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Thales_92506's avatar
Thales_92506
Icon for Nimbostratus rankNimbostratus
Sep 13, 2011

How to make an EAV to check a string deeper than 5,120 bytes into an HTTP response?

I need to make a monitor that searches for a word in a http response, but that word is in the end of the string.

 

 

Regular monitors goes only to 5,120 bytes, so i need to create an EAV (External Application Verification) for this task.

 

 

 

How do i do this?

 

 

 

Thanks.

 

management
monitoring
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Sep 13, 2011
    Hi Thales,

     

     

    As far as I'm aware, the 5120 byte limit is not user-configurable. You could use an external monitor instead:

     

     

    http://devcentral.f5.com/wiki/AdvDesignConfig.codeshare.ashx ->

     

    http://devcentral.f5.com/wiki/AdvDesignConfig.HTTPMonitor_cURL_BasicGET.ashx

     

     

    Aaron
  • George_Watkins_'s avatar
    George_Watkins_
    Historic F5 Account
    Sep 13, 2011
    Thales,

     

     

    Another thing to consider is writing a separate script that lives on your origin web servers that is a wrapper for a number of tests performed on the application. I've done this in the past so that the BIG-IP health monitor can be as simple as possible while leaving the logic in a script on the webservers. You can also build some caching into the test script as well to prevent overloading your backend with excessive requests from health monitors.

     

     

    -George
  • Thales_92506's avatar
    Thales_92506
    Icon for Nimbostratus rankNimbostratus
    Sep 14, 2011
    Thanks for the help.

     

     

    For now i´ll try the EAV monitor. I´m not so familiar with server scripts.

     

     

    In this example (http://devcentral.f5.com/wiki/AdvDesignConfig.HTTPMonitor_cURL_BasicGET.ashx), if i put my request at the URI and the string i expect at the RECV, will it work without the 5,120 bytes limit?

     

     

    Thanks.