The Basics of HTTP Jason Dean

About Me Web Application Developer with the Minnesota Department of Health (MDH)‏ Chairperson and User Group Manager of the MDH ColdFusion User Group Web Development Blogger ( Veteran of the U.S. Coast Guard

Overview

HTTP on the OSI Model

Resources

HTTP URL Basics :// : / ? # Example:

HTTP Messages

HTTP Message Flow

HTTP Message Parts

Requests Start LinePOST HTTP/1.1 Headers Host: http.12robots.com:81 Content-type: application/x-www-form-urlencoded Content-length: 10 BodymyID=12345

Request Methods GET OPTIONS PUT DELETE HEAD POST TRACE

Responses Start LineHTTP/ OK Headers Content-Type: text/html; charset=UTF-8 Connection: close Date: Sun, 01 Mar :55:05 GMT Server: Apache/ (Win32) JRun/4.0 Body My Page My POST Request Response The ID you passed in is:

Status Codes 404 Not Found 302 Found 301 Moved Permanently 403 Forbidden 401 Unauthorized 500 Internal Server Error 200 OK

TLS/SSL

TLS/SSL Connection

SSL Handshake