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From Torsten Krah <krah...@gmail.com>
Subject Re: [users@httpd] Control / Modify the HTTP Status Line
Date Wed, 22 May 2019 20:42:21 GMT
Hi,

you could use a mod_perl output filter handler to rewrite the response to
your needs based on the input.
Did that for some specific SaaS years ago and for some response with e.g. a
special header the filter answered somerhing totally different and
discarded the original response.

Happy coding :-)

Cheers

Shmuel Krakower <shmulikk@gmail.com> schrieb am Mi., 22. Mai 2019, 22:29:

> Hi matt and lbutlr
> Thanks for the response.
>
> I guess I should add few pieces of information.
> The client is one SaaS and the backend is another SaaS. The backend
> returns 302 which is right but the client consider anything which is not
> 2xx as error which cause it to retry.
>
> Therefore I must "hack" or stitch it with a proxy. I am using mod_proxy.
> My other alternative is to use other software than httpd to stitch those
> two services and show 200 instead of the 302.
>
> The solution mentioned in stackoverflow will not work for 302 response as
> I cannot set error page for such non-error response codes.
>
> The solution with rewrite won't work neither as I need to alter the
> response and not the request.
>
>
> On Wed, May 22, 2019, 10:37 PM Muggeridge, Matt <matt.muggeridge2@hpe.com>
> wrote:
>
>> With a little googling, this technique looks promising…
>> https://stackoverflow.com/questions/15083481/how-can-i-replace-apache-http-code-404-to-200
>>
>>
>>
>>    - As I cannot alter the backend behaviour
>>
>>
>>
>> Yet, you talk about using mod_substitute and mod_header to alter the
>> server’s behaviour.  If the 302 responses are not valid, then hunt down and
>> fix/remove the ‘redirect’ configuration options in either a .htaccess or
>> some other configuration file.
>>
>>
>>
>> Matt.
>>
>>
>>
>> *From:* Shmuel Krakower <shmulikk@gmail.com>
>> *Sent:* Thursday, 23 May 2019 4:00 AM
>> *To:* users@httpd.apache.org
>> *Subject:* [users@httpd] Control / Modify the HTTP Status Line
>>
>>
>>
>> Hello,
>>
>> This is my first message on this user list, hope that's the right place
>> for my question.
>>
>>
>>
>> I am using Apache for proxying a backend server.
>>
>> The backend server may return, in some occaisons, a 302 response code for
>> successful requests.
>>
>> As I cannot alter the backend behavior nor the client's to consider such
>> 302 responses as successful, I am looking for a way to manipulate the
>> response code on Apache.
>>
>>
>>
>> While going through the options in and trying ways to alter data which is
>> sent back to clients I found two:
>>
>> 1. mod_substitute - to manipulate respose body.
>>
>> 2. mod_header - to manipulate respose headers.
>>
>>
>>
>> The problem is that the HTTP Status Line (the very first line returned by
>> apache) cannot be altered by neither of these modules.
>>
>> I was also trying to set the response code in various response headers
>> but none seem to make any affect on the Status Line contents.
>>
>>
>>
>> Does anyone know of a way to manipulate the HTTP Status Line or how to
>> internal process of apache works to determine the Status Line (maybe this
>> way I can cause it to generate a different status line).
>>
>>
>>
>> Thanks,
>>
>> Shmuel Krakower.
>>
>

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