(Tcl) Twitter - Application Only Authentication

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

This example is deprecated and no longer valid.

Note: This example requires Chilkat v11.0.0 or greater.

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load ./chilkat.dll

set success 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).
set consumerKey "TWITTER_CONSUMER_KEY"
set consumerSecret "TWITTER_CONSUMER_SECRET"

set http [new_CkHttp]

CkHttp_put_BasicAuth $http 1
CkHttp_put_Login $http $consumerKey
CkHttp_put_Password $http $consumerSecret

set req [new_CkHttpRequest]

CkHttpRequest_AddParam $req "grant_type" "client_credentials"

CkHttpRequest_put_HttpVerb $req "POST"
CkHttpRequest_put_ContentType $req "application/x-www-form-urlencoded"

set resp [new_CkHttpResponse]

set success [CkHttp_HttpReq $http "https://api.twitter.com/oauth2/token" $req $resp]
if {$success == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkHttpRequest $req
    delete_CkHttpResponse $resp
    exit
}

puts "Response Status Code: [CkHttpResponse_get_StatusCode $resp]"

if {[CkHttpResponse_get_StatusCode $resp] != 200} then {
    puts "Expected a 200 response status code for success."
    puts [CkHttpResponse_bodyStr $resp]
    delete_CkHttp $http
    delete_CkHttpRequest $req
    delete_CkHttpResponse $resp
    exit
}

# We should get a JSON response like this:

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

set json [new_CkJsonObject]

CkJsonObject_Load $json [CkHttpResponse_bodyStr $resp]

puts "Access token = [CkJsonObject_stringOf $json access_token]"

delete_CkHttp $http
delete_CkHttpRequest $req
delete_CkHttpResponse $resp
delete_CkJsonObject $json