[Bug]: Full domain URLs in images.path config bypass Edge functions

[zachleat]

Summary

With a next.config.js file like this:

module.exports = {
  images: {
    path: `https://example.com/_next/image`,
  },
}

The Netlify edge function manifest.json outputs:

{
	"functions": [
		{
			"function": "ipx",
			"name": "next/image handler",
			"path": "https://example.com/_next/image",
			"generator": "@netlify/next-runtime@4.36.1"
		}
	],
	"layers": [
		{
			"name": "https://ipx-edge-function-layer.netlify.app/mod.ts",
			"flag": "ipx-edge-function-layer-url"
		}
	],
	"version": 1
}

The problem here is that domains in path are not supported for Edge functions, similar to what you might expect in domain-level redirects.

Steps to reproduce

1. Navigate to https://melodious-rugelach-38894a.netlify.app/
2. Each of the first 4 links should render as Hello world Edge text
3. Changing config.path in netlify/edge-functions/ipx.js to /_next/image fixes the issue.

A link to a reproduction repository

https://github.com/zachleat/edge-redirects-test

Next Runtime version

4.36.1

Is your issue related to the app directory (beta)?

• Yes, I am using the app directory

More information about your build

• I am building using the CLI
• I am building using file-based configuration (netlify.toml)

What OS are you using?

None

Your netlify.toml file

`netlify.toml`

# Paste content of your `netlify.toml` file here

Your public/_redirects file

`_redirects`

# Paste content of your `_redirects` file here

Your next.config.js file

`next.config.js`

# Paste content of your `next.config.js` file here. Check there is no private info in there.

Builds logs (or link to your logs)

Build logs

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Function logs

Function logs

# Paste logs here

.next JSON files

generated .next JSON files

# Paste file contents here. Please check there isn't any private info in them
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