API Description

You can use this API to download an object in a specified bucket.

Method Definition

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

Method Definition If a Signed URL Is Used

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

Request Parameter

Returned Result

Sample Code

• Downloading an object:

  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)
                }
         }
  }

• Download an object and save it to the local PC:

  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)
                }
         }
  }