From: Eric Wong <email@example.com> To: Jim Zhan <firstname.lastname@example.org> Cc: email@example.com Subject: Re: Unicorn configuration to increase max header size Date: Fri, 21 Nov 2014 00:31:37 +0000 [thread overview] Message-ID: <20141121003137.GA31484@dcvr.yhbt.net> (raw) In-Reply-To: <CAD6h1mi0=2b-iScdD39yeMq7xcyHV7t_esVMHH9MZMDmThFPqQ@mail.gmail.com> Jim Zhan <firstname.lastname@example.org> wrote: > Hi Eric, > > Thank you for the quick reply. I checked out hosts and we are using Unicorn > 3.4.1. Unfortunately there is only one setting for client_body_buffer_size. > So how does this parameter work? Will it only put a limitation on the body > itself or it applied proportionally to header and body (e.g., header 8k, > body 104k, etc). client_body_buffer_size in unicorn is only for request bodies (uploads), and not relevant to header sizes. > We did experiments using curl by sending header exceeding 8k manually and I > am getting 404. So it's unicorn itself, not nginx that has the 8k header > size limitation. I suspect you're hitting the nginx large_client_header_buffers default limit of 8K: http://nginx.org/en/docs/http/ngx_http_core_module.html#large_client_header_buffers I checked the unicorn source, and ext/unicorn_http/global_variables.h defines the maximum field value as 80K, 10 times more than what you're seeing: DEF_MAX_LENGTH(FIELD_VALUE, 80 * 1024); This value was inherited from Mongrel many years ago and never changed. > The command we used for the experiment: > curl -v -H "$(./http-header-pumper.bat 8000)" <service_url> I just tried your script with the following config.ru to hit unicorn directly (no nginx), and I got the expected lobster response. $ unicorn -E none config.ru ----------- config.ru ----------- require 'rack/lobster' use Rack::ContentLength run Rack::Lobster.new --------------------------------
next prev parent reply other threads:[~2014-11-21 0:31 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-11-20 21:54 Jim Zhan 2014-11-20 21:59 ` Eric Wong 2014-11-20 23:35 ` Jim Zhan 2014-11-21 0:31 ` Eric Wong [this message] 2014-11-21 1:33 ` Jim Zhan 2014-11-22 3:15 ` Jim Zhan
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