下载对象

功能说明

下载指定桶中的对象。

方法定义

func (obsClient ObsClient) GetObject(input *GetObjectInput) (output *GetObjectOutput, err error)

使用带授权信息URL的方法定义

func (obsClient ObsClient) GetObjectWithSignedUrl(signedUrl string, actualSignedRequestHeaders http.Header) (output *GetObjectOutput, err error)

请求参数

返回结果

代码样例

• 下载对象：

  func main() {
         input := &obs.GetObjectInput{}
         input.Bucket = "bucketname"
         input.Key = "objectkey"
         output, err := obsClient.GetObject(input)
         if err == nil {
                defer output.Body.Close()
                fmt.Printf("RequestId:%s\n", output.RequestId)
                fmt.Printf("StorageClass:%s, ETag:%s, ContentType:%s, ContentLength:%d, LastModified:%s\n",
                       output.StorageClass, output.ETag, output.ContentType, output.ContentLength, output.LastModified)
                p := make([]byte, 1024)
                var readErr error
                var readCount int
                for {
                       readCount, readErr = output.Body.Read(p)
                       if readCount > 0 {
                             fmt.Printf("%s", p[:readCount])
                       }
                       if readErr != nil {
                             break
                       }
                }
         } else {
                if obsError, ok := err.(obs.ObsError); ok {
                       fmt.Println(obsError.Code)
                       fmt.Println(obsError.Message)
                } else {
                       fmt.Println(err)
                }
         }
  }

• 下载对象并保存到本地：

  func main() {
         input := &obs.GetObjectInput{}
         input.Bucket = "bucketname"
         input.Key = "objectkey"
         output, err := obsClient.GetObject(input)
         if err == nil {
                defer output.Body.Close()
                fmt.Printf("RequestId:%s\n", output.RequestId)
                fmt.Printf("StorageClass:%s, ETag:%s, ContentType:%s, ContentLength:%d, LastModified:%s\n",
                       output.StorageClass, output.ETag, output.ContentType, output.ContentLength, output.LastModified)
                p, err := ioutil.ReadAll(output.Body)
                if err == nil {   
                    ioutil.WriteFile("***your file path***", p, os.ModeAppend);
                }
  
         } else {
                if obsError, ok := err.(obs.ObsError); ok {
                       fmt.Println(obsError.Code)
                       fmt.Println(obsError.Message)
                } else {
                       fmt.Println(err)
                }
         }
  }