the basics of http jason dean
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The Basics of HTTP
Jason Deanhttp://www.12robots.com
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 (http://www.12robots.com)
Veteran of the U.S. Coast Guard
Overview
HTTP on the OSI Model
Resources
HTTP URL Basics
<scheme>://<host>:<port>/<path>?<query>#<frag>
Example:
HTTP Messages
HTTP Message Flow
HTTP Message Parts
Requests
Start Line POST http://demo.12robots.com:81/simple1request.cfm HTTP/1.1
HeadersHost: http.12robots.com:81Content-type: application/x-www-form-urlencodedContent-length: 10
Body myID=12345
Request MethodsGET
OPTIONS
PUT
DELETEHEAD
POST
TRACE
Responses
Start Line HTTP/1.1 200 OK
Headers
Content-Type: text/html; charset=UTF-8Connection: closeDate: Sun, 01 Mar 2009 02:55:05 GMTServer: Apache/2.2.10 (Win32) JRun/4.0
Body
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 4.0//EN"><html><head><title>My Page</title></head><body><h1>My POST Request Response</h1><p>The ID you passed in is: 12345.</p></body></html>
Status Codes
404 Not Found302
Fou
nd
301
Mov
ed P
erm
anen
tly
403 Forbidden 401 Unauthorized
500 Internal Server Error
200 OK
TLS/SSL
TLS
/SS
L C
onne
ctio
n
SSL Handshake
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