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Thanks Dounin,
After stepping through the code, I came to the same conclusion but wanted
to check just in case I missed something. Thanks for the help.
-Dk
On Fri, Sep 30, 2022 at 2:32 AM Maxim Dounin <mdounin@mdounin.ru> wrote:
> Hello!
>
> On Thu, Sep 29, 2022 at 04:47:43PM -0700, Dk Jack wrote:
>
> > Hi,
> > In my module I have a body filter. In the body filter
by
dnj0496
-
Nginx Development
Hi,
In my module I have a body filter. In the body filter, I respond with a 4XX
if the body contains a matching pattern. This is working correctly.
However, I would like to send a custom response message when the above
situation occurs. I tried doing this by attaching a buffer to the output
headers and calling send header before returning from the filter handler as
shown below.
-----------------
by
dnj0496
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Nginx Development
Hello Maxim,
Interesting thing I noticed is that this alert only happens when the
received request is HTTPv2. If the received is HTTPv1.1 and with no changes
to my module, I don't see this log message. Does this suggest something?
On Tue, May 24, 2022 at 10:23 AM Maxim Dounin <mdounin@mdounin.ru> wrote:
> Hello!
>
> On Tue, May 24, 2022 at 08:04:16AM -0700, Dk Jack wrote:
>
>
by
dnj0496
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Nginx Development
Thanks Dounin,
I will look through my code. As I said, I try not to touch nginx data structure or variables in my module. Is there a guideline document that details when a module should increment or decrement reference count value. When invoking some of these functions?
Thanks,
Dk.
> On Jul 27, 2022, at 8:05 PM, Maxim Dounin <mdounin@mdounin.ru> wrote:
>
> Hello!
&g
by
dnj0496
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Nginx Development
In my code I am not modifying the reference count. Could you let me if there any function calls if invoked would indirectly update the reference count?
Dk.
> On Jul 27, 2022, at 6:35 AM, Maxim Dounin <mdounin@mdounin.ru> wrote:
>
> Hello!
>
>> On Tue, Jul 26, 2022 at 07:21:29PM -0700, Dk Jack wrote:
>>
>> Hi,
>> I am noticing a crash in
by
dnj0496
-
Nginx Development
Forgot to add, this is with nginx version: 1.20.1
On Tue, Jul 26, 2022 at 7:21 PM Dk Jack <dnj0496@gmail.com> wrote:
> Hi,
> I am noticing a crash in my nginx module. The crash is happening after an
> internal redirect. It's not always happening but for certain requests.
> Besides the trace log I do not have much info about the request. In my
> module, I am restoring the my
by
dnj0496
-
Nginx Development
Hi,
I am noticing a crash in my nginx module. The crash is happening after an
internal redirect. It's not always happening but for certain requests.
Besides the trace log I do not have much info about the request. In my
module, I am restoring the my module context in a similar fashion as the `
ngx_http_realip_get_module_ctx`. What I noticed is `r->pool == 0`. Why
would the r->pool be ever ze
by
dnj0496
-
Nginx Development
Maxim,
I am noticing this with our modules. Although, we do not do not message
with any nginx reference counting etc.
At most, we are sending 403-forbidden for some requests. Could you suggest
some ways about debugging this?
Thanks.
Bhasker.
------------------------------------------------------------------------
This alert means that request reference counting is incorrect, and
this is serious
by
dnj0496
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Nginx Development
Hi,
What is the significance of this alert in ngx_http_close_request
if (r->count == 0) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0, "http request count is
zero");
}
I am seeing this alert in my logs in some cases.
Dk.
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by
dnj0496
-
Nginx Development
Thank you. Last few questions to complete my understanding?
Were the module body filter callbacks being invoked even when
content_length_n <= 0 prior to 7913:185c86b830ef change?
Is the nginx body handling a store-and-forward architecture where it waits
for the entire body or does it forward pkts as and when it receives
(especially when dealing with large bodies).
What is the behavior of las
by
dnj0496
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Nginx Development
Thanks Maxim,
Are there any other situations where last_buf would not be set besides the
case of content-length being zero?
