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|
#!/usr/bin/env python
import atexit
import errno
import os
import random
import readline
import signal
import socket
histfile = os.path.join(os.path.expanduser("~"), ".controller")
try:
readline.read_history_file(histfile)
except IOError:
pass
readline.parse_and_bind("tab: complete")
def complete(commands, text, state):
matches = []
if state == 0:
matches = [c for c in commands if c.startswith(text)]
return matches[state] if state < len(matches) else None
readline.set_completer(
lambda text, state: complete(
["more_pigeon_please", "less_pigeon_please", "solve", "exit"], text, state
)
)
atexit.register(readline.write_history_file, histfile)
def handleMessages(conn):
def interrupt(conn):
signal.signal(signal.SIGINT, signal.SIG_IGN)
conn.sendall(b"interrupt\n")
signal.signal(signal.SIGINT, lambda a, b: interrupt(conn))
data = bytearray()
while True:
while True:
try:
data.extend(conn.recv(4096))
except OSError as e:
if e.errno != errno.EINTR:
raise
except socket.error as e:
code, msg = e
if code != errno.EINTR:
raise
else:
break
pos = data.find(b"\n")
while pos >= 0:
(msg, data) = data.split(b"\n", 1)
msg = msg.decode()
if msg.startswith("finish:"):
msg = msg.split(":")
print(msg[1] + (" (interrupted)" if len(msg) > 2 else ""))
return
elif msg.startswith("Answer:"):
print(msg)
pos = data.find(b"\n")
signal.signal(signal.SIGINT, signal.SIG_IGN)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
for i in range(0, 10):
try:
p = random.randrange(1000, 60000)
s.bind(("", p))
except OSError as e:
if e.errno != errno.EINTR:
raise
except socket.error as e:
code, msg = e
if code != errno.EADDRINUSE:
raise
continue
else:
with open(".controller.PORT", "w") as f:
f.write(str(p))
print("waiting for connections...")
break
raise "no port found"
s.listen(1)
conn, addr = s.accept()
print("")
print("this prompt accepts the following commands:")
print(" solve - start solving")
print(" exit/EOF - terminate the solver")
print(" Ctrl-C - interrupt current search")
print(" less_pigeon_please - select an easy problem")
print(" more_pigeon_please - select a difficult problem")
print("")
pyInt = signal.getsignal(signal.SIGINT)
while True:
signal.signal(signal.SIGINT, pyInt)
try:
try:
input_ = raw_input
except NameError:
input_ = input
line = input_("> ")
signal.signal(signal.SIGINT, signal.SIG_IGN)
except EOFError:
signal.signal(signal.SIGINT, signal.SIG_IGN)
line = "exit"
print(line)
except KeyboardInterrupt:
signal.signal(signal.SIGINT, signal.SIG_IGN)
print
continue
if line == "solve":
conn.sendall(b"solve\n")
handleMessages(conn)
elif line == "exit":
conn.sendall(b"exit\n")
break
elif line in ["less_pigeon_please", "more_pigeon_please"]:
conn.sendall(line.encode() + b"\n")
else:
print("unknown command: " + line)
except KeyboardInterrupt:
raise
finally:
s.close()
|
