Obtaining Download Progresses

If you have any questions during development, post them on the Issues page of GitHub. For details about parameters and usage of each API, see the API Reference.

You can call GetObjectRequest.setProgressInterval to configure the data transmission interface to obtain download progresses.

This example downloads objectname from bucketname and uses ProgressInterval to monitor the download progress.

The example code is as follows:

// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY_ID.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
String ak = System.getenv("ACCESS_KEY_ID");
String sk = System.getenv("SECRET_ACCESS_KEY_ID");
String endPoint = "https://your-endpoint";
// Create an instance of ObsClient.
final ObsClient obsClient = new ObsClient(ak, sk, endPoint);

GetObjectRequest request = new GetObjectRequest("bucketname", "objectname");
request.setProgressListener(new ProgressListener() {
       
       @Override
       public void progressChanged(ProgressStatus status) {
              // Obtain the average download rate.
              Log.i("GetObject", "AverageSpeed:" + status.getAverageSpeed());
              // Obtain the download progress in percentage.
              Log.i("GetObject", "TransferPercentage:" + status.getTransferPercentage());
       }
});
// Refresh the upload progress each time 1 MB data is uploaded.
request.setProgressInterval(1024 * 1024L);
ObsObject obsObject = obsClient.getObject(request);

// Obtain the object content.
System.out.println("Object content:");
InputStream input = obsObject.getObjectContent();
byte[] b = new byte[1024];
ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
int len;
while ((len=input.read(b)) != -1){
       bos.write(b, 0, len);
}
 
System.out.println(new String(bos.toByteArray()));
bos.close();
input.close();

• You can obtain the download progress when downloading an object in streaming, partial, or resumable mode.