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# Licensed 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.
# Based on ASL2 code from:
# https://gist.github.com/tim-patterson/4471877
import sys
import io
import threading
import socketserver
import code
class ThreadLocalProxy(object):
def __init__(self, default):
self.files = {}
self.default = default
def __getattr__(self, name):
obj = self.files.get(threading.current_thread(), self.default)
return getattr(obj, name)
def register(self, obj):
self.files[threading.current_thread()] = obj
def unregister(self):
self.files.pop(threading.current_thread())
class REPLHandler(socketserver.StreamRequestHandler):
def handle(self):
sys.stdout.register(io.TextIOWrapper(self.wfile, 'utf8'))
sys.stderr.register(io.TextIOWrapper(self.wfile, 'utf8'))
sys.stdin.register(io.TextIOWrapper(self.rfile, 'utf8'))
try:
console = code.InteractiveConsole(locals())
console.interact('Console:')
except Exception:
pass
finally:
sys.stdout.unregister()
sys.stderr.unregister()
sys.stdin.unregister()
class REPLThreadedTCPServer(socketserver.ThreadingMixIn,
socketserver.TCPServer):
daemon_threads = True
allow_reuse_address = True
def __init__(self, scheduler, *args, **kw):
self.scheduler = scheduler
super(REPLThreadedTCPServer, self).__init__(*args, **kw)
sys.stdout = ThreadLocalProxy(sys.stdout)
sys.stderr = ThreadLocalProxy(sys.stderr)
sys.stdin = ThreadLocalProxy(sys.stdin)
class REPLServer(object):
def __init__(self, scheduler):
self.server = REPLThreadedTCPServer(
scheduler, ('localhost', 3000), REPLHandler)
def start(self):
self.thread = threading.Thread(target=self.server.serve_forever)
self.thread.daemon = True
self.thread.start()
def stop(self):
self.server.shutdown()
self.server.server_close()
self.thread.join(10)
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