {
+	Type        string `xml:"type,attr"`
+	UIN         string `xml:"uin,omitempty"`
+	ID          string `xml:",omitempty"`
+	DisplayName string `xml:",omitempty"`
+	SubAccount  string `xml:"Subaccount,omitempty"`
+}
+
+// ACLGrant ...
+type ACLGrant struct {
+	Grantee    *ACLGrantee
+	Permission string
+}
+
+// ACLXml ...
+type ACLXml struct {
+	XMLName           xml.Name `xml:"AccessControlPolicy"`
+	Owner             *Owner
+	AccessControlList []ACLGrant `xml:"AccessControlList>Grant,omitempty"`
+}
--- a/cos_test.go
+++ b/cos_test.go
@ -0,0 +1,156 @@
+package cos
+
+import (
+	"bytes"
+	"encoding/xml"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"reflect"
+	"testing"
+	"time"
+)
+
+var (
+	// mux is the HTTP request multiplexer used with the test server.
+	mux *http.ServeMux
+
+	// client is the COS client being tested.
+	client *Client
+
+	// server is a test HTTP server used to provide mock API responses.
+	server *httptest.Server
+)
+
+// setup sets up a test HTTP server along with a cos.Client that is
+// configured to talk to that test server. Tests should register handlers on
+// mux which provide mock responses for the API method being tested.
+func setup() {
+	// test server
+	mux = http.NewServeMux()
+	server = httptest.NewServer(mux)
+
+	u, _ := url.Parse(server.URL)
+	client = NewClient(&BaseURL{u, u}, nil)
+}
+
+// teardown closes the test HTTP server.
+func teardown() {
+	server.Close()
+}
+
+type values map[string]string
+
+func testFormValues(t *testing.T, r *http.Request, values values) {
+	want := url.Values{}
+	for k, v := range values {
+		want.Set(k, v)
+	}
+
+	r.ParseForm()
+	if got := r.Form; !reflect.DeepEqual(got, want) {
+		t.Errorf("Request parameters: %v, want %v", got, want)
+	}
+}
+
+func testMethod(t *testing.T, r *http.Request, want string) {
+	if got := r.Method; got != want {
+		t.Errorf("Request method: %v, want %v", got, want)
+	}
+}
+
+func testHeader(t *testing.T, r *http.Request, header string, want string) {
+	if got := r.Header.Get(header); got != want {
+		t.Errorf("Header.Get(%q) returned %q, want %q", header, got, want)
+	}
+}
+
+func testURLParseError(t *testing.T, err error) {
+	if err == nil {
+		t.Errorf("Expected error to be returned")
+	}
+	if err, ok := err.(*url.Error); !ok || err.Op != "parse" {
+		t.Errorf("Expected URL parse error, got %+v", err)
+	}
+}
+
+func testBody(t *testing.T, r *http.Request, want string) {
+	b, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		t.Errorf("Error reading request body: %v", err)
+	}
+	if got := string(b); got != want {
+		t.Errorf("request Body is %s, want %s", got, want)
+	}
+}
+
+// Helper function to test that a value is marshalled to XML as expected.
+func testXMLMarshal(t *testing.T, v interface{}, want string) {
+	j, err := xml.Marshal(v)
+	if err != nil {
+		t.Errorf("Unable to marshal JSON for %v", v)
+	}
+
+	w := new(bytes.Buffer)
+	err = xml.NewEncoder(w).Encode([]byte(want))
+	if err != nil {
+		t.Errorf("String is not valid json: %s", want)
+	}
+
+	if w.String() != string(j) {
+		t.Errorf("xml.Marshal(%q) returned %s, want %s", v, j, w)
+	}
+
+	// now go the other direction and make sure things unmarshal as expected
+	u := reflect.ValueOf(v).Interface()
+	if err := xml.Unmarshal([]byte(want), u); err != nil {
+		t.Errorf("Unable to unmarshal XML for %v", want)
+	}
+
+	if !reflect.DeepEqual(v, u) {
+		t.Errorf("xml.Unmarshal(%q) returned %s, want %s", want, u, v)
+	}
+}
+
+func TestNewClient(t *testing.T) {
+	c := NewClient(nil, nil)
+
+	if got, want := c.BaseURL.ServiceURL.String(), defaultServiceBaseURL; got != want {
+		t.Errorf("NewClient BaseURL is %v, want %v", got, want)
+	}
+	if got, want := c.UserAgent, userAgent; got != want {
+		t.Errorf("NewClient UserAgent is %v, want %v", got, want)
+	}
+}
+
+func TestNewBucketURL_secure_false(t *testing.T) {
+	got := NewBucketURL("bname-idx", "ap-guangzhou", false).String()
+	want := "http://bname-idx.cos.ap-guangzhou.myqcloud.com"
+	if got != want {
+		t.Errorf("NewBucketURL is %v, want %v", got, want)
+	}
+}
+
+func TestNewBucketURL_secure_true(t *testing.T) {
+	got := NewBucketURL("bname-idx", "ap-guangzhou", true).String()
+	want := "https://bname-idx.cos.ap-guangzhou.myqcloud.com"
+	if got != want {
+		t.Errorf("NewBucketURL is %v, want %v", got, want)
+	}
+}
+
+func TestClient_doAPI(t *testing.T) {
+	setup()
+	defer teardown()
+
+}
+
+func TestNewAuthTime(t *testing.T) {
+	a := NewAuthTime(time.Hour)
+	if a.SignStartTime != a.KeyStartTime ||
+		a.SignEndTime != a.SignEndTime ||
+		a.SignStartTime.Add(time.Hour) != a.SignEndTime {
+		t.Errorf("NewAuthTime request got %+v is not valid", a)
+	}
+}
--- a/debug/http.go
+++ b/debug/http.go
@ -0,0 +1,70 @@
+package debug
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httputil"
+	"os"
+)
+
+// DebugRequestTransport 会打印请求和响应信息, 方便调试.
+type DebugRequestTransport struct {
+	RequestHeader  bool
+	RequestBody    bool // RequestHeader 为 true 时,这个选项才会生效
+	ResponseHeader bool
+	ResponseBody   bool // ResponseHeader 为 true 时,这个选项才会生效
+
+	// debug 信息输出到 Writer 中, 默认是 os.Stderr
+	Writer io.Writer
+
+	Transport http.RoundTripper
+}
+
+// RoundTrip implements the RoundTripper interface.
+func (t *DebugRequestTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	req = cloneRequest(req) // per RoundTrip contract
+	w := t.Writer
+	if w == nil {
+		w = os.Stderr
+	}
+
+	if t.RequestHeader {
+		a, _ := httputil.DumpRequestOut(req, t.RequestBody)
+		fmt.Fprintf(w, "%s\n\n", string(a))
+	}
+
+	resp, err := t.transport().RoundTrip(req)
+	if err != nil {
+		return resp, err
+	}
+
+	if t.ResponseHeader {
+
+		b, _ := httputil.DumpResponse(resp, t.ResponseBody)
+		fmt.Fprintf(w, "%s\n", string(b))
+	}
+
+	return resp, err
+}
+
+func (t *DebugRequestTransport) transport() http.RoundTripper {
+	if t.Transport != nil {
+		return t.Transport
+	}
+	return http.DefaultTransport
+}
+
+// cloneRequest returns a clone of the provided *http.Request. The clone is a
+// shallow copy of the struct and its Header map.
+func cloneRequest(r *http.Request) *http.Request {
+	// shallow copy of the struct
+	r2 := new(http.Request)
+	*r2 = *r
+	// deep copy of the Header
+	r2.Header = make(http.Header, len(r.Header))
+	for k, s := range r.Header {
+		r2.Header[k] = append([]string(nil), s...)
+	}
+	return r2
+}
--- a/debug/http_test.go
+++ b/debug/http_test.go
@ -0,0 +1,78 @@
+package debug
+
+import (
+	"bytes"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+var (
+	// mux is the HTTP request multiplexer used with the test server.
+	mux *http.ServeMux
+
+	// server is a test HTTP server used to provide mock API responses.
+	server *httptest.Server
+)
+
+// setup sets up a test HTTP server along with a cos.Client that is
+// configured to talk to that test server. Tests should register handlers on
+// mux which provide mock responses for the API method being tested.
+func setup() {
+	// test server
+	mux = http.NewServeMux()
+	server = httptest.NewServer(mux)
+}
+
+// teardown closes the test HTTP server.
+func teardown() {
+	server.Close()
+}
+
+func TestDebugRequestTransport(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("X-Test-Response", "2333")
+		w.WriteHeader(http.StatusBadGateway)
+		w.Write([]byte("test response body"))
+	})
+
+	w := bytes.NewBufferString("")
+	client := http.Client{}
+
+	client.Transport = &DebugRequestTransport{
+		RequestHeader:  true,
+		RequestBody:    true,
+		ResponseHeader: true,
+		ResponseBody:   true,
+		Writer:         w,
+	}
+
+	body := bytes.NewReader([]byte("test_request body"))
+	req, _ := http.NewRequest("GET", server.URL, body)
+	req.Header.Add("X-Test-Debug", "123")
+	client.Do(req)
+
+	b := make([]byte, 800)
+	w.Read(b)
+	info := string(b)
+	if !strings.Contains(info, "GET / HTTP/1.1\r\n") ||
+		!strings.Contains(info, "X-Test-Debug: 123\r\n") {
+		t.Errorf("DebugRequestTransport debug info %#v don't contains request header", info)
+	}
+	if !strings.Contains(info, "\r\n\r\ntest_request body") {
+		t.Errorf("DebugRequestTransport debug info  %#v don't contains request body", info)
+	}
+
+	if !strings.Contains(info, "HTTP/1.1 502 Bad Gateway\r\n") ||
+		!strings.Contains(info, "X-Test-Response: 2333\r\n") {
+		t.Errorf("DebugRequestTransport debug info  %#v don't contains response header", info)
+	}
+
+	if !strings.Contains(info, "\r\n\r\ntest response body") {
+		t.Errorf("DebugRequestTransport debug info  %#v don't contains response body", info)
+	}
+}
--- a/doc.go
+++ b/doc.go
@ -0,0 +1,29 @@
+/*
+Package cos 腾讯云对象存储服务 COS(Cloud Object Storage) Go SDK。
+
+
+COS API Version
+
+封装了 V5 版本的 XML API 。
+
+
+Usage
+
+在项目的 example 目录下有各个 API 的使用示例 。
+
+
+Authentication
+
+默认所有 API 都是匿名访问. 如果想添加认证信息的话,可以通过自定义一个 http.Client 来添加认证信息.
+
+比如, 使用内置的 AuthorizationTransport 来为请求增加 Authorization Header 签名信息:
+
+	client := cos.NewClient(b, &http.Client{
+			Transport: &cos.AuthorizationTransport{
+				SecretID:  "COS_SECRETID",
+				SecretKey: "COS_SECRETKEY",
+			},
+		})
+
+*/
+package cos
--- a/error.go
+++ b/error.go
@ -0,0 +1,49 @@
+package cos
+
+import (
+	"encoding/xml"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+// ErrorResponse 包含 API 返回的错误信息
+//
+// https://www.qcloud.com/document/product/436/7730
+type ErrorResponse struct {
+	XMLName   xml.Name       `xml:"Error"`
+	Response  *http.Response `xml:"-"`
+	Code      string
+	Message   string
+	Resource  string
+	RequestID string `header:"x-cos-request-id,omitempty" url:"-" xml:"-"`
+	TraceID   string `xml:"TraceId,omitempty"`
+}
+
+// Error ...
