Mercurial > vim
view runtime/tools/demoserver.py @ 34074:1629cc65d78d v9.1.0006
patch 9.1.0006: is*() and to*() function may be unsafe
Commit: https://github.com/vim/vim/commit/184f71cc6868a240dc872ed2852542bbc1d43e28
Author: Keith Thompson <Keith.S.Thompson@gmail.com>
Date: Thu Jan 4 21:19:04 2024 +0100
patch 9.1.0006: is*() and to*() function may be unsafe
Problem: is*() and to*() function may be unsafe
Solution: Add SAFE_* macros and start using those instead
(Keith Thompson)
Use SAFE_() macros for is*() and to*() functions
The standard is*() and to*() functions declared in <ctype.h> have
undefined behavior for negative arguments other than EOF. If plain char
is signed, passing an unchecked value from argv for from user input
to one of these functions has undefined behavior.
Solution: Add SAFE_*() macros that cast the argument to unsigned char.
Most implementations behave sanely for negative arguments, and most
character values in practice are non-negative, but it's still best
to avoid undefined behavior.
The change from #13347 has been omitted, as this has already been
separately fixed in commit ac709e2fc0db6d31abb7da96f743c40956b60c3a
(v9.0.2054)
fixes: #13332
closes: #13347
Signed-off-by: Keith Thompson <Keith.S.Thompson@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Thu, 04 Jan 2024 21:30:04 +0100 |
parents | dce918af0c00 |
children |
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line source
#!/usr/bin/python # # Server that will accept connections from a Vim channel. # Run this server and then in Vim you can open the channel: # :let handle = ch_open('localhost:8765') # # Then Vim can send requests to the server: # :let response = ch_sendexpr(handle, 'hello!') # # And you can control Vim by typing a JSON message here, e.g.: # ["ex","echo 'hi there'"] # # There is no prompt, just type a line and press Enter. # To exit cleanly type "quit<Enter>". # # See ":help channel-demo" in Vim. # # This requires Python 2.6 or later. from __future__ import print_function import json import socket import sys import threading try: # Python 3 import socketserver except ImportError: # Python 2 import SocketServer as socketserver thesocket = None class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler): def handle(self): print("=== socket opened ===") global thesocket thesocket = self.request while True: try: data = self.request.recv(4096).decode('utf-8') except socket.error: print("=== socket error ===") break if data == '': print("=== socket closed ===") break print("received: {0}".format(data)) try: decoded = json.loads(data) except ValueError: print("json decoding failed") decoded = [-1, ''] # Send a response if the sequence number is positive. # Negative numbers are used for "eval" responses. if decoded[0] >= 0: if decoded[1] == 'hello!': response = "got it" id = decoded[0] elif decoded[1] == 'hello channel!': response = "got that" # response is not to a specific message callback but to the # channel callback, need to use ID zero id = 0 else: response = "what?" id = decoded[0] encoded = json.dumps([id, response]) print("sending {0}".format(encoded)) self.request.sendall(encoded.encode('utf-8')) thesocket = None class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer): pass if __name__ == "__main__": HOST, PORT = "localhost", 8765 server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler) ip, port = server.server_address # Start a thread with the server -- that thread will then start one # more thread for each request server_thread = threading.Thread(target=server.serve_forever) # Exit the server thread when the main thread terminates server_thread.daemon = True server_thread.start() print("Server loop running in thread: ", server_thread.name) print("Listening on port {0}".format(PORT)) while True: typed = sys.stdin.readline() if "quit" in typed: print("Goodbye!") break if thesocket is None: print("No socket yet") else: print("sending {0}".format(typed)) thesocket.sendall(typed.encode('utf-8')) server.shutdown() server.server_close()