Add comment about prepending localhost

Author: hansott

library/helpers/matchEndpoint.ts

@@ -29,6 +29,8 @@ export function matchEndpoint(context: LimitedContext, endpoints: Endpoint[]) {
     return undefined;
   }
 
+  // req.url is relative, so we need to prepend a host to make it absolute
+  // We just match the pathname, we don't use the host for matching
   const url = tryParseURL(
     context.url.startsWith("/") ? `http://localhost${context.url}` : context.url
   );

library/sources/http-server/contextFromRequest.ts

@@ -12,6 +12,8 @@ export function contextFromRequest(
   let parsedURL: URL | undefined = undefined;
   if (req.url) {
     try {
+      // req.url is relative, so we need to prepend a host to make it absolute
+      // We just need the searchParams, we don't use the host
       parsedURL = new URL(
         req.url.startsWith("/") ? `http://localhost${req.url}` : req.url
       );