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From Ivan Prostran <ivan.prost...@bulb.hr>
Subject Re: Input filters that alter content-length
Date Fri, 21 Sep 2012 11:09:33 GMT
Hi,

Thanks for your prompt response.

Regards,
Ivan

On 09/21/12 13:05, Graham Leggett wrote:
> On 21 Sep 2012, at 12:41 PM, Ivan Prostran <ivan.prostran@bulb.hr> wrote:
>
>> I have the following scenario :
>>
>> - Apache/2.2.19 (Solaris 10 SPARC)
>>
>>      SetInputFilter alterxmlbody (AP_FTYPE_RESOURCE)
>>      SetHandler weblogic-handler
> First off, the users@httpd.apache.org list is a better place for this, this is the APR
list.
>
>> The handler forwards requests to multiple weblogic servers
>> and the filter itself analyzes and/or changes the POST data
>> in a way that the length of the incoming request may be changed.
>>
>> The question is :
>>
>> What is the proper and legitimate way to deal with this situation?
>>
>> Should the input filter set the new CL value in "headers_in" before
>> returning from the callback, or just remove it from the list?
>>
>> apr_off_t length;
>> apr_brigade_length     (bb,1,&length);
>> apr_table_setn(f->r->headers_in, "Content-Length", apr_off_t_toa(f->r->pool,
length));
> This is definitely wrong - a filter can expect to be called multiple times, the above
code assumes you'll be called once.
>
>> or
>>
>> apr_table_unset(f->r->headers_in, "Content-Length");
> This is the simplest way to do it, a further filter inside httpd will put Content-Length
back if practical.
>
> Look in the httpd source for examples on how filters handle this kind of thing.
>
> Regards,
> Graham
> --
>


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