Opened 5 months ago

Closed 3 months ago

#1799 closed defect (worksforme)

client_max_body_size ignored except at the bottom of http context

Reported by: kristian.ronningen@… Owned by:
Priority: minor Milestone:
Component: nginx-core Version: 1.14.x
Keywords: client_max_body_size context Cc:
uname -a: # uname -a Linux de01 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u3 (2019-06-16) x86_64 GNU/Linux
nginx -V: # nginx -V nginx version: nginx/1.14.1 built with OpenSSL 1.1.0f 25 May 2017 (running with OpenSSL 1.1.0j 20 Nov 2018) TLS SNI support enabled configure arguments: --with-cc-opt='-g -O2 -fdebug-prefix-map=/build/nginx-jqo7Nx/nginx-1.14.1=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Wdate-time -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -fPIC' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_dav_module --with-http_slice_module --with-threads --with-http_addition_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_xslt_module=dynamic --with-stream=dynamic --with-stream_ssl_module --with-stream_ssl_preread_module --with-mail=dynamic --with-mail_ssl_module --add-dynamic-module=/build/nginx-jqo7Nx/nginx-1.14.1/debian/modules/http-auth-pam --add-dynamic-module=/build/nginx-jqo7Nx/nginx-1.14.1/debian/modules/http-dav-ext --add-dynamic-module=/build/nginx-jqo7Nx/nginx-1.14.1/debian/modules/http-echo --add-dynamic-module=/build/nginx-jqo7Nx/nginx-1.14.1/debian/modules/http-upstream-fair --add-dynamic-module=/build/nginx-jqo7Nx/nginx-1.14.1/debian/modules/http-subs-filter (Version 1.14.1-1~bpo9+1 from Debian stretch backports)

Description

When attempting to PUT a resource of about 40MB to an nginx endpoint, the following was logged:

2019/06/26 13:45:10 [error] 17768#17768: *1 client intended to send too large body: 41011661 bytes, client: <redacted>, server: <redacted>, request: "PUT /<redacted> HTTP/1.1", host: "<redacted>"

This happened even with a setting of client_max_body_size 100M; inside the server { } context.

I also tried to put it into a location { } context, both of which should work according to the documentation, but the same error was thrown.

Setting client_max_body_size 100M; inside the http { } context worked, but only if it was the very last entry.

Some googling found people with similar experiences, but not with any explanations.

It looks like this directive is ignored unless it is placed in certain very specific locations, contrary to what the documentation says. If this is not a bug, then the documentation should be clearer.

Here's a very brief reconstruction of my config and the locations I've tried to use the client_max_body_size directive:

/etc/nginx/nginx.conf:

http {

    client_max_body_size 100M; # Not bottom of http context - is ignored

    include /etc/nginx/sites-enabled/*;

    client_max_body_size 100M; # Is used

}

/etc/nginx/sites-enabled/somesite.conf:

server {
    include /etc/nginx/conf.d/include.settings;
}

/etc/nginx/conf.d/include.settings:

client_max_body_size 100M; # In server context - is ignored

location /mylocation {
    client_max_body_size 100M; # In location context - is ignored
}

Change History (2)

comment:1 Changed 5 months ago by mdounin

Please provide full configuration which demonstrates the problem, as shown with nginx -T, and relevant request. Please avoid redacting anything - instead, please use a minimal test configuration without details you want to keep private.

comment:2 Changed 3 months ago by pluknet

  • Resolution set to worksforme
  • Status changed from new to closed

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