Submit POST data from controller to another website in Rails

The simpliest way is using ruby core library:

require "uri"require "net/http"params = {'box1' => 'Nothing is less important than which fork you use. Etiquette is the science of living. It embraces everything. It is ethics. It is honor. -Emily Post','button1' => 'Submit'}x = Net::HTTP.post_form(URI.parse('http://www.interlacken.com/webdbdev/ch05/formpost.asp'), params)puts x.body

Pro Tip: Do an asynchronous request, using a gem like delayed_job or background_rb

Sorry, I neglected to mention that I was connecting to secure server. This seems to have been the reason that I was getting end of file errors. Adding using 'net/https' and calling use_ssl on connection solved the problem. Thanks for everyones help.

require 'net/https'require 'open-uri'url = URI.parse('https://MY_URL')req = Net::HTTP::Post.new(url.path)req.form_data = datareq.basic_auth url.user, url.password if url.usercon = Net::HTTP.new(url.host, url.port)con.use_ssl = truecon.start {|http| http.request(req)}    

This is based off the source for the post_form method, so i guess I'll give vlad.zloteanu the answer.

If the external server is RESTful, then simply create an ActiveResource model to handle your data.