Re: [squid-users] Custom rules to analyze HTTP headers

Amos Jeffries escribió:
>>>> Hi there!
>>>>
>>>> I'm requiring to create custom access rules for Squid so that I can
>>>> analyze the HTTP headers looking for a internal forward flag in which
>>>> the original IP of the request rests. This is because I'm using a CDN,
>>>> and they bring it in a custom-defined HTTP header.
>>>>
>>>>
>>> You mean X-Forwarded-For: or that they have created some custom
>>> alternative that re-writes all that functionality?
>>>
>>> If they have then acl type req_header is what you are looking for.
>>> Otherwise the basic forwarded-for handling functionality is built into
>>> Squid.
>>>
>>>
>> Helo Amos!
>> Thanks for answering that soon!
>>
>> I'm afraid it's not the beloved X-Forwarded-For header. This CDN sets a
>> few headers by their own, and their are completely custom.
>>
>> What I was looking for was a way to analyze the HTTP Headers coming from
>> them and perform certain types of operations, like comparing them
>> against a blacklist, add them into buckets, or stuff like that.
>>
>> Unfortunately I was not able to find the way to do it using
>> url_rewrite_program, in case it does support it.
>>
>>
>
> That is where the second paragraph I wrote comes in:
>
> acl cdnCustomHeader req_header ^Foo:.something
>
> amos
>
Hi Amos!

Sorry for the delay.

That's right, for that very special case, req_header would work just as
you mention. But I was looking for something more similar to what
url_rewrite_program does, so I can perform some kind of scripting for
analyzing HTTP packages.

Unfortunately, it appears to me that url_rewrite_program doesn't pass
much information above from IP, URL and some other stuff :-(

Greetings,

Dererk

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