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REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
REST to RESTful Web Service
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REST to RESTful Web Service

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從混沌的 Web 世界中,回頭探討 HTTP 最初的 REST 架構與精神,想想我們創造了什麼?也忽略了什麼?

從混沌的 Web 世界中,回頭探討 HTTP 最初的 REST 架構與精神,想想我們創造了什麼?也忽略了什麼?

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  • 1. REST  to  RESTful Web Service sj 2011/09/28 sj@toright.com http://blog.toright.com
  • 2. Representational State Transfer 2000 年 Dr. Roy Fielding 提 出的博士論文  RFC 2616 的基礎 / Web 的聖經
  • 3. REST 不是標準或協定 REST 是一種軟體設計架構風格 http://www.techcn.com.cn/index.php?doc-view-146097.html
  • 4. What is RESTful ?? 美麗 (beauty) 的事物可以稱為 Beautiful 同理可證 設計為 REST 的系統我們就稱為 RESTful
  • 5. 導讀推薦文章 How I Explained REST to My Wife 作者:Ryan Tomayko
  • 6. 使用 Internet 是一件簡單且 直覺的動作 就像是豐富的名詞加上多態的動詞
  • 7. REST 概念介紹  
  • 8. REST Constraints ● Client-Server ● Stateless - 無狀態設計 ● Cacheable - 可實作快取 ● Uniform Interface - 一致性的介面 ○ Identification of resources - 唯一的資源識別 ○ Manipulation of resources - 特定的操作方法 ○ Self-descriptive messages - 訊息自我描述 ○ Hypermedia as the engine of application state - !? ● Layered System - 層級式架構 ● Code-On-Demand (optional) - 像是 JavaScript
  • 9. REST Architectural Elements ● REST Data Elements ● REST Connectors ● REST Components
  • 10. REST Data Elements ● Resources and Resource Identifiers 透過一個全域的資源識別命名來對應與實體 (Entity) 間的關 係。 ex: HTTP URL ● Representations 在超媒體網路中資源呈現的各種方式 ex: HTTP Content-Type
  • 11. REST Connectors ● Client ex: HTTP Client Library ● Server ex: Apache API ● Cache ex: Browser Cache, Network Cache ● Resolver ex: DNS lookup ● Tunnel ex: SOCKS, SSL
  • 12. REST Components ● User Agent   ex: Browser ● Origin Server ex: Apache httpd, M$ IIS ● Gateway ● Proxy Components 透過 Connectors 進行訊息交換
  • 13. REST 到底是什麼!? http://futbol1.io.ua/s381473/sistema_super_bystroy_podgotovki_futbolistov_vysshego_klassa
  • 14. HTTP 本身就是 REST 的實作! http://news.sina.com.tw/books/history/barticle/15368.html
  • 15. RESTful Web Service  
  • 16. What is RESTful Web Service ?? ● 符合 REST  Constraints 的 Web Service 設計 http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam Q : HTTP 不就是 REST 的實作了嗎??那到底該怎麼設計 RESTful Web Service ?? A : 只要善用 HTTP 就對了!!
  • 17. 傳統 Web Service 設計 ● 設計書籍管理系統 ● 新增、刪除、修改、查詢 - CRUD ● XML Web Service
  • 18. Web Service 傳統設計 (1) ● Web Service 網址 /books ● 新增書籍 <action>create</action> <book isbn="A0100">     <title>I hate the REST</title> </book> Response : <status>ok|fail</status> ● 修改書籍 <action>edit</action> <book isbn="A0100">     <title>I hate REST very much</title> </book> Response : <status>ok|fail</status>
  • 19. Web Service 傳統設計 (1) ● 刪除書籍 <action>delete</action> <isbn>A0010</isbn> Response : <status>ok|fail</status> ● 查詢書籍 <action>search</action> <isbn>A0010</isbn> Response : <status>ok|fail</status>
