fix: ensures req.origin includes port on localhost (#11454)

The `req.origin` property on the `PayloadRequest` object does not
include the port when running on localhost, a requirement of the [HTML
Living Standard](https://html.spec.whatwg.org/#origin). This was because
we were initializing the url with a fallback of `http://localhost` (no
port). When constructed via `new URL()`, the port is unable to be
extracted. This is fixed by using the `host` property off the headers
object, if it exists, which includes the port.

Partial fix for #11448.

packages/payload/src/utilities/createLocalReq.ts

@@ -26,22 +26,26 @@ function getRequestContext(
 const attachFakeURLProperties = (req: Partial<PayloadRequest>) => {
   /**
    * *NOTE*
-   * If no URL is provided, the local API was called directly outside
+   * If no URL is provided, the local API was called outside
    * the context of a request. Therefore we create a fake URL object.
-   * `ts-expect-error` is used below for properties that are 'read-only'
-   * since they do not exist yet we can safely ignore the error.
+   * `ts-expect-error` is used below for properties that are 'read-only'.
+   * Since they do not exist yet we can safely ignore the error.
    */
-  let urlObject
+  let urlObject: undefined | URL
 
   function getURLObject() {
     if (urlObject) {
       return urlObject
     }
-    const urlToUse = req?.url || req.payload.config?.serverURL || 'http://localhost'
+
+    const fallbackURL = `http://${req.host || 'localhost'}`
+
+    const urlToUse = req?.url || req.payload.config?.serverURL || fallbackURL
+
     try {
       urlObject = new URL(urlToUse)
-    } catch (error) {
-      urlObject = new URL('http://localhost')
+    } catch (_err) {
+      urlObject = new URL(fallbackURL)
     }
 
     return urlObject
@@ -50,20 +54,25 @@ const attachFakeURLProperties = (req: Partial<PayloadRequest>) => {
   if (!req.host) {
     req.host = getURLObject().host
   }
+
   if (!req.protocol) {
     req.protocol = getURLObject().protocol
   }
+
   if (!req.pathname) {
     req.pathname = getURLObject().pathname
   }
+
   if (!req.searchParams) {
     // @ts-expect-error eslint-disable-next-line no-param-reassign
     req.searchParams = getURLObject().searchParams
   }
+
   if (!req.origin) {
     // @ts-expect-error eslint-disable-next-line no-param-reassign
     req.origin = getURLObject().origin
   }
+
   if (!req?.url) {
     // @ts-expect-error eslint-disable-next-line no-param-reassign
     req.url = getURLObject().href

tsconfig.base.json

@@ -31,7 +31,7 @@
       }
     ],
     "paths": {
-      "@payload-config": ["./test/admin/config.ts"],
+      "@payload-config": ["./test/_community/config.ts"],
       "@payloadcms/live-preview": ["./packages/live-preview/src"],
       "@payloadcms/live-preview-react": ["./packages/live-preview-react/src/index.ts"],
       "@payloadcms/live-preview-vue": ["./packages/live-preview-vue/src/index.ts"],