POST /oauth/request_token HTTP/1.1
Authorization: OAuth
    oauth_consumer_key="pkr...8pw"
    oauth_nonce="1309284646"
    oauth_signature="qWh...aY%3D"
    oauth_signature_method="HMAC-SHA1"
    oauth_timestamp="1309284646"
    oauth_version="1.0"
Content-Length: 142
Content-Type: application/x-www-form-urlencoded
Host: api.twitter.com
Keep-Alive: 115
User-Agent: InetCheck

oauth_consumer_key=pkr...8pw
oauth_nonce=1309284646
oauth_signature_method=HMAC-SHA1
oauth_timestamp=1309284646
oauth_version=1.0