(C) WhatsApp - Download/Retrieve Media

Demonstrates how to download media previously uploaded to the WhatsApp Business API client

For more information, see https://developers.facebook.com/docs/whatsapp/api/media#retrieve

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#include <C_CkHttp.h>
#include <C_CkBinData.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkBinData bdResponseBody;
    int respStatusCode;

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

    http = CkHttp_Create();

    // Implements the following CURL command:

    // curl -X GET \
    //   https://your-webapp-hostname:your-webapp-port/v1/media/4b5bf27b-8672-4d55-bc21-d096dc200d0f \
    //   -H 'Authorization: Bearer your-auth-token' \
    //   -o path/filename

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Adds the "Authorization: Bearer your-auth-token" header.
    CkHttp_putAuthToken(http,"your-auth-token");

    bdResponseBody = CkBinData_Create();
    success = CkHttp_QuickGetBd(http,"https://your-webapp-hostname:your-webapp-port/v1/media/4b5bf27b-8672-4d55-bc21-d096dc200d0f",bdResponseBody);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bdResponseBody);
        return;
    }

    respStatusCode = CkHttp_getLastStatus(http);
    printf("response status code = %d\n",respStatusCode);
    printf("response header = %s\n",CkHttp_lastResponseHeader(http));

    if (respStatusCode != 200) {
        printf("Error response body:\n");
        printf("%s\n",CkBinData_getString(bdResponseBody,"utf-8"));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bdResponseBody);
        return;
    }

    success = CkBinData_WriteFile(bdResponseBody,"path/filename");


    CkHttp_Dispose(http);
    CkBinData_Dispose(bdResponseBody);

    }