(Xojo Plugin) Twitter - Application Only Authentication

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

This example is deprecated and no longer valid.

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// 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
consumerKey = "TWITTER_CONSUMER_KEY"
Dim consumerSecret As String
consumerSecret = "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"

Dim resp As Chilkat.HttpResponse
resp = http.PostUrlEncoded("https://api.twitter.com/oauth2/token",req)
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("Response Status Code: " + Str(resp.StatusCode))

If (resp.StatusCode <> 200) Then
    System.DebugLog("Expected a 200 response status code for success.")
    System.DebugLog(resp.BodyStr)
    Return
End If

// We should get a JSON response like this:

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

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

System.DebugLog("Access token = " + json.StringOf("access_token"))