Nginx reverse proxy with different context path

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I\'m trying to use nginx to reverse proxy multiple web applications on the same host / port, using a different path to distinguish between applications.

My nginx con

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余生分开走

2021-01-15 17:33
Well first of all there is nothing like transparently proxying a backend from a root domain to a domain with a added base url.

If you want to proxy http://xyz/abc to http://def then there is no way to have a 100% guarantee to have everything work. You need application specific changes

If you backend API is something which doesn't return url accessing current url then you don't need to worry about the proxy_pass. But if you have a html then you need to fix everything that comes your way.

See a simple config I created for deluge backend

How to proxy calls to specific URL to deluge using NGINX?

As you can all the sub_filter were done to fix urls in CSS, JavaScript and HTML. And I had to run it, find issues and then implement fixes. Below is the config for your reference
```
location ~* /deluge/(.*) {
    sub_filter_once off;
    sub_filter_types text/css;
    sub_filter '"base": "/"' '"base": "/deluge/"';
    sub_filter '<head>' '<head>\n<base href="/deluge/">';
    sub_filter 'src="/' 'src="./';
    sub_filter 'href="/' 'href="./';
    sub_filter 'url("/' 'url("./';
    sub_filter 'url(\'/' 'url(\'./';

    set $deluge_host 192.168.33.100;
    set $deluge_port 32770;
    proxy_pass http://$deluge_host:$deluge_port/$1;
    proxy_cookie_domain $deluge_host $host;
    proxy_cookie_path / /deluge/;
    proxy_redirect  http://$deluge_host:$deluge_port/ /deluge/;
}
```
You can customize the above based on your app. But below is what you would need
```
location /app1/ {
    sub_filter_once off;
    sub_filter '<head>' '<head>\n<base href="/app1/">';
    sub_filter 'src="/' 'src="./';
    sub_filter 'href="/' 'href="./';
}
```
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