Realtime with-websockets-2015
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Giancarlo Gomez presented on using websockets for realtime applications with ColdFusion. He began by explaining what websockets are and how they allow for bidirectional messaging with low latency compared to HTTP polling techniques. He then demonstrated how to enable and use websockets in ColdFusion, including securing connections and using websockets in a clustered environment. Finally, he discussed real world uses of websockets and issues to consider like network connections and application reloads.
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Realtime with-websockets-2015
- 1. REALTIME WITH WEBSOCKETS GIANCARLO GOMEZ - COLDFUSION SUMMIT 2015
- 2. REAL TIME 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. REAL TIME WITH WEBSOCKETS WHAT IS A WEBSOCKET AND WHY? ▸ WebSockets allow a long-held single TCP socket connection to be established between the client and server. ▸ This allows bi-directional, full duplex messaging between both sides with very little overhead resulting in very little latency. ▸ WebSockets can replace existing HTTP Long and/or Short Polling techniques.
- 4. REAL TIME WITH WEBSOCKETS HTTP ARCHITECTURE Request Response Half-Duplex Communication
- 5. REAL TIME WITH WEBSOCKETS SHORT POLLING Request Response Loop AJAX Request on client side and ask the server for an update
- 6. REAL TIME 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.
- 7. REAL TIME WITH WEBSOCKETS WEBSOCKETS Handshake (HTTP Upgrade) Bidirectional Messaging open and persistent connection On side closes channel connection closed
- 8. REAL TIME 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 Most browsers now do not allow for non- secure connections if page is secured ▸ Cluster Support * Enterprise Only
- 9. REAL TIME WITH WEBSOCKETS ENABLE WEBSOCKETS IN COLDFUSION ▸ Enable in Admin If using Proxy in ColdFusion 11, your web server must support the WebSocket Protocol. IIS 8+ with WebSocket Protocol Installed Apache 2.2+ compiled with worker module (MPM) ▸ Add 1 Line in your Application.cfc ▸ Use the cfwebsocket tag ▸ Write some JavaScript and get creative
- 10. REAL TIME WITH WEBSOCKETS COLDFUSION 10 ADMIN
- 11. REAL TIME WITH WEBSOCKETS COLDFUSION 11 ADMIN USING PROXY STANDARD ENTERPRISE
- 12. DEMO 1 REAL TIME WITH WEBSOCKETS
- 13. REAL TIME WITH WEBSOCKETS SECURE WEBSOCKETS - WSS ▸ Easiest Method, use Proxy. It relies on the SSL certificates defined for the site. ▸ Using Built in WebSocket Server ▸ Create JKS (Java KeyStore) or PKCS12 file. https://info.ssl.com/how-to-create-a-pfx-p12-certificate-file-using-openssl/ ▸ JVM Setting -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 ▸ Accept the certificate in local keychain (mac)
- 14. DEMO 2 REAL TIME WITH WEBSOCKETS
- 15. REAL TIME WITH WEBSOCKETS WEBSOCKET CLUSTERS Instance A Client A Client B Instance B Client C Client D
- 16. REAL TIME WITH WEBSOCKETS WEBSOCKETS CLUSTERS ▸ Must use built in WebSocket Server (I think) ▸ Create Instances in Instance Manager ▸ Define Cluster ▸ Rebuild Connections ▸ Turn on WebSocket clustering on all instances ▸ Have fun testing ….
- 17. DEMO 3 REAL TIME WITH WEBSOCKETS
- 18. REAL TIME WITH WEBSOCKETS REAL WORLD USES ‣ Dashboards (Stocks, Airlines, …) ‣ Auctions Sites ‣ Chat ‣ Collaboration (ie: Google Docs) ‣ Push Messaging (email, notifications, etc) ‣ Games ‣ Use your imagination … anything is possible
- 19. REAL WORLD ISSUES!!! Me and every other Developer REAL TIME WITH WEBSOCKETS ‣ Network Connections ‣ Application Reloads ‣ Server Uptime
- 20. REAL TIME 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
- 21. DEMO 4 REAL TIME WITH WEBSOCKETS
- 22. Q & A