Possibility to add CORS domains permanently

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1

Hello,

I am using PiHole API with another service. To use it I need to access the API with a specific URL, where PiHole returns me that there are problems with CORS. [I have no idea what Cors is or how it works].

However, if I add the domain I want to access the API from here, everything works fine:
var/www/html/pihole/scripts/pihole/php/auth.php

...
function check_cors()
{
    $ip = $_SERVER['SERVER_ADDR'];

    // Check CORS
    $AUTHORIZED_HOSTNAMES = array(
        $ip,
        str_replace(array('[', ']'), array('', ''), $_SERVER['SERVER_NAME']),
        'pi.hole',
        'localhost',
        'HERE MY DOMAIN',
    );
...

Unfortunately this resets after every update. Could you make it possible to enter a domain there permanently, so that I don't have to re-enter it after each update?

2

If you'd read that code further, you should see that you could populate CORS_HOSTS (and also VIRTUAL_HOST, potentially) environment variables for that purpose.

3

Okay, but I don't get it. How exactly can I add domains there?

4

There are several ways to achieve this, e.g. via a custom lighttpd configuration as mentioned in Cannot access api.php Json from localhost or different server, or simply setting CORS_HOSTS for a Pi-hole Docker container.

5

I think you mean this?

image
image715×315 13.3 KB

You don't know how I can do this in Apache2, do you? I do not use lighttpd but Apache2

6

Sorry, I don't.

7

I'm not very well versed in Apache configurations, but I think you need to set an Environment Variable using SetEnv.

8

I did it, unfortunately I still need to put the domain in the auth.php file.

9

I'm unable to test right now, but I think if you set the variable using something like this:

<VirtualHost hostname:80>
   ...
   SetEnv CORS_HOSTS desired.domain.name
   ...
</VirtualHost>

The PHP code should read the value (line 56) and insert it into $AUTHORIZED_HOSTNAMES variable (line 58):

NOTE:
You need to restart apache2 after edit your config.

10

It works! Thank you very much!

11

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