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(Android™) Adding x-ms-range header to Azure Blob Download

See more Azure Cloud Storage Examples

Demonstrates how to add an x-ms-range header to an Azure blob download.

For more information, see https://docs.microsoft.com/en-us/rest/api/storageservices/get-blob

Chilkat Android™ Downloads

Android™ Java Libraries

Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRest rest = new CkRest();

    // Connect to the Azure Storage Blob Service
    boolean bTls = true;
    int port = 443;
    boolean bAutoReconnect = true;
    // In this example, the storage account name is "chilkat".
    boolean success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect);
    if (success != true) {
        Log.i(TAG, rest.lastErrorText());
        return;
        }

    // Provide Azure Cloud credentials for the REST call.
    CkAuthAzureStorage azAuth = new CkAuthAzureStorage();
    azAuth.put_AccessKey("AZURE_ACCESS_KEY");
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    azAuth.put_Account("chilkat");
    azAuth.put_Scheme("SharedKey");
    azAuth.put_Service("Blob");
    // This causes the "x-ms-version: 2020-08-04" header to be automatically added.
    azAuth.put_XMsVersion("2020-08-04");
    success = rest.SetAuthAzureStorage(azAuth);

    // Note: The application does not need to explicitly set the following
    // headers: Content-Length, x-ms-date, Authorization.  These headers
    // are automatically set by Chilkat.

    // Add the x-ms-range header.
    // See x-ms-range Header Format
    // The file we're downloading contains "Hello World!", so we'll download just the "World!" part..
    rest.AddHeader("x-ms-range","bytes=6-");

    // The Azure blob container is "test", the file is "helloWorld.txt"
    CkStringBuilder sb = new CkStringBuilder();
    success = rest.FullRequestNoBodySb("GET","/test/helloWorld.txt",sb);
    if (success == false) {
        // Examine the request/response to see what happened.
        Log.i(TAG, "response status code = " + String.valueOf(rest.get_ResponseStatusCode()));
        Log.i(TAG, "response status text = " + rest.responseStatusText());
        Log.i(TAG, "response header: " + rest.responseHeader());
        Log.i(TAG, "---");
        Log.i(TAG, "LastRequestStartLine: " + rest.lastRequestStartLine());
        Log.i(TAG, "LastRequestHeader: " + rest.lastRequestHeader());
        return;
        }

    Log.i(TAG, sb.getAsString());

    Log.i(TAG, "Success.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}

 

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