def read(self, length=None):
"""
Read a line from the socket if no length is specified,
otherwise read ``length`` bytes. Always strip away the newlines.
"""
try:
if length is not None:
bytes_left = length + 2 # read the line ending
if length > self.MAX_READ_LENGTH:
# apparently reading more than 1MB or so from a windows
# socket can cause MemoryErrors. See:
# https://github.com/andymccurdy/redis-py/issues/205
# read smaller chunks at a time to work around this
try:
buf = BytesIO()
while bytes_left > 0:
read_len = min(bytes_left, self.MAX_READ_LENGTH)
buf.write(self._fp.read(read_len))
bytes_left -= read_len
buf.seek(0)
return buf.read(length)
finally:
buf.close()
return self._fp.read(bytes_left)[:-2]
# no length, read a full line
return self._fp.readline()[:-2]
except (socket.error, socket.timeout):
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args, ))
def read(self, length=None):
"""
Read a line from the socket is no length is specified,
otherwise read ``length`` bytes. Always strip away the newlines.
"""
try:
if length is not None:
bytes_left = length + 2 # read the line ending
if length > self.MAX_READ_LENGTH:
# apparently reading more than 1MB or so from a windows
# socket can cause MemoryErrors. See:
# https://github.com/andymccurdy/redis-py/issues/205
# read smaller chunks at a time to work around this
try:
buf = BytesIO()
while bytes_left > 0:
read_len = min(bytes_left, self.MAX_READ_LENGTH)
buf.write(self._fp.read(read_len))
bytes_left -= read_len
buf.seek(0)
return buf.read(length)
finally:
buf.close()
return self._fp.read(bytes_left)[:-2]
# no length, read a full line
return self._fp.readline()[:-2]
except (socket.error, socket.timeout):
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args,))
class SocketBuffer(object):
def __init__(self, socket, socket_read_size):
self._sock = socket
self.socket_read_size = socket_read_size
self._buffer = BytesIO()
# number of bytes written to the buffer from the socket
self.bytes_written = 0
# number of bytes read from the buffer
self.bytes_read = 0
@property
def length(self):
return self.bytes_written - self.bytes_read
def _read_from_socket(self, length=None):
socket_read_size = self.socket_read_size
buf = self._buffer
buf.seek(self.bytes_written)
marker = 0
try:
while True:
data = self._sock.recv(socket_read_size)
# an empty string indicates the server shutdown the socket
if isinstance(data, bytes) and len(data) == 0:
raise socket.error(SERVER_CLOSED_CONNECTION_ERROR)
buf.write(data)
data_length = len(data)
self.bytes_written += data_length
marker += data_length
if length is not None and length > marker:
continue
break
except socket.timeout:
raise TimeoutError("Timeout reading from socket")
except socket.error:
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args,))
def read(self, length):
length = length + 2 # make sure to read the \r\n terminator
# make sure we've read enough data from the socket
if length > self.length:
self._read_from_socket(length - self.length)
self._buffer.seek(self.bytes_read)
data = self._buffer.read(length)
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def readline(self):
buf = self._buffer
buf.seek(self.bytes_read)
data = buf.readline()
while not data.endswith(SYM_CRLF):
# there's more data in the socket that we need
self._read_from_socket()
buf.seek(self.bytes_read)
data = buf.readline()
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def purge(self):
self._buffer.seek(0)
self._buffer.truncate()
self.bytes_written = 0
self.bytes_read = 0
def close(self):
try:
self.purge()
self._buffer.close()
except:
# issue #633 suggests the purge/close somehow raised a
# BadFileDescriptor error. Perhaps the client ran out of
# memory or something else? It's probably OK to ignore
# any error being raised from purge/close since we're
# removing the reference to the instance below.
pass
self._buffer = None
self._sock = None
class SocketBuffer(object):
def __init__(self, socket, socket_read_size):
self._sock = socket
self.socket_read_size = socket_read_size
self._buffer = BytesIO()
# number of bytes written to the buffer from the socket
self.bytes_written = 0
# number of bytes read from the buffer
self.bytes_read = 0
@property
def length(self):
return self.bytes_written - self.bytes_read
def _read_from_socket(self, length=None):
socket_read_size = self.socket_read_size
buf = self._buffer
buf.seek(self.bytes_written)
marker = 0
try:
while True:
data = self._sock.recv(socket_read_size)
# an empty string indicates the server shutdown the socket
if isinstance(data, bytes) and len(data) == 0:
raise socket.error("Connection closed by remote server.")
