(MFC) WhatsApp - Send a Linked Media Message

Demonstrates how to send a media message where the media content is a link to an external URL. This example demonstrates sending an image (JPG) media message.

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

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkHttpResponse.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;
    bool success;

    // Implements the following CURL command:

    // curl -X POST https://example.com/v1/messages \
    //   -H "Authorization: Bearer your-auth-token" \
    //   -d '
    // {
    //     "recipient_type": "individual-or-group",
    //     "to": "whatsapp-id-or-group-id",
    //     "type": "image",
    //     "image": {
    //       "link": "http(s)://the-url",
    //       "provider": {
    //         "name" : "provider-name"
    //       },
    //     "caption": "your-image-caption"
    //   }
    // }'

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

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "recipient_type": "individual-or-group",
    //   "to": "whatsapp-id-or-group-id",
    //   "type": "image",
    //   "image": {
    //     "link": "http(s)://the-url",
    //     "provider": {
    //       "name": "provider-name"
    //     },
    //     "caption": "your-image-caption"
    //   }
    // }

    CkJsonObject json;
    json.UpdateString("recipient_type","individual-or-group");
    json.UpdateString("to","whatsapp-id-or-group-id");
    json.UpdateString("type","image");
    json.UpdateString("image.link","http(s)://the-url");
    json.UpdateString("image.provider.name","provider-name");
    json.UpdateString("image.caption","your-image-caption");

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

    CkHttpResponse *resp = http.PostJson3("https://example.com/v1/messages","application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkStringBuilder sbResponseBody;
    resp->GetBodySb(sbResponseBody);
    CkJsonObject jResp;
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    strOut.append("Response Body:");
    strOut.append("\r\n");
    strOut.append(jResp.emit());
    strOut.append("\r\n");

    int respStatusCode = resp->get_StatusCode();
    strOut.append("Response Status Code = ");
    strOut.appendInt(respStatusCode);
    strOut.append("\r\n");
    if (respStatusCode >= 400) {
        strOut.append("Response Header:");
        strOut.append("\r\n");
        strOut.append(resp->header());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        delete resp;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    delete resp;

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "messages": [
    //     {
    //       "id": "gBEGkYiEB1VXAglK1ZEqA1YKPrU"
    //     }
    //   ]
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    const char *id = 0;

    int i = 0;
    int count_i = jResp.SizeOfArray("messages");
    while (i < count_i) {
        jResp.put_I(i);
        id = jResp.stringOf("messages[i].id");
        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }