cos-go-sdk-v5/example/CI/ci_watermark.go

package main

import (
	"context"
	"encoding/base64"
	"fmt"
	"net/http"
	"net/url"
	"os"

	"github.com/tencentyun/cos-go-sdk-v5"
	"github.com/tencentyun/cos-go-sdk-v5/debug"
)

func log_status(err error) {
	if err == nil {
		return
	}
	if cos.IsNotFoundError(err) {
		// WARN
		fmt.Println("WARN: Resource is not existed")
	} else if e, ok := cos.IsCOSError(err); ok {
		fmt.Printf("ERROR: Code: %v\n", e.Code)
		fmt.Printf("ERROR: Message: %v\n", e.Message)
		fmt.Printf("ERROR: Resource: %v\n", e.Resource)
		fmt.Printf("ERROR: RequestId: %v\n", e.RequestID)
		// ERROR
	} else {
		fmt.Printf("ERROR: %v\n", err)
		// ERROR
	}
}

func main() {
	u, _ := url.Parse("https://test-1259654469.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,
				// Notice when put a large file and set need the request body, might happend out of memory error.
				RequestBody:    false,
				ResponseHeader: true,
				ResponseBody:   false,
			},
		},
	})

	// 上传时添加盲水印
	opt := &cos.ObjectPutOptions{
		nil,
		&cos.ObjectPutHeaderOptions{
			XOptionHeader: &http.Header{},
		},
	}
	pic := &cos.PicOperations{
		IsPicInfo: 1,
		Rules: []cos.PicOperationsRules{
			{
				FileId: "format.jpg",
				Rule:   "watermark/3/type/3/text/" + base64.StdEncoding.EncodeToString([]byte("testwatermark")),
			},
		},
	}
	opt.XOptionHeader.Add("Pic-Operations", cos.EncodePicOperations(pic))
	name := "test.jpg"
	local_filename := "./test.jpg"
	res, _, err := c.CI.PutFromFile(context.Background(), name, local_filename, opt)
	log_status(err)
	fmt.Printf("%+v\n", res)

	// 下载时添加盲水印
	name = "test.jpg"
	filepath := "watermark.jpg"
	_, err = c.CI.GetToFile(context.Background(), name, filepath, "watermark/3/type/3/text/"+base64.StdEncoding.EncodeToString([]byte("testwatermark")), nil)

	// 提取盲水印
	opt = &cos.ObjectPutOptions{
		nil,
		&cos.ObjectPutHeaderOptions{
			XOptionHeader: &http.Header{},
		},
	}
	pic = &cos.PicOperations{
		IsPicInfo: 1,
		Rules: []cos.PicOperationsRules{
			{
				FileId: "format2.jpg",
				Rule:   "watermark/4/type/3/text/" + base64.StdEncoding.EncodeToString([]byte("testwatermark")),
			},
		},
	}
	opt.XOptionHeader.Add("Pic-Operations", cos.EncodePicOperations(pic))
	name = "test2.jpg"
	_, err = c.Object.PutFromFile(context.Background(), name, filepath, opt)
	log_status(err)
}