VB.NET Requires Chilkat v11.0.0+

Twitter - Application Only Authentication

Demonstrates how to get a Twitter OAuth2 token for application-only authentication.

This example is deprecated and no longer valid.

VB.NET

Dim success As Boolean = False

'  It requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  Note: Define your Twitter apps at https://apps.twitter.com/

'  We're going to send an HTTPS POST that looks like this:

'  POST /oauth2/token HTTP/1.1
'  Host: api.twitter.com
'  User-Agent: My Twitter App v1.0.23
'  Authorization: Basic eHZ6MWV2RlM0d0VFUFRHRUZQSEJvZzpMOHFxOVBaeVJn
'                       NmllS0dFS2hab2xHQzB2SldMdzhpRUo4OERSZHlPZw==
'  Content-Type: application/x-www-form-urlencoded;charset=UTF-8
'  Content-Length: 29
'  Accept-Encoding: gzip
'  
'  grant_type=client_credentials

'  Update these values with your consumer key and secret (also known as API key and API secret).
Dim consumerKey As String = "TWITTER_CONSUMER_KEY"
Dim consumerSecret As String = "TWITTER_CONSUMER_SECRET"

Dim http As New Chilkat.Http

http.BasicAuth = True
http.Login = consumerKey
http.Password = consumerSecret

Dim req As New Chilkat.HttpRequest
req.AddParam("grant_type","client_credentials")

req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

Dim resp As New Chilkat.HttpResponse
success = http.HttpReq("https://api.twitter.com/oauth2/token",req,resp)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Response Status Code: " & resp.StatusCode)

If (resp.StatusCode <> 200) Then
    Debug.WriteLine("Expected a 200 response status code for success.")
    Debug.WriteLine(resp.BodyStr)
    Exit Sub
End If


'  We should get a JSON response like this:

'  {
'      "token_type":"bearer",
'      "access_token":"..."
'  }

Dim json As New Chilkat.JsonObject
json.Load(resp.BodyStr)

Debug.WriteLine("Access token = " & json.StringOf("access_token"))