Hi,

I'm trying to implement conditional requests in Django-hotsauce and
would like to use HTTP_IF_NONE_MATCH to return a 304 Not Modified
response. However in nginx the value of HTTP_IF_NONE_MATCH is incorrect
(a empty string is returned).

Here's my nginx config:

# configuration file /etc/nginx/nginx.conf:
user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
worker_connections 512;
multi_accept on;
use epoll;
}

http {

##
# Basic Settings
##

sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 80;
types_hash_max_size 2048;
# server_tokens off;

# server_names_hash_bucket_size 64;
# server_name_in_redirect off;

include /etc/nginx/mime.types;
default_type application/octet-stream;

##
# SSL Settings
##

ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;

##
# Logging Settings
##

access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;

##
# Gzip Settings
##

gzip on;
gzip_disable "msie6";

# gzip_vary on;
# gzip_proxied any;
# gzip_comp_level 6;
# gzip_buffers 16 8k;
# gzip_http_version 1.1;
# gzip_types text/plain text/css application/json
application/javascript text/xml application/xml application/xml+rss
text/javascript;

##
# Virtual Host Configs
##

include /etc/nginx/conf.d/development.conf;
#include /etc/nginx/sites-enabled/*;
}


#mail {
# # See sample authentication script at:
# # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
# # auth_http localhost/auth.php;
# # pop3_capabilities "TOP" "USER";
# # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
# server {
# listen localhost:110;
# protocol pop3;
# proxy on;
# }
#
# server {
# listen localhost:143;
# protocol imap;
# proxy on;
# }
#}

# configuration file /etc/nginx/mime.types:

types {
text/html html htm shtml;
text/css css;
text/xml xml;
image/gif gif;
image/jpeg jpeg jpg;
application/javascript js;
application/atom+xml atom;
application/rss+xml rss;

text/mathml mml;
text/plain txt;
text/vnd.sun.j2me.app-descriptor jad;
text/vnd.wap.wml wml;
text/x-component htc;

image/png png;
image/tiff tif tiff;
image/vnd.wap.wbmp wbmp;
image/x-icon ico;
image/x-jng jng;
image/x-ms-bmp bmp;
image/svg+xml svg svgz;
image/webp webp;

application/font-woff woff;
application/java-archive jar war ear;
application/json json;
application/mac-binhex40 hqx;
application/msword doc;
application/pdf pdf;
application/postscript ps eps ai;
application/rtf rtf;
application/vnd.apple.mpegurl m3u8;
application/vnd.ms-excel xls;
application/vnd.ms-fontobject eot;
application/vnd.ms-powerpoint ppt;
application/vnd.wap.wmlc wmlc;
application/vnd.google-earth.kml+xml kml;
application/vnd.google-earth.kmz kmz;
application/x-7z-compressed 7z;
application/x-cocoa cco;
application/x-java-archive-diff jardiff;
application/x-java-jnlp-file jnlp;
application/x-makeself run;
application/x-perl pl pm;
application/x-pilot prc pdb;
application/x-rar-compressed rar;
application/x-redhat-package-manager rpm;
application/x-sea sea;
application/x-shockwave-flash swf;
application/x-stuffit sit;
application/x-tcl tcl tk;
application/x-x509-ca-cert der pem crt;
application/x-xpinstall xpi;
application/xhtml+xml xhtml;
application/xspf+xml xspf;
application/zip zip;

application/octet-stream bin exe dll;
application/octet-stream deb;
application/octet-stream dmg;
application/octet-stream iso img;
application/octet-stream msi msp msm;

application/vnd.openxmlformats-officedocument.wordprocessingml.document
docx;
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet xlsx;
application/vnd.openxmlformats-officedocument.presentationml.presentation
pptx;

audio/midi mid midi kar;
audio/mpeg mp3;
audio/ogg ogg;
audio/x-m4a m4a;
audio/x-realaudio ra;

video/3gpp 3gpp 3gp;
video/mp2t ts;
video/mp4 mp4;
video/mpeg mpeg mpg;
video/quicktime mov;
video/webm webm;
video/x-flv flv;
video/x-m4v m4v;
video/x-mng mng;
video/x-ms-asf asx asf;
video/x-ms-wmv wmv;
video/x-msvideo avi;
}