+func (r *ErrorResponse) Error() string {
+	RequestID := r.RequestID
+	if (RequestID == "") {
+		RequestID = r.Response.Header["X-Cos-Request-Id"][0]
+	}
+	TraceID := r.TraceID
+	if (TraceID == "") {
+		TraceID = r.Response.Header["X-Cos-Trace-Id"][0]
+	}
+	return fmt.Sprintf("%v %v: %d %v(Message: %v, RequestId: %v, TraceId: %v)",
+		r.Response.Request.Method, r.Response.Request.URL,
+		r.Response.StatusCode, r.Code, r.Message, RequestID, TraceID)
+}
+
+// 检查 response 是否是出错时的返回的 response
+func checkResponse(r *http.Response) error {
+	if c := r.StatusCode; 200 <= c && c <= 299 {
+		return nil
+	}
+	errorResponse := &ErrorResponse{Response: r}
+	data, err := ioutil.ReadAll(r.Body)
+	if err == nil && data != nil {
+		xml.Unmarshal(data, errorResponse)
+	}
+	return errorResponse
+}
--- a/error_test.go
+++ b/error_test.go
@ -0,0 +1,56 @@
+package cos
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+)
+
+// func Test_checkResponse_error(t *testing.T) {
+// 	setup()
+// 	defer teardown()
+
+// 	mux.HandleFunc("/test_409", func(w http.ResponseWriter, r *http.Request) {
+// 		w.WriteHeader(http.StatusConflict)
+// 		fmt.Fprint(w, `<?xml version='1.0' encoding='utf-8' ?>
+// <Error>
+// 	<Code>BucketAlreadyExists</Code>
+// 	<Message>The requested bucket name is not available.</Message>
+// 	<Resource>testdelete-1253846586.cos.ap-guangzhou.myqcloud.com</Resource>
+// 	<RequestId>NTk0NTRjZjZfNTViMjM1XzlkMV9hZTZh</RequestId>
+// 	<TraceId>OGVmYzZiMmQzYjA2OWNhODk0NTRkMTBiOWVmMDAxODc0OWRkZjk0ZDM1NmI1M2E2MTRlY2MzZDhmNmI5MWI1OTBjYzE2MjAxN2M1MzJiOTdkZjMxMDVlYTZjN2FiMmI0NTk3NWFiNjAyMzdlM2RlMmVmOGNiNWIxYjYwNDFhYmQ=</TraceId>
+// </Error>`)
+// 	})
+
+// 	req, _ := http.NewRequest("GET", client.BaseURL.ServiceURL.String()+"/test_409", nil)
+// 	resp, _ := client.client.Do(req)
+// 	err := checkResponse(resp)
+
+// 	if e, ok := err.(*ErrorResponse); ok {
+// 		if e.Error() == "" {
+// 			t.Errorf("Expected e.Error() not empty, got %+v", e.Error())
+// 		}
+// 		if e.Code != "BucketAlreadyExists" {
+// 			t.Errorf("Expected BucketAlreadyExists error, got %+v", e.Code)
+// 		}
+// 	} else {
+// 		t.Errorf("Expected ErrorResponse error, got %+v", err)
+// 	}
+// }
+
+func Test_checkResponse_no_error(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/test_200", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, `test`)
+	})
+
+	req, _ := http.NewRequest("GET", client.BaseURL.ServiceURL.String()+"/test_200", nil)
+	resp, _ := client.client.Do(req)
+	err := checkResponse(resp)
+
+	if err != nil {
+		t.Errorf("Expected error == nil, got %+v", err)
+	}
+}
--- a/example/README.md
+++ b/example/README.md
@ -0,0 +1,8 @@
+
+
+```
+export COS_SECRETID=xx
+export COS_SECRETKEY=xxx
+
+go run xxx.go
+```
--- a/example/bucket/delete.go
+++ b/example/bucket/delete.go
@ -0,0 +1,36 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://testdelete-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	_, err := c.Bucket.Delete(context.Background())
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/deleteCORS.go
+++ b/example/bucket/deleteCORS.go
@ -0,0 +1,36 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	_, err := c.Bucket.DeleteCORS(context.Background())
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/deleteLifecycle.go
+++ b/example/bucket/deleteLifecycle.go
@ -0,0 +1,35 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+        "github.com/tencentyun/cos-go-sdk-v5"
+        "github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	_, err := c.Bucket.DeleteLifecycle(context.Background())
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/deleteTagging.go
+++ b/example/bucket/deleteTagging.go
@ -0,0 +1,36 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	_, err := c.Bucket.DeleteTagging(context.Background())
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/get.go
+++ b/example/bucket/get.go
@ -0,0 +1,46 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"net/url"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	opt := &cos.BucketGetOptions{
+		Prefix:  "test",
+		MaxKeys: 3,
+	}
+	v, _, err := c.Bucket.Get(context.Background(), opt)
+	if err != nil {
+		panic(err)
+	}
+
+	for _, c := range v.Contents {
+		fmt.Printf("%s, %d\n", c.Key, c.Size)
+	}
+}
--- a/example/bucket/getACL.go
+++ b/example/bucket/getACL.go
@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	v, _, err := c.Bucket.GetACL(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	for _, a := range v.AccessControlList {
+		fmt.Printf("%s, %s, %s\n", a.Grantee.Type, a.Grantee.ID, a.Permission)
+	}
+}
--- a/example/bucket/getCORS.go
+++ b/example/bucket/getCORS.go
@ -0,0 +1,41 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	v, _, err := c.Bucket.GetCORS(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	for _, r := range v.Rules {
+
+		fmt.Printf("%s, %s\n", r.AllowedOrigins, r.AllowedMethods)
+	}
+}
--- a/example/bucket/getLifecycle.go
+++ b/example/bucket/getLifecycle.go
@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	v, _, err := c.Bucket.GetLifecycle(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	for _, r := range v.Rules {
+		fmt.Printf("%s, %s\n", r.Filter.Prefix, r.Status)
+	}
+}
--- a/example/bucket/getLocation.go
+++ b/example/bucket/getLocation.go
@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	v, _, err := c.Bucket.GetLocation(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", v.Location)
+}
--- a/example/bucket/getTagging.go
+++ b/example/bucket/getTagging.go
@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	v, _, err := c.Bucket.GetTagging(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	for _, t := range v.TagSet {
+		fmt.Printf("%s: %s\n", t.Key, t.Value)
+	}
+}
--- a/example/bucket/head.go
+++ b/example/bucket/head.go
@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	resp, err := c.Bucket.Head(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(resp.Status)
+}
--- a/example/bucket/listMultipartUploads.go
+++ b/example/bucket/listMultipartUploads.go
@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	opt := &cos.ListMultipartUploadsOptions{
+		Prefix: "t",
+	}
+	v, _, err := c.Bucket.ListMultipartUploads(context.Background(), opt)
+	if err != nil {
+		panic(err)
+	}
+	for _, p := range v.Uploads {
+		fmt.Printf("%s\n", p.Key)
+	}
+}
--- a/example/bucket/put.go
+++ b/example/bucket/put.go
@ -0,0 +1,39 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://testdelete-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	//opt := &cos.BucketPutOptions{
+	//	XCosACL: "public-read",
+	//}
+	_, err := c.Bucket.Put(context.Background(), nil)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/putACL.go
+++ b/example/bucket/putACL.go
@ -0,0 +1,65 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	// with header
+	opt := &cos.BucketPutACLOptions{
+		Header: &cos.ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+	_, err := c.Bucket.PutACL(context.Background(), opt)
+	if err != nil {
+		panic(err)
+	}
+
+	// with body
+	opt = &cos.BucketPutACLOptions{
+		Body: &cos.ACLXml{
+			Owner: &cos.Owner{
+				ID: "qcs::cam::uin/100000760461:uin/100000760461",
+			},
+			AccessControlList: []cos.ACLGrant{
+				{
+					Grantee: &cos.ACLGrantee{
+						Type: "RootAccount",
+						ID:   "qcs::cam::uin/100000760461:uin/100000760461",
+					},
+
+					Permission: "FULL_CONTROL",
+				},
+			},
+		},
+	}
+	_, err = c.Bucket.PutACL(context.Background(), opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/putCORS.go
+++ b/example/bucket/putCORS.go
@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	opt := &cos.BucketPutCORSOptions{
+		Rules: []cos.BucketCORSRule{
+			{
+				AllowedOrigins: []string{"http://www.qq.com"},
+				AllowedMethods: []string{"PUT", "GET"},
+				AllowedHeaders: []string{"x-cos-meta-test", "x-cos-xx"},
+				MaxAgeSeconds:  500,
+				ExposeHeaders:  []string{"x-cos-meta-test1"},
+			},
+			{
+				ID:             "1234",
+				AllowedOrigins: []string{"http://www.baidu.com", "twitter.com"},
+				AllowedMethods: []string{"PUT", "GET"},
+				MaxAgeSeconds:  500,
+			},
+		},
+	}
+	_, err := c.Bucket.PutCORS(context.Background(), opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/putLifecycle.go
+++ b/example/bucket/putLifecycle.go
@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://testhuanan-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	lc := &cos.BucketPutLifecycleOptions{
+		Rules: []cos.BucketLifecycleRule{
+			{
+				ID:     "1234",
+				Filter: &cos.BucketLifecycleFilter{Prefix: "test"},
+				Status: "Enabled",
+				Transition: &cos.BucketLifecycleTransition{
+					Days:         10,
+					StorageClass: "Standard",
+				},
+			},
+			{
+				ID: "123422",
+				// If used for all objecs set Prefix:""
+				Filter: &cos.BucketLifecycleFilter{Prefix: "gg"},
+				Status: "Disabled",
+				Expiration: &cos.BucketLifecycleExpiration{
+					Days: 10,
+				},
+			},
+		},
+	}
+	_, err := c.Bucket.PutLifecycle(context.Background(), lc)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/bucket/putTagging.go
+++ b/example/bucket/putTagging.go
@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+	"time"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+	startTime := time.Now()
+
+	tg := &cos.BucketPutTaggingOptions{
+		TagSet: []cos.BucketTaggingTag{
+			{
+				Key:   "test_k2",
+				Value: "test_v2",
+			},
+			{
+				Key:   "test_k3",
+				Value: "test_v3",
+			},
+			{
+				Key:   startTime.Format("02_Jan_06_15_04_MST"),
+				Value: "test_time",
+			},
+		},
+	}
+	_, err := c.Bucket.PutTagging(context.Background(), tg)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/MutiUpload.go
+++ b/example/object/MutiUpload.go
@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+	"time"
+	"net/http"
+
+	"fmt"
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("http://tencentyun02-1252448703.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		//设置超时时间
+		Timeout: 100 * time.Second,
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_Key"),
+			SecretKey: os.Getenv("COS_Secret"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  false,
+				RequestBody:    false,
+				ResponseHeader: false,
+				ResponseBody:   false,
+			},
+		},
+	})
+	f,err:=os.Open("E:/cos-php-sdk.zip")
+	if err!=nil {panic(err)}
+	opt := &cos.MultiUploadOptions{
+		OptIni: nil,
+		PartSize:1,
+	}
+	v, _, err := c.Object.MultiUpload(
+		context.Background(), "test", f, opt,
