feat: cert_manager detect file change

src/cert_manager.py

@@ -17,6 +17,7 @@ class CertManager:
     __slots__ = [
         "certbot_conf",
         "certbot_www",
+        "last_file_change",
         "logger",
         "self_signed_path",
         "with_certbot",
@@ -32,6 +33,7 @@ class CertManager:
         self.certbot_www: pathlib.Path = pathlib.Path(params.certbot_www)
         self.self_signed_path: pathlib.Path = pathlib.Path(params.self_signed_path)
         self.with_certbot: bool = params.with_certbot
+        self.last_file_change: int | float = 0
 
     def init(self, hosts: list[str]) -> None:
         self.logger.debug("Initializing...")
@@ -187,6 +189,7 @@ class CertManager:
             return None
         cert_file = self.get_cert(default_host)
         key_file = self.get_key(default_host)
+        self.last_file_change = cert_file.stat().st_mtime
         context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
         context.load_cert_chain(
             cert_file,
@@ -195,6 +198,13 @@ class CertManager:
         context.sni_callback = self.__sni_callback
         return context
 
+    def detect_default_cert_change(self, default_host: str) -> bool:
+        cert_file = self.get_cert(default_host)
+        if cert_file.exists() and cert_file.stat().st_mtime != self.last_file_change:
+            self.logger.debug("Detected change: %s", cert_file)
+            return True
+        return False
+
     def __sni_callback(
         self, socket: ssl.SSLObject, host: str | None, _: ssl.SSLContext, /
     ) -> None | int: