C#

WhatsApp - Send a Previously Uploaded Media Message

Demonstrates how to send a media message where the media content was previously uploaded. C#

bool success = false;

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

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

//  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": {
//       "id": "your-media-id",
//        "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": {
//      "id": "your-media-id",
//      "caption": "your-image-caption"
//    }
//  }

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("recipient_type","individual-or-group");
json.UpdateString("to","whatsapp-id-or-group-id");
json.UpdateString("type","image");
json.UpdateString("image.id","your-media-id");
json.UpdateString("image.caption","your-image-caption");

//  Adds the "Authorization: Bearer your-auth-token" header.
http.AuthToken = "your-auth-token";

Chilkat.HttpResponse resp = new Chilkat.HttpResponse();
success = http.HttpJson("POST","https://example.com/v1/messages",json,"application/json",resp);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
resp.GetBodySb(sbResponseBody);
Chilkat.JsonObject jResp = new Chilkat.JsonObject();
jResp.LoadSb(sbResponseBody);
jResp.EmitCompact = false;

Debug.WriteLine("Response Body:");
Debug.WriteLine(jResp.Emit());

int respStatusCode = resp.StatusCode;
Debug.WriteLine("Response Status Code = " + Convert.ToString(respStatusCode));
if (respStatusCode >= 400) {
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(resp.Header);
    Debug.WriteLine("Failed.");
    return;
}

//  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

string id;

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