+	)
+	if err!=nil {panic(err)}
+	fmt.Println(v)
+}
--- a/example/object/abortMultipartUpload.go
+++ b/example/object/abortMultipartUpload.go
@ -0,0 +1,43 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    false,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test_multipart.txt"
+	v, _, err := c.Object.InitiateMultipartUpload(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", v.UploadID)
+
+	resp, err := c.Object.AbortMultipartUpload(context.Background(), name, v.UploadID)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", resp.Status)
+}
--- a/example/object/append.go
+++ b/example/object/append.go
@ -0,0 +1,75 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"math/rand"
+	"net/url"
+	"os"
+	"time"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func genBigData(blockSize int) []byte {
+	b := make([]byte, blockSize)
+	if _, err := rand.Read(b); err != nil {
+		panic(err)
+	}
+	return b
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{
+		BucketURL: u,
+	}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    false,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	startTime := time.Now()
+
+	name := fmt.Sprintf("test/test_object_append_%s", startTime.Format(time.RFC3339))
+	data := genBigData(1024 * 1024 * 1)
+	length := len(data)
+	r := bytes.NewReader(data)
+
+	ctx := context.Background()
+
+	// 第一次就必须 append
+	resp, err := c.Object.Append(ctx, name, 0, r, nil)
+	if err != nil {
+		panic(err)
+		return
+	}
+	fmt.Printf("%s\n", resp.Status)
+
+	// head
+	if _, err = c.Object.Head(ctx, name, nil); err != nil {
+		panic(err)
+		return
+	}
+
+	// 再次 append
+	data = genBigData(1024 * 1024 * 5)
+	r = bytes.NewReader(data)
+	resp, err = c.Object.Append(context.Background(), name, length, r, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", resp.Status)
+}
--- a/example/object/completeMultipartUpload.go
+++ b/example/object/completeMultipartUpload.go
@ -0,0 +1,95 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+	"net/url"
+	"os"
+	"strings"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func initUpload(c *cos.Client, name string) *cos.InitiateMultipartUploadResult {
+	v, _, err := c.Object.InitiateMultipartUpload(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%#v\n", v)
+	return v
+}
+
+func uploadPart(c *cos.Client, name string, uploadID string, blockSize, n int) string {
+
+	b := make([]byte, blockSize)
+	if _, err := rand.Read(b); err != nil {
+		panic(err)
+	}
+	s := fmt.Sprintf("%X", b)
+	f := strings.NewReader(s)
+
+	resp, err := c.Object.UploadPart(
+		context.Background(), name, uploadID, n, f, nil,
+	)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", resp.Status)
+	return resp.Header.Get("Etag")
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    false,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/test_complete_upload.go"
+	up := initUpload(c, name)
+	uploadID := up.UploadID
+	blockSize := 1024 * 1024 * 3
+
+	opt := &cos.CompleteMultipartUploadOptions{}
+	for i := 1; i < 5; i++ {
+		etag := uploadPart(c, name, uploadID, blockSize, i)
+		opt.Parts = append(opt.Parts, cos.Object{
+			PartNumber: i, ETag: etag},
+		)
+	}
+
+	c = cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+	v, resp, err := c.Object.CompleteMultipartUpload(
+		context.Background(), name, uploadID, opt,
+	)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", resp.Status)
+	fmt.Printf("%#v\n", v)
+	fmt.Printf("%s\n", v.Location)
+}
--- a/example/object/copy.go
+++ b/example/object/copy.go
@ -0,0 +1,63 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+	"strings"
+
+	"net/http"
+
+	"fmt"
+	"io/ioutil"
+	"time"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	source := "test/objectMove1.go"
+	expected := "test"
+	f := strings.NewReader(expected)
+
+	_, err := c.Object.Put(context.Background(), source, f, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	soruceURL := fmt.Sprintf("%s/%s", u.Host, source)
+	dest := fmt.Sprintf("test/objectMove_%d.go", time.Now().Nanosecond())
+	//opt := &cos.ObjectCopyOptions{}
+	res, _, err := c.Object.Copy(context.Background(), dest, soruceURL, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%+v\n\n", res)
+
+	resp, err := c.Object.Get(context.Background(), dest, nil)
+	if err != nil {
+		panic(err)
+	}
+	bs, _ := ioutil.ReadAll(resp.Body)
+	resp.Body.Close()
+	result := string(bs)
+	if result != expected {
+		panic(fmt.Sprintf("%s != %s", result, expected))
+	}
+}
--- a/example/object/delete.go
+++ b/example/object/delete.go
@ -0,0 +1,36 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/objectPut.go"
+
+	_, err := c.Object.Delete(context.Background(), name)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/deleteMultiple.go
+++ b/example/object/deleteMultiple.go
@ -0,0 +1,102 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+	"time"
+
+	"bytes"
+	"io"
+
+	"math/rand"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func genBigData(blockSize int) []byte {
+	b := make([]byte, blockSize)
+	if _, err := rand.Read(b); err != nil {
+		panic(err)
+	}
+	return b
+}
+
+func uploadMulti(c *cos.Client) []string {
+	names := []string{}
+	data := genBigData(1024 * 1024 * 1)
+	ctx := context.Background()
+	var r io.Reader
+	var name string
+	n := 3
+
+	for n > 0 {
+		name = fmt.Sprintf("test/test_multi_delete_%s", time.Now().Format(time.RFC3339))
+		r = bytes.NewReader(data)
+
+		c.Object.Put(ctx, name, r, nil)
+		names = append(names, name)
+		n--
+	}
+	return names
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    false,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+	ctx := context.Background()
+
+	names := uploadMulti(c)
+	names = append(names, []string{"a", "b", "c", "a+bc/xx&?+# "}...)
+	obs := []cos.Object{}
+	for _, v := range names {
+		obs = append(obs, cos.Object{Key: v})
+	}
+	//sha1 := ""
+	opt := &cos.ObjectDeleteMultiOptions{
+		Objects: obs,
+		//XCosSha1: sha1,
+		//Quiet: true,
+	}
+
+	c = cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	v, _, err := c.Object.DeleteMulti(ctx, opt)
+	if err != nil {
+		panic(err)
+	}
+
+	for _, x := range v.DeletedObjects {
+		fmt.Printf("deleted %s\n", x.Key)
+	}
+	for _, x := range v.Errors {
+		fmt.Printf("error %s, %s, %s\n", x.Key, x.Code, x.Message)
+	}
+}
--- a/example/object/get.go
+++ b/example/object/get.go
@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"io/ioutil"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/hello.txt"
+	resp, err := c.Object.Get(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	bs, _ := ioutil.ReadAll(resp.Body)
+	resp.Body.Close()
+	fmt.Printf("%s\n", string(bs))
+
+	// range
+	opt := &cos.ObjectGetOptions{
+		ResponseContentType: "text/html",
+		Range:               "bytes=0-3",
+	}
+	resp, err = c.Object.Get(context.Background(), name, opt)
+	if err != nil {
+		panic(err)
+	}
+	bs, _ = ioutil.ReadAll(resp.Body)
+	resp.Body.Close()
+	fmt.Printf("%s\n", string(bs))
+}
--- a/example/object/getACL.go
+++ b/example/object/getACL.go
@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/hello.txt"
+	v, _, err := c.Object.GetACL(context.Background(), name)
+	if err != nil {
+		panic(err)
+	}
+	for _, a := range v.AccessControlList {
+		fmt.Printf("%s, %s, %s\n", a.Grantee.Type, a.Grantee.ID, a.Permission)
+	}
+
+}
--- a/example/object/getAnonymous.go
+++ b/example/object/getAnonymous.go
@ -0,0 +1,45 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"strings"
+
+	"io/ioutil"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+)
+
+func upload(c *cos.Client, name string) {
+	f := strings.NewReader("test")
+	f = strings.NewReader("test xxx")
+	opt := &cos.ObjectPutOptions{
+		ObjectPutHeaderOptions: &cos.ObjectPutHeaderOptions{
+			ContentType: "text/html",
+		},
+		ACLHeaderOptions: &cos.ACLHeaderOptions{
+			XCosACL: "public-read",
+		},
+	}
+	c.Object.Put(context.Background(), name, f, opt)
+	return
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, nil)
+
+	name := "test/anonymous_get.go"
+	upload(c, name)
+
+	resp, err := c.Object.Get(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+		return
+	}
+	bs, _ := ioutil.ReadAll(resp.Body)
+	defer resp.Body.Close()
+	fmt.Printf("%s\n", string(bs))
+}
--- a/example/object/head.go
+++ b/example/object/head.go
@ -0,0 +1,35 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/hello.txt"
+	_, err := c.Object.Head(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/initiateMultipartUpload.go
+++ b/example/object/initiateMultipartUpload.go
@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/url"
+	"os"
+	"time"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test_multipart" + time.Now().Format(time.RFC3339)
+	v, _, err := c.Object.InitiateMultipartUpload(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", v.UploadID)
+}
--- a/example/object/listParts.go
+++ b/example/object/listParts.go
@ -0,0 +1,81 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+	"net/url"
+	"os"
+	"strings"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func initUpload(c *cos.Client, name string) *cos.InitiateMultipartUploadResult {
+	v, _, err := c.Object.InitiateMultipartUpload(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%#v\n", v)
+	return v
+}
+
+func uploadPart(c *cos.Client, name string, uploadID string, blockSize, n int) string {
+
+	b := make([]byte, blockSize)
+	if _, err := rand.Read(b); err != nil {
+		panic(err)
+	}
+	s := fmt.Sprintf("%X", b)
+	f := strings.NewReader(s)
+
+	resp, err := c.Object.UploadPart(
+		context.Background(), name, uploadID, n, f, nil,
+	)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%s\n", resp.Status)
+	return resp.Header.Get("Etag")
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    false,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/test_list_parts.go"
+	up := initUpload(c, name)
+	uploadID := up.UploadID
+	ctx := context.Background()
+	blockSize := 1024 * 1024 * 3
+
+	for i := 1; i < 5; i++ {
+		uploadPart(c, name, uploadID, blockSize, i)
+	}
+
+	v, _, err := c.Object.ListParts(ctx, name, uploadID)
+	if err != nil {
+		panic(err)
+		return
+	}
+	for _, p := range v.Parts {
+		fmt.Printf("%d, %s, %d\n", p.PartNumber, p.ETag, p.Size)
+	}
+	fmt.Printf("%s\n", v.Initiator.ID)
+	fmt.Printf("%s\n", v.Owner.ID)
+}
--- a/example/object/options.go
+++ b/example/object/options.go
@ -0,0 +1,39 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/hello.txt"
+	opt := &cos.ObjectOptionsOptions{
+		Origin: "http://www.qq.com",
+		AccessControlRequestMethod: "PUT",
+	}
+	_, err := c.Object.Options(context.Background(), name, opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/put.go
+++ b/example/object/put.go
@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+	"strings"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/objectPut.go"
+	f := strings.NewReader("test")
+
+	_, err := c.Object.Put(context.Background(), name, f, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	name = "test/put_option.go"
+	f = strings.NewReader("test xxx")
+	opt := &cos.ObjectPutOptions{
+		ObjectPutHeaderOptions: &cos.ObjectPutHeaderOptions{
+			ContentType: "text/html",
+		},
+		ACLHeaderOptions: &cos.ACLHeaderOptions{
+			//XCosACL: "public-read",
+			XCosACL: "private",
+		},
+	}
+	_, err = c.Object.Put(context.Background(), name, f, opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/putACL.go
+++ b/example/object/putACL.go
@ -0,0 +1,64 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	opt := &cos.ObjectPutACLOptions{
+		Header: &cos.ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+	name := "test/hello.txt"
+	_, err := c.Object.PutACL(context.Background(), name, opt)
+	if err != nil {
+		panic(err)
+	}
+
+	// with body
+	opt = &cos.ObjectPutACLOptions{
+		Body: &cos.ACLXml{
+			Owner: &cos.Owner{
+				ID: "qcs::cam::uin/100000760461:uin/100000760461",
+			},
+			AccessControlList: []cos.ACLGrant{
+				{
+					Grantee: &cos.ACLGrantee{
+						Type: "RootAccount",
+						ID:   "qcs::cam::uin/100000760461:uin/100000760461",
+					},
+
+					Permission: "FULL_CONTROL",
+				},
+			},
+		},
+	}
+
+	_, err = c.Object.PutACL(context.Background(), name, opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/uploadFile.go
+++ b/example/object/uploadFile.go
@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"net/url"
+	"os"
+
+	"net/http"
+
+	"fmt"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_Key"),
+			SecretKey: os.Getenv("COS_Secret"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    false,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/uploadFile.go"
+	f, err := os.Open(os.Args[0])
+	if err != nil {
+		panic(err)
+	}
+	s, err := f.Stat()
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(s.Size())
+	opt := &cos.ObjectPutOptions{
+		ObjectPutHeaderOptions: &cos.ObjectPutHeaderOptions{
+			ContentLength: int(s.Size()),
+		},
+	}
+	//opt.ContentLength = int(s.Size())
+
+	_, err = c.Object.Put(context.Background(), name, f, opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/object/uploadPart.go
+++ b/example/object/uploadPart.go
@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"net/url"
+	"strings"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func initUpload(c *cos.Client, name string) *cos.InitiateMultipartUploadResult {
+	v, _, err := c.Object.InitiateMultipartUpload(context.Background(), name, nil)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Printf("%#v\n", v)
+	return v
+}
+
+func main() {
+	u, _ := url.Parse("https://test-1253846586.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/test_multi_upload.go"
+	up := initUpload(c, name)
+	uploadID := up.UploadID
+
+	f := strings.NewReader("test heoo")
+	_, err := c.Object.UploadPart(
+		context.Background(), name, uploadID, 1, f, nil,
+	)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/service/get.go
+++ b/example/service/get.go
@ -0,0 +1,36 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"net/http"
+
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+)
+
+func main() {
+	c := cos.NewClient(nil, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:  os.Getenv("COS_SECRETID"),
+			SecretKey: os.Getenv("COS_SECRETKEY"),
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	s, _, err := c.Service.Get(context.Background())
+	if err != nil {
+		panic(err)
+	}
+
+	for _, b := range s.Buckets {
+		fmt.Printf("%#v\n", b)
+	}
+}
--- a/example/sts/sts.go
+++ b/example/sts/sts.go
@ -0,0 +1,101 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"github.com/QcloudApi/qcloud_sign_golang"
+	"github.com/tencentyun/cos-go-sdk-v5"
+	"github.com/tencentyun/cos-go-sdk-v5/debug"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+// Use Qcloud api github.com/QcloudApi/qcloud_sign_golang
+// doc https://cloud.tencent.com/document/product/436/14048
+type Credent struct {
+	SessionToken string `json:"sessionToken"`
+	TmpSecretID  string `json:"tmpSecretId"`
+	TmpSecretKey string `json:"tmpSecretKey"`
+}
+
+// Data data in sts response body
+type Data struct {
+	Credentials Credent `json:"credentials"`
+}
+
+// Response sts response body
+// In qcloud_sign_golang this response only return ak, sk and token
+type Response struct {
+	Dat Data `json:"data"`
+}
+
+func main() {
+	// 替换实际的 SecretId 和 SecretKey
+	secretID := "ak"
+	secretKey := "sk"
+
+	// 配置
+	config := map[string]interface{}{"secretId": secretID, "secretKey": secretKey, "debug": false}
+
+	// 请求参数
+	params := map[string]interface{}{"Region": "gz", "Action": "GetFederationToken", "name": "alantong", "policy": "{\"statement\": [{\"action\": [\"name/cos:GetObject\",\"name/cos:PutObject\"],\"effect\": \"allow\",\"resource\":[\"qcs::cos:ap-guangzhou:uid/1253960454:prefix//1253960454/alangz/*\"]}],\"version\": \"2.0\"}"}
+
+	// 发送请求
+	retData, err := QcloudApi.SendRequest("sts", params, config)
+	if err != nil {
+		fmt.Print("Error.", err)
+		return
+	}
+	r := &Response{}
+	err = json.Unmarshal([]byte(retData), r)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	//获取临时ak、sk、token
+	tAk := r.Dat.Credentials.TmpSecretID
+	tSk := r.Dat.Credentials.TmpSecretKey
+	token := r.Dat.Credentials.SessionToken
+
+	u, _ := url.Parse("https://alangz-1253960454.cos.ap-guangzhou.myqcloud.com")
+	b := &cos.BaseURL{BucketURL: u}
+	c := cos.NewClient(b, &http.Client{
+		Transport: &cos.AuthorizationTransport{
+			SecretID:     tAk,
+			SecretKey:    tSk,
+			SessionToken: token,
+			Transport: &debug.DebugRequestTransport{
+				RequestHeader:  true,
+				RequestBody:    true,
+				ResponseHeader: true,
+				ResponseBody:   true,
+			},
+		},
+	})
+
+	name := "test/objectPut.go"
+	f := strings.NewReader("test")
+
+	_, err = c.Object.Put(context.Background(), name, f, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	name = "test/put_option.go"
+	f = strings.NewReader("test xxx")
+	opt := &cos.ObjectPutOptions{
+		ObjectPutHeaderOptions: &cos.ObjectPutHeaderOptions{
+			ContentType: "text/html",
+		},
+		ACLHeaderOptions: &cos.ACLHeaderOptions{
+			//XCosACL: "public-read",
+			XCosACL: "private",
+		},
+	}
+	_, err = c.Object.Put(context.Background(), name, f, opt)
+	if err != nil {
+		panic(err)
+	}
+}
--- a/example/test.sh
+++ b/example/test.sh
@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+function run() {
+    go run "$@"
+
+    if [ $? -ne 0 ]
+    then
+        exit 3
+    fi
+}
+
+echo '###### service ####'
+run ./service/get.go
+
+
+echo '##### bucket ####'
+
+run ./bucket/delete.go
+run ./bucket/put.go
+run ./bucket/putACL.go
+run ./bucket/putCORS.go
+run ./bucket/putLifecycle.go
+run ./bucket/putTagging.go
+run ./bucket/get.go
+run ./bucket/getACL.go
+run ./bucket/getCORS.go
+run ./bucket/getLifecycle.go
+run ./bucket/getTagging.go
+run ./bucket/getLocation.go
+run ./bucket/head.go
+run ./bucket/listMultipartUploads.go
+run ./bucket/delete.go
+run ./bucket/deleteCORS.go
+run ./bucket/deleteLifecycle.go
+run ./bucket/deleteTagging.go
+
+
+echo '##### object ####'
+
+run ./bucket/putCORS.go
+run ./object/put.go
+run ./object/uploadFile.go
+run ./object/putACL.go
+run ./object/append.go
+run ./object/get.go
+run ./object/head.go
+run ./object/getAnonymous.go
+run ./object/getACL.go
+run ./object/listParts.go
+run ./object/options.go
+run ./object/initiateMultipartUpload.go
+run ./object/uploadPart.go
+run ./object/completeMultipartUpload.go
+run ./object/abortMultipartUpload.go
+run ./object/delete.go
+run ./object/deleteMultiple.go
+run ./object/copy.go
--- a/helper.go
+++ b/helper.go
@ -0,0 +1,85 @@
+package cos
+
+import (
+	"bytes"
+	"crypto/md5"
+	"crypto/sha1"
+	"fmt"
+	"net/http"
+)
+
+// 计算 md5 或 sha1 时的分块大小
+const calDigestBlockSize = 1024 * 1024 * 10
+
+func calMD5Digest(msg []byte) []byte {
+	// TODO: 分块计算,减少内存消耗
+	m := md5.New()
+	m.Write(msg)
+	return m.Sum(nil)
+}
+
+func calSHA1Digest(msg []byte) []byte {
+	// TODO: 分块计算,减少内存消耗
+	m := sha1.New()
+	m.Write(msg)
+	return m.Sum(nil)
+}
+
+// cloneRequest returns a clone of the provided *http.Request. The clone is a
+// shallow copy of the struct and its Header map.
+func cloneRequest(r *http.Request) *http.Request {
+	// shallow copy of the struct
+	r2 := new(http.Request)
+	*r2 = *r
+	// deep copy of the Header
+	r2.Header = make(http.Header, len(r.Header))
+	for k, s := range r.Header {
+		r2.Header[k] = append([]string(nil), s...)
+	}
+	return r2
+}
+
+// encodeURIComponent like same function in javascript
+//
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent
+//
+// http://www.ecma-international.org/ecma-262/6.0/#sec-uri-syntax-and-semantics
+func encodeURIComponent(s string) string {
+	var b bytes.Buffer
+	written := 0
+
+	for i, n := 0, len(s); i < n; i++ {
+		c := s[i]
+
+		switch c {
+		case '-', '_', '.', '!', '~', '*', '\'', '(', ')':
+			continue
+		default:
+			// Unreserved according to RFC 3986 sec 2.3
+			if 'a' <= c && c <= 'z' {
+
+				continue
+
+			}
+			if 'A' <= c && c <= 'Z' {
+
+				continue
+
+			}
+			if '0' <= c && c <= '9' {
+
+				continue
+			}
+		}
+
+		b.WriteString(s[written:i])
+		fmt.Fprintf(&b, "%%%02x", c)
+		written = i + 1
+	}
+
+	if written == 0 {
+		return s
+	}
+	b.WriteString(s[written:])
+	return b.String()
+}
--- a/helper_test.go
+++ b/helper_test.go
@ -0,0 +1,24 @@
+package cos
+
+import (
+	"fmt"
+	"testing"
+)
+
+func Test_calSHA1Digest(t *testing.T) {
+	want := "a94a8fe5ccb19ba61c4c0873d391e987982fbbd3"
+	got := fmt.Sprintf("%x", calSHA1Digest([]byte("test")))
+	if got != want {
+
+		t.Errorf("calSHA1Digest request sha1: %+v, want %+v", got, want)
+	}
+}
+
+func Test_calMD5Digest(t *testing.T) {
+	want := "098f6bcd4621d373cade4e832627b4f6"
+	got := fmt.Sprintf("%x", calMD5Digest([]byte("test")))
+	if got != want {
+
+		t.Errorf("calMD5Digest request md5: %+v, want %+v", got, want)
+	}
+}
--- a/object.go
+++ b/object.go
@ -0,0 +1,346 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+)
+
+// ObjectService ...
