Since Apple's iTunes, APIs use GET requests to retrieve data. In this section, we will use the free http://httpbin.org service to show you how to make a POST request. The POST service that http://httpbin.org provides can be found at http://httpbin.org/post. This service will echo back the parameters that it receives so that we can verify that our request was made properly.
When we make a POST request, we generally have some data that we want to send or post to the server. This data takes the form of key/value pairs. These pairs are separated by an ampersand (
&) symbol, and each key is separated from its value by an equals sign (
=). As an example, let's say that we want to submit the following data to our service: