mirror of https://github.com/apache/cassandra
51 lines
1.7 KiB
Python
51 lines
1.7 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
|
|
# or more contributor license agreements. See the NOTICE file
|
|
# distributed with this work for additional information
|
|
# regarding copyright ownership. The ASF licenses this file
|
|
# to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance
|
|
# with the License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from threading import Thread
|
|
from io import StringIO
|
|
from queue import Queue, Empty
|
|
|
|
|
|
class WinPty(object):
|
|
|
|
def __init__(self, stdin):
|
|
self._s = stdin
|
|
self._q = Queue()
|
|
|
|
def _read_next_char(stdin, queue):
|
|
while True:
|
|
char = stdin.read(1) # potentially blocking read
|
|
if char:
|
|
queue.put(char)
|
|
else:
|
|
break
|
|
|
|
self._t = Thread(target=_read_next_char, args=(self._s, self._q))
|
|
self._t.daemon = True
|
|
self._t.start() # read characters asynchronously from stdin
|
|
|
|
def read(self, blksize=-1, timeout=1):
|
|
buf = StringIO()
|
|
count = 0
|
|
try:
|
|
while count < blksize or blksize == -1:
|
|
next = self._q.get(block=timeout is not None, timeout=timeout)
|
|
buf.write(next)
|
|
count = count + 1
|
|
except Empty:
|
|
pass
|
|
return buf.getvalue()
|