processing a request without body

[Muhammad Nuzaihan]

Thanks Maxim, Vasility,

The problem i was going to solve is to i needed to run my specific
function that takes  the data of request URL path, Headers and request
body and determine and validate that all that data is correct before
sending upstream, or else i would deny the request with 4xx code
errors.

Handlers can only handle (from what i know) URL path and headers.

Request body requires a request chain (ngx_chain_t)) to piece out the
request body and handlers doesn't seem to have t ngx_chain_t unlike
request body filters.

Or maybe i am wrong in this case?

Thank you,
Muhammad Nuzaihan


On Thu, Dec 14, 2023 at 4:01 AM Vasiliy Soshnikov
<vasiliy.soshnikov at gmail.com> wrote:
>
> Sorry I'm bad. I understood that header filters won't help you. Use the ACCESS PHASE handler, it should work fine for you.
>
> On Wed, Dec 13, 2023 at 10:57 PM Vasiliy Soshnikov <vasiliy.soshnikov at gmail.com> wrote:
>>
>> Hello,
>>
>> > Is there something similar done before?
>> I'm thinking that you would like to test the incoming path and execute some logic.
>>
>> You could use a header filter for that and also you could keep a body filter for handling the request body.
>> Also pls take a look into PHASEs, I'm thinking you could try to add your own ACCESS PHASE.
>>
>> And the last one: for keeping your context (some variables or data) for this request between filters, phases you could use request's context.
>>
>> Probably, examples would help you: https://github.com/dedok/nginx-tutorials
>>
>>
>> On Wed, Dec 13, 2023 at 10:56 AM Muhammad Nuzaihan <zaihan at unrealasia.net> wrote:
>>>
>>> Hi,
>>>
>>> I need to process requests with only URI path (without body) for a module.
>>>
>>> It seems ngx_http_request_body_filter_pt is *not* executed whenever
>>> there is a request without a body (it looked like it bypassed without
>>> request body) and only ngx_http_output_body_filter_pt  part of the
>>> code is executed.
>>>
>>> For example i do a request curl curl like this:
>>>
>>> curl -vvvv -X POST http://localhost:8080/proxy/profile/alice/comment
>>>
>>> and i need to validate /proxy/profile/alice/comment in my module and
>>> there is no http headers and no body. Only URI path.
>>>
>>> Is there something similar done before?
>>>
>>> Thank you,
>>> Muhammad Nuzaihan
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>>> nginx-devel at nginx.org
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>
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