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I have got a testing suite for an applications that performs lots of HTTP requests.

This number changes each time you run the tests. Is there a Unix command or program that "listens" to another program counting its http requests?

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Any packet sniffer will do that for you. Check out tcpdump or wireshark. You'll have to setup a few filters on the data they collect, but that's easy.

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how would you tell which requests are coming from the application being tested? – Gilles Aug 8 '10 at 16:32
    
Do you know the destination address you're testing? you can probably tell which port your testing application is using. Filter by these criteria also – bryan Aug 8 '10 at 17:44
    
Yup I know the address. Tests always do POST requests to a unique URL – dgraziotin Aug 9 '10 at 9:24
    
wireshark worked fine. Now I know that my test suite performs and checks quite 200 XML-RPC calls :) Thank you! – dgraziotin Aug 9 '10 at 16:24
  • You can trace your application's system calls with truss/trace/strace/... (the name, command line syntax and output format is OS-dependent), and watch for connect calls. If your application also uses non-HTTP networking you may have to work a little harder to filter the relevant connections.

  • You can use LD_PRELOAD or a debugger to modify the function that creates the HTTP connections. But this may be too intrusive for a test.

  • You can put a simple proxy between your application and the web. Both perl and python come with libraries that would make it a 10–20-line program. This is the approach I'd prefer unless you're specifically testing your application's behavior against a specific server or proxy.

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