Help Center> Object Storage Service> SDK Reference> Go> Objects-Related APIs> Processing an Image
View PDF

Processing an Image

API Description

You can use this API to process images in a stable, secure, efficient, easy to use, and cost-effective manner. If the object to be downloaded is an image, you can pass the image processing parameters to process the image, including cutting and resizing it as well as putting a watermark and converting the format.

For more information, see the Image Processing Feature Guide.

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 Parameters

Field

Type

Optional or Mandatory

input

*GetObjectInput

Mandatory

Returned Results

Field

Type

output

*GetObjectOutput

err

error

Sample Code

func main() {
       input := &obs.GetObjectInput{}
       input.Bucket = "bucketname"
       input.Key = "objectname"
       // Resize and rotate the image in sequence.
       input.ImageProcess = "image/resize,m_fixed,w_100,h_100/rotate,90"
       // Download an object.
       output, err := obsClient.GetObject(input)
       if err == nil {
              defer output.Body.Close()
              fmt.Printf("ETag:%s\n", output.ETag)
       } else if obsError, ok := err.(obs.ObsError); ok {
              fmt.Printf("Code:%s\n", obsError.Code)
              fmt.Printf("Message:%s\n", obsError.Message)
       }
}
  • Use GetObjectInput.ImageProcess to specify the image processing parameters.
  • Image processing parameters can be processed in cascading mode. This indicates that multiple commands can be performed on an image in sequence.
Parent topic: Objects-Related APIs