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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

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HTTP and APIs

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Who are you people?

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Me!

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I —

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I — Web Development

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I — Servers

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I — Front-End Dev

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I — Ruby

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I — JavaScript

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I — Starting Companies

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I — Selling People Stuff

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What do you—?

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

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

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

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

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

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

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

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

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

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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

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HTTP is a four-letter word

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$_GET and $_POST

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

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

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

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

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The Most Common HTTP Request In The World

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Anatomy of The Most Common HTTP Request In The World

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

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

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Request Methods

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

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GET

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POST

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PUT

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DELETE

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

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

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Accept

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Host

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Referer

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User-Agent

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If-None-Match

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If-Modified-Since

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Cookie

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Request Body

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

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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

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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

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

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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

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Date

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Content-Type

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Content-Length

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Set-Cookie

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Cache-Control

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Expires

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ETag

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Response Body

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

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Authentication

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HTTP Problems

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Let’s Build An API

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SuperMegaWeatherData It’s like Wikipedia for Weather NASA

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REST Represenational State Transfer

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CRUD

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

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Content Types

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Authentication

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

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[email protected] @commondream