title: Doing a POST request to twitter
body: <p>I'm having problem creating the POST request (to tweet) in twitter.
  I dont want to use any library.
  I have all the oauth required parameters but still unable to do a valid request
  when i'm doing </p>
  
  <pre><code>curl "https://api.twitter.com/1/statuses/update.json?oauth_signature=NCs%2B1unOYZQW%2BNCTmsRwmiqtrZQ%3D&amp;oauth_version=1.0&amp;oauth_nonce=-619997894&amp;oauth_signature_method=HMAC-SHA1&amp;oauth_consumer_key=gGrr4khdilkzano8gYxK4Q&amp;oauth_token=146439820-n07FzSB78bDWEUzPPP9WZnwdnwW917FyJi1gwKWM&amp;oauth_timestamp=1341309839" -d 'status=hello'
  </code></pre>
  
  <p>then i'm getting 
  "Could not authenticate you.","request":"/1/statuses/update.json"</p>
  
  <p>I know that the OAuth parameters are right coz i'm able to do GET request like</p>
  
  <pre><code>https://api.twitter.com/1/statuses/public_timeline.json?oauth_signature=NCs%2B1unOYZQW%2BNCTmsRwmiqtrZQ%3D&amp;oauth_version=1.0&amp;oauth_nonce=-619997894&amp;oauth_signature_method=HMAC-SHA1&amp;oauth_consumer_key=gGrr4khdilkzano8gYxK4Q&amp;oauth_token=146439820-n07FzSB78bDWEUzPPP9WZnwdnwW917FyJi1gwKWM&amp;oauth_timestamp=1341309839
  </code></pre>
  
  <p>and its working just fine.
  So please help me to resolve the issue.</p>