Websocket talk in nodejs.tw
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這篇文檔討論了websocket的歷史、工作原理和未來展望，從最初的hixie-76到rfc 6455的演進。websocket提供了一種基於HTTP的雙向通訊協定，能在客戶端和服務器之間持續傳輸數據。文中還提到了一些實作方式，並展示了一個多人共享白板的範例。
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![肠濒颈别苍迟端的使用方式
? 利用WebSocket這個constructor建立連結
的instance
? ex. new WebSocket(‘ws://localhost:8080,
[‘echo-protocol’,‘chat’])
? 利用send()方法送資料
? 利用message事件接收資料
12年4月27日星期五](https://image.slidesharecdn.com/websocket-talk-nodejs-tw-120427002626-phpapp01/85/Websocket-talk-in-nodejs-tw-10-320.jpg)
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Websocket talk in nodejs.tw
- 1. websocket 過去現在..未来？ By Fillano 12年4月27日星期五
- 2. 自我介绍 ? 卑微的IT工程師 ? Javascript技術狂熱者 ? 喜歡探索新技術 ? 渾名：?llano 12年4月27日星期五
- 3. 飞别产蝉辞肠办别迟经验 ? 2010年ITHelp鐵人賽後 ? GTUG HTML5 Hackathon ? 以node.js實作過簡單的Hixie-76 Draft版 本的websocket伺服器 ? 其實不多XD 12年4月27日星期五
- 4. Hixie 76 ? 時間：2010年 ? socket.io剛出現 ? handshake大不同 ? data frame大不同 ? 只能傳送utf-8字串 12年4月27日星期五
- 5. RFC 6455 ? 2011年底 ? handshake比較簡單 ? data frame大不同 ? 可傳送binary資料及utf-8字串 ? ping/pong frame 12年4月27日星期五
- 6. 到底什麼是飞别产蝉辞肠办别迟 ? ?一套client side API（HTML5） ? ?一個與HTTP相容的通訊協定（ex. hixie-76, hybi-10, RFC6455） ? 提供client/server間雙向資料傳輸的機制 ? 除非?一方關閉連結，否則連結就是持續 不斷的。關閉後需要從頭開始... 12年4月27日星期五
- 7. websocket life cycle request / handshake response / handshake 時 客 伺 frames 間 戶 服 端 ping 器 pong frames close 12年4月27日星期五
- 8. 与丑迟迟辫相容的特性 ? 類似?一個keep alive的request/response ? client會送出request header ? server會回覆response header ? ?一些header資訊也可以同時利用，例如 cookie ? 也支援https的傳輸加密，wss://* 12年4月27日星期五
- 9. 跟丑迟迟辫不同的地方 ? header中許多欄位跟?一般http不同，用來 傳遞特定資訊，或是做handshake ? 連結是keep alive的，不會重複送出header ? 資料傳送是雙向的 ? 資料傳送有特定的binary格式 12年4月27日星期五
- 10. 肠濒颈别苍迟端的使用方式 ? 利用WebSocket這個constructor建立連結 的instance ? ex. new WebSocket(‘ws://localhost:8080, [‘echo-protocol’,‘chat’]) ? 利用send()方法送資料 ? 利用message事件接收資料 12年4月27日星期五
- 11. 蝉别谤惫别谤端的使用方式 ? 以node.js來說，就看你用哪個module ? 目前支援比較好的是websocket-node (npm install -g websocket) ? socket.io用的不?一定是websocket，它會 優先使用?ash做傳輸（請看他網站上的 faq說明），所以我才選上面這個module 來做測試 12年4月27日星期五
- 13. 未来？ ? WebSocket與RFC6455本身應該不會有大 變動 ? WebRTC目前制定的規格，還很難跟 websocket直接整合，而且效能... ? Microsoft提案Stream API，利用它可以把 資料append到blob，這樣就有機會利用 websocket轉送blob來播放audio/video 12年4月27日星期五
- 14. Q&A 12年4月27日星期五
- 15. 参考资料 ? http://tools.ietf.org/html/rfc6455 ? http://www.whatwg.org/specs/web-apps/ current-work/#network ? http://dev.w3.org/html5/websockets/ ? http://www.w3.org/TR/FileAPI/ ? https://github.com/Worlize/WebSocket- Node/wiki/Documentation 12年4月27日星期五