Update TLS code to use pathlib. Previously Paths were rejected but now both them and str are accepted.

sanic/http/tls/context.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import os
 import ssl
 
+from pathlib import Path, PurePath
 from typing import Any, Dict, Iterable, Optional, Union
 
 from sanic.log import logger
@@ -39,23 +40,23 @@ def create_context(
 
 
 def shorthand_to_ctx(
-    ctxdef: Union[None, ssl.SSLContext, dict, str]
+    ctxdef: Union[None, ssl.SSLContext, dict, PurePath, str]
 ) -> Optional[ssl.SSLContext]:
     """Convert an ssl argument shorthand to an SSLContext object."""
     if ctxdef is None or isinstance(ctxdef, ssl.SSLContext):
         return ctxdef
-    if isinstance(ctxdef, str):
-        return load_cert_dir(ctxdef)
+    if isinstance(ctxdef, (PurePath, str)):
+        return load_cert_dir(Path(ctxdef))
     if isinstance(ctxdef, dict):
         return CertSimple(**ctxdef)
     raise ValueError(
         f"Invalid ssl argument {type(ctxdef)}."
-        " Expecting a list of certdirs, a dict or an SSLContext."
+        " Expecting one/list of: certdir | dict | SSLContext"
     )
 
 
 def process_to_context(
-    ssldef: Union[None, ssl.SSLContext, dict, str, list, tuple]
+    ssldef: Union[None, ssl.SSLContext, dict, PurePath, str, list, tuple]
 ) -> Optional[ssl.SSLContext]:
     """Process app.run ssl argument from easy formats to full SSLContext."""
     return (
@@ -65,11 +66,11 @@ def process_to_context(
     )
 
 
-def load_cert_dir(p: str) -> ssl.SSLContext:
-    if os.path.isfile(p):
+def load_cert_dir(p: Path) -> ssl.SSLContext:
+    if p.is_file():
         raise ValueError(f"Certificate folder expected but {p} is a file.")
-    keyfile = os.path.join(p, "privkey.pem")
-    certfile = os.path.join(p, "fullchain.pem")
+    keyfile = p / "privkey.pem"
+    certfile = p / "fullchain.pem"
     if not os.access(keyfile, os.R_OK):
         raise ValueError(
             f"Certificate not found or permission denied {keyfile}"