+//
+// Object 相关 API
+type ObjectService service
+
+// ObjectGetOptions ...
+type ObjectGetOptions struct {
+	ResponseContentType        string `url:"response-content-type,omitempty" header:"-"`
+	ResponseContentLanguage    string `url:"response-content-language,omitempty" header:"-"`
+	ResponseExpires            string `url:"response-expires,omitempty" header:"-"`
+	ResponseCacheControl       string `url:"response-cache-control,omitempty" header:"-"`
+	ResponseContentDisposition string `url:"response-content-disposition,omitempty" header:"-"`
+	ResponseContentEncoding    string `url:"response-content-encoding,omitempty" header:"-"`
+	Range                      string `url:"-" header:"Range,omitempty"`
+	IfModifiedSince            string `url:"-" header:"If-Modified-Since,omitempty"`
+}
+
+// Get Object 请求可以将一个文件（Object）下载至本地。
+// 该操作需要对目标 Object 具有读权限或目标 Object 对所有人都开放了读权限（公有读）。
+//
+// https://www.qcloud.com/document/product/436/7753
+func (s *ObjectService) Get(ctx context.Context, name string, opt *ObjectGetOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL:          s.client.BaseURL.BucketURL,
+		uri:              "/" + encodeURIComponent(name),
+		method:           http.MethodGet,
+		optQuery:         opt,
+		optHeader:        opt,
+		disableCloseBody: true,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// ObjectPutHeaderOptions ...
+type ObjectPutHeaderOptions struct {
+	CacheControl       string `header:"Cache-Control,omitempty" url:"-"`
+	ContentDisposition string `header:"Content-Disposition,omitempty" url:"-"`
+	ContentEncoding    string `header:"Content-Encoding,omitempty" url:"-"`
+	ContentType        string `header:"Content-Type,omitempty" url:"-"`
+	ContentLength      int    `header:"Content-Length,omitempty" url:"-"`
+	Expect             string `header:"Expect,omitempty" url:"-"`
+	Expires            string `header:"Expires,omitempty" url:"-"`
+	XCosContentSHA1    string `header:"x-cos-content-sha1,omitempty" url:"-"`
+	// 自定义的 x-cos-meta-* header
+	XCosMetaXXX      *http.Header `header:"x-cos-meta-*,omitempty" url:"-"`
+	XCosStorageClass string       `header:"x-cos-storage-class,omitempty" url:"-"`
+	// 可选值: Normal, Appendable
+	//XCosObjectType string `header:"x-cos-object-type,omitempty" url:"-"`
+}
+
+// ObjectPutOptions ...
+type ObjectPutOptions struct {
+	*ACLHeaderOptions       `header:",omitempty" url:"-" xml:"-"`
+	*ObjectPutHeaderOptions `header:",omitempty" url:"-" xml:"-"`
+}
+
+// Put Object请求可以将一个文件（Oject）上传至指定Bucket。
+//
+// 当 r 不是 bytes.Buffer/bytes.Reader/strings.Reader 时，必须指定 opt.ObjectPutHeaderOptions.ContentLength
+//
+// https://www.qcloud.com/document/product/436/7749
+func (s *ObjectService) Put(ctx context.Context, name string, r io.Reader, opt *ObjectPutOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/" + encodeURIComponent(name),
+		method:    http.MethodPut,
+		body:      r,
+		optHeader: opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// ObjectCopyHeaderOptions ...
+type ObjectCopyHeaderOptions struct {
+	XCosMetadataDirective           string `header:"x-cos-metadata-directive,omitempty" url:"-" xml:"-"`
+	XCosCopySourceIfModifiedSince   string `header:"x-cos-copy-source-If-Modified-Since,omitempty" url:"-" xml:"-"`
+	XCosCopySourceIfUnmodifiedSince string `header:"x-cos-copy-source-If-Unmodified-Since,omitempty" url:"-" xml:"-"`
+	XCosCopySourceIfMatch           string `header:"x-cos-copy-source-If-Match,omitempty" url:"-" xml:"-"`
+	XCosCopySourceIfNoneMatch       string `header:"x-cos-copy-source-If-None-Match,omitempty" url:"-" xml:"-"`
+	XCosStorageClass                string `header:"x-cos-storage-class,omitempty" url:"-" xml:"-"`
+	// 自定义的 x-cos-meta-* header
+	XCosMetaXXX    *http.Header `header:"x-cos-meta-*,omitempty" url:"-"`
+	XCosCopySource string       `header:"x-cos-copy-source" url:"-" xml:"-"`
+}
+
+// ObjectCopyOptions ...
+type ObjectCopyOptions struct {
+	*ObjectCopyHeaderOptions `header:",omitempty" url:"-" xml:"-"`
+	*ACLHeaderOptions        `header:",omitempty" url:"-" xml:"-"`
+}
+
+// ObjectCopyResult ...
+type ObjectCopyResult struct {
+	XMLName      xml.Name `xml:"CopyObjectResult"`
+	ETag         string   `xml:"ETag,omitempty"`
+	LastModified string   `xml:"LastModified,omitempty"`
+}
+
+// Copy ...
+// Put Object Copy 请求实现将一个文件从源路径复制到目标路径。建议文件大小 1M 到 5G，
+// 超过 5G 的文件请使用分块上传 Upload - Copy。在拷贝的过程中，文件元属性和 ACL 可以被修改。
+//
+// 用户可以通过该接口实现文件移动，文件重命名，修改文件属性和创建副本。
+//
+// 注意：在跨帐号复制的时候，需要先设置被复制文件的权限为公有读，或者对目标帐号赋权，同帐号则不需要。
+//
+// https://cloud.tencent.com/document/product/436/10881
+func (s *ObjectService) Copy(ctx context.Context, name, sourceURL string, opt *ObjectCopyOptions) (*ObjectCopyResult, *Response, error) {
+	var res ObjectCopyResult
+	if opt == nil {
+		opt = new(ObjectCopyOptions)
+	}
+	if opt.ObjectCopyHeaderOptions == nil {
+		opt.ObjectCopyHeaderOptions = new(ObjectCopyHeaderOptions)
+	}
+	opt.XCosCopySource = encodeURIComponent(sourceURL)
+
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/" + encodeURIComponent(name),
+		method:    http.MethodPut,
+		body:      nil,
+		optHeader: opt,
+		result:    &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// Delete Object请求可以将一个文件（Object）删除。
+//
+// https://www.qcloud.com/document/product/436/7743
+func (s *ObjectService) Delete(ctx context.Context, name string) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/" + encodeURIComponent(name),
+		method:  http.MethodDelete,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// ObjectHeadOptions ...
+type ObjectHeadOptions struct {
+	IfModifiedSince string `url:"-" header:"If-Modified-Since,omitempty"`
+}
+
+// Head Object请求可以取回对应Object的元数据，Head的权限与Get的权限一致
+//
+// https://www.qcloud.com/document/product/436/7745
+func (s *ObjectService) Head(ctx context.Context, name string, opt *ObjectHeadOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/" + encodeURIComponent(name),
+		method:    http.MethodHead,
+		optHeader: opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	if (resp.Header["X-Cos-Object-Type"] != nil && resp.Header["X-Cos-Object-Type"][0] == "appendable") {
+		resp.Header.Add("x-cos-next-append-position",resp.Header["Content-Length"][0])
+	}
+
+	return resp, err
+}
+
+// ObjectOptionsOptions ...
+type ObjectOptionsOptions struct {
+	Origin                      string `url:"-" header:"Origin"`
+	AccessControlRequestMethod  string `url:"-" header:"Access-Control-Request-Method"`
+	AccessControlRequestHeaders string `url:"-" header:"Access-Control-Request-Headers,omitempty"`
+}
+
+// Options Object请求实现跨域访问的预请求。即发出一个 OPTIONS 请求给服务器以确认是否可以进行跨域操作。
+//
+// 当CORS配置不存在时，请求返回403 Forbidden。
+//
+// https://www.qcloud.com/document/product/436/8288
+func (s *ObjectService) Options(ctx context.Context, name string, opt *ObjectOptionsOptions) (*Response, error) {
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/" + encodeURIComponent(name),
+		method:    http.MethodOptions,
+		optHeader: opt,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// Append ...
+//
+// Append请求可以将一个文件（Object）以分块追加的方式上传至 Bucket 中。使用Append Upload的文件必须事前被设定为Appendable。
+// 当Appendable的文件被执行Put Object的操作以后，文件被覆盖，属性改变为Normal。
+//
+// 文件属性可以在Head Object操作中被查询到，当您发起Head Object请求时，会返回自定义Header『x-cos-object-type』，该Header只有两个枚举值：Normal或者Appendable。
+//
+// 追加上传建议文件大小1M - 5G。如果position的值和当前Object的长度不致，COS会返回409错误。
+// 如果Append一个Normal的Object，COS会返回409 ObjectNotAppendable。
+//
+// Appendable的文件不可以被复制，不参与版本管理，不参与生命周期管理，不可跨区域复制。
+//
+// 当 r 不是 bytes.Buffer/bytes.Reader/strings.Reader 时，必须指定 opt.ObjectPutHeaderOptions.ContentLength
+//
+// https://www.qcloud.com/document/product/436/7741
+func (s *ObjectService) Append(ctx context.Context, name string, position int, r io.Reader, opt *ObjectPutOptions) (*Response, error) {
+	u := fmt.Sprintf("/%s?append&position=%d", encodeURIComponent(name), position)
+	if position != 0{
+		opt = nil
+	}
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       u,
+		method:    http.MethodPost,
+		optHeader: opt,
+		body:      r,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// ObjectDeleteMultiOptions ...
+type ObjectDeleteMultiOptions struct {
+	XMLName xml.Name `xml:"Delete" header:"-"`
+	Quiet   bool     `xml:"Quiet" header:"-"`
+	Objects []Object `xml:"Object" header:"-"`
+	//XCosSha1 string `xml:"-" header:"x-cos-sha1"`
+}
+
+// ObjectDeleteMultiResult ...
+type ObjectDeleteMultiResult struct {
+	XMLName        xml.Name `xml:"DeleteResult"`
+	DeletedObjects []Object `xml:"Deleted,omitempty"`
+	Errors         []struct {
+		Key     string
+		Code    string
+		Message string
+	} `xml:"Error,omitempty"`
+}
+
+// DeleteMulti ...
+//
+// Delete Multiple Object请求实现批量删除文件，最大支持单次删除1000个文件。
+// 对于返回结果，COS提供Verbose和Quiet两种结果模式。Verbose模式将返回每个Object的删除结果；
+// Quiet模式只返回报错的Object信息。
+//
+// 此请求必须携带x-cos-sha1用来校验Body的完整性。
+//
+// https://www.qcloud.com/document/product/436/8289
+func (s *ObjectService) DeleteMulti(ctx context.Context, opt *ObjectDeleteMultiOptions) (*ObjectDeleteMultiResult, *Response, error) {
+	var res ObjectDeleteMultiResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/?delete",
+		method:  http.MethodPost,
+		body:    opt,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// Object ...
