Introducing Google data APIs
Jun Yang
Software Engineer
Beijing, China 2007-05-31
全貌
谷歌的使命是整合全球信息,使人人皆可访问并从中受益 价值观之一:以用户为中心,其他一切纷至沓来 长尾应用的难题
Copyright 2007 Google Inc.
长尾的问题
Copyright 2007 Google Inc.
长尾应用的解决方案
数据API是长尾应用解决方案的一部分 另一部分就是第三方开发商的参与
Copyright 2007 Google Inc.
谷歌的API
AJAX APIs – Presentation Oriented APIs
– Maps, Search, Feeds
Google Data APIs – Full Fidelity Data APIs
– Calendar, Blogger, Base, Picasaweb, ...
Other APIs
– AdWords, Gadgets, Checkout, Desktop, ...
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Copyright 2007 Google Inc.
"The benefit [of GData] is that you'd have a single API that could be used to query, update, and index structured data on the web--anywhere on the web. It's a pretty powerful vision and something I didn't expect to see for a couple more years." "访问有序数据单一的API"
Jeremy Zawodny, Yahoo
"I've been reading the Google Data APIs blog for a few months and have been impressed at how Google has been quietly executing on the plan of having a single uniform RESTful Web Service interface to their various services." "统一的Web Service接口"
Dare Obasanjo, 25hoursaday.com
REST风格的Web Service
REST风格
– 4个动词(Create, Retrieve, Update, Delete) + 很多2种类型
的名词(Feed and Entry)
– 正是HTTP的工作原理,和Web完全兼容 (caching,
proxying, etc.) 事实上Web生存到现在只用了2个动词 (GET + POST)
对比远程过程调用(RPC)风格
– 很多动词 + 很多类型的很多名词 – 和Web不完全兼容
先普及,后标准的成功之路
Copyright 2007 Google Inc.
GData的目标
给所有谷歌的服务一个数据API
Google Base Google Calendar Google Spreadsheets Google Apps … Blogger Google Notebook Picasa Web Albums Google Code Search
让所有的开发人使用数据API
Java Python Objective C JSON C++ … .NET PHP
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