Hi, Aleks,

The result of nginx -V is as follow:
nginx version: nginx/1.11.1
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.1t 3 May 2016
TLS SNI support enabled
configure arguments: --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 --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_addition_module --with-http_dav_module --with-http_geoip_module --with-http_gzip_static_module --with-http_sub_module --with-http_v2_module --with-http_spdy_module --with-stream --with-stream_ssl_module --with-threads --with-file-aio --without-mail_pop3_module --without-mail_smtp_module --without-mail_imap_module --without-http_uwsgi_module --without-http_scgi_module --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --add-module=/tmp/build/ngx_devel_kit-0.3.0 --add-module=/tmp/build/set-misc-nginx-module-0.30 --add-module=/tmp/build/nginx-module-vts-0.1.9 --add-module=/tmp/build/lua-nginx-module-0.10.5 --add-module=/tmp/build/headers-more-nginx-module-0.30 --add-module=/tmp/build/nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d --add-module=/tmp/build/nginx-http-auth-digest-f85f5d6fdcc06002ff879f5cbce930999c287011 --add-module=/tmp/build/ngx_http_substitutions_filter_module-bc58cb11844bc42735bbaef7085ea86ace46d05b --add-module=/tmp/build/lua-upstream-nginx-module-0.05

The nginx conf is:


daemon off;

worker_processes 2;

pid /run/nginx.pid;

worker_rlimit_nofile 131072;

pcre_jit on;

events {
multi_accept on;
worker_connections 16384;
use epoll;
}

http {

lua_shared_dict server_sessioncnt_dict 20k;
lua_shared_dict server_dict 20k;
lua_shared_dict server_acceptnewconn_dict 20k;
lua_shared_dict sessionid_server_dict 100k;



real_ip_header X-Forwarded-For;
set_real_ip_from 0.0.0.0/0;
real_ip_recursive on;




geoip_country /etc/nginx/GeoIP.dat;
geoip_city /etc/nginx/GeoLiteCity.dat;
geoip_proxy_recursive on;
vhost_traffic_status_zone shared:vhost_traffic_status:10m;
vhost_traffic_status_filter_by_set_key $geoip_country_code country::*;
# lua section to return proper error codes when custom pages are used
lua_package_path '.?.lua;./etc/nginx/lua/?.lua;/etc/nginx/lua/vendor/lua-resty-http/lib/?.lua;/etc/nginx/lua/vendor/lua-resty-lrucache/lib/?.lua;/etc/nginx/lua/vendor/lua-resty-core/lib/?.lua;/etc/nginx/lua/vendor/lua-resty-balancer/lib/?.lua;';

init_by_lua_file /etc/nginx/lua/init_by_lua.lua;

sendfile on;
aio threads;
tcp_nopush on;
tcp_nodelay on;

log_subrequest on;

reset_timedout_connection on;

keepalive_timeout 75s;

types_hash_max_size 2048;
server_names_hash_max_size 512;
server_names_hash_bucket_size 64;

include /etc/nginx/mime.types;
default_type text/html;
gzip on;
gzip_comp_level 5;
gzip_http_version 1.1;
gzip_min_length 256;
gzip_types application/atom+xml application/javascript aplication/x-javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/svg+xml image/x-icon text/css text/plain text/x-component;
gzip_proxied any;

client_max_body_size "64m";

log_format upstreaminfo '$remote_addr - '
'[$proxy_add_x_forwarded_for] - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" '
'$request_length $request_time $upstream_addr $upstream_response_length $upstream_response_time $upstream_status';



map $request $loggable {
default 1;
}

access_log /var/log/nginx/access.log upstreaminfo if=$loggable;
error_log /var/log/nginx/error.log notice;



map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}

# trust http_x_forwarded_proto headers correctly indicate ssl offloading
map $http_x_forwarded_proto $pass_access_scheme {
default $http_x_forwarded_proto;
'' $scheme;
}

# Map a response error watching the header Content-Type
map $http_accept $httpAccept {
default html;
application/json json;
application/xml xml;
text/plain text;
}

map $httpAccept $httpReturnType {
default text/html;
json application/json;
xml application/xml;
text text/plain;
}

server_name_in_redirect off;
port_in_redirect off;

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

# turn on session caching to drastically improve performance

ssl_session_cache builtin:1000 shared:SSL:10m;
ssl_session_timeout 10m;


# allow configuring ssl session tickets
ssl_session_tickets on;

# slightly reduce the time-to-first-byte
ssl_buffer_size 4k;


# allow configuring custom ssl ciphers
ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
ssl_prefer_server_ciphers on;




# In case of errors try the next upstream server before returning an error
proxy_next_upstream error timeout invalid_header http_502 http_503 http_504;

upstream liupeng-sm-rte-svc-13080 {
server 172.77.69.10:13080;
server 172.77.87.9:13080;




balancer_by_lua_file /etc/nginx/lua/balancer_by_lua.lua;

}

server {
server_name _;
listen 80;
listen 443 ssl spdy http2;

# PEM sha: aad58c371e57f3c243a7c8143c17762c67a0f18a
ssl_certificate /etc/nginx-ssl/system-snake-oil-certificate.pem;
ssl_certificate_key /etc/nginx-ssl/system-snake-oil-certificate.pem;

more_set_headers "Strict-Transport-Security: max-age=15724800; includeSubDomains; preload";

vhost_traffic_status_filter_by_set_key $geoip_country_code country::$server_name;









location /SM/ui {






proxy_set_header Host $host;

# Pass Real IP
proxy_set_header X-Real-IP $remote_addr;

# Allow websocket connections
proxy_set_header Upgrade $http_upgrade;

proxy_set_header Connection "";


proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Port $server_port;
proxy_set_header X-Forwarded-Proto $pass_access_scheme;

