Mailing List Archive: Lua r:requestbody() removes HTTP request body

Lua r:requestbody() removes HTTP request body

Nov 29, 2022, 7:45 AM

Post #1 of 3 (228 views)

Hi,

I trying to read every HTTP request message body (Apache httpd
2.4.5/Debian 9.5) where content type is equal to 'text/xml'. For this
purpose I use a Lua handler script during the request translation phase
using the directive 'LuaHookTranslateName'
(https://publib.boulder.ibm.com/httpserv/manual24/mod/mod_lua.html#luahooktranslatename).

This Lua handler script uses the function 'r:requestbody()' defined in
the reference manual section 'Built in function'
(https://publib.boulder.ibm.com/httpserv/manual24/mod/mod_lua.html#functions).
This method reads and returns the body of the HTTP request but it also
REMOVES the body of the request.

Is this bug reported?

Does exist any other request body reading function alternative?

I couldn't find any alternative in the 'lua_module' reference
documentation.

Thanks,

Bruno.

--
bruno.mendoza@ikeasi.com
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010000100110100101110100011000100110111101111000

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Re: Lua r:requestbody() removes HTTP request body [ In reply to ]

covener at gmail

Nov 29, 2022, 7:56 AM

Post #2 of 3 (228 views)

Permalink

On Tue, Nov 29, 2022 at 10:45 AM bruno.mendoza <bruno.mendoza@ikeasi.com> wrote:
>
>
> Hi,
>
> I trying to read every HTTP request message body (Apache httpd
> 2.4.5/Debian 9.5) where content type is equal to 'text/xml'. For this
> purpose I use a Lua handler script during the request translation phase
> using the directive 'LuaHookTranslateName'
> (https://publib.boulder.ibm.com/httpserv/manual24/mod/mod_lua.html#luahooktranslatename).
>
> This Lua handler script uses the function 'r:requestbody()' defined in
> the reference manual section 'Built in function'
> (https://publib.boulder.ibm.com/httpserv/manual24/mod/mod_lua.html#functions).
> This method reads and returns the body of the HTTP request but it also
> REMOVES the body of the request.
>
> Is this bug reported?

Give https://httpd.apache.org/docs/current/mod/mod_request.html a try,
it is a way to opt-in to buffering the request body so it can be read
multiple times.

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Re: Lua r:requestbody() removes HTTP request body [ In reply to ]

bruno.mendoza at ikeasi

Nov 30, 2022, 2:23 AM

Post #3 of 3 (226 views)

Permalink

El 2022-11-29 15:56, Eric Covener escribió:
> On Tue, Nov 29, 2022 at 10:45 AM bruno.mendoza
> <bruno.mendoza@ikeasi.com> wrote:
>>
>>
>> Hi,
>>
>> I trying to read every HTTP request message body (Apache httpd
>> 2.4.5/Debian 9.5) where content type is equal to 'text/xml'. For this
>> purpose I use a Lua handler script during the request translation
>> phase
>> using the directive 'LuaHookTranslateName'
>> (https://publib.boulder.ibm.com/httpserv/manual24/mod/mod_lua.html#luahooktranslatename).
>>
>> This Lua handler script uses the function 'r:requestbody()' defined in
>> the reference manual section 'Built in function'
>> (https://publib.boulder.ibm.com/httpserv/manual24/mod/mod_lua.html#functions).
>> This method reads and returns the body of the HTTP request but it also
>> REMOVES the body of the request.
>>
>> Is this bug reported?
>
> Give https://httpd.apache.org/docs/current/mod/mod_request.html a try,
> it is a way to opt-in to buffering the request body so it can be read
> multiple times.

Hi Eric,

I tried:

""
<VirtualHost *:80>

[...]

<LocationMatch "^/<affected_url_segment>">
KeptBodySize 10240
</LocationMatch>

LuaHookTranslateName "/some/location/script.lua" handle

[...]

</VirtualHost>
""

But the result is the same. After calling mod_lua 'r:requestbody()'
function the request body is removed.

I'm "proxying" HTTP requests to another HTTP service.

Does exist another way of using "mod_request"?

Thanks for your answers.

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