Switch from deprecated telnet to telnetlib3 (#410)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Joongi Kim <me@daybreaker.info>

aiomonitor/telnet.py

@@ -6,10 +6,11 @@
 import os
 import struct
 import sys
-import telnetlib
 import termios
 from typing import Dict, Optional, TextIO, Tuple
 
+import telnetlib3
+
 ModeDef = collections.namedtuple(
     "ModeDef", ["iflag", "oflag", "cflag", "lflag", "ispeed", "ospeed", "cc"]
 )
@@ -61,7 +62,7 @@ def restore_mode(self) -> None:
 
     def determine_mode(self, mode: ModeDef) -> ModeDef:
         # Reference: https://github.com/jquast/telnetlib3/blob/b90616f/telnetlib3/client_shell.py#L76
-        if not self._remote_options[telnetlib.ECHO]:
+        if not self._remote_options[telnetlib3.ECHO]:
             return mode
         iflag = mode.iflag & ~(
             termios.BRKINT
@@ -160,31 +161,31 @@ async def _handle_user_input(self) -> None:
             pass
 
     async def _handle_nego(self, command: bytes, option: bytes) -> None:
-        if command == telnetlib.DO and option == telnetlib.TTYPE:
-            self._conn_writer.write(telnetlib.IAC + telnetlib.WILL + telnetlib.TTYPE)
-            self._conn_writer.write(telnetlib.IAC + telnetlib.SB + telnetlib.TTYPE)
-            self._conn_writer.write(telnetlib.BINARY + self._term.encode("ascii"))
-            self._conn_writer.write(telnetlib.IAC + telnetlib.SE)
+        if command == telnetlib3.DO and option == telnetlib3.TTYPE:
+            self._conn_writer.write(telnetlib3.IAC + telnetlib3.WILL + telnetlib3.TTYPE)
+            self._conn_writer.write(telnetlib3.IAC + telnetlib3.SB + telnetlib3.TTYPE)
+            self._conn_writer.write(telnetlib3.BINARY + self._term.encode("ascii"))
+            self._conn_writer.write(telnetlib3.IAC + telnetlib3.SE)
             await self._conn_writer.drain()
-        elif command == telnetlib.DO and option == telnetlib.NAWS:
-            self._conn_writer.write(telnetlib.IAC + telnetlib.WILL + telnetlib.NAWS)
-            self._conn_writer.write(telnetlib.IAC + telnetlib.SB + telnetlib.NAWS)
+        elif command == telnetlib3.DO and option == telnetlib3.NAWS:
+            self._conn_writer.write(telnetlib3.IAC + telnetlib3.WILL + telnetlib3.NAWS)
+            self._conn_writer.write(telnetlib3.IAC + telnetlib3.SB + telnetlib3.NAWS)
             fmt = "HHHH"
             buf = b"\x00" * struct.calcsize(fmt)
             try:
                 buf = fcntl.ioctl(self._stdin.fileno(), termios.TIOCGWINSZ, buf)
                 rows, cols, _, _ = struct.unpack(fmt, buf)
                 self._conn_writer.write(struct.pack(">HH", cols, rows))
-                self._conn_writer.write(telnetlib.IAC + telnetlib.SE)
+                self._conn_writer.write(telnetlib3.IAC + telnetlib3.SE)
             except OSError:
                 rows, cols = 22, 80
             await self._conn_writer.drain()
-        elif command == telnetlib.WILL:
+        elif command == telnetlib3.WILL:
             self._remote_options[option] = True
-            if option in (telnetlib.ECHO, telnetlib.BINARY, telnetlib.SGA):
-                self._conn_writer.write(telnetlib.IAC + telnetlib.DO + option)
+            if option in (telnetlib3.ECHO, telnetlib3.BINARY, telnetlib3.SGA):
+                self._conn_writer.write(telnetlib3.IAC + telnetlib3.DO + option)
                 await self._conn_writer.drain()
-        elif command == telnetlib.WONT:
+        elif command == telnetlib3.WONT:
             self._remote_options[option] = False
 
     async def _handle_sb(self, option: bytes, chunk: bytes) -> None:
@@ -196,7 +197,7 @@ async def _handle_received(self):
             while not self._conn_reader.at_eof():
                 buf += await self._conn_reader.read(128)
                 while buf:
-                    cmd_begin = buf.find(telnetlib.IAC)
+                    cmd_begin = buf.find(telnetlib3.IAC)
                     if cmd_begin == -1:
                         self._stdout_writer.write(buf)
                         await self._stdout_writer.drain()
@@ -212,20 +213,20 @@ async def _handle_received(self):
                         self._stdout_writer.write(buf_before)
                         await self._stdout_writer.drain()
                         if command in (
-                            telnetlib.WILL,
-                            telnetlib.WONT,
-                            telnetlib.DO,
-                            telnetlib.DONT,
+                            telnetlib3.WILL,
+                            telnetlib3.WONT,
+                            telnetlib3.DO,
+                            telnetlib3.DONT,
                         ):
                             await self._handle_nego(command, option)
-                        elif command == telnetlib.SB:
-                            subnego_end = buf_after.find(telnetlib.IAC + telnetlib.SE)
+                        elif command == telnetlib3.SB:
+                            subnego_end = buf_after.find(telnetlib3.IAC + telnetlib3.SE)
                             if subnego_end == -1:
                                 subnego_chunk = (
                                     buf_after
                                     + (
                                         await self._conn_reader.readuntil(
-                                            telnetlib.IAC + telnetlib.SE
+                                            telnetlib3.IAC + telnetlib3.SE
                                         )
                                     )[:-2]
                                 )

requirements-dev.txt

@@ -15,5 +15,6 @@ ruff==0.7.2
 terminaltables==3.1.10
 towncrier==24.8.0
 types-requests
+telnetlib3==2.0.4
 uvloop==0.21.0
 build==1.2.2.post1

setup.cfg

@@ -45,12 +45,12 @@ install_requires =
     janus>=1.0
     jinja2>=3.1.2
     backports.strenum>=1.2.4; python_version<"3.11"
-    standard-telnetlib>=3.13; python_version>="3.13"
     terminaltables
     trafaret>=2.1.1
     typing-extensions>=4.1
     prompt_toolkit>=3.0
     aioconsole>=0.7.0
+    telnetlib3>=2.0.4
 
 [options.packages.find]
 exclude =