Realtime with websockets
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This document summarizes a presentation by Giancarlo Gomez on using WebSockets with ColdFusion. Giancarlo introduced himself and his background. He then defined WebSockets as a full-duplex communication protocol that establishes a persistent connection between client and server. Giancarlo demonstrated how to enable WebSockets in ColdFusion and use the <cfwebsocket> tag. He also discussed challenges like secure connections, clustering, and building real-time applications with WebSockets.
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Realtime with websockets
- 1. ColdFusion Summit 2016 Realtime with WebSockets w/ Giancarlo Gomez
- 2. Realtime with WebSockets Who am I? ‣ Proud Father of 3 ‣ Web Developer since 1999 ‣ Freelance since 2001 ‣ South Florida ColdFusion User Group Co-Manager ‣ Owner of Fuse Developments, Inc. and CrossTrackr, Inc.
- 3. Realtime with WebSockets What are WebSockets? WebSockets are a full-duplex, persistent connection from a client to a server over a single TCP Connection. Once the connection is established, it stays open until the client or server decide to close the connection. This makes web programming entirely event driven, not (just) user initiated. It is stateful, as a single running server is aware of all connections, allowing you to communicate with any number of them at any given time.
- 4. Blah Blah Blah … Show me what I can do with this and I don’t mean chat.
- 5. Realtime with WebSockets HTTP Architecture Request Response Half-Duplex Communication
- 6. Realtime with WebSockets Short Polling Request Response Loop AJAX Request on client side and ask the server for an update 6
- 7. Realtime with WebSockets Long Polling Request Response Send AJAX request to server, request loops on server until there is a response and then returns to client and processes starts over again.
- 8. Realtime with WebSockets WebSockets Handshake (HTTP Upgrade) Bidirectional Messaging open and persistent connection On side closes channel connection closed
- 9. Realtime with WebSockets WebSockets in ColdFusion ‣ Supported as of ColdFusion 10 ‣ Support over defined port Defaults to 8575 ‣ Flash Fallback Port 1243 Defined in lib/neo-websocket.xml ‣ Set Max Data Size (1024 Kb) ‣ 100 Connection Limit on Standard * Unlimited in Enterprise ‣ Introduced in ColdFusion 11 ‣ No Connection Limits ‣ Proxy Support Great when behind a firewall and easier when dealing with SSL and multiple domains ‣ SSL Support Browsers no longer allow for non-secure connections over secured connections ‣ Cluster Support * Enterprise Only
- 10. Realtime with WebSockets Enable WebSockets in ColdFusion in “4 EASY STEPS” ‣ Enable in Admin ‣ Add 1 Line in your Application.cfc ‣ Use the cfwebsocket tag ‣ Write some JavaScript and get creative
- 11. Realtime with WebSockets ColdFusion 10 Admin
- 12. Realtime with WebSockets ColdFusion 11 Admin Using Proxy Standard Enterprise
- 13. DEMO 01 4 easy steps and a little bit more …
- 14. Realtime with WebSockets Secure WebSockets - WSS ‣ Easiest Method, use Proxy. It relies on the SSL certificates defined for the site. Requires … ‣ IIS8+ with WebSocket Protocol Enabled ‣ Apache 2.2+ compiled with worker module not prefork (Apache MPM Worker) ‣ Using Built in WebSocket Server ‣ Create JKS (Java KeyStore) or PKCS12 file. ‣ JVM Setting (Fixes SSLException Error) -Dcom.sun.net.ssl.enableECC=false ‣ If using self-assigned certificate ‣ Add certificate as a trusted certificate in Java keystore * this will fix issues with cfhttp calls as well - the following might as well -Dsun.security.ssl.allowUnsafeRenegotiation=true -Djsse.enableSNIExtension=false ‣ Trust the certificate using your browser
- 15. Realtime with WebSockets Secure WebSockets - WSS - Server Requirements
- 16. Realtime with WebSockets Secure WebSockets - WSS - Proxy w/ IIS
- 17. DEMO 02 What do you mean it does not work?
- 18. Realtime with WebSockets WebSocket Clusters Instance A Client A Client B Instance B Client C Client D
- 19. Realtime with WebSockets WebSockets Clusters ▸ Must use built in WebSocket Server ▸ Create Instances in Instance Manager ▸ Define Cluster ▸ Rebuild Connections ▸ Turn on WebSocket clustering on all instances ▸ Have fun testing ….
- 20. Realtime with WebSockets Real World Uses ‣ Dashboards (Stocks, Airlines, …) ‣ Auctions Sites ‣ Chat ‣ Push Messaging (email, notifications, etc) ‣ Games ‣ Use your imagination … anything is possible
- 21. Real World Issues!!! Me and every other Developer ‣ Network Connections ‣ Application Reloads ‣ Server Uptime
- 22. Realtime with WebSockets Hello AdvancedSocket ‣ Easily integrates with cfwebsocket ‣ Callbacks for connection drops that easily lets you add notifications to for users ‣ Application Reinit ‣ Server Downtime ‣ Network Connection ‣ Automatically reconnect to subscribed channels
- 23. DEMO 03 Wait, they gave me something kind of broken?
- 24. DEMO 04 Ok show me how easy it is to build an app … Now we chat
- 25. DEMO 05 I don’t meet the requirements. What can I do?
- 26. Realtime with WebSockets Helpful Links ‣ Repos ‣ https://github.com/GiancarloGomez/Realtime-With-WebSockets-Demo-Code ‣ https://github.com/GiancarloGomez/AdvancedSocket ‣ https://github.com/GiancarloGomez/ColdFusion-CFSummit-WebSockets ‣ SSL Related Links ‣ https://blog.httpwatch.com/2013/12/12/five-tips-for-using-self-signed-ssl-certificates-with-ios/ ‣ https://info.ssl.com/how-to-create-a-pfx-p12-certificate-file-using-openssl/ ‣ ColdFusion Articles ‣ http://www.adobe.com/devnet/coldfusion/articles/html5-websockets-coldfusion-pt1.html ‣ http://www.adobe.com/devnet/coldfusion/articles/html5-websockets-coldfusion-pt2.html ‣ http://www.adobe.com/devnet/coldfusion/articles/using-websocket.html ‣ https://helpx.adobe.com/coldfusion/developing-applications/coldfusion-and-html-5/using-coldfusion-websocket/websocket-enhancements.html ‣ WebSockets (Server / Services) ‣ http://socket.io/ ‣ https://www.pubnub.com/ ‣ https://pusher.com/
- 28. Q & A