Have you considered OAuth 2 <http://oauth.net/2/>? It's simpler and easier to implement.
To implement OAuth 1.0, I recommend you use some existing software. You'll find several alternatives at http://oauth.net/code/ I recommend you experiment with Google's OAuth playground<http://googlecodesamples.com/oauth_playground/>to see examples of correct requests. I noticed some errors in the code ritesh posted. The oauth_signature value is incorrect: it should be computed from the private key and all the other request parameters. This computation is complex and difficult to implement correctly. Also, the datastring is incorrect: me.getKey() and me.getValue() should be URL encoded. --
