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Java Networking

Java Networking. Yoshi. What we have learnt before. Java I/O Decorator pattern (Very important!) Use java.net.Socket to connect to a server Have you tried it?. A Case Study. Let’s implement a Tiny HTTP Server First, we have to know something about HTTP protocol

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Java Networking

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  1. Java Networking Yoshi

  2. What we have learnt before • Java I/O • Decorator pattern (Very important!) • Use java.net.Socket to connect to a server • Have you tried it?

  3. A Case Study • Let’s implement a Tiny HTTP Server • First, we have to know something about HTTP protocol • http://en.wikipedia.org/wiki/HTTP

  4. Tiny HTTP Server • Method outline • startServer • Waiting for client request • makeGUI (Not important here) • Draw a close button on the screen • processClient • Handle the HTTP Request • release • Release the port 80 • main • Check the source code!

  5. Tiny HTTP Server • What’s the problem with this version? • How many connections can it handle at the same time?

  6. Threadless Wait for connection Handle

  7. Threaded Version • Review java.lang.Thread and java.lang.Runnable • Remember that we have two ways to create threads! • Why? • Check the source code! • What the difference parts?

  8. Threaded New Thread! Wait for connection New Thread! New Thread!

  9. Can we make it better? • Can we run web-based application? • PHP, ASP, JSP…etc • Is it hard? • We have a competitor • Jetty • http://www.mortbay.org/jetty/

  10. Tools • Firefox add-on plug-in • HttpFox • Wireshark (known as Ethereal before)

  11. Summary • java.io.* • http://java.sun.com/j2se/1.5.0/docs/api/java/io/package-summary.html • java.net.* • http://java.sun.com/j2se/1.5.0/docs/api/java/net/package-summary.html • Check it out!

  12. Exercise Expand the functionalities of this Tiny HTTP Server

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