/usr/share/pyshared/pymongo/message.py is in python-pymongo 2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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.
"""Tools for creating `messages
<http://www.mongodb.org/display/DOCS/Mongo+Wire+Protocol>`_ to be sent to
MongoDB.
.. note:: This module is for internal use and is generally not needed by
application developers.
.. versionadded:: 1.1.2
"""
import random
import struct
import bson
from bson.son import SON
try:
from pymongo import _cmessage
_use_c = True
except ImportError:
_use_c = False
from pymongo.errors import InvalidOperation
__ZERO = "\x00\x00\x00\x00"
MAX_INT32 = 2147483647
MIN_INT32 = -2147483648
def __last_error(args):
"""Data to send to do a lastError.
"""
cmd = SON([("getlasterror", 1)])
cmd.update(args)
return query(0, "admin.$cmd", 0, -1, cmd)
def __pack_message(operation, data):
"""Takes message data and adds a message header based on the operation.
Returns the resultant message string.
"""
request_id = random.randint(MIN_INT32, MAX_INT32)
message = struct.pack("<i", 16 + len(data))
message += struct.pack("<i", request_id)
message += __ZERO # responseTo
message += struct.pack("<i", operation)
return (request_id, message + data)
def insert(collection_name, docs, check_keys,
safe, last_error_args, continue_on_error, uuid_subtype):
"""Get an **insert** message.
"""
max_bson_size = 0
options = 0
if continue_on_error:
options += 1
data = struct.pack("<i", options)
data += bson._make_c_string(collection_name)
encoded = [bson.BSON.encode(doc, check_keys, uuid_subtype) for doc in docs]
if not encoded:
raise InvalidOperation("cannot do an empty bulk insert")
max_bson_size = max(map(len, encoded))
data += "".join(encoded)
if safe:
(_, insert_message) = __pack_message(2002, data)
(request_id, error_message, _) = __last_error(last_error_args)
return (request_id, insert_message + error_message, max_bson_size)
else:
(request_id, insert_message) = __pack_message(2002, data)
return (request_id, insert_message, max_bson_size)
if _use_c:
insert = _cmessage._insert_message
def update(collection_name, upsert, multi,
spec, doc, safe, last_error_args, check_keys, uuid_subtype):
"""Get an **update** message.
"""
options = 0
if upsert:
options += 1
if multi:
options += 2
data = __ZERO
data += bson._make_c_string(collection_name)
data += struct.pack("<i", options)
data += bson.BSON.encode(spec, False, uuid_subtype)
encoded = bson.BSON.encode(doc, check_keys, uuid_subtype)
data += encoded
if safe:
(_, update_message) = __pack_message(2001, data)
(request_id, error_message, _) = __last_error(last_error_args)
return (request_id, update_message + error_message, len(encoded))
else:
(request_id, update_message) = __pack_message(2001, data)
return (request_id, update_message, len(encoded))
if _use_c:
update = _cmessage._update_message
def query(options, collection_name, num_to_skip,
num_to_return, query, field_selector=None, uuid_subtype=4):
"""Get a **query** message.
"""
data = struct.pack("<I", options)
data += bson._make_c_string(collection_name)
data += struct.pack("<i", num_to_skip)
data += struct.pack("<i", num_to_return)
encoded = bson.BSON.encode(query, False, uuid_subtype)
data += encoded
max_bson_size = len(encoded)
if field_selector is not None:
encoded = bson.BSON.encode(field_selector, False, uuid_subtype)
data += encoded
max_bson_size = max(len(encoded), max_bson_size)
(request_id, query_message) = __pack_message(2004, data)
return (request_id, query_message, max_bson_size)
if _use_c:
query = _cmessage._query_message
def get_more(collection_name, num_to_return, cursor_id):
"""Get a **getMore** message.
"""
data = __ZERO
data += bson._make_c_string(collection_name)
data += struct.pack("<i", num_to_return)
data += struct.pack("<q", cursor_id)
return __pack_message(2005, data)
if _use_c:
get_more = _cmessage._get_more_message
def delete(collection_name, spec, safe, last_error_args, uuid_subtype):
"""Get a **delete** message.
"""
data = __ZERO
data += bson._make_c_string(collection_name)
data += __ZERO
encoded = bson.BSON.encode(spec, False, uuid_subtype)
data += encoded
if safe:
(_, remove_message) = __pack_message(2006, data)
(request_id, error_message, _) = __last_error(last_error_args)
return (request_id, remove_message + error_message, len(encoded))
else:
(request_id, remove_message) = __pack_message(2006, data)
return (request_id, remove_message, len(encoded))
def kill_cursors(cursor_ids):
"""Get a **killCursors** message.
"""
data = __ZERO
data += struct.pack("<i", len(cursor_ids))
for cursor_id in cursor_ids:
data += struct.pack("<q", cursor_id)
return __pack_message(2007, data)
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