(Xojo Plugin) WhatsApp - Send a Previously Uploaded Media Message

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

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

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim http As New Chilkat.Http
Dim success As Boolean

// 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"
//   }
// }

Dim json As New Chilkat.JsonObject
success = json.UpdateString("recipient_type","individual-or-group")
success = json.UpdateString("to","whatsapp-id-or-group-id")
success = json.UpdateString("type","image")
success = json.UpdateString("image.id","your-media-id")
success = json.UpdateString("image.caption","your-image-caption")

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

Dim resp As Chilkat.HttpResponse
resp = http.PostJson3("https://example.com/v1/messages","application/json",json)
If (http.LastMethodSuccess = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

Dim sbResponseBody As New Chilkat.StringBuilder
success = resp.GetBodySb(sbResponseBody)
Dim jResp As New Chilkat.JsonObject
success = jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

System.DebugLog("Response Body:")
System.DebugLog(jResp.Emit())

Dim respStatusCode As Int32
respStatusCode = resp.StatusCode
System.DebugLog("Response Status Code = " + Str(respStatusCode))
If (respStatusCode >= 400) Then
    System.DebugLog("Response Header:")
    System.DebugLog(resp.Header)
    System.DebugLog("Failed.")

    Return
End If

// 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

Dim id As String

Dim i As Int32
i = 0
Dim count_i As Int32
count_i = jResp.SizeOfArray("messages")
While i < count_i
    jResp.I = i
    id = jResp.StringOf("messages[i].id")
    i = i + 1
Wend