def _from_data(cls, message_length: int, header: MessageHeader,
data: io.BytesIO):
# bit vector of query options
flags = int.from_bytes(data.read(4), byteorder='little', signed=False)
# "dbname.collection_name"
full_collection_name = decode_cstring(data)
# number of documents to skip
number_to_skip = int.from_bytes(data.read(4),
byteorder='little',
signed=True)
# number of documents to return in the first OP_REPLY batch
number_to_return = int.from_bytes(data.read(4),
byteorder='little',
signed=True)
# query object
query = bson.decode_object(data)
data_left = data.getvalue()
if data_left:
# Optional. Selector indicating the fields to return.
return_fields_selector = bson.decode_object(data_left)
else:
return_fields_selector = None
return cls(header=header,
flags=flags,
full_collection_name=full_collection_name,
number_to_skip=number_to_skip,
number_to_return=number_to_return,
query=query,
return_fields_selector=return_fields_selector)
def _from_data(cls, message_length: int, header: MessageHeader,
data: io.BytesIO) -> 'OpUpdate':
data.seek(4, io.SEEK_CUR) # 0 - reserved for future use
full_collection_name = decode_cstring(data) # "dbname.collectionname"
flags = int(data.read(4)) # bit vector
selector = bson.decode_object(data) # the query to select the document
update = bson.decode_object(
data) # specification of the update to perform
return cls(header=header,
full_collection_name=full_collection_name,
flags=flags,
selector=selector,
update=update)
def _from_data(cls, message_length: int, header: MessageHeader, data: io.BytesIO) -> 'OpGetMore':
data.seek(4, io.SEEK_CUR) # 0 - reserved for future use
full_collection_name = bson.decode_object(data) # "dbname.collectionname"
number_to_return = int(data.read(4)) # number of documents to return
cursor_id = int(data.read(8)) # cursorID from the OP_REPLY
return cls(header=header, full_collection_name=full_collection_name, number_to_return=number_to_return,
cursor_id=cursor_id)
def _from_data(cls, message_length: int, header: MessageHeader,
data: io.BytesIO):
data.seek(4, io.SEEK_CUR) # 0 - reserved for future use
full_collection_name = decode_cstring(data) # "dbname.collectionname"
flags = int(data.read(4)) # bit vector
selector = bson.decode_object(data) # query object.
return cls(header=header,
full_collection_name=full_collection_name,
flags=flags,
selector=selector)
def _from_data(cls, message_length: int, header: MessageHeader,
data: io.BytesIO):
flags = int.from_bytes(data.read(4), byteorder='little',
signed=True) # bit vector
full_collection_name = decode_cstring(data) # "dbname.collectionname"
documents = bson.decode_object(
data) # one or more documents to insert into the collection
return cls(header=header,
flags=flags,
full_collection_name=full_collection_name,
documents=documents)