Fix: accept wider range of protocols

Author: nvie

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## [Unreleased]
 
+- Fix: `url` decoder now also accepts a wider range of protocol lengths, now accepting
+  e.g. at:// and postgresql:// URLs
+
 ## [2.7.1] - 2025-08-01
 
 - Fix: `dateString` decoder is now properly exported at the top-level

src/strings.ts

@@ -15,7 +15,7 @@ import { either } from './unions';
  * \5 - the path (optional)
  */
 const url_re =
-  /^([A-Za-z]{3,9}(?:[+][A-Za-z]{3,9})?):\/\/(?:([-;:&=+$,\w]+)@)?(?:([A-Za-z0-9.-]+)(?::([0-9]{2,5}))?)(\/(?:[-+~%/.,\w]*)?(?:\?[-+=&;%@.,/\w]*)?(?:#[.,!/\w]*)?)?$/;
+  /^([A-Za-z]{2,12}(?:[+][A-Za-z]{2,12})?):\/\/(?:([-;:&=+$,\w]+)@)?(?:([A-Za-z0-9.-]+)(?::([0-9]{2,5}))?)(\/(?:[-+~%/.,\w]*)?(?:\?[-+=&;%@.,/\w]*)?(?:#[.,!/\w]*)?)?$/;
 
 /**
  * Accepts and returns strings.

test/strings.test.ts

@@ -130,9 +130,6 @@ describe('url', () => {
   const decoder = url;
 
   test('valid', () => {
-    expect(decoder.verify(new URL('https://nvie.com/')).toString()).toEqual(
-      'https://nvie.com/',
-    );
     expect(decoder.verify('https://nvie.com').toString()).toEqual('https://nvie.com/');
     expect(decoder.verify('https://example.com/foo?q=foo/bar').toString()).toBe(
       'https://example.com/foo?q=foo/bar',
@@ -143,6 +140,10 @@ describe('url', () => {
     expect(decoder.verify('https://res.example.com/a_b,c_1d/foo.svg').toString()).toBe(
       'https://res.example.com/a_b,c_1d/foo.svg',
     );
+    expect(decoder.verify('postgresql://localhost/db').toString()).toEqual(
+      'postgresql://localhost/db',
+    );
+    expect(decoder.verify('at://localhost/db').toString()).toEqual('at://localhost/db');
   });
 
   test('custom URL schemes', () => {