How to do case insensitive regex on an Nginx server? -


a serious problem happened after migrating server ubuntu debian. debian won't allow 2 files, example "a.html" , "a.html" in same directory.

my server gets 3 types of requests , current status:

requests such /archive/2014/www.test.com supplied file: /archive/2014/blank.html

requests such /archive/2015/test.com , /archive/2015/www.test.com supplied file /archive/2015/t.html

requests such /archive/2015/test.com , /archive/2015/www.test.com supplied file /archive/2015/t.html

i want last 2 types of requests supply file /archive/2015/t.html in both cases (in case insensitive way).

how achieve outcome?

the current server settings are:

server {     listen   127.0.0.1:80;     server_name 127.0.0.1;      access_log /srv/siteone/logs/access.log;     error_log /srv/siteone/logs/error.log error;      location / {         root   /srv/siteone/html;         index  index.html index.htm;         expires 1d;     }      rewrite ^/archive/2014/(.+)$ /archive/2014/blank.html last;     rewrite ^/archive/2015/(www\.)*(.)(.+)$ /archive/2015/$2.html last;       error_page  403  /403.html;     error_page  404  /404.html;  }

there plenty of ways can go problem.

  1. since need change 1 specific letter lowercase, use "map" case insensitive regular expression:

    map $request $letter {     "~*^/archive/[0-9]{4}/(www\.)?a(.*)?$"  a;     "~*^/archive/[0-9]{4}/(www\.)?b(.*)?$"  b;     "~*^/archive/[0-9]{4}/(www\.)?c(.*)?$"  c;     "~*^/archive/[0-9]{4}/(www\.)?d(.*)?$"  d;     "~*^/archive/[0-9]{4}/(www\.)?e(.*)?$"  e;     "~*^/archive/[0-9]{4}/(www\.)?f(.*)?$"  f;     "~*^/archive/[0-9]{4}/(www\.)?g(.*)?$"  g;     "~*^/archive/[0-9]{4}/(www\.)?h(.*)?$"  h;     "~*^/archive/[0-9]{4}/(www\.)?i(.*)?$"  i;     "~*^/archive/[0-9]{4}/(www\.)?j(.*)?$"  j;     "~*^/archive/[0-9]{4}/(www\.)?k(.*)?$"  k;     "~*^/archive/[0-9]{4}/(www\.)?l(.*)?$"  l;     "~*^/archive/[0-9]{4}/(www\.)?m(.*)?$"  m;     "~*^/archive/[0-9]{4}/(www\.)?n(.*)?$"  n;     "~*^/archive/[0-9]{4}/(www\.)?o(.*)?$"  o;     "~*^/archive/[0-9]{4}/(www\.)?p(.*)?$"  p;     "~*^/archive/[0-9]{4}/(www\.)?q(.*)?$"  q;     "~*^/archive/[0-9]{4}/(www\.)?r(.*)?$"  r;     "~*^/archive/[0-9]{4}/(www\.)?s(.*)?$"  s;     "~*^/archive/[0-9]{4}/(www\.)?t(.*)?$"  t;     "~*^/archive/[0-9]{4}/(www\.)?u(.*)?$"  u;     "~*^/archive/[0-9]{4}/(www\.)?v(.*)?$"  v;     "~*^/archive/[0-9]{4}/(www\.)?w(.*)?$"  w;     "~*^/archive/[0-9]{4}/(www\.)?x(.*)?$"  x;     "~*^/archive/[0-9]{4}/(www\.)?y(.*)?$"  y;     "~*^/archive/[0-9]{4}/(www\.)?z(.*)?$"  z; }  server {     listen   127.0.0.1:80;     server_name 127.0.0.1;      access_log /srv/siteone/logs/access.log;     error_log /srv/siteone/logs/error.log error;      root   /srv/siteone/html;      location / {         index  index.html index.htm;         expires 1d;     }      rewrite ^/archive/2014/(.+)$ /archive/2014/blank.html last;     rewrite ^/archive/2015/(www\.)?(.)(.+)$ /archive/2015/$letter.html last;       error_page  403  /403.html;     error_page  404  /404.html; }

  2. if have embedded perl module installed (sudo apt-get install nginx-extras), use perl request line lowercase:

    perl_set $uri_lowercase 'sub {     $r = shift;     return lc($r->uri); }';  server {     listen   127.0.0.1:80;     server_name 127.0.0.1;      access_log /srv/siteone/logs/access.log;     error_log /srv/siteone/logs/error.log error;      root   /srv/siteone/html;      location / {         index  index.html index.htm;         expires 1d;     }      rewrite ^/archive/2014/(.+)$ /archive/2014/blank.html last;     rewrite ^/archive/2015/(www\.)?(.)(.+)$ $uri_lowercase;     rewrite ^/archive/2015/(www\.)?(.)(.+)$ /archive/2015/$2.html last;      error_page  403  /403.html;     error_page  404  /404.html; }

  3. if prefer lua before perl, same lua (again, need nginx-extras installed):

    server {     listen   127.0.0.1:80;     server_name 127.0.0.1;      access_log /srv/siteone/logs/access.log;     error_log /srv/siteone/logs/error.log error;      root   /srv/siteone/html;      location / {         index  index.html index.htm;         expires 1d;     }      rewrite ^/archive/2014/(.+)$ /archive/2014/blank.html last;     rewrite_by_lua 'ngx.req.set_uri(string.lower(ngx.var.uri), false)';     rewrite ^/archive/2015/(www\.)?(.)(.+)$ /archive/2015/$2.html last;      error_page  403  /403.html;     error_page  404  /404.html; }

  4. if don't of above, there dark nginx trickery (but don't recommend it):

    server {     listen   127.0.0.1:8484;      access_log off;      rewrite ^.*$ /archive/2015/$host.html;      root /srv/siteone/html;      location / {         index  index.html index.htm;         expires 1d;     } }  server {     listen   127.0.0.1:80;     server_name 127.0.0.1;      access_log /srv/siteone/logs/access.log;     error_log /srv/siteone/logs/error.log error;      root   /srv/siteone/html;      location / {         index  index.html index.htm;         expires 1d;     }      location ~* ^/archive/2015/(?<letter>[a-z])\.html$ {         proxy_set_header host $letter;         proxy_pass http://127.0.0.1:8484;     }      rewrite ^/archive/2014/(.+)$ /archive/2014/blank.html last;     rewrite ^/archive/2015/(www\.)?(.)(.+)$ /archive/2015/$2.html last;      error_page  403  /403.html;     error_page  404  /404.html; }

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