Fix relative IRI parsing.

- Undo previous "protocol" fix for `123:abc` style relative IRIs.
- Update IRI parser to be more strict for RFC3986 URI schemes.

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Fix safe mode for `@graph` use cases.
   - Check all elements of graph property with array.
 - Fix test `pr41` of protected redefinition of equivalent id terms.
+- Fix relative IRI parsing.
 
 ## 8.2.0 - 2023-05-19
 

lib/url.js

@@ -28,7 +28,7 @@ api.parsers = {
       'hostname', 'port', 'path', 'directory', 'file', 'query', 'fragment'
     ],
     /* eslint-disable-next-line max-len */
-    regex: /^(([^:\/?#]+):)?(?:\/\/((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?))?(?:(((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/
+    regex: /^(([a-zA-Z][a-zA-Z0-9+-.]*):)?(?:\/\/((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?))?(?:(((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/
   }
 };
 api.parse = (str, parser) => {
@@ -109,8 +109,6 @@ api.prependBase = (base, iri) => {
         path = path.substr(0, path.lastIndexOf('/') + 1);
         if((path.length > 0 || base.authority) && path.substr(-1) !== '/') {
           path += '/';
-        } else if (rel.protocol) {
-          path += rel.protocol;
         }
         path += rel.path;
 

tests/misc.js

@@ -1491,7 +1491,6 @@ _:b0 <ex:p> "v" .
         testSafe: true
       });
     });
-
   });
 
   describe('values', () => {