  • 20. Web Service 傳統設計 (2) 改良!? ● 更直覺的網址、更簡易 XML 內文、更通用的回應格式 <response code="0" messgae="ok">     <data/> </respone> ● 新增書籍 /books/create <book isbn="A0100">     <title>I hate the REST</title> </book> ● 修改書籍 /books/update <book isbn="A0100">     <title>I hate REST very much</title> </book>
  • 21. Web Service 傳統設計 (2) 改良!? ● 刪除書籍 /books/delete <isbn>A0010</isbn> ● 查詢書籍 /books/get <isbn>A0010</isbn>
  • 22. Web Service 傳統設計 (3) SOAP SOAP Request <soapenv:Envelope>   <soapenv:Body>     <req:echo xmlns:req="http://xxx.com/MyService/">       <req:category>classifieds</req:category>     </req:echo>   </soapenv:Body> </soapenv:Envelope>
  • 23. Web Service 傳統設計 (3) SOAP SOAP Response <soapenv:Envelope>   <soapenv:Header>     <wsa:ReplyTo>       <wsa:Address>http://schemas...</wsa:Address>     </wsa:ReplyTo>     <wsa:From>       <wsa:Address>http://xxx.com/MyService</wsa:Address>     </wsa:From>     <wsa:MessageID>28BC11433905662036</wsa:MessageID>   </soapenv:Header>   <soapenv:Body>     <req:echo xmlns:req="http://xxx.com/MyService">       <req:category>classifieds</req:category>     </req:echo>   </soapenv:Body> </soapenv:Envelope>
  • 24. 引述:How I Explained REST to My Wife 很遺憾,多數人為了達到同樣的目標,忙著用不同的方法創造出 複雜且不易使用的設計。不但名詞 (Nouns) 不通用,且動詞 (Verbs) 也不多態。我們拋棄了過去幾十年的失敗經驗,再度重 蹈覆轍。我們使用 HTTP 不僅僅是幫助我們使用網路,而卻忽略 了 HTTP Simplicity 的設計初衷與理念,得到的卻是華而不實 而絢麗的工具。 http://bellsee2.blogspot.tw/2011/01/pagliacci.html
  • 25. 遵循 HTTP 設計 RESTful Web Service ● Nouns 為你的資源進行 URL 定義 ● Verbs 選擇適合的 Method 動詞 GET, POST, PUT, DELETE ● Content Types 選擇 Content-type ex: XML / JSON / HTML http://www.onlamp.com/pub/a/onlamp/2008/02/19/developing-restful-web-services-in-perl.html
  • 26. RESTful Web Service 規格 功能 URL HTTP Resquest Method 新增 /books POST 刪除 /books/{isbn} DELETE 修改 /books/{isbn} PUT 查詢 /books/{isbn} GET <book isbn="A0100">   <title>REST1</title> </book> Response Status Code 200|401 200|401|404 <book isbn="A0100">   <title>REST2</title> </book> 200|401|404 <book isbn="A0100"> 200|404   <title>REST1</title> </book> Content-type:application/xml, allpication/json, text/html
  • 27. Conclusion 直覺、簡單、快速 再次實作 HTTP 已經擁有的功能是多餘的 善用 HTTP 就是實現 RESTful 的好方法 『簡單』才是系統設計最佳法則
  • 28. RESTful Web Service Cases Amazon AWS, eBay, Facebook, Yahoo Web Service, Hadoop API, Google Web Service...
  • 29. and you !? http://www.superhappiness.com/albert-einstein.html
  • 30. References ● Ryan Tomayko - How I Explained REST to My Wife ● SOUL & SHELL BLOG - 淺談 REST 軟體架構風格 (Part.I) – 從了解 REST 到設計 RESTful! ● SOUL & SHELL BLOG - 淺談 REST 軟體架構風格 (Part. II) – 如何設計 RESTful Web Service? ● Architectural Styles andthe Design of Network-based Software Architectures
  • 31. The End Thanks! sj@toright.com http://blog.toright.com

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