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HTTP Content sensor - Request returned not enough values. (0/2) (code: PE174)

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We set up the followning status site:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>
               STATUS
        </title>
        <meta http-equiv="X-UA-Compatible" content="IE=8" />
        <META HTTP-EQUIV="Content-Type" content="text/html; charset=UTF-8">
        <link rel="stylesheet" href="/home/Css/login.css" type="text/css">
    </head>
    <body>
    
        <div style="display:none">[100][99]</div>
    </body>
</html>

The sensor connects to the webpage via https with two Integer values. When executing the request, we get the following error: Request returned not enough values. (0/2) (code: PE174)

http-content https ssl

Created on Jun 5, 2013 6:18:15 AM by  Banet GmbH (0) 1

Last change on Jun 5, 2013 4:08:58 PM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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The url, you want to monitor returns a javascript, that redirected the browser to another url. The HTTP sensors(except the HTTP full webpage sensor) are not capable of following js redirects. Please either use http based redirects (302 temporarily not available) or use the url, the redirection points to, for the sensor.

Created on Jun 17, 2013 12:40:23 PM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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Please go to the sensor settings and take a look at the setting "Number of channels". This setting must in your case not be higher than 2, because you only provide two different values in []. If there are more channels, then values, you will get the error message, that you posted.

Created on Jun 5, 2013 4:08:40 PM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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I did some testing and found out that the sensor does work when I check the system on the same network/without a proxy.

But when I want to monitor the "WAN side" and therefore have to use the reverse proxy it does not work. - The error code PE174 arises.

The number of channels is 2

Created on Jun 17, 2013 10:39:35 AM by  Banet GmbH (0) 1



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Does it work, if you use the same proxy but another website?

Does it work, if yo use the proxy with your browser and then open the url, that is used for the sensor?

Does your proxy require authentication? What authentication type is required?

Created on Jun 17, 2013 11:37:11 AM by  Johannes Herrmann [Paessler Support] (1,320) 2 2

Last change on Jun 17, 2013 11:43:40 AM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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It seems as if it does not work at all when I use the proxy. No authentication is required and when I open the website in my browser everything works as expected.

Created on Jun 17, 2013 11:41:17 AM by  Banet GmbH (0) 1



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It would be really helpful, if we could take a look at the proxy. Could you please send an email with the proxy settings to our support team? Please mention the url to this article, so we know, what to do with the proxy.

Created on Jun 17, 2013 11:54:26 AM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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The url, you want to monitor returns a javascript, that redirected the browser to another url. The HTTP sensors(except the HTTP full webpage sensor) are not capable of following js redirects. Please either use http based redirects (302 temporarily not available) or use the url, the redirection points to, for the sensor.

Created on Jun 17, 2013 12:40:23 PM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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Thanks for this very useful information!

Created on Jun 17, 2013 12:45:17 PM by  Banet GmbH (0) 1



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We're glad, we could help!

Created on Jun 17, 2013 1:01:37 PM by  Johannes Herrmann [Paessler Support] (1,320) 2 2



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