id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1020	Allow proxy_http_version to use variables	whitlockjc@…		"I would like to conditionally set the `proxy_http_version` such that the requested HTTP version is used for the upstream request instead of locking it down to `1.0` or `1.1`.  My attempts at doing this have failed because `proxy_http_version` does not allow you to use a variable to set its value.  Here was what I thought was the intuitive approach to this:

{{{
events {}
http {
  map $http_version $proxy_http_version {
    default 1.0;
    ""1.1""   1.1;
  }

  proxy_http_version $proxy_http_version;

  server {
    listen 9999 default_server;
    return 444;
  }
}
daemon on;
}}}

Of course, that results in the following error: `nginx: [warn] invalid value ""$proxy_http_version"" in /etc/nginx/nginx.conf:8`, which is because the variable is a string but `proxy_http_version`  If `proxy_http_version` was allowed to be set via a variable value, I could use the same HTTP version of the request for the upstream request.

I also tried a different version using `if` but `proxy_http_version` isn't allowed in an `if` either so both attempts at solving this have failed.  I worried about setting `proxy_http_version` to `1.1` always to work around the known issues I'm facing ''(WebSockets and streaming APIs)'' but maybe that's the only solution?"	enhancement	closed	minor		nginx-module	1.6.x	wontfix	proxy proxy_pass proxy_http_version		Linux testing-946235561-bc338 4.2.2-coreos-r2 #2 SMP Fri Jan 22 06:06:09 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.6.2
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro' --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_image_filter_module --with-http_spdy_module --with-http_sub_module --with-http_xslt_module --with-mail --with-mail_ssl_module --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-auth-pam --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-dav-ext-module --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-echo --add-module=/build/buildd/nginx-1.6.2/debian/modules/nginx-upstream-fair --add-module=/build/buildd/nginx-1.6.2/debian/modules/ngx_http_substitutions_filter_module"