Web Communication
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This document discusses different methods of web communication including web messaging, web workers, server sent events, and web sockets. Web messaging allows secure communication between documents from different domains. Web workers run JavaScript without blocking the user interface. Server sent events push data from the server to the client over HTTP. Web sockets provide bi-directional communication between the server and client with low overhead. Examples of uses include portals, widgets, ads, live scores, polls, auctions and more.
Web Communication
- 1. Web Communication adrian.olaru@1and1.ro
- 3. Connectivity
- 4. Web Messaging Web Workers Server Sent Events Web Sockets
- 5. The way of the force
- 7. Don’t trust client e.data Always check e.origin
- 8. Web Messaging allows documents from different domains to communicate with each other in a secure way
- 9. Browser Support* * source: http://caniuse.com 5.0+ 3.0+ 8.0 4.0+ 10.1+
- 13. Web Workers run JavaScript in parallel on a web page, without blocking the user interface
- 14. Browser Support* * source: http://caniuse.com 5.0+ 3.5+ 4.0+ 10.6+
- 17. Notes can’t access parent & it’s DOM ‘this’ == current worker can use XHR, SSE or WebSocket can importScripts(‘script.js’) can use other workers can use timers (setTimeout, setInterval)
- 18. Server Sent Events push data from the server to the client over HTTP
- 19. Browser Support* * source: http://caniuse.com 6.0+ 4.0 5.0 11
- 25. Use Cases subscribe to live score real time polls bidding updates for actions stock quotes live news
- 26. Web Sockets a bi-directional connection between the server and the client
- 27. Browser Support* * source: http://caniuse.com 5.0+ 4.0 * 5.0 11 * * deactivated by default
- 31. Notes full duplex communication removes the overhead (only 2 bytes) dramatically reduces complexity
- 32. Use Cases online chat online games realtime geolocation package tracking
- 35. Danke