By "post data" I mean the data that gets sent when you have method="post" on a HTML form tag.

Right now I can do wget --post-file=post.txt https://blah and get back some JSON data. I want to do the same thing in code (generate the contents for the form post data, retrieve the URL and then get the results back)

What is going on on the other end doesn't matter, I just need a library that the N900 can use that can retrieve this data for me easily.

libsoup is in the repos but it has HTTPS turned off so that's not an option.
Using OpenSSL directly looks too complicated. I just want a simple library that does the work for me without needing to care about the SSL connection, certificates, https or anything else.