Django ws
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This document discusses building single-page web applications with Django, Twisted, and TxWebsocket. It describes how websockets provide persistent TCP connections and low latency data exchange. It compares multi-page vs single-page applications and how Django-WS bootstraps websocket connections and routes URLs both server-side and client-side. Django-WS integrates Django authentication, a client transport pool, and event subscription with Twisted for static resources. Challenges include further integrating with Django conventions and improving documentation.
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
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Django ws
- 1. Django WS Building Single-page web-applications with Django, Twisted and TxWebsocket Jeroen van Veen
- 2. Websockets? ● Persistent TCP connection browser-server ● Data exchange ○ Handshake protocol (currently Hybi-16) ○ Both UTF-8-encoded & binary data ○ Low latency, no headers ○ Easy serializing with JSON ● Support ○ Python: TxWebsocket, Autobahn WS, Gevent-websocket ○ Browser: Chrome, Firefox, Opera, Safari, IE10 ○ Browser fallback: Flash Websocket
- 3. Multi-page VS Single-page
- 4. Bootstrapping ● Each url routes initially to the HTML/JS bootstrap view ● The websocket connection is initialized ● During the handshake, the sessionid cookie is being reused ● Set transport.user and add the transport to the client Pool ● Signals are used to notify listening code for events like connect, disconnect, view_changed, etc. ● The navigation-bar URL is routed through the javascript application and gets the appropriate content
- 5. URL Routing ● Mimick Django URL routing serverside ● And clientside... ● XRegexp for named group support ● Usable with HTML5 history API ● Capture link click events ● Client URL tracking and signalling
- 7. Django-WS ● Django authentication during handshake with session cookie ● Client transport pool handling ● Event subscription (f.i. client connect,disconnect) ● Websocket URL-routing protocol ● Twisted MultiFile for static resources & management commands to integrate Twisted in Django ● dws namespace, seperate python modules ● Clientside RequireJS modules ● BSD license
- 8. In development ● Django-ws modules: core, misc, blog, wiki ● Narrowcaster ● ...
- 9. Challenges ● Integrate further with Django ○ Use existing conventions where possible ○ Compatibility modus for HTTP-based Django apps ● Cleanup design ● Proper documentation ● Usable reference Websocket CMS ● Community ● SEO
- 10. Questions? Code https://github.com/phrearch/django-ws-core Contact vanveen@gw20e.com https://twitter.com/#!/jeroen_van_veen