HTTP

WARNING It’s about to get real in here! Be sure
you have cURL installed! If you don’t, you can download it at: http://bit.ly/curl-download

HTTP and APIs

Who are you people?

I — Web Development

I — Servers

I — Front-End Dev

I — Ruby

I — JavaScript

I — Starting Companies

I — Selling People Stuff

What do you—?

What do you—? Come and Tell Me, Seriously!

Why sit and learn about HTTP for an hour and
a half?

http://www.ﬂickr.com/photos/sashawolff/3228711025/

The Server http://www.ﬂickr.com/photos/sashawolff/3228711025/

The Server The Browser http://www.ﬂickr.com/photos/sashawolff/3228711025/

HTTP The Server The Browser http://www.ﬂickr.com/photos/sashawolff/3228711025/

I’m pedantic enough to be a little irritated by the
common “Web vs Native” usage. They’re all Web apps, and this argument is really about client platforms; no more, no less. - Tim Bray http://www.tbray.org/ongoing/When/201x/2011/06/14/Native-vs-Web

HTTP is a four-letter word

$_GET and $_POST

I’m a web developer! http://www.ﬂickr.com/photos/rodrigosa/5816634363/

http://www.ﬂickr.com/photos/span112/2247470632/

http://www.ﬂickr.com/photos/puuikibeach/24433366/

http://www.ﬂickr.com/photos/puuikibeach/24433367/

The Most Common HTTP Request In The World

Anatomy of The Most Common HTTP Request In The World

> telnet google.com 80 Trying 74.125.67.147... Connected to google.com. Escape
character is '^]'. GET / HTTP/1.1 Host: www.google.com

GET / HTTP/1.1 Host: www.google.com Method URI HTTP Version Headers

Request Methods

GET POST PUT DELETE OPTIONS PATCH CONNECT HEAD TRACE http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html

DELETE

Common Request Headers http://www.ﬂickr.com/photos/alza06/3956562963/

Accept Host If-None-Match User-Agent If-Modiﬁed-Since Accept-Encoding Accept-Language Authorization Cookie Referer

Accept

Referer

User-Agent

If-None-Match

If-Modiﬁed-Since

Cookie

Request Body

The Response http://www.ﬂickr.com/photos/paulcross/5819125499/

HTTP/1.1 200 OK Date: Mon, 20 Jun 2011 01:31:09 GMT
Expires: -1 Cache-Control: private, max-age=0 Content-Type: text/html; charset=ISO-8859-1 Set-Cookie: PREF=ID=e446d3d1e8716b64:FF=0:TM=1308533469:LM=1 8; expires=Wed, 19-Jun-2013 01:31:09 GMT; path=/ Set-Cookie: NID=48=LjvfA6B_EsbDM8pmkis7YdVijYG2RLCc78Ne0my9Q eSzuB6iCOkDOAl78_oEMugbXV2lD82hyLkeJhuY6-RiVZkRK 20-Dec-2011 01:31:09 GMT; path=/; domain=.google Server: gws X-XSS-Protection: 1; mode=block <!doctype html><html><head><meta http-equiv="con

Status Headers Body HTTP/1.1 200 OK Date: Mon, 20 Jun
2011 01:31:09 GMT Expires: -1 Cache-Control: private, max-age=0 Content-Type: text/html; charset=ISO-8859-1 Set-Cookie: PREF=ID=e446d3d1e8716b64:FF=0:TM=1308533469:LM=1 8; expires=Wed, 19-Jun-2013 01:31:09 GMT; path=/ Set-Cookie: NID=48=LjvfA6B_EsbDM8pmkis7YdVijYG2RLCc78Ne0my9Q eSzuB6iCOkDOAl78_oEMugbXV2lD82hyLkeJhuY6-RiVZkRK 20-Dec-2011 01:31:09 GMT; path=/; domain=.google Server: gws X-XSS-Protection: 1; mode=block <!doctype html><html><head><meta http-equiv="con

Response Status http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 1xx Informational 2xx Successful 3xx Redirect 4xx
Client Error 5xx Server Error

Response Headers Expires Set-Cookie Content-Length Connection Cache-Control ETag Content-Type Server
Location WWW-Authenticate Date http://en.wikipedia.org/wiki/List_of_HTTP_headers

Content-Type

Content-Length

Set-Cookie

Cache-Control

Expires

Response Body

Caching http://www.ﬂickr.com/photos/epsos/5394616925/

Authentication

HTTP Problems

Let’s Build An API

SuperMegaWeatherData It’s like Wikipedia for Weather NASA

REST Represenational State Transfer

C R U D DELETE PUT GET POST REATE EAD
PDATE ELETE

Content Types

Authentication

Versioning http://www.ﬂickr.com/photos/iboy/4290803434/

[email protected] @commondream

HTTP

HTTP

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