i suggest taking a look at http://hueniverse.com/2008/10/beginners-guide-to-oauth-part-iv-signing-requests/
as it has a pretty good walk through of how to construct the parameters. one point of note is that when the Content-Type of the request is -not- application/x-www-form-urlencoded, then the POST body should -not- be included as part of the signature. so, assuming you're using multi-part and the image is in the POST body, do not include it in the signature block. On Mon, Jan 11, 2010 at 8:30 PM, Vikram <vikram.prav...@gmail.com> wrote: > > > Yusuke, > > Can you please share with us the raw text of your request? I am not > familiar with Java. I am working with C++(.NET) > -- Raffi Krikorian Twitter Platform Team http://twitter.com/raffi