On Wed, Jan 26, 2022 at 5:23 PM Maxim Dounin <mdounin@mdounin.ru> wrote:
> Hello!
>
> On Wed, Jan 26, 2022 at 04:55:52PM -0800, Dk Jack wrote:
>
> > Hi,
> > in my module I am inspecting the request body and making certain
> > decisions su
by
dnj0496
-
Nginx Development
Hi,
in my module I am inspecting the request body and making certain
decisions such as sending a 403 based on the content in the body. I based
my implementation based on the examples in the documentation and other
nginx modules.
http://nginx.org/en/docs/dev/development_guide.html#http_request_body_filters
Sometimes, when my body_filter handler is invoked, I accumulate the body
into a single buff
by
dnj0496
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Nginx Development
That is exactly what I needed. Thank you.
Dk.
On Sat, Jan 22, 2022 at 11:08 AM Maxim Dounin <mdounin@mdounin.ru> wrote:
> Hello!
>
> On Sat, Jan 22, 2022 at 02:19:05AM -0800, Dk Jack wrote:
>
> > Maxim,
> > Thanks for responding to my query. I am passing the original context
> > pointer to the clean up handler. When my cleanup handler is called I am
> >
by
dnj0496
-
Nginx Development
Maxim,
Thanks for responding to my query. I am passing the original context
pointer to the clean up handler. When my cleanup handler is called I am
retrieving the context pointer to clean up external resources. Based on
your response, the pointer saved in the cleanup handler should still be
valid and should be still safe to use and no memory/resources will be
leaked if I use that pointer to cleanu
by
dnj0496
-
Nginx Development
Hi,
I have a question related to internal redirect, I am hoping someone from
this forum can clarify. The email is a bit long since I wanted to provide
enough background for my situation.
In my module, I am creating my module context and saving some state. Some
of this state is allocated using ngx_palloc. I am releasing this memory by
adding a pool clean up handler.
In my module, for certain requ
by
dnj0496
-
Nginx Development
Thanks Maxim,
Thanks for the suggestion about using ngx_pool_cleanup_add. Since this is
external library memory I couldn't use ngx_pcalloc. Thanks again.
On Wed, Nov 10, 2021 at 7:47 PM Maxim Dounin <mdounin@mdounin.ru> wrote:
> Hello!
>
> On Wed, Nov 10, 2021 at 07:22:50PM -0800, Dk Jack wrote:
>
> > Hi,
> > In my module, I am allocating some memory for each reques
by
dnj0496
-
Nginx Development
Hi,
In my module, I am allocating some memory for each request and saving the
ptr in my module context. I am registering a callback using
ngx_http_cleanup_add to perform cleanup for each request. I am releasing
the memory for the allocation in the cleanup callback. In the log phase, I
want to make available the contents of the memory I allocated as an nginx
variable.
However, when I try to print
by
dnj0496
-
Nginx Development
I haven't played with them myself, but have considered sub-requests? Since
your are using a library with its own event-loop, perhaps it's best to run
it in its own process and use nginx sub-requests to bridge the two
processes? Seems doable.
https://nginx.org/en/docs/dev/development_guide.html#http_subrequests
Dk.
On Wed, Oct 6, 2021 at 12:53 PM Eran Kornblau <eran.kornblau@kaltura.com>
wr
by
dnj0496
-
Nginx Development
Hi,
I am seeing an alert in the nginx error.log with the message "http request
count is zero". It seems to be from this code in
src/http/ngx_http_request.c:
if (r->count == 0) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0, "http request count is zero");
}
These alerts are showing up for requests that receive a NGX_HTTP_FORBIDDEN
from my module. What does it mean when "
by
dnj0496
-
Nginx Development
Hello Maxim,
Thanks for responding. My configuration to determine if I should inspect
the body or not is not part of the location config since it's dynamic and I
am receiving this config from an external app. The configuration is updated
asynchronously. My module matches the requests against this external
information and then enables the body filter. Not sure if I can use the
location configuratio
by
dnj0496
-
Nginx Development
Hi,
In my module, I am inspecting the request body. My body filter init code is
shown below:
int
module_body_filter_init(ngx_conf_t *cf)
{
ngx_http_next_body_filter = ngx_http_top_request_body_filter;
ngx_http_top_request_body_filter = nginx_module_inspect_body_filter;
return NGX_OK;
}
Even though I have the above initialization, I do not want to inspect the
body for all requests. I figur
by
dnj0496
-
Nginx Development
Hello Maxim,
could you please respond to my previous message. Thanks.
