docs: Update README

README.md

@@ -1,56 +1,41 @@
 # update-plex-ipv6-access-url
-DynDNS-like script for keeping your Plex IPv6 custom access URL up to date, automating the IPv6 workaround for Plex as described on [Reddit](https://www.reddit.com/r/PleX/comments/b82opu/plex_remote_access_over_ipv6/).
 
-## Features
-- determine IPv6 address for a specified interface
-- update Plex config with plex.direct-domain using current IPv6 address
-- restart Plex service
-
-## Prerequisite
-You need to initially add a custom server access URL manually, which the script will then keep up to date. Here's how you can easily find everything you need:
-
-1. Navigate to any media item in your library as the admin user
-2. Click `...` (More) next to the edit pen to see more options
-3. Click "Get Info" at the very bottom of the list
-4. At the bottom right of the "Media info" dialogue, click "View XML"
-5. Take note of the domain in the new tab, you should something like `https://[some-ip-address].[server-id].plex.direct:32400/`
-6. Determine your server's current IPv6 address (either directly from the server or via your router)
-7. Expand the IPv6 address to it's uncompressed/full state (using a tool like [this one](https://dnschecker.org/ipv6-expand.php), which turns a shortened IPv6 such as `2606:4700::6810:84e5` into `2606:4700:0000:0000:0000:0000:6810:84e5`)
-8. Replace all colons in the expanded IPv6 address with dashes
-9. Put everything together as `https://["dashed"-ipv6-address].[serverid].plex.direct:32400/` the "dashed" IPv6
-10. Add the url as a "Custom server access URL" in your Plex server settings unter "Network"
-
-If you are unsure where to find the "Media info" dialogue in order to get your server id, follow [this Plex support article](https://support.plex.tv/articles/201998867-investigate-media-information-and-formats/).
-
-__Example__:
-
-IPv6 address reported by server: `2606:4700::6810:84e5`
+DynDNS-like tool for keeping your Plex IPv6 custom access URL up to date, automating the IPv6 workaround for Plex as described on [Reddit](https://www.reddit.com/r/PleX/comments/b82opu/plex_remote_access_over_ipv6/).
 
-Expanded IPv6 address: `2606:4700:0000:0000:0000:0000:6810:84e5`
-
-Custom server access URL to add: `https://2606-4700-0000-0000-0000-0000-6810-84e5.055e11e51095c8b4f16c572691ff8113.plex.direct:32400/`
+## Features
 
-## Setup
-In order to use the script, you just need to download it. However, if you want it to automatically restart the Plex service in case the IPv6 address changed, you need to either comment out or add a command to restart the service (depending on your host OS).
+- determine IPv6 address for a specified interface
+- update Plex settings with plex.direct-domain using current IPv6 address
 
 ## Command line arguments
-The script requires two positional arguments:
 
-Position|Description|Required
---------|-----------|--------
-1       |Name of network interface to use for IPv6 access|Yes
-2       |Path to Plex config (`Preferences.xml`)|Yes
+If any required command line argument is omitted, the tool will prompt you to provide input at runtime.
 
-If you are unsure where to find your Plex data directory (which contains the `Preferences.xml`), please refer to [this Plex support article](https://support.plex.tv/articles/202915258-where-is-the-plex-media-server-data-directory-located/).
+| Name      | Description                                                                                                                                            | Required               |
+|-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------|
+| address   | Plex server's address in format http\[s\]://host:port                                                                                                  | Yes                    |
+| interface | Name of network interface to use for IPv6 access                                                                                                       | Yes                    |
+| token     | Plex access token (X-Plex-Token) [How to find](https://support.plex.tv/articles/204059436-finding-an-authentication-token-x-plex-token/)               | If config is not given |
+ | config    | Path to Plex config (Preferences.xml) [How to find](https://support.plex.tv/articles/202915258-where-is-the-plex-media-server-data-directory-located/) | No                     |
 
 ## Usage
 
 A simple example: You are running Plex on an Ubuntu server and set Plex up to listen on the `ens18` interface. Your Plex library resides in the default location, which is `/var/lib/plexmediaserver/Library/Application Support/Plex Media Server`. Assuming you are currently in the directory you placed the script in, you would run the script like so:
-
 ```bash
-./update-plex-ipv6-access-url.sh ens18 "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Preferences.xml"
+./update-plex-ipv6-access-url -address http://localhost:32400 -interface ens18 -config "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Preferences.xml"
 ```
 
-**Please note:** You need to either quote the path to the config or escape the contained spaces.
+Plex does not store the config on disk on all platforms. On those platforms, you need to manually specify an access token, as it cannot be read from Preferences.xml.
+```powershell
+.\update-plex-ipv6-access-url.exe -address http://localhost:32400 -interface Ethernet -token your-X-Plex-Token
+```
+
+To automate the process, create a cronjob or other type of scheduled task in order to run the script regularly.
 
-In order to automate the process, create a cronjob or other type of scheduled task in order to run the script regularly. Just keep in mind that your Plex server will be unavailable for a few seconds when the script restarts the Plex service after an IPv6 address change, so choose times to run the script accordingly.
+For testing or one-time use, you can also run the tool without any command line arguments and provide required input at runtime.
+```commandline
+$ ./update-plex-ipv6-access-url
+Enter the Plex server's address in format 'http[s]://host:port': http://localhost:32400
+Enter the name of network interface to use for IPv6 access: eth0
+Enter a Plex access token (X-Plex-Token): your-X-Plex-Token
+```