C++

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. C++

#include <CkRest.h>
#include <CkAuthAzureStorage.h>

void ChilkatSample(void)
    {
    bool success = false;

    // 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.

    CkRest rest;

    // Connect to the Azure Storage Blob Service
    bool bTls = true;
    int port = 443;
    bool bAutoReconnect = true;
    // In this example, the storage account name is "chilkat".
    success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // Provide Azure Cloud credentials for the REST call.
    CkAuthAzureStorage azAuth;
    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: 2021-08-06" header to be automatically added.
    azAuth.put_XMsVersion("2021-08-06");
    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 no response body.
    // In this example, we are getting the metadata of the container named "mycontainer".
    const char *responseStr = rest.fullRequestNoBody("GET","/mycontainer?restype=container&comp=metadata");
    if (rest.get_LastMethodSuccess() != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

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

    if (rest.get_ResponseStatusCode() != 200) {
        // Examine the request/response to see what happened.
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body (if any): " << responseStr << "\r\n";
        std::cout << "---" << "\r\n";
        std::cout << "LastRequestStartLine: " << rest.lastRequestStartLine() << "\r\n";
        std::cout << "LastRequestHeader: " << rest.lastRequestHeader() << "\r\n";
        return;
    }

    // The user-defined metadata is located in the response header.
    // The full response header can be obtained like this:
    std::cout << "response header: " << rest.responseHeader() << "\r\n";
    std::cout << "--" << "\r\n";

    // Metadata headers begin with "x-ms-meta-"
    // Individual response header fields can be retrieved like this:
    std::cout << "x-ms-meta-Category: " << rest.responseHdrByName("x-ms-meta-Category") << "\r\n";
    std::cout << "x-ms-meta-Resolution: " << rest.responseHdrByName("x-ms-meta-Resolution") << "\r\n";

    std::cout << "Success." << "\r\n";
    }