+type Object struct {
+	Key          string `xml:",omitempty"`
+	ETag         string `xml:",omitempty"`
+	Size         int    `xml:",omitempty"`
+	PartNumber   int    `xml:",omitempty"`
+	LastModified string `xml:",omitempty"`
+	StorageClass string `xml:",omitempty"`
+	Owner        *Owner `xml:",omitempty"`
+}
+
+type MultiUploadOptions struct {
+	OptIni *InitiateMultipartUploadOptions
+	PartSize int
+}
+
+// MultiUpload 为高级upload接口，并发分块上传
+//
+// 需要指定分块大小 partSize >= 1 ,单位为MB
+// 同时请确认分块数量不超过10000
+//
+
+func (s *ObjectService) MultiUpload(ctx context.Context, name string, r io.Reader, opt *MultiUploadOptions) (*CompleteMultipartUploadResult, *Response, error) {
+	
+	optini := opt.OptIni
+	res, _, err := s.InitiateMultipartUpload(ctx, name, optini)
+	if err != nil{panic(err)}
+	uploadID := res.UploadID
+ 	bufSize := opt.PartSize *  1024 *1024
+ 	buffer := make([]byte,bufSize)  
+	optcom := &CompleteMultipartUploadOptions{}
+	
+	PartUpload := func(ch chan *Response, ctx context.Context, name string, uploadId string, partNumber int, data io.Reader, opt *ObjectUploadPartOptions) {
+		
+    defer func(){
+			if err := recover(); err != nil {
+				fmt.Println(err)
+			}
+		}()
+		resp, err := s.UploadPart(context.Background(), name, uploadId, partNumber, data, nil)
+		if err!=nil{
+			panic(err)
+		}
+		ch <- resp
+	}
+	
+	chs := make([]chan *Response, 10000)
+	PartNumber := 0 
+    for i := 1 ;true; i++ { 
+        bytesread,err := r.Read(buffer)  
+        if err != nil {  
+            if err != io.EOF {  
+                panic(err)
+			} 
+			PartNumber = i
+            break  
+		}  
+		chs[i] = make(chan *Response)
+		go PartUpload(chs[i], context.Background(), name, uploadID, i, strings.NewReader(string(buffer[:bytesread])), nil)
+	}
+
+	for  i := 1; i < PartNumber; i++ { 
+		resp := <-chs[i]
+		etag := resp.Header.Get("ETag")
+		optcom.Parts = append(optcom.Parts, Object{
+			PartNumber: i, ETag: etag},
+		)
+	}
+
+	v, resp, err := s.CompleteMultipartUpload(context.Background(), name, uploadID, optcom)
+
+	return v, resp, err
+}
--- a/object_acl.go
+++ b/object_acl.go
@ -0,0 +1,63 @@
+package cos
+
+import (
+	"context"
+	"net/http"
+)
+
+// ObjectGetACLResult ...
+type ObjectGetACLResult ACLXml
+
+// GetACL Get Object ACL接口实现使用API读取Object的ACL表，只有所有者有权操作。
+//
+// https://www.qcloud.com/document/product/436/7744
+func (s *ObjectService) GetACL(ctx context.Context, name string) (*ObjectGetACLResult, *Response, error) {
+	var res ObjectGetACLResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     "/" + encodeURIComponent(name) + "?acl",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// ObjectPutACLOptions ...
+type ObjectPutACLOptions struct {
+	Header *ACLHeaderOptions `url:"-" xml:"-"`
+	Body   *ACLXml           `url:"-" header:"-"`
+}
+
+// PutACL 使用API写入Object的ACL表，您可以通过Header："x-cos-acl", "x-cos-grant-read" ,
+// "x-cos-grant-write" ,"x-cos-grant-full-control"传入ACL信息，
+// 也可以通过body以XML格式传入ACL信息，但是只能选择Header和Body其中一种，否则，返回冲突。
+//
+// Put Object ACL是一个覆盖操作，传入新的ACL将覆盖原有ACL。只有所有者有权操作。
+//
+// "x-cos-acl"：枚举值为public-read，private；public-read意味这个Object有公有读私有写的权限，
+// private意味这个Object有私有读写的权限。
+//
+// "x-cos-grant-read"：意味被赋予权限的用户拥有该Object的读权限
+//
+// "x-cos-grant-write"：意味被赋予权限的用户拥有该Object的写权限
+//
+// "x-cos-grant-full-control"：意味被赋予权限的用户拥有该Object的读写权限
+//
+// https://www.qcloud.com/document/product/436/7748
+func (s *ObjectService) PutACL(ctx context.Context, name string, opt *ObjectPutACLOptions) (*Response, error) {
+	header := opt.Header
+	body := opt.Body
+	if body != nil {
+		header = nil
+	}
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/" + encodeURIComponent(name) + "?acl",
+		method:    http.MethodPut,
+		optHeader: header,
+		body:      body,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
--- a/object_acl_test.go
+++ b/object_acl_test.go
@ -0,0 +1,174 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestObjectService_GetACL(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		vs := values{
+			"acl": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<AccessControlPolicy>
+	<Owner>
+		<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+		<DisplayName>qcs::cam::uin/100000760461:uin/100000760461</DisplayName>
+	</Owner>
+	<AccessControlList>
+		<Grant>
+			<Grantee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="RootAccount">
+				<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+				<DisplayName>qcs::cam::uin/100000760461:uin/100000760461</DisplayName>
+			</Grantee>
+			<Permission>FULL_CONTROL</Permission>
+		</Grant>
+		<Grant>
+			<Grantee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="RootAccount">
+				<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+				<DisplayName>qcs::cam::uin/100000760461:uin/100000760461</DisplayName>
+			</Grantee>
+			<Permission>READ</Permission>
+		</Grant>
+	</AccessControlList>
+</AccessControlPolicy>`)
+	})
+
+	ref, _, err := client.Object.GetACL(context.Background(), name)
+	if err != nil {
+		t.Fatalf("Object.GetACL returned error: %v", err)
+	}
+
+	want := &ObjectGetACLResult{
+		XMLName: xml.Name{Local: "AccessControlPolicy"},
+		Owner: &Owner{
+			ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+			DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+		},
+		AccessControlList: []ACLGrant{
+			{
+				Grantee: &ACLGrantee{
+					Type:        "RootAccount",
+					ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+					DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+				},
+				Permission: "FULL_CONTROL",
+			},
+			{
+				Grantee: &ACLGrantee{
+					Type:        "RootAccount",
+					ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+					DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+				},
+				Permission: "READ",
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.GetACL returned %+v, want %+v", ref, want)
+	}
+}
+
+func TestObjectService_PutACL_with_header_opt(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &ObjectPutACLOptions{
+		Header: &ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"acl": "",
+		}
+		testFormValues(t, r, vs)
+		testHeader(t, r, "x-cos-acl", "private")
+
+		want := 0
+		v, _ := r.Body.Read([]byte{})
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Object.PutACL request body: %#v, want %#v", v, want)
+		}
+	})
+
+	_, err := client.Object.PutACL(context.Background(), name, opt)
+	if err != nil {
+		t.Fatalf("Object.PutACL returned error: %v", err)
+	}
+
+}
+
+func TestObjectService_PutACL_with_body_opt(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &ObjectPutACLOptions{
+		Body: &ACLXml{
+			Owner: &Owner{
+				ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+				DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+			},
+			AccessControlList: []ACLGrant{
+				{
+					Grantee: &ACLGrantee{
+						Type:        "RootAccount",
+						ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+						DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+					},
+
+					Permission: "FULL_CONTROL",
+				},
+				{
+					Grantee: &ACLGrantee{
+						Type:        "RootAccount",
+						ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+						DisplayName: "qcs::cam::uin/100000760461:uin/100000760461",
+					},
+					Permission: "READ",
+				},
+			},
+		},
+	}
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		v := new(ACLXml)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"acl": "",
+		}
+		testFormValues(t, r, vs)
+		testHeader(t, r, "x-cos-acl", "")
+
+		want := opt.Body
+		want.XMLName = xml.Name{Local: "AccessControlPolicy"}
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Object.PutACL request body: %+v, want %+v", v, want)
+		}
+
+	})
+
+	_, err := client.Object.PutACL(context.Background(), name, opt)
+	if err != nil {
+		t.Fatalf("Object.PutACL returned error: %v", err)
+	}
+
+}
--- a/object_part.go
+++ b/object_part.go
@ -0,0 +1,178 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+// InitiateMultipartUploadOptions ...
+type InitiateMultipartUploadOptions struct {
+	*ACLHeaderOptions
+	*ObjectPutHeaderOptions
+}
+
+// InitiateMultipartUploadResult ...
+type InitiateMultipartUploadResult struct {
+	XMLName  xml.Name `xml:"InitiateMultipartUploadResult"`
+	Bucket   string
+	Key      string
+	UploadID string `xml:"UploadId"`
+}
+
+// InitiateMultipartUpload ...
+//
+// Initiate Multipart Upload请求实现初始化分片上传，成功执行此请求以后会返回Upload ID用于后续的Upload Part请求。
+//
+// https://www.qcloud.com/document/product/436/7746
+func (s *ObjectService) InitiateMultipartUpload(ctx context.Context, name string, opt *InitiateMultipartUploadOptions) (*InitiateMultipartUploadResult, *Response, error) {
+	var res InitiateMultipartUploadResult
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       "/" + encodeURIComponent(name) + "?uploads",
+		method:    http.MethodPost,
+		optHeader: opt,
+		result:    &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// ObjectUploadPartOptions ...
+type ObjectUploadPartOptions struct {
+	Expect          string `header:"Expect,omitempty" url:"-"`
+	XCosContentSHA1 string `header:"x-cos-content-sha1" url:"-"`
+	ContentLength   int    `header:"Content-Length,omitempty" url:"-"`
+}
+
+
+// UploadPart ...
+//
+// Upload Part请求实现在初始化以后的分块上传，支持的块的数量为1到10000，块的大小为1 MB 到5 GB。
+// 在每次请求Upload Part时候，需要携带partNumber和uploadID，partNumber为块的编号，支持乱序上传。
+//
+// 当传入uploadID和partNumber都相同的时候，后传入的块将覆盖之前传入的块。当uploadID不存在时会返回404错误，NoSuchUpload.
+//
+// 当 r 不是 bytes.Buffer/bytes.Reader/strings.Reader 时，必须指定 opt.ContentLength
+//
+// https://www.qcloud.com/document/product/436/7750
+func (s *ObjectService) UploadPart(ctx context.Context, name, uploadID string, partNumber int, r io.Reader, opt *ObjectUploadPartOptions) (*Response, error) {
+	u := fmt.Sprintf("/%s?partNumber=%d&uploadId=%s", encodeURIComponent(name), partNumber, uploadID)
+	sendOpt := sendOptions{
+		baseURL:   s.client.BaseURL.BucketURL,
+		uri:       u,
+		method:    http.MethodPut,
+		optHeader: opt,
+		body:      r,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
+
+// ObjectListPartsOptions ...
