(Lianja) 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This example is deprecated and no longer valid.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).
lcConsumerKey = "TWITTER_CONSUMER_KEY"
lcConsumerSecret = "TWITTER_CONSUMER_SECRET"

loHttp = createobject("CkHttp")

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

loReq = createobject("CkHttpRequest")
loReq.AddParam("grant_type","client_credentials")

loResp = loHttp.PostUrlEncoded("https://api.twitter.com/oauth2/token",loReq)
if (loHttp.LastMethodSuccess <> .T.) then
    ? loHttp.LastErrorText
    release loHttp
    release loReq
    return
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
    return
endif

// We should get a JSON response like this:

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

loJson = createobject("CkJsonObject")
loJson.Load(loResp.BodyStr)

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

release loResp


release loHttp
release loReq
release loJson