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Simple Logging HTTP Proxy with Grinder

· Java Zone

Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code! Brought to you in partnership with ZeroTurnaround.

 Sometimes I need to observe HTTP communication between my and another machine. I usually use Eclipse’ integrated TCP/IP monitor for it’s simple and does its job well but today for a large response it just displayed “The HTTP content is too large to display.” so I started searching for alternatives and found the Grinder TCPProxy, written in Java and distributed under the BSD license.

Grinder is a Java load testing framework and the proxy is just a part of it. Here is how you would start the proxy to forward local port 6080 to the remote address example.webservices.com:80 and log the HTTP communication into a file:

java -cp lib/grinder.jar net.grinder.TCPProxy -console -localhost 127.0.0.1  
-localport 6080 -remotehost example.webservices.com -remoteport 80 > http.log

The optional flag -console makes it  to display a window for shutting it down cleanly (likely unnecessary under Linux/Mac). When you want it to log just into the console, add -colour for nicely colored output.

Run it with -? to see all the available options.

From http://theholyjava.wordpress.com/2011/07/28/simple-logging-http-proxy-with-grinder/

The Java Zone is brought to you in partnership with ZeroTurnaround. Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code!

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