/usr/lib/python2.7/dist-packages/oslo_rootwrap/jsonrpc.py is in python-oslo.rootwrap 5.1.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | # Copyright (c) 2014 Mirantis Inc.
# All Rights Reserved.
#
# 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.
import base64
import errno
import json
from multiprocessing import connection
from multiprocessing import managers
import socket
import struct
import weakref
from oslo_rootwrap import wrapper
class RpcJSONEncoder(json.JSONEncoder):
def default(self, o):
# We need to pass bytes unchanged as they are expected in arguments for
# and are result of Popen.communicate()
if isinstance(o, bytes):
return {"__bytes__": base64.b64encode(o).decode('ascii')}
# Handle two exception types relevant to command execution
if isinstance(o, wrapper.NoFilterMatched):
return {"__exception__": "NoFilterMatched"}
elif isinstance(o, wrapper.FilterMatchNotExecutable):
return {"__exception__": "FilterMatchNotExecutable",
"match": o.match}
# Other errors will fail to pass JSON encoding and will be visible on
# client side
else:
return super(RpcJSONEncoder, self).default(o)
# Parse whatever RpcJSONEncoder supplied us with
def rpc_object_hook(obj):
if "__exception__" in obj:
type_name = obj.pop("__exception__")
if type_name not in ("NoFilterMatched", "FilterMatchNotExecutable"):
return obj
exc_type = getattr(wrapper, type_name)
return exc_type(**obj)
elif "__bytes__" in obj:
return base64.b64decode(obj["__bytes__"].encode('ascii'))
else:
return obj
class JsonListener(object):
def __init__(self, address, backlog=1):
self.address = address
self._socket = socket.socket(socket.AF_UNIX)
try:
self._socket.setblocking(True)
self._socket.bind(address)
self._socket.listen(backlog)
except socket.error:
self._socket.close()
raise
self.closed = False
self._accepted = weakref.WeakSet()
def accept(self):
while True:
try:
s, _ = self._socket.accept()
except socket.error as e:
if e.errno in (errno.EINVAL, errno.EBADF):
raise EOFError
elif e.errno != errno.EINTR:
raise
else:
break
s.setblocking(True)
conn = JsonConnection(s)
self._accepted.add(conn)
return conn
def close(self):
if not self.closed:
self._socket.shutdown(socket.SHUT_RDWR)
self._socket.close()
self.closed = True
def get_accepted(self):
return self._accepted
if hasattr(managers.Server, 'accepter'):
# In Python 3 accepter() thread has infinite loop. We break it with
# EOFError, so we should silence this error here.
def silent_accepter(self):
try:
old_accepter(self)
except EOFError:
pass
old_accepter = managers.Server.accepter
managers.Server.accepter = silent_accepter
class JsonConnection(object):
def __init__(self, sock):
sock.setblocking(True)
self._socket = sock
def send_bytes(self, s):
self._socket.sendall(struct.pack('!Q', len(s)))
self._socket.sendall(s)
def recv_bytes(self, maxsize=None):
l = struct.unpack('!Q', self.recvall(8))[0]
if maxsize is not None and l > maxsize:
raise RuntimeError("Too big message received")
s = self.recvall(l)
return s
def send(self, obj):
s = self.dumps(obj)
self.send_bytes(s)
def recv(self):
s = self.recv_bytes()
return self.loads(s)
def close(self):
self._socket.close()
def half_close(self):
self._socket.shutdown(socket.SHUT_RD)
# We have to use slow version of recvall with eventlet because of a bug in
# GreenSocket.recv_into:
# https://bitbucket.org/eventlet/eventlet/pull-request/41
def _recvall_slow(self, size):
remaining = size
res = []
while remaining:
piece = self._socket.recv(remaining)
if not piece:
raise EOFError
res.append(piece)
remaining -= len(piece)
return b''.join(res)
def recvall(self, size):
buf = bytearray(size)
mem = memoryview(buf)
got = 0
while got < size:
piece_size = self._socket.recv_into(mem[got:])
if not piece_size:
raise EOFError
got += piece_size
# bytearray is mostly compatible with bytes and we could avoid copying
# data here, but hmac doesn't like it in Python 3.3 (not in 2.7 or 3.4)
return bytes(buf)
@staticmethod
def dumps(obj):
return json.dumps(obj, cls=RpcJSONEncoder).encode('utf-8')
@staticmethod
def loads(s):
res = json.loads(s.decode('utf-8'), object_hook=rpc_object_hook)
try:
kind = res[0]
except (IndexError, TypeError):
pass
else:
# In Python 2 json returns unicode while multiprocessing needs str
if (kind in ("#TRACEBACK", "#UNSERIALIZABLE") and
not isinstance(res[1], str)):
res[1] = res[1].encode('utf-8', 'replace')
return res
class JsonClient(JsonConnection):
def __init__(self, address, authkey=None):
sock = socket.socket(socket.AF_UNIX)
sock.setblocking(True)
sock.connect(address)
super(JsonClient, self).__init__(sock)
if authkey is not None:
connection.answer_challenge(self, authkey)
connection.deliver_challenge(self, authkey)
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