# mitigate HTTPoxy Vulnerability
# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
proxy_set_header Proxy "";

proxy_connect_timeout 5s;
proxy_send_timeout 60s;
proxy_read_timeout 60s;

proxy_redirect off;

proxy_buffering off;

proxy_http_version 1.1;


proxy_pass http://liupeng-sm-rte-svc-13080;


rewrite_by_lua_file /etc/nginx/lua/rewrite_by_lua.lua;

header_filter_by_lua_file /etc/nginx/lua/header_filter_by_lua.lua;


}


}
}


----- 原始邮件 -----
发件人：Aleksandar Lazic <al-nginx@none.at>
收件人：tjlp@sina.com
抄送人：nginx <nginx@nginx.org>
主题：Re:_回复：Re:_回复：Re:_回复：Re:_Issue_about_nginx_removing_the_header_"Connection"_in_HTTP_response?
日期：2017年03月07日 15点39分


Hi Liu Peng.
We still don't know your nginx version nor your config!
Cite from below:
> So now the standard Questions from me:
> What's the output of nginx -V ?
> What's your config?
regards
aleks
Am 07-03-2017 02:37, schrieb tjlp@sina.com:
> Hi, Alexks,
>
> I try your proposal and it doesn't work. Actually my issue is the same
> as this one
> http://stackoverflow.com/questions/5100971/nginx-and-proxy-pass-send-connection-close-headers.
>
> 1. I add "keeplive_request 0". The result is that the "Connection:
> close" header is sent to client for every response. That does not match
> my requirement. Our application decides whether to finish the
> application session using this header.
>
> 2. I add "proxy_pass_header Connection". Nginx keeps sending
> "Connection: keep-alive" header to client even the header is
> "Connection: close" from upstream server.
>
> Seems Nginx has some special handling for the Connection header in
> response. The openresty author suggests that the only way for changing
> response header change the nginx C code for this issue. See this issue:
> https://github.com/openresty/headers-more-nginx-module/issues/22#issuecomment-31585052.
>
> Thanks
> Liu Peng
>
> ----- 原始邮件 -----
> 发件人：Aleksandar Lazic <al-nginx@none.at>
> 收件人：tjlp@sina.com
> 抄送人：nginx <nginx@nginx.org>
> 主题：Re:_回复：Re:_回复：Re:_Issue_about_nginx_removing_the_header_"Connection"_in_HTTP_response?
> 日期：2017年03月04日 17点22分
>
> Hi Liu Peng.
> Am 04-03-2017 09:12, schrieb tjlp@sina.com:
>>
>> Hi, Alexks,
>>
>> I don't want to hide the header.
>> My problem is that Nginx change the "Connection: close" header in the
>> reponse from upstream server to "Connction: keep-alive" and send to
>> client. I want to keep the original "Connection: close" header.
> Ah that's a clear question.
> It took us only 3 rounds to get to this clear question ;-)
> So now the standard Questions from me:
> What's the output of nginx -V ?
> What's your config?
> Maybe you have set 'keepalive' in the upstream config
> http://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive
> or
> 'proxy_http_version 1.1;'
> http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_http_version
> as a last resort you can just pass the header with
> 'proxy_pass_header Connection;'.
> http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_pass_header
> Choose the solution which fit's to your demand.
> I can only guess due to the fact that we don't know your config.
> May I ask you to take a look into this document, which exists in
> several
> languages, thank you very much.
> http://www.catb.org/~esr/faqs/smart-questions.html
> Best regards
> Aleks
>> Thanks
>> Liu Peng
>>
>> ----- 原始邮件 -----
>> 发件人：Aleksandar Lazic <al-nginx@none.at>
>> 收件人：tjlp@sina.com
>> 抄送人：nginx <nginx@nginx.org>
>> 主题：Re:_回复：Re:_Issue_about_nginx_removing_the_header_"Connection"_in_HTTP_response?
>> 日期：2017年03月03日 16点19分
>> Hi.
>>
>> then one directive upward.
>>
>> http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_hide_header
>>
>> Cheers
>>
>> aleks
>>
>> Am 03-03-2017 06:00, schrieb tjlp@sina.com:
>>
>>> Hi,
>>>
>>> What I mention is the header in response from backend server. Your
>>> answer about proxy_set_header is the "Connection" header in request.
>>>
>>> Thanks
>>> Liu Peng
>>>
>>> ----- 原始邮件 -----
>>> 发件人：Aleksandar Lazic <al-nginx@none.at>
>>> 收件人：nginx@nginx.org
>>> 抄送人：tjlp@sina.com
>>> 主题：Re: Issue about nginx removing the header "Connection" in HTTP
>>> response?
>>> 日期：2017年03月03日 06点25分
>>>
>>> Hi.
>>> Am 01-03-2017 08:29, schrieb tjlp@sina.com:
>>>> Hi, nginx guy,
>>>>
>>>> In our system, for some special requests, the upstream server will
>>>> return a response which the header includes "Connection: Close".
>>>> According to HTTP protocol, "Connection" is one-hop header.
>>>> So, nginx will remove this header and the client can't do the
>>>> business
>>>> logic correctly.
>>>>
>>>> How to handle this scenario?
>>> you mean something like this?
>>> http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_set_header
>>> If the value of a header field is an empty string then this field
>>> will
>>> not be passed to a proxied server:
>>> proxy_set_header Connection "";
>>>> Thanks
>>>> Liu Peng
>>>> _______________________________________________
>>>> nginx mailing list
>>>> nginx@nginx.org
>>>> http://mailman.nginx.org/mailman/listinfo/nginx
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