Conflict between form-input-nginx-module and nginx-auth-request-module?
mdounin at mdounin.ru
Mon Mar 13 13:38:03 UTC 2017
On Sat, Mar 11, 2017 at 05:13:38AM +0000, Yongtao You via nginx wrote:
> To answer my own question, even though I still don't see why it has anything to do with the auth-request module, but the reason requests are timing out is because form-input module called ngx_http_read_client_request_body(), which then set write_event_handler to ngx_http_request_empty_handler to block write events. This seems to block the event from being forwarded to the backend (via proxy_pass). I modified the ngx_http_read_client_request_body() implementation to not override the request's write_event_handler, and everything started working. No more timeouts.
> I don't know enough to understand the ramification of my change, even though it seems to fixed my immediate problem. Any insights will be greatly appreciated.
The ngx_http_read_client_request_body() function must overwrite
request handlers, including r->write_event_handler, or an write
event while reading a request body will result in unexpected
Proper solution would be to fix the form-input module to restore
r->write_event_handler to ngx_http_core_run_phases() after the
request body has been read (and before the module calls
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