cleanups and mypy 1.1.1 fixes (#5977)

mitmproxy/certs.py

@@ -6,6 +6,7 @@ import re
 import sys
 from dataclasses import dataclass
 from pathlib import Path
+from typing import cast
 from typing import NewType
 from typing import Optional
 from typing import Union
@@ -134,7 +135,7 @@ class Cert(serializable.Serializable):
     def cn(self) -> str | None:
         attrs = self._cert.subject.get_attributes_for_oid(x509.NameOID.COMMON_NAME)
         if attrs:
-            return attrs[0].value
+            return cast(str, attrs[0].value)
         return None
 
     @property
@@ -143,7 +144,7 @@ class Cert(serializable.Serializable):
             x509.NameOID.ORGANIZATION_NAME
         )
         if attrs:
-            return attrs[0].value
+            return cast(str, attrs[0].value)
         return None
 
     @property
@@ -166,12 +167,8 @@ class Cert(serializable.Serializable):
 def _name_to_keyval(name: x509.Name) -> list[tuple[str, str]]:
     parts = []
     for attr in name:
-        # pyca cryptography <35.0.0 backwards compatiblity
-        if hasattr(name, "rfc4514_attribute_name"):  # pragma: no cover
-            k = attr.rfc4514_attribute_name  # type: ignore
-        else:  # pragma: no cover
-            k = attr.rfc4514_string().partition("=")[0]
-        v = attr.value
+        k = attr.rfc4514_string().partition("=")[0]
+        v = cast(str, attr.value)
         parts.append((k, v))
     return parts
 

mitmproxy/coretypes/serializable.py

@@ -69,7 +69,7 @@ class SerializableDataclass(Serializable):
         hints = typing.get_type_hints(cls)
         fields = []
         # noinspection PyDataclass
-        for field in dataclasses.fields(cls):
+        for field in dataclasses.fields(cls):  # type: ignore[arg-type]
             if field.metadata.get("serialize", True) is False:
                 continue
             if isinstance(field.type, str):

mitmproxy/hooks.py

@@ -20,7 +20,7 @@ class Hook:
 
     def args(self) -> list[Any]:
         args = []
-        for field in fields(self):
+        for field in fields(self):  # type: ignore[arg-type]
             args.append(getattr(self, field.name))
         return args
 

mitmproxy/proxy/mode_servers.py

@@ -17,6 +17,7 @@ import json
 import logging
 import os
 import socket
+import sys
 import textwrap
 import typing
 from abc import ABCMeta
@@ -46,6 +47,11 @@ from mitmproxy.proxy.context import Context
 from mitmproxy.proxy.layer import Layer
 from mitmproxy.utils import human
 
+if sys.version_info < (3, 11):
+    from typing_extensions import Self  # pragma: no cover
+else:
+    from typing import Self
+
 logger = logging.getLogger(__name__)
 
 
@@ -79,10 +85,6 @@ class ServerManager(typing.Protocol):
         ...  # pragma: no cover
 
 
-# Python 3.11: Use typing.Self
-Self = TypeVar("Self", bound="ServerInstance")
-
-
 class ServerInstance(Generic[M], metaclass=ABCMeta):
     __modes: ClassVar[dict[str, type[ServerInstance]]] = {}
 
@@ -103,7 +105,7 @@ class ServerInstance(Generic[M], metaclass=ABCMeta):
 
     @classmethod
     def make(
-        cls: type[Self],
+        cls,
         mode: mode_specs.ProxyMode | str,
         manager: ServerManager,
     ) -> Self:

mitmproxy/proxy/mode_specs.py

@@ -22,21 +22,23 @@ Examples:
 from __future__ import annotations
 
 import dataclasses
+import sys
 from abc import ABCMeta
 from abc import abstractmethod
 from dataclasses import dataclass
 from functools import cache
 from typing import ClassVar
 from typing import Literal
-from typing import TypeVar
 
 import mitmproxy_rs
 
 from mitmproxy.coretypes.serializable import Serializable
 from mitmproxy.net import server_spec
 
-# Python 3.11: Use typing.Self
-Self = TypeVar("Self", bound="ProxyMode")
+if sys.version_info < (3, 11):
+    from typing_extensions import Self  # pragma: no cover
+else:
+    from typing import Self
 
 
 @dataclass(frozen=True)  # type: ignore
@@ -92,7 +94,7 @@ class ProxyMode(Serializable, metaclass=ABCMeta):
 
     @classmethod
     @cache
-    def parse(cls: type[Self], spec: str) -> Self:
+    def parse(cls, spec: str) -> Self:
         """
         Parse a proxy mode specification and return the corresponding `ProxyMode` instance.
         """

setup.cfg

@@ -32,7 +32,7 @@ exclude_lines =
 [mypy]
 check_untyped_defs = True
 ignore_missing_imports = True
-files = mitmproxy,examples/addons,release
+files = mitmproxy,examples/addons,release/*.py
 
 [mypy-mitmproxy.contrib.*]
 ignore_errors = True