fix the example of get, reorder the import package

.travis.yml

@@ -9,13 +9,15 @@ go:
 - master
 sudo: false
 before_install:
-- go get github.com/mattn/goveralls
-- go get github.com/stretchr/testify
+- go get -u github.com/mattn/goveralls
+- go get -u github.com/stretchr/testify
 install:
 - go get
 - go build
 - go build github.com/mattn/goveralls
 script:
+- if [[ ! -n "$COS_SECRETID" ]]; then exit 0
+  ; fi
 - make test
 - make ci-test
 - go test -coverprofile=cover.out github.com/toranger/cos-go-sdk-v5

example/object/get.go

@@ -3,13 +3,11 @@ package main
 import (
 	"context"
 	"fmt"
-	"net/url"
-	"os"
-
 	"io"
 	"io/ioutil"
-
 	"net/http"
+	"net/url"
+	"os"
 
 	"github.com/tencentyun/cos-go-sdk-v5"
 	"github.com/tencentyun/cos-go-sdk-v5/debug"
@@ -55,7 +53,7 @@ func main() {
 	resp.Body.Close()
 
 	// Case3 Download object to local file path
-	err = c.Object.GetToFile(context.Background(), name, "hello_1.txt", nil)
+	_, err = c.Object.GetToFile(context.Background(), name, "hello_1.txt", nil)
 	if err != nil {
 		panic(err)
 	}