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DNG_23691's avatar
DNG_23691
Icon for Nimbostratus rankNimbostratus
Oct 27, 2009

.NET vs. HTML Basic Monitoring

Problem: I can use a basic http monitor to query a .html page and get a response text with no issue. However, if I use a .NET page (.aspx) it will fail. The response text in the browser is correct, but the underlying code returned on the page must not be. Can't figure it out.

 

 

Monitor details:

 

 

GET /ck.cfm HTTP/1.1\nHOST:www.xyz.com\nConnection: Close\n\n

 

 

Returns Hello in the browser and Hello in the source of the return.

 

 

GET /HealthCheck.aspx HTTP/1.1\nHOST:www.xyz.com\nConnection: Close\n\n

 

 

Returns Hello in the browser but returns this in the source:

 

 

 

 

 

<br> Health Check Page <br>

 

 

name="form1" method="post" action="HealthCheck.aspx" id="form1">

 

 

 

 

 

 

 

Hello

 

 

 

 

 

 

 

 

Can't be sure what's going on.

 

 

Any thoughts?

 

 

management
monitoring

4 Replies

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  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Oct 27, 2009
    Hi,

     

     

    Are you saying that HTML is what you see in the response from the health monitor? If so, that looks correct. The Hello text and the other HTML is rendered by the browser as Hello. Does the monitor correctly mark the pool member up?

     

     

    If not, can you clarify what the issue is?

     

     

    Thanks,

     

    Aaron
  • DNG_23691's avatar
    DNG_23691
    Icon for Nimbostratus rankNimbostratus
    Oct 27, 2009
    Sorry I wasn't clear.

     

     

    The ck.cfm file returns just the text Hello both in the browser view and when you view the source of the browser view.

     

     

    The .aspx page returns the text Hello only in the browser view. The view source shows the code above. The F5 is marking the .aspx monitor as down.
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Oct 28, 2009
    If you enable bigd debug (b db bigd.debug enable / disable) and check the log file (/var/log/bigdlog), do you see a valid response being marked as failed? What does the debug log show for the response which should contain "Hello"?

     

     

    RFC2616 states the delimiter between HTTP header lines is a \r\n not just \n. Depending on version, bigd automatically appends one or two \r\n's to the send string before sending it to the pool members. Could you try changing the send string to:

     

     

    GET /HealthCheck.aspx HTTP/1.1\r\nHOST:www.xyz.com\r\nConnection: Close\r\n

     

    or

     

    GET /HealthCheck.aspx HTTP/1.1\r\nHOST:www.xyz.com\r\nConnection: Close

     

     

    Aaron
  • DNG_23691's avatar
    DNG_23691
    Icon for Nimbostratus rankNimbostratus
    Oct 28, 2009
    I'm sorry, after reviewing this more closely, I found I was using the wrong URL in the monitor. Its working fine. Thanks for responding.