#14072: Fix parsing of tel URIs in urlparse by making the check for ports stricter.

Lib/test/test_urlparse.py

@@ -806,6 +806,13 @@ class UrlParseTestCase(unittest.TestCase):
                           encoding='utf-8')
         self.assertRaises(TypeError, urllib.parse.quote, b'foo', errors='strict')
 
+    def test_issue14072(self):
+        p1 = urllib.parse.urlsplit('tel:+31-641044153')
+        self.assertEqual(p1.scheme, 'tel')
+        self.assertEqual(p1.path, '+31-641044153')
+        p2 = urllib.parse.urlsplit('tel:+31641044153')
+        self.assertEqual(p2.scheme, 'tel')
+        self.assertEqual(p2.path, '+31641044153')
 
 def test_main():
     support.run_unittest(UrlParseTestCase)

Lib/urllib/parse.py

@@ -338,12 +338,12 @@ def urlsplit(url, scheme='', allow_fragments=True):
             if c not in scheme_chars:
                 break
         else:
-            try:
-                # make sure "url" is not actually a port number (in which case
-                # "scheme" is really part of the path
-                _testportnum = int(url[i+1:])
-            except ValueError:
-                scheme, url = url[:i].lower(), url[i+1:]
+            # make sure "url" is not actually a port number (in which case
+            # "scheme" is really part of the path)
+            rest = url[i+1:]
+            if not rest or any(c not in '0123456789' for c in rest):
+                # not a port number
+                scheme, url = url[:i].lower(), rest
 
     if url[:2] == '//':
         netloc, url = _splitnetloc(url, 2)

Misc/NEWS

@@ -66,6 +66,9 @@ Library
 - Issue #14721: Send the correct 'Content-length: 0' header when the body is an
   empty string ''. Initial Patch contributed by Arve Knudsen.
 
+- Issue #14072: Fix parsing of 'tel' URIs in urlparse by making the check for
+  ports stricter.
+
 - Issue #9374: Generic parsing of query and fragment portions of url for any
   scheme. Supported both by RFC3986 and RFC2396.