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180 lines
5.3 KiB
Python
180 lines
5.3 KiB
Python
"""
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meli - python3 api plugin
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Copyright 2019 Manos Pitsidianakis
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This file is part of meli.
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meli is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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meli is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with meli. If not, see <http://www.gnu.org/licenses/>.
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"""
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from collections import deque
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import errno
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import json
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import msgpack
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import socket
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import struct
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import sys
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import time
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class IPCError(Exception):
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pass
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class UnknownMessageClass(IPCError):
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pass
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class InvalidSerialization(IPCError):
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pass
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class ConnectionClosed(IPCError):
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pass
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def _read_objects(sock):
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unpacker = msgpack.Unpacker()
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ret = []
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#reader = socket.socket.makefile(sock, 'rb')
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while True:
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try:
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buf = sock.recv(1024**2)
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if not buf:
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break
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unpacker.feed(buf)
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for o in unpacker:
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ret.append(o)
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except:
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break
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return ret
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#try:
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# for unpack in unpacker:
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# return unpack
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#except Exception as e:
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# print("[libmeliapi]: ", "_read_objects error ", e, file=sys.stderr,)
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# return None
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#finally:
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# reader.flush()
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def _write_objects(sock, objects):
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sys.stderr.flush()
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print("[libmeliapi]: ", "_write_objects ", objects, flush=True, file=sys.stderr, )
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data = msgpack.packb(objects)
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#print("[libmeliapi]: ", "_write_objects data ", data, flush=True, file=sys.stderr, )
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sent = 0
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while sent < len(data):
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try:
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_len = min(len(data[sent:]), 2048)
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sent += sock.send(data[sent:sent+_len])
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except IOError as e:
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print("[libmeliapi]: IOError: ", e, e.errno, flush=True, file=sys.stderr, )
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sys.stderr.flush()
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if e.errno == errno.EWOULDBLOCK:
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break
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elif e.errno == errno.EAGAIN:
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time.sleep(0.001)
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continue
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else:
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raise
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class Client(object):
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def __init__(self, server_address):
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self.buffer = deque()
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self.addr = server_address
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address_family = socket.AF_UNIX
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self.sock = socket.socket(address_family, socket.SOCK_STREAM)
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self.sock.setblocking(0)
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def connect(self):
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try:
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self.sock.connect(self.addr)
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print("[libmeliapi]: ", "self.send({ \"version\": \"dev\" }) = ",self.send({ "version": "dev" }), flush=True, file=sys.stderr)
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self.expect_ack()
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self._session = self.read()
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self.ack()
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print("[libmeliapi]: ", "self.buffer =", self.buffer, flush=True, file=sys.stderr, )
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print("[libmeliapi]: ", "connected, session id is", self._session, flush=True, file=sys.stderr)
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except socket.error as msg:
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print("[libmeliapi]: ", msg, flush=True, file=sys.stderr, )
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sys.stderr.flush()
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sys.exit(1)
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def close(self):
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self.sock.close()
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def setblocking(self, new_val):
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self.sock.setblocking(new_val)
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def __enter__(self):
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self.connect()
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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def send(self, objects):
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sys.stderr.flush()
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#print("[libmeliapi]: ", "stuck in send ", self.buffer, flush=True, file=sys.stderr, )
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_write_objects(self.sock, objects)
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#print("[libmeliapi]: ", "unstuck wrote objs", flush=True, file=sys.stderr, )
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#print("[libmeliapi]: ", "wrote object ", objects, file=sys.stderr)
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time.sleep(0.001)
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def ack(self):
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sys.stderr.flush()
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_write_objects(self.sock, 0x06)
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time.sleep(0.001)
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def expect_ack(self):
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#print("[libmeliapi]: expect_ack, ", self.buffer, flush=True, file=sys.stderr, )
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while True:
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time.sleep(0.1)
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read_list = _read_objects(self.sock)
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self.buffer.extend(read_list)
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try:
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self.buffer.remove(0x6)
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#print("[libmeliapi]: got_ack, ", self.buffer, flush=True, file=sys.stderr, )
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return
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except ValueError:
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pass
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def read(self):
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sys.stderr.flush()
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#print("[libmeliapi]: ", "stuck in read ", self.buffer, flush=True, file=sys.stderr, )
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read_list = _read_objects(self.sock)
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time.sleep(0.01)
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self.buffer.extend(read_list)
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#print("[libmeliapi]: ", "unstuck read self.buffer =", self.buffer, flush=True, file=sys.stderr, )
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if len(self.buffer) > 0:
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return self.buffer.popleft()
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else:
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return None
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@property
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def backend_fn_type(self):
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return 0
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@property
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def backend_op_fn_type(self):
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return 1
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def ok_send(self, objects):
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self.send({"t": "ok", "c": objects })
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self.expect_ack()
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def err_send(self, objects):
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self.send({"t": "err", "c": objects })
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self.expect_ack()
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