nginx - response based on the requested header

nginx server-configuration

Doua Beri · Feb 6, 2012 · Viewed 15.6k times · Source

I have nginx 1.0.8 installed. here is my problem: I have 2 files : file1.js and file2.js. the requested path is something like this:

www.mysite.com/files_dir/%user%/file.js

If the requested header : "X-Header" exists and has the value "OK" then the responded content should be file1.js else file2.js.

The files are situated in "html/files_dir" and %user% is a set of directories that represents the usernames registered through my service.

How do I configure this in nginx? I'm not interested in php, asp or similar technologies only if it's possible with nginx.

Thanks

Answer

map lets you define a variable's value based on another variable. map should be declared at http level (i.e. outside of server):

map $http_x_header $file_suffix {
  default "2";
  OK      "1";
};

Then the following location should do the trick using your new variable $file_suffix

location ~ ^(/files_dir/.+)\.js$ {
  root html;
  try_files $1$file_suffix.js =404;
}