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Charles: An Analysis and Debugging Tool for the Web Developer

 

JavaScriptSearch
Thursday, April 27, 2006; 02:53 AM

Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP traffic between their machine and the Internet. This includes requests, responses and the HTTP headers (which contain the cookies and caching information).

Evaluation copy of version 2.5 is available at http://www.xk72.com/charles/index.php . There is also a public documentation wiki, containing instruction on installation and usage. Charles can be run on Windows, Unix, and Mac OS X.

Charles can act as a man-in-the-middle for HTTP/SSL communication, enabling you to debug the content of your HTTPS sessions.

Charles simulates modem speeds by effectively throttling your bandwidth and introducing latency, so that you can experience an entire website as a modem user might (bandwidth simulator).

Charles is especially useful for Macromedia Flash developers as you can view the contents of LoadVariables, LoadMovie and XML loads.

Charles is also useful for XML development in web browsers, such as AJAX (Asynchronous Javascript and XML) and XMLHTTP, as it enables you to see the actual XML that is flowing between the client and the server.

Charles screenshot

Charles

 

Charles will autoconfigure your browser's proxy settings on the following browsers:

  • IE (Windows system proxy settings)

  • Firefox

  • Safari (Mac OS X system proxy settings)



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