Tweak the internal handling of the url-parameter in getDocument (PR 13166 follow-up)

- Use a `URL`-instance directly, since it's by definition an absolute URL.
 - Actually limit the "raw" url-string handling to Node.js environments, as intended.
 - Skip the warning, since we're already throwing an Error if the `url`-parameter is invalid.

src/display/api.js

@@ -289,17 +289,23 @@ function getDocument(src) {
 
     switch (key) {
       case "url":
-        if (typeof window !== "undefined") {
+        if (val instanceof URL) {
+          params[key] = val.href;
+          continue;
+        }
         try {
           // The full path is required in the 'url' field.
           params[key] = new URL(val, window.location).href;
           continue;
         } catch (ex) {
-            warn(`Cannot create valid URL: "${ex}".`);
+          if (
+            typeof PDFJSDev !== "undefined" &&
+            PDFJSDev.test("GENERIC") &&
+            isNodeJS &&
+            typeof val === "string"
+          ) {
+            break; // Use the url as-is in Node.js environments.
           }
-        } else if (typeof val === "string" || val instanceof URL) {
-          params[key] = val.toString(); // Support Node.js environments.
-          continue;
         }
         throw new Error(
           "Invalid PDF url data: " +