808 lines
25 KiB
Python
808 lines
25 KiB
Python
"""
|
|
websocket - WebSocket client library for Python
|
|
|
|
Copyright (C) 2010 Hiroki Ohtani(liris)
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
"""
|
|
from __future__ import print_function
|
|
|
|
|
|
import six
|
|
import socket
|
|
|
|
try:
|
|
import ssl
|
|
from ssl import SSLError
|
|
if hasattr(ssl, "match_hostname"):
|
|
from ssl import match_hostname
|
|
else:
|
|
from backports.ssl_match_hostname import match_hostname
|
|
|
|
HAVE_SSL = True
|
|
except ImportError:
|
|
# dummy class of SSLError for ssl none-support environment.
|
|
class SSLError(Exception):
|
|
pass
|
|
|
|
HAVE_SSL = False
|
|
|
|
from six.moves.urllib.parse import urlparse
|
|
if six.PY3:
|
|
from base64 import encodebytes as base64encode
|
|
else:
|
|
from base64 import encodestring as base64encode
|
|
|
|
import os
|
|
import struct
|
|
import uuid
|
|
import hashlib
|
|
import logging
|
|
|
|
# websocket modules
|
|
from ._exceptions import *
|
|
from ._abnf import ABNF
|
|
|
|
"""
|
|
websocket python client.
|
|
=========================
|
|
|
|
This version support only hybi-13.
|
|
Please see http://tools.ietf.org/html/rfc6455 for protocol.
|
|
"""
|
|
|
|
|
|
# websocket supported version.
|
|
VERSION = 13
|
|
|
|
# closing frame status codes.
|
|
STATUS_NORMAL = 1000
|
|
STATUS_GOING_AWAY = 1001
|
|
STATUS_PROTOCOL_ERROR = 1002
|
|
STATUS_UNSUPPORTED_DATA_TYPE = 1003
|
|
STATUS_STATUS_NOT_AVAILABLE = 1005
|
|
STATUS_ABNORMAL_CLOSED = 1006
|
|
STATUS_INVALID_PAYLOAD = 1007
|
|
STATUS_POLICY_VIOLATION = 1008
|
|
STATUS_MESSAGE_TOO_BIG = 1009
|
|
STATUS_INVALID_EXTENSION = 1010
|
|
STATUS_UNEXPECTED_CONDITION = 1011
|
|
STATUS_TLS_HANDSHAKE_ERROR = 1015
|
|
|
|
DEFAULT_SOCKET_OPTION = [(socket.SOL_TCP, socket.TCP_NODELAY, 1),]
|
|
if hasattr(socket, "SO_KEEPALIVE"):
|
|
DEFAULT_SOCKET_OPTION.append((socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1))
|
|
if hasattr(socket, "TCP_KEEPIDLE"):
|
|
DEFAULT_SOCKET_OPTION.append((socket.SOL_TCP, socket.TCP_KEEPIDLE, 30))
|
|
if hasattr(socket, "TCP_KEEPINTVL"):
|
|
DEFAULT_SOCKET_OPTION.append((socket.SOL_TCP, socket.TCP_KEEPINTVL, 10))
|
|
if hasattr(socket, "TCP_KEEPCNT"):
|
|
DEFAULT_SOCKET_OPTION.append((socket.SOL_TCP, socket.TCP_KEEPCNT, 3))
|
|
|
|
logger = logging.getLogger()
|
|
|
|
|
|
|
|
default_timeout = None
|
|
traceEnabled = False
|
|
|
|
|
|
def enableTrace(tracable):
|
|
"""
|
|
turn on/off the tracability.
|
|
|
|
tracable: boolean value. if set True, tracability is enabled.
|
|
"""
|
|
global traceEnabled
|
|
traceEnabled = tracable
|
|
if tracable:
|
|
if not logger.handlers:
|
|
logger.addHandler(logging.StreamHandler())
|
|
logger.setLevel(logging.DEBUG)
|
|
|
|
|
|
def setdefaulttimeout(timeout):
|
|
"""
|
|
Set the global timeout setting to connect.
|
|
|
|
timeout: default socket timeout time. This value is second.
|
|
"""
|
|
global default_timeout
|
|
default_timeout = timeout
|
|
|
|
|
|
def getdefaulttimeout():
|
|
"""
|
|
Return the global timeout setting(second) to connect.
|
|
"""
|
|
return default_timeout
|
|
|
|
|
|
def _parse_url(url):
|
|
"""
|
|
parse url and the result is tuple of
|
|
(hostname, port, resource path and the flag of secure mode)
|
|
|
|
url: url string.
