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document CORS_ALLOWED_ORIGINS variable

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Alex Shnitman
2026-04-10 08:09:20 +03:00
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README.md
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@@ -82,6 +82,7 @@ Certain values can be set via environment variables, using the `-e` parameter on
* __HTTPS__: Use `https` instead of `http` (__CERTFILE__ and __KEYFILE__ required). Defaults to `false`.
* __CERTFILE__: HTTPS certificate file path.
* __KEYFILE__: HTTPS key file path.
* __CORS_ALLOWED_ORIGINS__: Comma-separated list of origins permitted to make cross-origin requests to the MeTube API. When unset or empty, all cross-origin requests are denied. This must be configured for [bookmarklets](#-bookmarklet) and any other browser-based tools that contact MeTube from a different origin. Example: `https://www.youtube.com,https://www.vimeo.com`.
* __ROBOTS_TXT__: A path to a `robots.txt` file mounted in the container.
### 🏠 Basic Setup
@@ -239,6 +240,8 @@ __Firefox:__ contributed by [nanocortex](https://github.com/nanocortex). You can
[kushfest](https://github.com/kushfest) has created a Chrome bookmarklet for sending the currently open webpage to MeTube. Please note that if you're on an HTTPS page, your MeTube instance must be configured with `HTTPS` as `true` in the environment, or be behind an HTTPS reverse proxy (see below) for the bookmarklet to work.
Since bookmarklets run in the context of the current page (e.g. youtube.com), the requests they make to MeTube are cross-origin. You must add the origins of sites where you use the bookmarklet to the __CORS_ALLOWED_ORIGINS__ environment variable, otherwise the browser will block the requests. For example, to use the bookmarklet on YouTube and Vimeo: `CORS_ALLOWED_ORIGINS=https://www.youtube.com,https://www.vimeo.com`.
GitHub doesn't allow embedding JavaScript as a link, so the bookmarklet has to be created manually by copying the following code to a new bookmark you create on your bookmarks bar. Change the hostname in the URL below to point to your MeTube instance.
```javascript