Dk.
On Tue, Jul 13, 2021 at 9:28 PM Dk Jack <dnj0496@gmail.com> wrote:
> Hello Maxim,
> Thanks for responding. Can I get some clarification on what you mean by
> the statement below:
>
> "More flexibility can be achieved by reading the request body
> earlier - for example, you can do this from you
by
dnj0496
-
Nginx Development
Hello Maxim,
Thanks for responding. Can I get some clarification on what you mean by the
statement below:
"More flexibility can be achieved by reading the request body
earlier - for example, you can do this from your own module, or
with embedded scripting such as perl or njs."
Are you suggesting that I use ngx_http_read_client_request_body api in my
module?
http://nginx.org/en/docs/de
by
dnj0496
-
Nginx Development
Hi,
In my module, I am trying to take actions based on the content of the body.
To accomplish this, I am capturing the body using body file as shown in the
example below:
http://mdounin.ru/hg/ngx_http_catch_body_filter_module/file/tip/ngx_http_catch_body_filter_module.c
This is working well. I can inspect the contents of the body and take
different actions like rejecting requests etc. However, o
by
dnj0496
-
Nginx Development
Hi,
I have a module. I am saving some data in my module context. However, in
certain cases, I am doing an internal redirect. When I do an internal
redirect my context is cleared as per the nginx development guide. Is there
a way to save the context data. Since this data is specific to the request,
I want to save it in the ngx_http_request_t if possible.
My current solution is to save it as header
by
dnj0496
-
Nginx Development
http2. - 4 years ago
Hi,
I am trying to understand how the modules work when dealing with http2
traffic? Trying to find any documentation or any other info that will
tells me how a module should behave when handling http2 traffic. I am
assuming the actual http2 protocol parsing is done by the http2 module. How
can a module access the headers, params, body and other data in the
request/response? Any info is greatly app
by
dnj0496
-
Nginx Development
Hi,
Could someone respond to my question. Is it even possible to implement a
module that meets my requirements (which I listed in my earlier post). Any
response is greatly appreciated. Thanks.
On Wed, Jul 24, 2019 at 11:07 PM Dk Jack <dnj0496@gmail.com> wrote:
> Hi,
> In my module I have the following requirements:
>
> - Inspect the contents of the POST body in the request
>
by
dnj0496
-
Nginx Development
Hi,
In my module I have the following requirements:
- Inspect the contents of the POST body in the request
- If the body content matches the configured regex, then take one of the
following actions:
- Return forbidden
- Redirect to another location without using 302
- If the content doesn't match the configured regex, then simply forward
the request to proxy_pass destination.
I used 'ngx_htt
by
dnj0496
-
Nginx Development
I was able to resolve this by invoking finalize_request.
On Wed, Jul 24, 2019 at 4:14 PM Dk Jack <dnj0496@gmail.com> wrote:
> Could someone comment on my question below. What does it mean when the
> connections are stuck in 'Writing' state? Since the client has received the
> response, why is the nginx still stuck trying to write something. Any help
> in debugging or what to lo
by
dnj0496
-
Nginx Development
Could someone comment on my question below. What does it mean when the
connections are stuck in 'Writing' state? Since the client has received the
response, why is the nginx still stuck trying to write something. Any help
in debugging or what to look for is greatly appreciated. Thanks.
Dk.
On Tue, Jul 23, 2019 at 6:17 PM Dk Jack <dnj0496@gmail.com> wrote:
> Hi,
> In my module, I am
by
dnj0496
-
Nginx Development
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