id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1369	Add proxy_detect_mime setting	https://stackoverflow.com/users/1100117/higuita		"Right now, nginx using proxy_pass will not touch the content-type and it is the upstream responsibility to sent the correct content-type.

The problem is that not always we control the upstream (external apps), have very long deployment cycles to get the proper fix in the upstream (complex upstream apps, external teams, etc) , or the upstream already have LOTs of old data that can't be easily fixed (huge S3 bucket, old DB without proper type column)

A workaround could be simply do a ""proxy_hide_header Content-Type;"" and then add a ""proxy_set_header content-type $mime"" or ""default_type $mime;"", with a map like 

map $request_uri  $mime {
 default  application/octet-stream;
 ~*\.jpe?g  image/jpeg;
 ~*\.gif  image/gif;
 ~*\.png  image/png;
}

i didn't test this solution, as it feels dirty and totally cloning the nginx mime-type detection in maps regex ... so why not expand it a little to cover this also!?

Adding a new proxy_detect_mime (off by default) would do that automatically, drop any upstream content-type header, and apply the mime detection to the uri

Most people will not use it, but might be a life saver for people that needs it"	enhancement	new	minor		nginx-core	1.13.x				"Linux serverF04 4.9.0-0.bpo.2-amd64 #1 SMP Debian 4.9.18-1~bpo8+1 (2017-04-10) x86_64 GNU/Linux
"	"nginx version: nginx/1.10.3
built with OpenSSL 1.0.2k  26 Jan 2017
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-z,relro -Wl,-z,now' --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-ipv6 --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_flv_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_mp4_module --with-http_perl_module=dynamic --with-http_random_index_module --with-http_secure_link_module --with-http_sub_module --with-http_xslt_module=dynamic --with-mail=dynamic --with-mail_ssl_module --with-stream=dynamic --with-stream_ssl_module --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/headers-more-nginx-module --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-auth-pam --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-cache-purge --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-dav-ext-module --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-development-kit --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-echo --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/ngx-fancyindex --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nchan --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-lua --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-upload-progress --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/nginx-upstream-fair --add-dynamic-module=/build/nginx-4hGAP1/nginx-1.10.3/debian/modules/ngx_http_substitutions_filter_module
"