Visual FoxPro 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This example is deprecated and no longer valid.

Visual FoxPro

LOCAL lnSuccess
LOCAL lcConsumerKey
LOCAL lcConsumerSecret
LOCAL loHttp
LOCAL loReq
LOCAL loResp
LOCAL loJson

lnSuccess = 0

*  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).
lcConsumerKey = "TWITTER_CONSUMER_KEY"
lcConsumerSecret = "TWITTER_CONSUMER_SECRET"

loHttp = CreateObject('Chilkat.Http')

loHttp.BasicAuth = 1
loHttp.Login = lcConsumerKey
loHttp.Password = lcConsumerSecret

loReq = CreateObject('Chilkat.HttpRequest')
loReq.AddParam("grant_type","client_credentials")

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

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpReq("https://api.twitter.com/oauth2/token",loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

? "Response Status Code: " + STR(loResp.StatusCode)

IF (loResp.StatusCode <> 200) THEN
    ? "Expected a 200 response status code for success."
    ? loResp.BodyStr
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

*  We should get a JSON response like this:

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

loJson = CreateObject('Chilkat.JsonObject')
loJson.Load(loResp.BodyStr)

? "Access token = " + loJson.StringOf("access_token")

RELEASE loHttp
RELEASE loReq
RELEASE loResp
RELEASE loJson