Java

Get Container Metadata

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to get the user-defined metadata of a container. Chilkat2 Java

import com.chilkatsoft.chilkat2.AuthAzureStorage;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Rest;

public class ChilkatExample {

    public static void main(String[] args) {
        // Azure Blob Service Example: Get Container User-Defined Metadata
        // See also: https://msdn.microsoft.com/en-us/library/azure/ee691976.aspx

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

        Rest rest = new Rest();

        // 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".
        try {
            rest.connect("chilkat.blob.core.windows.net", port, bTls, bAutoReconnect);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Provide Azure Cloud credentials for the REST call.
        AuthAzureStorage azAuth = new AuthAzureStorage();
        azAuth.setAccessKey("AZURE_ACCESS_KEY");
        // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
        azAuth.setAccount("chilkat");
        azAuth.setScheme("SharedKey");
        azAuth.setService("Blob");
        // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
        azAuth.setXMsVersion("2021-08-06");
        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 no response body.
        // In this example, we are getting the metadata of the container named "mycontainer".
        String responseStr;
        try {
            responseStr = rest.fullRequestNoBody("GET", "/mycontainer?restype=container&comp=metadata");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // When successful, the Azure Storage service will respond with a 200 response status code,
        // with no response body.

        if (rest.getResponseStatusCode() != 200) {
            // Examine the request/response to see what happened.
            System.out.println("response status code = " + rest.getResponseStatusCode());
            System.out.println("response status text = " + rest.getResponseStatusText());
            System.out.println("response header: " + rest.getResponseHeader());
            System.out.println("response body (if any): " + responseStr);
            System.out.println("---");
            System.out.println("LastRequestStartLine: " + rest.getLastRequestStartLine());
            System.out.println("LastRequestHeader: " + rest.getLastRequestHeader());
            return;
        }

        // The user-defined metadata is located in the response header.
        // The full response header can be obtained like this:
        System.out.println("response header: " + rest.getResponseHeader());
        System.out.println("--");

        // Metadata headers begin with "x-ms-meta-"
        // Individual response header fields can be retrieved like this:
        System.out.println("x-ms-meta-Category: " + rest.responseHdrByName("x-ms-meta-Category"));
        System.out.println("x-ms-meta-Resolution: " + rest.responseHdrByName("x-ms-meta-Resolution"));

        System.out.println("Success.");
    }
}