buf.write(data)
data_length = len(data)
self.bytes_written += data_length
marker += data_length
if length is not None and length > marker:
continue
break
except socket.timeout:
raise TimeoutError("Timeout reading from socket")
except socket.error:
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args,))
def read(self, length):
length = length + 2 # make sure to read the \r\n terminator
# make sure we've read enough data from the socket
if length > self.length:
self._read_from_socket(length - self.length)
self._buffer.seek(self.bytes_read)
data = self._buffer.read(length)
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def readline(self):
buf = self._buffer
buf.seek(self.bytes_read)
data = buf.readline()
while not data.endswith(SYM_CRLF):
# there's more data in the socket that we need
self._read_from_socket()
buf.seek(self.bytes_read)
data = buf.readline()
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def purge(self):
self._buffer.seek(0)
self._buffer.truncate()
self.bytes_written = 0
self.bytes_read = 0
def close(self):
self.purge()
self._buffer.close()
self._buffer = None
self._sock = None
class SocketBuffer(object):
def __init__(self, socket, socket_read_size):
self._sock = socket
self.socket_read_size = socket_read_size
self._buffer = BytesIO()
# number of bytes written to the buffer from the socket
self.bytes_written = 0
# number of bytes read from the buffer
self.bytes_read = 0
@property
def length(self):
return self.bytes_written - self.bytes_read
def _read_from_socket(self, length=None):
socket_read_size = self.socket_read_size
buf = self._buffer
buf.seek(self.bytes_written)
marker = 0
try:
while True:
data = self._sock.recv(socket_read_size)
# an empty string indicates the server shutdown the socket
if isinstance(data, str) and len(data) == 0:
raise socket.error("Connection closed by remote server.")
buf.write(data)
data_length = len(data)
self.bytes_written += data_length
marker += data_length
if length is not None and length > marker:
continue
break
except (socket.error, socket.timeout):
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args, ))
def read(self, length):
length = length + 2 # make sure to read the \r\n terminator
# make sure we've read enough data from the socket
if length > self.length:
self._read_from_socket(length - self.length)
self._buffer.seek(self.bytes_read)
data = self._buffer.read(length)
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def readline(self):
buf = self._buffer
buf.seek(self.bytes_read)
data = buf.readline()
while not data.endswith(SYM_CRLF):
# there's more data in the socket that we need
self._read_from_socket()
buf.seek(self.bytes_read)
data = buf.readline()
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def purge(self):
self._buffer.seek(0)
self._buffer.truncate()
self.bytes_written = 0
self.bytes_read = 0
def close(self):
self.purge()
self._buffer.close()
self._buffer = None
self._sock = None
class SocketBuffer(object):
def __init__(self, socket):
self._sock = socket
self._buffer = BytesIO()
# number of bytes written to the buffer from the socket
self.bytes_written = 0
# number of bytes read from the buffer
self.bytes_read = 0
@property
def length(self):
return self.bytes_written - self.bytes_read
def _read_from_socket(self, length=None):
chunksize = 8192
if length is None:
length = chunksize
buf = self._buffer
buf.seek(self.bytes_written)
marker = 0
try:
while length > marker:
data = self._sock.recv(chunksize)
buf.write(data)
self.bytes_written += len(data)
marker += chunksize
except (socket.error, socket.timeout):
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args,))
def read(self, length):
length = length + 2 # make sure to read the \r\n terminator
# make sure we've read enough data from the socket
if length > self.length:
self._read_from_socket(length - self.length)
self._buffer.seek(self.bytes_read)
data = self._buffer.read(length)
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def readline(self):
buf = self._buffer
buf.seek(self.bytes_read)
data = buf.readline()
while not data.endswith(SYM_CRLF):
# there's more data in the socket that we need
self._read_from_socket()
buf.seek(self.bytes_read)
data = buf.readline()
self.bytes_read += len(data)
return data[:-2]
def purge(self):
self._buffer.seek(0)
self._buffer.truncate()
self.bytes_written = 0
self.bytes_read = 0
def close(self):
self.purge()
self._buffer.close()
self._buffer = None
self._sock = None
class SocketBuffer(object):
MAX_READ_LENGTH = 1000000
def __init__(self, socket):
self._sock = socket
self._buffer = BytesIO()
# number of bytes written to the buffer from the socket
self.bytes_written = 0
# number of bytes read from the buffer
self.bytes_read = 0
@property
def length(self):
return self.bytes_written - self.bytes_read
def _read_from_socket(self, length=None):
chunksize = 8192
if length is None:
length = chunksize
buf = self._buffer
buf.seek(self.bytes_written)
marker = 0
try:
while length > marker:
data = self._sock.recv(chunksize)
buf.write(data)
self.bytes_written += len(data)
marker += chunksize
except (socket.error, socket.timeout):
e = sys.exc_info()[1]
raise ConnectionError("Error while reading from socket: %s" %
(e.args, ))
def read(self, length):
length = length + 2 # make sure to read the \r\n terminator
# make sure we've read enough data from the socket
if length > self.length:
self._read_from_socket(length - self.length)
self._buffer.seek(self.bytes_read)
data = self._buffer.read(length)
self.bytes_read += len(data)
# purge the buffer when we've consumed it all so it doesn't
# grow forever
if self.bytes_read == self.bytes_written:
self.purge()
return data[:-2]
def readline(self):
buf = self._buffer
buf.seek(self.bytes_read)
data = buf.readline()
while not data.endswith(SYM_CRLF):
# there's more data in the socket that we need
self._read_from_socket()
buf.seek(self.bytes_read)
data = buf.readline()
self.bytes_read += len(data)
return data[:-2]
def purge(self):
self._buffer.seek(0)
self._buffer.truncate()
self.bytes_written = 0
self.bytes_read = 0
def close(self):
self.purge()
self._buffer.close()
self._buffer = None
self._sock = None