+type ObjectListPartsOptions struct {
+	EncodingType     string `url:"Encoding-type,omitempty"`
+	MaxParts         int    `url:"max-parts,omitempty"`
+	PartNumberMarker int    `url:"part-number-marker,omitempty"`
+}
+
+// ObjectListPartsResult ...
+type ObjectListPartsResult struct {
+	XMLName              xml.Name `xml:"ListPartsResult"`
+	Bucket               string
+	EncodingType         string `xml:"Encoding-type,omitempty"`
+	Key                  string
+	UploadID             string     `xml:"UploadId"`
+	Initiator            *Initiator `xml:"Initiator,omitempty"`
+	Owner                *Owner     `xml:"Owner,omitempty"`
+	StorageClass         string
+	PartNumberMarker     int
+	NextPartNumberMarker int `xml:"NextPartNumberMarker,omitempty"`
+	MaxParts             int
+	IsTruncated          bool
+	Parts                []Object `xml:"Part,omitempty"`
+}
+
+// ListParts ...
+//
+// List Parts用来查询特定分块上传中的已上传的块。
+//
+// https://www.qcloud.com/document/product/436/7747
+func (s *ObjectService) ListParts(ctx context.Context, name, uploadID string) (*ObjectListPartsResult, *Response, error) {
+	u := fmt.Sprintf("/%s?uploadId=%s", encodeURIComponent(name), uploadID)
+	var res ObjectListPartsResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     u,
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// CompleteMultipartUploadOptions ...
+type CompleteMultipartUploadOptions struct {
+	XMLName xml.Name `xml:"CompleteMultipartUpload"`
+	Parts   []Object `xml:"Part"`
+}
+
+// CompleteMultipartUploadResult ...
+type CompleteMultipartUploadResult struct {
+	XMLName  xml.Name `xml:"CompleteMultipartUploadResult"`
+	Location string
+	Bucket   string
+	Key      string
+	ETag     string
+}
+
+// CompleteMultipartUpload ...
+//
+// Complete Multipart Upload用来实现完成整个分块上传。当您已经使用Upload Parts上传所有块以后，你可以用该API完成上传。
+// 在使用该API时，您必须在Body中给出每一个块的PartNumber和ETag，用来校验块的准确性。
+//
+// 由于分块上传的合并需要数分钟时间，因而当合并分块开始的时候，COS就立即返回200的状态码，在合并的过程中，
+// COS会周期性的返回空格信息来保持连接活跃，直到合并完成，COS会在Body中返回合并后块的内容。
+//
+// 当上传块小于1 MB的时候，在调用该请求时，会返回400 EntityTooSmall；
+// 当上传块编号不连续的时候，在调用该请求时，会返回400 InvalidPart；
+// 当请求Body中的块信息没有按序号从小到大排列的时候，在调用该请求时，会返回400 InvalidPartOrder；
+// 当UploadId不存在的时候，在调用该请求时，会返回404 NoSuchUpload。
+//
+// 建议您及时完成分块上传或者舍弃分块上传，因为已上传但是未终止的块会占用存储空间进而产生存储费用。
+//
+// https://www.qcloud.com/document/product/436/7742
+func (s *ObjectService) CompleteMultipartUpload(ctx context.Context, name, uploadID string, opt *CompleteMultipartUploadOptions) (*CompleteMultipartUploadResult, *Response, error) {
+	u := fmt.Sprintf("/%s?uploadId=%s", encodeURIComponent(name), uploadID)
+	var res CompleteMultipartUploadResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     u,
+		method:  http.MethodPost,
+		body:    opt,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
+
+// AbortMultipartUpload ...
+//
+// Abort Multipart Upload用来实现舍弃一个分块上传并删除已上传的块。当您调用Abort Multipart Upload时，
+// 如果有正在使用这个Upload Parts上传块的请求，则Upload Parts会返回失败。当该UploadID不存在时，会返回404 NoSuchUpload。
+//
+// 建议您及时完成分块上传或者舍弃分块上传，因为已上传但是未终止的块会占用存储空间进而产生存储费用。
+//
+// https://www.qcloud.com/document/product/436/7740
+func (s *ObjectService) AbortMultipartUpload(ctx context.Context, name, uploadID string) (*Response, error) {
+	u := fmt.Sprintf("/%s?uploadId=%s", encodeURIComponent(name), uploadID)
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.BucketURL,
+		uri:     u,
+		method:  http.MethodDelete,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return resp, err
+}
--- a/object_part_test.go
+++ b/object_part_test.go
@ -0,0 +1,273 @@
+package cos
+
+import (
+	"bytes"
+	"context"
+	"encoding/xml"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestObjectService_AbortMultipartUpload(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+	uploadID := "xxxxaabcc"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodDelete)
+		vs := values{
+			"uploadId": uploadID,
+		}
+		testFormValues(t, r, vs)
+
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Object.AbortMultipartUpload(context.Background(),
+		name, uploadID)
+	if err != nil {
+		t.Fatalf("Object.AbortMultipartUpload returned error: %v", err)
+	}
+}
+
+func TestObjectService_InitiateMultipartUpload(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &InitiateMultipartUploadOptions{
+		ObjectPutHeaderOptions: &ObjectPutHeaderOptions{
+			ContentType: "text/html",
+		},
+		ACLHeaderOptions: &ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		v := new(BucketPutTaggingOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodPost)
+		testHeader(t, r, "x-cos-acl", "private")
+		testHeader(t, r, "Content-Type", "text/html")
+		vs := values{
+			"uploads": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<InitiateMultipartUploadResult>
+	<Bucket>test-1253846586</Bucket>
+	<Key>test/hello.txt</Key>
+	<UploadId>149795166761115ef06e259b2fceb8ff34bf7dd840883d26a0f90243562dd398efa41718db</UploadId>
+</InitiateMultipartUploadResult>`)
+	})
+
+	ref, _, err := client.Object.InitiateMultipartUpload(context.Background(),
+		name, opt)
+	if err != nil {
+		t.Fatalf("Object.InitiateMultipartUpload returned error: %v", err)
+	}
+
+	want := &InitiateMultipartUploadResult{
+		XMLName:  xml.Name{Local: "InitiateMultipartUploadResult"},
+		Bucket:   "test-1253846586",
+		Key:      "test/hello.txt",
+		UploadID: "149795166761115ef06e259b2fceb8ff34bf7dd840883d26a0f90243562dd398efa41718db",
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.InitiateMultipartUpload returned %+v, want %+v", ref, want)
+	}
+}
+
+func TestObjectService_UploadPart(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &ObjectUploadPartOptions{}
+	name := "test/hello.txt"
+	uploadID := "xxxxx"
+	partNumber := 1
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodPut)
+		vs := values{
+			"uploadId":   uploadID,
+			"partNumber": "1",
+		}
+		testFormValues(t, r, vs)
+
+		b, _ := ioutil.ReadAll(r.Body)
+		v := string(b)
+		want := "hello"
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Object.UploadPart request body: %#v, want %#v", v, want)
+		}
+	})
+
+	r := bytes.NewReader([]byte("hello"))
+	_, err := client.Object.UploadPart(context.Background(),
+		name, uploadID, partNumber, r, opt)
+	if err != nil {
+		t.Fatalf("Object.UploadPart returned error: %v", err)
+	}
+
+}
+
+func TestObjectService_ListParts(t *testing.T) {
+	setup()
+	defer teardown()
+
+	name := "test/hello.txt"
+	uploadID := "149795194893578fd83aceef3a88f708f81f00e879fda5ea8a80bf15aba52746d42d512387"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		v := new(BucketPutTaggingOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodGet)
+		vs := values{
+			"uploadId": uploadID,
+		}
+		testFormValues(t, r, vs)
+
+		fmt.Fprint(w, `<ListPartsResult>
+	<Bucket>test-1253846586</Bucket>
+	<Encoding-type/>
+	<Key>test/hello.txt</Key>
+	<UploadId>149795194893578fd83aceef3a88f708f81f00e879fda5ea8a80bf15aba52746d42d512387</UploadId>
+	<Owner>
+		<ID>1253846586</ID>
+		<DisplayName>1253846586</DisplayName>
+	</Owner>
+	<PartNumberMarker>0</PartNumberMarker>
+	<Initiator>
+		<ID>qcs::cam::uin/100000760461:uin/100000760461</ID>
+		<DisplayName>100000760461</DisplayName>
+	</Initiator>
+	<Part>
+		<PartNumber>1</PartNumber>
+		<LastModified>2017-06-20T09:45:49.000Z</LastModified>
+		<ETag>&quot;fae3dba15f4d9b2d76cbaed5de3a08e3&quot;</ETag>
+		<Size>6291456</Size>
+	</Part>
+	<Part>
+		<PartNumber>2</PartNumber>
+		<LastModified>2017-06-20T09:45:50.000Z</LastModified>
+		<ETag>&quot;c81982550f2f965118d486176d9541d4&quot;</ETag>
+		<Size>6391456</Size>
+	</Part>
+	<StorageClass>Standard</StorageClass>
+	<MaxParts>1000</MaxParts>
+	<IsTruncated>false</IsTruncated>
+</ListPartsResult>`)
+	})
+
+	ref, _, err := client.Object.ListParts(context.Background(),
+		name, uploadID)
+	if err != nil {
+		t.Fatalf("Object.ListParts returned error: %v", err)
+	}
+
+	want := &ObjectListPartsResult{
+		XMLName:  xml.Name{Local: "ListPartsResult"},
+		Bucket:   "test-1253846586",
+		UploadID: uploadID,
+		Key:      name,
+		Owner: &Owner{
+			ID:          "1253846586",
+			DisplayName: "1253846586",
+		},
+		PartNumberMarker: 0,
+		Initiator: &Initiator{
+			ID:          "qcs::cam::uin/100000760461:uin/100000760461",
+			DisplayName: "100000760461",
+		},
+		Parts: []Object{
+			{
+				PartNumber:   1,
+				LastModified: "2017-06-20T09:45:49.000Z",
+				ETag:         "\"fae3dba15f4d9b2d76cbaed5de3a08e3\"",
+				Size:         6291456,
+			},
+			{
+				PartNumber:   2,
+				LastModified: "2017-06-20T09:45:50.000Z",
+				ETag:         "\"c81982550f2f965118d486176d9541d4\"",
+				Size:         6391456,
+			},
+		},
+		StorageClass: "Standard",
+		MaxParts:     1000,
+		IsTruncated:  false,
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.ListParts returned \n%#v, want \n%#v", ref, want)
+	}
+}
+
+func TestObjectService_CompleteMultipartUpload(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+	uploadID := "149795194893578fd83aceef3a88f708f81f00e879fda5ea8a80bf15aba52746d42d512387"
+
+	opt := &CompleteMultipartUploadOptions{
+		Parts: []Object{
+			{
+				PartNumber: 1,
+				ETag:       "\"fae3dba15f4d9b2d76cbaed5de3a08e3\"",
+			},
+			{
+				PartNumber: 2,
+				ETag:       "\"c81982550f2f965118d486176d9541d4\"",
+			},
+		},
+	}
