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WebSockets - Today, in the Past, in Future and in Production.
Jul. 3, 2014•0 likes•946 views
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In the given talk I cover interesting fact about the protocol which provides HTTP bidirectional communication. Starting with the past state of web sockets and their implementation I explain the protocol step by step, present my own stream based WebSocket implementation and compare it to present challengers. To the end I talk about my personal experience with WebSockets and how I predict the future of them.
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WebSockets - Today, in the Past, in Future and in Production.
- WebSockets by Bodo Kaiser
- What are WebSockets? WebSockets allow bidirectional communication over HTTP!
- HTTP Server Client GET / HTTP/1.1 Host: localhost Accept: */* HTTP/1.1 200 OK Content-Type: text/plain Content-Length: 12
- WS Server Client GET / HTTP/1.1 Host: localhost Upgrade: websocket Connection: Upgrade Sec-WebSocket-Key: … Sec-WebSocket-Version:13 HTTP/1.1 101 Switching… Upgrade: websocket Connection: Upgrade Sec-WebSocket-Accept: …
- Frame Encoding 1000 0001 0000 0101 0100 1000 0110 0101 0111 1001 PayloadHeader H e y F I N R S V OP CODE M A S K LENGTH Extended Length Masking
- WebSockets in node.js socket.io by learn boost fallback support, high level api (e.g. events) ! ws by einaros „fastest“ websocket implementation
- Walve - socket.io by learn boost not working, using xhr fallback all the time, cannot read code for PR ! - other ws implementations awful API design, also bad to read 1. Follows node’s core conventions 2. Uses node’s TransformStreams 3. Written in readable JavaScript
- Design http.Server „upgrade“ Event walve.Server walve.Response walve.Socket walve.Socket walve.Incoming walve.Outgoing „response“ Event Some Router / Web Framework
- Code Examples Visit http://github.com/bodokaiser/node-walve ! ! ! Do not forget to leave a Start :)
- Performance (Hello World) Hello World 0,000 1,000 2,000 3,000 4,000 5,000 ws walve
- Performance (Small Image) Small Image 60,000 70,000 80,000 90,000 100,000 110,000 ws walve
- Performance (Large Image) Large Image Werteachse 2000,000 2400,000 2800,000 3200,000 3600,000 4000,000 4400,000 4800,000 5200,000 5600,000 6000,000 ws walve
- Performance (Memory Consumption) Memory Consumption 0,0 100,0 200,0 300,0 400,0 500,0 walve ws
- Further Thoughts 1. Reliability ! 2. Extendability ! 3. Future development ! 4. Mobile Usage (ProTip)
- Examples Messenger ! Simple WebSocket Chat with Image support. Nearby ! Realtime Tracking with Google Maps and Geolocation. ! http://github.com/bodokaiser/messenger http://github.com/bodokaiser/nearby
- Thanks and Q&A Follow me on twitter @bodojs ! Star my projects on github github.com/bodokaiser
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