Home / server / Questions / 711383
In Process
grucha
Asked: 2015-08-07 09:32:45 +0800 CST

How to configure nginx to force download on a query param

  • 772

So that /media/file.jpg opens in browser and /media/file.jpg?dl=1 forces browser to download.

Here's my current config, that doesn't work:

location /media/ {
    autoindex off;
    root /home/my_app/media/;

    location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
        expires 365d;
        add_header Pragma public;
        add_header Cache-Control "public";
    }

    # Allow forcing download by query param `dl`
    if ($arg_dl = "1") {  # why this doesn't work?
        add_header Content-disposition "attachment; filename=$1";
    }
}
nginx

1 Answers

  1. The if statement is never reached, because only the location is matched when a file is requested.

    If the URL /media/ is in /home/my_app/media/ directory, you cannot use root like that. You need to either use alias /home/my_app/media/ or root /home/my_app/.

    You should try this (updated version):

    location ~* ^/media/.+\.(?:ico|css|js|gif|jpe?g|png)$ {
    autoindex off;
    root /home/my_app/media/;

    expires 365d;
    add_header Pragma public;
    add_header Cache-Control "public";

    if ($arg_dl = "1") {
        add_header Content-disposition "attachment; filename=$1";
    }
}
    • 1