(VB.NET) 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

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' 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 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"

Dim bdResponseBody As New Chilkat.BinData
success = http.QuickGetBd("https://your-webapp-hostname:your-webapp-port/v1/media/4b5bf27b-8672-4d55-bc21-d096dc200d0f",bdResponseBody)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If

Dim respStatusCode As Integer = http.LastStatus
Debug.WriteLine("response status code = " & respStatusCode)
Debug.WriteLine("response header = " & http.LastResponseHeader)

If (respStatusCode <> 200) Then
    Debug.WriteLine("Error response body:")
    Debug.WriteLine(bdResponseBody.GetString("utf-8"))
    Exit Sub
End If

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