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		v := new(CompleteMultipartUploadOptions)
+		xml.NewDecoder(r.Body).Decode(v)
+
+		testMethod(t, r, http.MethodPost)
+		vs := values{
+			"uploadId": uploadID,
+		}
+		testFormValues(t, r, vs)
+
+		want := opt
+		want.XMLName = xml.Name{Local: "CompleteMultipartUpload"}
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Object.CompleteMultipartUpload request body: %+v, want %+v", v, want)
+		}
+		fmt.Fprint(w, `<CompleteMultipartUploadResult>
+	<Location>test-1253846586.cos.ap-guangzhou.myqcloud.com/test/hello.txt</Location>
+	<Bucket>test</Bucket>
+	<Key>test/hello.txt</Key>
+	<ETag>&quot;594f98b11c6901c0f0683de1085a6d0e-4&quot;</ETag>
+</CompleteMultipartUploadResult>`)
+	})
+
+	ref, _, err := client.Object.CompleteMultipartUpload(context.Background(),
+		name, uploadID, opt)
+	if err != nil {
+		t.Fatalf("Object.ListParts returned error: %v", err)
+	}
+
+	want := &CompleteMultipartUploadResult{
+		XMLName:  xml.Name{Local: "CompleteMultipartUploadResult"},
+		Bucket:   "test",
+		Key:      name,
+		ETag:     "\"594f98b11c6901c0f0683de1085a6d0e-4\"",
+		Location: "test-1253846586.cos.ap-guangzhou.myqcloud.com/test/hello.txt",
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.CompleteMultipartUpload returned \n%#v, want \n%#v", ref, want)
+	}
+}
--- a/object_test.go
+++ b/object_test.go
@ -0,0 +1,274 @@
+package cos
+
+import (
+	"bytes"
+	"context"
+	"encoding/xml"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestObjectService_Get(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		vs := values{
+			"response-content-type": "text/html",
+		}
+		testFormValues(t, r, vs)
+		testHeader(t, r, "Range", "bytes=0-3")
+		fmt.Fprint(w, `hello`)
+	})
+
+	opt := &ObjectGetOptions{
+		ResponseContentType: "text/html",
+		Range:               "bytes=0-3",
+	}
+
+	resp, err := client.Object.Get(context.Background(), name, opt)
+	if err != nil {
+		t.Fatalf("Object.Get returned error: %v", err)
+	}
+
+	b, _ := ioutil.ReadAll(resp.Body)
+	ref := string(b)
+	want := "hello"
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.Get returned %+v, want %+v", ref, want)
+	}
+
+}
+
+func TestObjectService_Put(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &ObjectPutOptions{
+		ObjectPutHeaderOptions: &ObjectPutHeaderOptions{
+			ContentType: "text/html",
+		},
+		ACLHeaderOptions: &ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodPut)
+		testHeader(t, r, "x-cos-acl", "private")
+		testHeader(t, r, "Content-Type", "text/html")
+
+		b, _ := ioutil.ReadAll(r.Body)
+		v := string(b)
+		want := "hello"
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Object.Put request body: %#v, want %#v", v, want)
+		}
+	})
+
+	r := bytes.NewReader([]byte("hello"))
+	_, err := client.Object.Put(context.Background(), name, r, opt)
+	if err != nil {
+		t.Fatalf("Object.Put returned error: %v", err)
+	}
+
+}
+
+func TestObjectService_Delete(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodDelete)
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	_, err := client.Object.Delete(context.Background(), name)
+	if err != nil {
+		t.Fatalf("Object.Delete returned error: %v", err)
+	}
+}
+
+func TestObjectService_Head(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "HEAD")
+		testHeader(t, r, "If-Modified-Since", "Mon, 12 Jun 2017 05:36:19 GMT")
+	})
+
+	opt := &ObjectHeadOptions{
+		IfModifiedSince: "Mon, 12 Jun 2017 05:36:19 GMT",
+	}
+
+	_, err := client.Object.Head(context.Background(), name, opt)
+	if err != nil {
+		t.Fatalf("Object.Head returned error: %v", err)
+	}
+
+}
+
+func TestObjectService_Options(t *testing.T) {
+	setup()
+	defer teardown()
+	name := "test/hello.txt"
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodOptions)
+		testHeader(t, r, "Access-Control-Request-Method", "PUT")
+		testHeader(t, r, "Origin", "www.qq.com")
+	})
+
+	opt := &ObjectOptionsOptions{
+		Origin: "www.qq.com",
+		AccessControlRequestMethod: "PUT",
+	}
+
+	_, err := client.Object.Options(context.Background(), name, opt)
+	if err != nil {
+		t.Fatalf("Object.Options returned error: %v", err)
+	}
+
+}
+
+func TestObjectService_Append(t *testing.T) {
+	setup()
+	defer teardown()
+
+	opt := &ObjectPutOptions{
+		ObjectPutHeaderOptions: &ObjectPutHeaderOptions{
+			ContentType: "text/html",
+		},
+		ACLHeaderOptions: &ACLHeaderOptions{
+			XCosACL: "private",
+		},
+	}
+	name := "test/hello.txt"
+	position := 0
+
+	mux.HandleFunc("/test/hello.txt", func(w http.ResponseWriter, r *http.Request) {
+		vs := values{
+			"append":   "",
+			"position": "0",
+		}
+		testFormValues(t, r, vs)
+
+		testMethod(t, r, http.MethodPost)
+		testHeader(t, r, "x-cos-acl", "private")
+		testHeader(t, r, "Content-Type", "text/html")
+
+		b, _ := ioutil.ReadAll(r.Body)
+		v := string(b)
+		want := "hello"
+		if !reflect.DeepEqual(v, want) {
+			t.Errorf("Object.Append request body: %#v, want %#v", v, want)
+		}
+	})
+
+	r := bytes.NewReader([]byte("hello"))
+	_, err := client.Object.Append(context.Background(), name, position, r, opt)
+	if err != nil {
+		t.Fatalf("Object.Append returned error: %v", err)
+	}
+}
+
+func TestObjectService_DeleteMulti(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodPost)
+		vs := values{
+			"delete": "",
+		}
+		testFormValues(t, r, vs)
+		fmt.Fprint(w, `<DeleteResult>
+	<Deleted>
+		<Key>test1</Key>
+	</Deleted>
+	<Deleted>
+		<Key>test3</Key>
+	</Deleted>
+	<Deleted>
+		<Key>test2</Key>
+	</Deleted>
+</DeleteResult>`)
+	})
+
+	opt := &ObjectDeleteMultiOptions{
+		Objects: []Object{
+			{
+				Key: "test1",
+			},
+			{
+				Key: "test3",
+			},
+			{
+				Key: "test2",
+			},
+		},
+	}
+
+	ref, _, err := client.Object.DeleteMulti(context.Background(), opt)
+	if err != nil {
+		t.Fatalf("Object.DeleteMulti returned error: %v", err)
+	}
+
+	want := &ObjectDeleteMultiResult{
+		XMLName: xml.Name{Local: "DeleteResult"},
+		DeletedObjects: []Object{
+			{
+				Key: "test1",
+			},
+			{
+				Key: "test3",
+			},
+			{
+				Key: "test2",
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.DeleteMulti returned %+v, want %+v", ref, want)
+	}
+
+}
+
+func TestObjectService_Copy(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/test.go.copy", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, http.MethodPut)
+		fmt.Fprint(w, `<CopyObjectResult>
+		<ETag>"098f6bcd4621d373cade4e832627b4f6"</ETag>
+		<LastModified>2017-12-13T14:53:12</LastModified>
+	</CopyObjectResult>`)
+	})
+
+	sourceURL := "test-1253846586.cos.ap-guangzhou.myqcloud.com/test.source"
+	ref, _, err := client.Object.Copy(context.Background(), "test.go.copy", sourceURL, nil)
+	if err != nil {
+		t.Fatalf("Object.Copy returned error: %v", err)
+	}
+
+	want := &ObjectCopyResult{
+		XMLName:      xml.Name{Local: "CopyObjectResult"},
+		ETag:         `"098f6bcd4621d373cade4e832627b4f6"`,
+		LastModified: "2017-12-13T14:53:12",
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Object.Copy returned %+v, want %+v", ref, want)
+	}
+}
--- a/service.go
+++ b/service.go
@ -0,0 +1,37 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"net/http"
+)
+
+// ServiceService ...
+//
+// Service 相关 API
+type ServiceService service
+
+// ServiceGetResult ...
+type ServiceGetResult struct {
+	XMLName xml.Name `xml:"ListAllMyBucketsResult"`
+	Owner   *Owner   `xml:"Owner"`
+	Buckets []Bucket `xml:"Buckets>Bucket,omitempty"`
+}
+
+// Get Service 接口实现获取该用户下所有Bucket列表。
+//
+// 该API接口需要使用Authorization签名认证，
+// 且只能获取签名中AccessID所属账户的Bucket列表。
+//
+// https://www.qcloud.com/document/product/436/8291
+func (s *ServiceService) Get(ctx context.Context) (*ServiceGetResult, *Response, error) {
+	var res ServiceGetResult
+	sendOpt := sendOptions{
+		baseURL: s.client.BaseURL.ServiceURL,
+		uri:     "/",
+		method:  http.MethodGet,
+		result:  &res,
+	}
+	resp, err := s.client.send(ctx, &sendOpt)
+	return &res, resp, err
+}
--- a/service_test.go
+++ b/service_test.go
@ -0,0 +1,66 @@
+package cos
+
+import (
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"reflect"
+	"testing"
+)
+
+func TestServiceService_Get(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		fmt.Fprint(w, `<ListAllMyBucketsResult>
+	<Owner>
+		<ID>xbaccxx</ID>
+		<DisplayName>100000760461</DisplayName>
+	</Owner>
+	<Buckets>
+		<Bucket>
+			<Name>huadong-1253846586</Name>
+			<Location>ap-shanghai</Location>
+			<CreationDate>2017-06-16T13:08:28Z</CreationDate>
+		</Bucket>
+		<Bucket>
+			<Name>huanan-1253846586</Name>
+			<Location>ap-guangzhou</Location>
+			<CreationDate>2017-06-10T09:00:07Z</CreationDate>
+		</Bucket>
+	</Buckets>
+</ListAllMyBucketsResult>`)
+	})
+
+	ref, _, err := client.Service.Get(context.Background())
+	if err != nil {
+		t.Fatalf("Service.Get returned error: %v", err)
+	}
+
+	want := &ServiceGetResult{
+		XMLName: xml.Name{Local: "ListAllMyBucketsResult"},
+		Owner: &Owner{
+			ID:          "xbaccxx",
+			DisplayName: "100000760461",
+		},
+		Buckets: []Bucket{
+			{
+				Name:       "huadong-1253846586",
+				Region:     "ap-shanghai",
+				CreationDate: "2017-06-16T13:08:28Z",
+			},
+			{
+				Name:       "huanan-1253846586",
+				Region:     "ap-guangzhou",
+				CreationDate: "2017-06-10T09:00:07Z",
+			},
+		},
+	}
+
+	if !reflect.DeepEqual(ref, want) {
+		t.Errorf("Service.Get returned %+v, want %+v", ref, want)
+	}
+}