HTTProcessing is a small library that takes the pain out of doing HTTP requests in Processing. To download the library for use in your Processing sketch, download httprocessing.zip.

HTTProcessing is based on code by Chris Allick and Daniel Shiffman.

Simply clone this git repository into your Processing "libraries" folder, or use the download link to download the files to the same directory.

Then import the library in your sketch:

import httprocessing.*;

Then you can make GET and POST requests from your code:

GetRequest get = new GetRequest("http://httprocessing.heroku.com");
get.send();
println("Reponse Content: " + get.getContent());
println("Reponse Content-Length Header: " + get.getHeader("Content-Length"));

PostRequest post = new PostRequest("http://httprocessing.heroku.com");
post.addData("name", "Rune");
post.send();
println("Reponse Content: " + post.getContent());
println("Reponse Content-Length Header: " + post.getHeader("Content-Length"));

If you want to build the library (with javadocs, etc), run this from the git root folder:

ant

That will generate the necessary JAR file into "libraries".