[HTTP] Status Codes
A successful request to the server results in a response, which is the message the server sends back to you, the client.The response from the server will contain a three-digit status code. These codes can start with a 1, 2, 3, 4, or 5, and each set of codes means something different. (You can read the full list in http://en.wikipedia.org/wiki/List_of_HTTP_status_codes). They work like this:1xx: ..