(Android™) Azure Storage: List Blobs

Azure Storage Blob Service REST API: Sample code to fetch the list of blobs in the specified container.

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);

    // Azure Blob Service Example: List the blobs in a specified container.
    // See also: https://msdn.microsoft.com/en-us/library/azure/dd135734.aspx

    // 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: x-ms-date, Authorization.  These headers
    // are automatically set by Chilkat.

    // The expected success response is a 200 response status code with an XML response body.
    // In this example, we are listing the blobs in the container named "mycontainer".
    String responseStr = rest.fullRequestNoBody("GET","/mycontainer?restype=container&comp=list");
    if (rest.get_LastMethodSuccess() != true) {
        Log.i(TAG, rest.lastErrorText());
        return;
        }

    // When successful, the Azure Storage service will respond with a 200 response status code,
    // with an XML response body.

    if (rest.get_ResponseStatusCode() != 200) {
        // 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, "response body (if any): " + responseStr);
        Log.i(TAG, "---");
        Log.i(TAG, "LastRequestStartLine: " + rest.lastRequestStartLine());
        Log.i(TAG, "LastRequestHeader: " + rest.lastRequestHeader());
        return;
        }

    // Load the XML response for parsing.
    // An example of the response XML is shown below.
    CkXml xml = new CkXml();
    success = xml.LoadXml(responseStr);

    Log.i(TAG, xml.getXml());

    // Let's iterate over the blobs...

    CkDateTime lastMod = new CkDateTime();

    int numBlobs = xml.NumChildrenAt("Blobs");
    int i = 0;
    while (i < numBlobs) {
        Log.i(TAG, "---- Blob " + String.valueOf(i) + " ----");
        xml.put_I(i);
        Log.i(TAG, "Name: " + xml.getChildContent("Blobs|Blob[i]|Name"));
        Log.i(TAG, "Content-Length: " + xml.getChildContent("Blobs|Blob[i]|Properties|Content-Length"));
        Log.i(TAG, "Content-Type: " + xml.getChildContent("Blobs|Blob[i]|Properties|Content-Type"));
        Log.i(TAG, "Content-MD5: " + xml.getChildContent("Blobs|Blob[i]|Properties|Content-MD5"));
        Log.i(TAG, "BlobType: " + xml.getChildContent("Blobs|Blob[i]|Properties|BlobType"));
        Log.i(TAG, "LeaseStatus: " + xml.getChildContent("Blobs|Blob[i]|Properties|LeaseStatus"));
        lastMod.SetFromRfc822(xml.getChildContent("Blobs|Blob[i]|Properties|Last-Modified"));
        CkDtObj dt = lastMod.GetDtObj(true);
        Log.i(TAG, "Last-Modified YMD: " + String.valueOf(dt.get_Year()) + "," + String.valueOf(dt.get_Month()) + ","
             + String.valueOf(dt.get_Day()));

        i = i + 1;
        }

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

    // Use the ChilkatPath method to get information for a specific blob:

    // For example, let's say we want the Last-Modified date/time for
    // the blob named "helloWorld.txt"
    String lastModStr = xml.chilkatPath("/C/Name,helloWorld.txt|..|Properties|Last-Modified|*");
    Log.i(TAG, "helloWorld.txt Last-Modified: " + lastModStr);

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

    // <?xml version="1.0" encoding="utf-8" ?>
    // <EnumerationResults ServiceEndpoint="https://chilkat.blob.core.windows.net/" ContainerName="test">
    //     <Blobs>
    //         <Blob>
    //             <Name>hamletC.xml</Name>
    //             <Properties>
    //                 <Last-Modified>Mon, 02 May 2016 23:50:30 GMT</Last-Modified>
    //                 <Etag>0x8D372E48B6D323A</Etag>
    //                 <Content-Length>279658</Content-Length>
    //                 <Content-Type>application/octet-stream</Content-Type>
    //                 <Content-Encoding />
    //                 <Content-Language />
    //                 <Content-MD5>4E6prI9haw81xadSLeEj3Q==</Content-MD5>
    //                 <Cache-Control />
    //                 <Content-Disposition>attachment; filename="hamletC.xml"</Content-Disposition>
    //                 <BlobType>BlockBlob</BlobType>
    //                 <LeaseStatus>unlocked</LeaseStatus>
    //                 <LeaseState>available</LeaseState>
    //             </Properties>
    //         </Blob>
    //         <Blob>
    //             <Name>helloWorld.txt</Name>
    //             <Properties>
    //                 <Last-Modified>Mon, 02 May 2016 15:21:55 GMT</Last-Modified>
    //                 <Etag>0x8D3729D7EE38299</Etag>
    //                 <Content-Length>12</Content-Length>
    //                 <Content-Type>application/octet-stream</Content-Type>
    //                 <Content-Encoding />
    //                 <Content-Language />
    //                 <Content-MD5>7Qdih1MuhjZehB6Sv8UNjA==</Content-MD5>
    //                 <Cache-Control />
    //                 <Content-Disposition>attachment; filename="helloWorld.txt"</Content-Disposition>
    //                 <BlobType>BlockBlob</BlobType>
    //                 <LeaseStatus>unlocked</LeaseStatus>
    //                 <LeaseState>available</LeaseState>
    //             </Properties>
    //         </Blob>
    //         <Blob>
    //             <Name>thisIsATest.txt</Name>
    //             <Properties>
    //                 <Last-Modified>Tue, 03 May 2016 00:22:13 GMT</Last-Modified>
    //                 <Etag>0x8D372E8F9B2A62E</Etag>
    //                 <Content-Length>1600</Content-Length>
    //                 <Content-Type>application/octet-stream</Content-Type>
    //                 <Content-Encoding />
    //                 <Content-Language />
    //                 <Content-MD5>FhgUXYfePg2ItsraPmz0Xg==</Content-MD5>
    //                 <Cache-Control />
    //                 <Content-Disposition>attachment; filename="thisIsATest.txt"</Content-Disposition>
    //                 <BlobType>BlockBlob</BlobType>
    //                 <LeaseStatus>unlocked</LeaseStatus>
    //                 <LeaseState>available</LeaseState>
    //             </Properties>
    //         </Blob>
    //     </Blobs>
    //     <NextMarker />
    // </EnumerationResults>
    // 

  }

  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."
  }
}