revert 17c6124a57

revert Minify.

src/snekssh/app4.py

@@ -1,24 +1,90 @@
 #!/usr/bin/env python3.7
-import asyncio,sys
+#
+# Copyright (c) 2013-2024 by Ron Frederick <ronf@timeheart.net> and others.
+#
+# This program and the accompanying materials are made available under
+# the terms of the Eclipse Public License v2.0 which accompanies this
+# distribution and is available at:
+#
+#     http://www.eclipse.org/legal/epl-2.0/
+#
+# This program may also be made available under the following secondary
+# licenses when the conditions for such availability set forth in the
+# Eclipse Public License v2.0 are satisfied:
+#
+#    GNU General Public License, Version 2.0, or any later versions of
+#    that license
+#
+# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
+#
+# Contributors:
+#     Ron Frederick - initial implementation, API, and documentation
+
+# To run this program, the file ``ssh_host_key`` must exist with an SSH
+# private key in it to use as a server host key. An SSH host certificate
+# can optionally be provided in the file ``ssh_host_key-cert.pub``.
+
+import asyncio
+import sys
 from typing import Optional
-import asyncssh,bcrypt
-passwords={'guest':b'','user':bcrypt.hashpw(b'user',bcrypt.gensalt())}
-def handle_client(process):A=process;B=A.get_extra_info('username');A.stdout.write(f"Welcome to my SSH server, {B}!\n")
+
+import asyncssh
+import bcrypt
+
+passwords = {
+    "guest": b"",  # guest account with no password
+    "user": bcrypt.hashpw(b"user", bcrypt.gensalt()),
+}
+
+
+def handle_client(process: asyncssh.SSHServerProcess) -> None:
+    username = process.get_extra_info("username")
+    process.stdout.write(f"Welcome to my SSH server, {username}!\n")
+    # process.exit(0)
+
+
 class MySSHServer(asyncssh.SSHServer):
-	def connection_made(B,conn):A=conn.get_extra_info('peername')[0];print(f"SSH connection received from {A}.")
-	def connection_lost(A,exc):
-		if exc:print('SSH connection error: '+str(exc),file=sys.stderr)
-		else:print('SSH connection closed.')
-	def begin_auth(A,username):return passwords.get(username)!=b''
-	def password_auth_supported(A):return True
-	def validate_password(D,username,password):
-		A=password;B=username
-		if B not in passwords:return False
-		C=passwords[B]
-		if not A and not C:return True
-		return bcrypt.checkpw(A.encode('utf-8'),C)
-async def start_server():await asyncssh.create_server(MySSHServer,'',2231,server_host_keys=['ssh_host_key'],process_factory=handle_client)
-loop=asyncio.new_event_loop()
-try:loop.run_until_complete(start_server())
-except(OSError,asyncssh.Error)as exc:sys.exit('Error starting server: '+str(exc))
-loop.run_forever()
+    def connection_made(self, conn: asyncssh.SSHServerConnection) -> None:
+        peername = conn.get_extra_info("peername")[0]
+        print(f"SSH connection received from {peername}.")
+
+    def connection_lost(self, exc: Optional[Exception]) -> None:
+        if exc:
+            print("SSH connection error: " + str(exc), file=sys.stderr)
+        else:
+            print("SSH connection closed.")
+
+    def begin_auth(self, username: str) -> bool:
+        # If the user's password is the empty string, no auth is required
+        return passwords.get(username) != b""
+
+    def password_auth_supported(self) -> bool:
+        return True
+
+    def validate_password(self, username: str, password: str) -> bool:
+        if username not in passwords:
+            return False
+        pw = passwords[username]
+        if not password and not pw:
+            return True
+        return bcrypt.checkpw(password.encode("utf-8"), pw)
+
+
+async def start_server() -> None:
+    await asyncssh.create_server(
+        MySSHServer,
+        "",
+        2231,
+        server_host_keys=["ssh_host_key"],
+        process_factory=handle_client,
+    )
+
+
+loop = asyncio.new_event_loop()
+
+try:
+    loop.run_until_complete(start_server())
+except (OSError, asyncssh.Error) as exc:
+    sys.exit("Error starting server: " + str(exc))
+
+loop.run_forever()