t004.html

HTTP -- Hyper Text Transport Protocol

Header consists of lines in the format: Keyword: value. While body represents actual data. HTTP request (from browser to server) and HTTP response (from server to browser) are structured this way.

Browser (client) request example:

POST /cgi/script HTTP/1.0
Connection: Keep-Alive
User-Agent: Mozilla/4.78 [en] (X11; U; Linux 2.4.9-13 i686)
Host: 127.0.0.1:9999
Accept: image/gif, image/jpeg, image/pjpeg, image/png, */*
Accept-Encoding: gzip
Accept-Language: en
Accept-Charset: iso-8859-1,*,utf-8
Content-type: application/x-www-form-urlencoded
Content-length: 19

name=Jan&sex=mail

Server response example:

HTTP/1.1 200 OK
Server: Apache/1.2.20 (UNIX)
Content-Type: text/html
Content-Length: 1234

<html>
<head><title>My Page</title></head>
<body bgcolor="red">
<h1>The Title</h1>
....