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

Chilkat.Http http = new Chilkat.Http();
bool success;

// 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.
http.AuthToken = "your-auth-token";

Chilkat.BinData bdResponseBody = new Chilkat.BinData();
success = http.QuickGetBd("https://your-webapp-hostname:your-webapp-port/v1/media/4b5bf27b-8672-4d55-bc21-d096dc200d0f",bdResponseBody);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

int respStatusCode = http.LastStatus;
Debug.WriteLine("response status code = " + Convert.ToString(respStatusCode));
Debug.WriteLine("response header = " + http.LastResponseHeader);

if (respStatusCode != 200) {
    Debug.WriteLine("Error response body:");
    Debug.WriteLine(bdResponseBody.GetString("utf-8"));
    return;
}

success = bdResponseBody.WriteFile("path/filename");