# configuration file /etc/nginx/conf.d/development.conf:
server {

# static medias web server configuration, for development
# and testing purposes.

listen 80;
server_name localhost;
error_log /var/log/nginx/error_log; #debug
#access_log /var/log/nginx/gthc.org/access.log;
root /home/erob/www/isotopesoftware.ca;
#autoindex on;

location / {
# # host and port to fastcgi server
fastcgi_pass 127.0.0.1:8808; # 8808=gthc.org; 8801=tm
include fastcgi_params;
autoindex on;
# # rewrite /CamelCase to /wiki/CamelCase
# rewrite ^/(.*[A-Z][a-z]*)$ /wiki$1 last;
etag on;
#fastcgi_pass_header $http_if_none_match;
}


# debug url rewriting to the error log
rewrite_log on;

location /media {
autoindex on;
gzip on;
}

location /pub {
autoindex on;
gzip on;
}

location /webalizer {
autoindex on;
gzip on;
#auth_basic "Private Property";
#auth_basic_user_file /etc/nginx/.htpasswd;
allow 67.68.76.70;
deny all;
}

location /documentation {
autoindex on;
gzip on;
}

location /moin_static184 {
autoindex on;
gzip on;
}

location /favicon.ico {
empty_gif;
}
location /robots.txt {
root /home/www/isotopesoftware.ca;
}
location /sitemap.xml {
root /home/www/isotopesoftware.ca;
}

#location /public_html {
# root /home/www/;
# autoindex on;
#}
# redirect server error pages to the static page /50x.html
#error_page 404 /404.html;
#error_page 403 /403.html;
#error_page 500 502 503 504 /50x.html;
#location = /50x.html {
# root /var/www/nginx-default;
#}

include conf.d/moinmoin.conf;
#include conf.d/hgwebdir.conf;
}


# configuration file /etc/nginx/fastcgi_params:
fastcgi_param PATH_INFO $fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;

fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;

fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
#fastcgi_param REMOTE_USER $remote_user;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;


fastcgi_param HTTP_IF_NONE_MATCH $http_if_none_match;
fastcgi_param HTTP_IF_MODIFIED_SINCE $http_if_modified_since;


# PHP only, required if PHP was built with --enable-force-cgi-redirect
# fastcgi_param REDIRECT_STATUS 200;

fastcgi_send_timeout 90;
fastcgi_read_timeout 90;
fastcgi_connect_timeout 40;
fastcgi_cache_valid 200 304 10m;
#fastcgi_buffer_size 128k;
#fastcgi_buffers 8 128k;
#fastcgi_busy_buffers_size 256k;
#fastcgi_temp_file_write_size 256k;


# configuration file /etc/nginx/conf.d/moinmoin.conf:


location /wiki {


if ($uri ~ ^/wiki(.*)?){
set $wiki_url $1;
}
# host and port to fastcgi server
fastcgi_pass 127.0.0.1:8807; # 8808=gthc.org; 8801=tm; 8807=moinmoin
#include fastcgi_params;
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
#fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
fastcgi_param PATH_INFO $wiki_url;
fastcgi_param SCRIPT_NAME /wiki;
}
#location /moin_static184 {
# root /home/www/isotopesoftware.ca;
# autoindex on;
#}

Configuration:
sudo nginx -V
nginx version: nginx/1.12.0
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.2l 25 May 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 --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_gzip_static_module --with-http_image_filter_module
--with-http_sub_module --with-threads


Questions:

1. Any suggestions why the value of HTTP_IF_NONE_MATCH is not defined in
nginx ?
2. Why is the python script working with wsgiref but not in nginx ?

Thank you in advance,

Etienne
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