tomcat jsp HTTP_REFER returning null;

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koshy - 19 Jul 2006 12:42 GMT

I am having a problem where a call to request.getHeader("HTTP_REFERER")
is returning null;
I have tried the following

HTTP_REFERER
Http_Referer
http_referer
REFERER
referer

Is there a solution?
Why is referer always returning null;
On my watch window I cannot find a header with any of the above
headerNames.
How can I find who is the referer?
regards
Koshyh

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Alexander - 19 Jul 2006 13:29 GMT

> I am having a problem where a call to request.getHeader("HTTP_REFERER")
> is returning null;
[quoted text clipped - 13 lines]
> regards
> Koshyh

You can get the referrer via

request.getHeader("referer")

However you should note that it isnt a mandatory field and usually only
available if the client sends it at all respectively if the request
originates from a link. Direct requests do not contain a referrer.

Alexander

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Moiristo - 19 Jul 2006 19:58 GMT

>> I am having a problem where a call to request.getHeader("HTTP_REFERER")
>> is returning null;
[quoted text clipped - 21 lines]
> available if the client sends it at all respectively if the request
> originates from a link. Direct requests do not contain a referrer.

Besides, most firewalls automatically remove the referer header. It is
better to find a workaround, like using sessions or something.

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tomcat jsp HTTP_REFER returning null;

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