Better exception for bad URL parse (#2415)

sanic/exceptions.py

@@ -51,6 +51,10 @@ class InvalidUsage(SanicException):
     quiet = True
 
 
+class BadURL(InvalidUsage):
+    ...
+
+
 class MethodNotSupported(SanicException):
     """
     **Status**: 405 Method Not Allowed

sanic/request.py

@@ -30,10 +30,11 @@ from types import SimpleNamespace
 from urllib.parse import parse_qs, parse_qsl, unquote, urlunparse
 
 from httptools import parse_url  # type: ignore
+from httptools.parser.errors import HttpParserInvalidURLError  # type: ignore
 
 from sanic.compat import CancelledErrors, Header
 from sanic.constants import DEFAULT_HTTP_CONTENT_TYPE
-from sanic.exceptions import InvalidUsage, ServerError
+from sanic.exceptions import BadURL, InvalidUsage, ServerError
 from sanic.headers import (
     AcceptContainer,
     Options,
@@ -129,8 +130,10 @@ class Request:
     ):
 
         self.raw_url = url_bytes
-        # TODO: Content-Encoding detection
+        try:
             self._parsed_url = parse_url(url_bytes)
+        except HttpParserInvalidURLError:
+            raise BadURL(f"Bad URL: {url_bytes.decode()}")
         self._id: Optional[Union[uuid.UUID, str, int]] = None
         self._name: Optional[str] = None
         self.app = app

tests/test_request.py

@@ -4,6 +4,7 @@ from uuid import UUID, uuid4
 import pytest
 
 from sanic import Sanic, response
+from sanic.exceptions import BadURL
 from sanic.request import Request, uuid
 from sanic.server import HttpProtocol
 
@@ -176,3 +177,17 @@ def test_request_accept():
         "text/x-dvi; q=0.8",
         "text/plain; q=0.5",
     ]
+
+
+def test_bad_url_parse():
+    message = "Bad URL: my.redacted-domain.com:443"
+    with pytest.raises(BadURL, match=message):
+        Request(
+            b"my.redacted-domain.com:443",
+            Mock(),
+            Mock(),
+            Mock(),
+            Mock(),
+            Mock(),
+            Mock(),
+        )