|
|
"""
|
|
if ":" not in url:
|
|
raise ValueError("url is invalid")
|
|
|
|
scheme, url = url.split(":", 1)
|
|
|
|
parsed = urlparse(url, scheme="ws")
|
|
if parsed.hostname:
|
|
hostname = parsed.hostname
|
|
else:
|
|
raise ValueError("hostname is invalid")
|
|
port = 0
|
|
if parsed.port:
|
|
port = parsed.port
|
|
|
|
is_secure = False
|
|
if scheme == "ws":
|
|
if not port:
|
|
port = 80
|
|
elif scheme == "wss":
|
|
is_secure = True
|
|
if not port:
|
|
port = 443
|
|
else:
|
|
raise ValueError("scheme %s is invalid" % scheme)
|
|
|
|
if parsed.path:
|
|
resource = parsed.path
|
|
else:
|
|
resource = "/"
|
|
|
|
if parsed.query:
|
|
resource += "?" + parsed.query
|
|
|
|
return (hostname, port, resource, is_secure)
|
|
|
|
|
|
def create_connection(url, timeout=None, **options):
|
|
"""
|
|
connect to url and return websocket object.
|
|
|
|
Connect to url and return the WebSocket object.
|
|
Passing optional timeout parameter will set the timeout on the socket.
|
|
If no timeout is supplied, the global default timeout setting returned by getdefauttimeout() is used.
|
|
You can customize using 'options'.
|
|
If you set "header" list object, you can set your own custom header.
|
|
|
|
>>> conn = create_connection("ws://echo.websocket.org/",
|
|
... header=["User-Agent: MyProgram",
|
|
... "x-custom: header"])
|
|
|
|
|
|
timeout: socket timeout time. This value is integer.
|
|
if you set None for this value, it means "use default_timeout value"
|
|
|
|
|
|
options: "header" -> custom http header list.
|
|
"cookie" -> cookie value.
|
|
"http_proxy_host" - http proxy host name.
|
|
"http_proxy_port" - http proxy port. If not set, set to 80.
|
|
"""
|
|
sockopt = options.get("sockopt", [])
|
|
sslopt = options.get("sslopt", {})
|
|
fire_cont_frame = options.get("fire_cont_frame", False)
|
|
websock = WebSocket(sockopt=sockopt, sslopt=sslopt, fire_cont_frame = fire_cont_frame)
|
|
websock.settimeout(timeout if timeout is not None else default_timeout)
|
|
websock.connect(url, **options)
|
|
return websock
|
|
|
|
_MAX_INTEGER = (1 << 32) -1
|
|
_AVAILABLE_KEY_CHARS = list(range(0x21, 0x2f + 1)) + list(range(0x3a, 0x7e + 1))
|
|
_MAX_CHAR_BYTE = (1<<8) -1
|
|
|
|
# ref. Websocket gets an update, and it breaks stuff.
|
|
# http://axod.blogspot.com/2010/06/websocket-gets-update-and-it-breaks.html
|
|
|
|
|
|
def _create_sec_websocket_key():
|
|
uid = uuid.uuid4()
|
|
return base64encode(uid.bytes).decode('utf-8').strip()
|
|
|
|
|
|
_HEADERS_TO_CHECK = {
|
|
"upgrade": "websocket",
|
|
"connection": "upgrade",
|
|
}
|
|
|
|
|
|
|
|
|
|
class WebSocket(object):
|
|
"""
|
|
Low level WebSocket interface.
|
|
This class is based on
|
|
The WebSocket protocol draft-hixie-thewebsocketprotocol-76
|
|
http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol-76
|
|
|
|
We can connect to the websocket server and send/recieve data.
|
|
The following example is a echo client.
|
|
|
|
>>> import websocket
|
|
>>> ws = websocket.WebSocket()
|
|
>>> ws.connect("ws://echo.websocket.org")
|
|
>>> ws.send("Hello, Server")
|
|
>>> ws.recv()
|
|
'Hello, Server'
|
|
>>> ws.close()
|
|
|
|
get_mask_key: a callable to produce new mask keys, see the set_mask_key
|
|
function's docstring for more details
|
|
sockopt: values for socket.setsockopt.
|
|
sockopt must be tuple and each element is argument of sock.setscokopt.
|
|
sslopt: dict object for ssl socket option.
|
|
fire_cont_frame: fire recv event for each cont frame. default is False
|
|
"""
|
|
|
|
def __init__(self, get_mask_key=None, sockopt=None, sslopt=None,
|
|
fire_cont_frame=False):
|
|
"""
|
|
Initalize WebSocket object.
|
|
"""
|
|
if sockopt is None:
|
|
sockopt = []
|
|
if sslopt is None:
|
|
sslopt = {}
|
|
self.connected = False
|
|
self.sock = None
|
|
self._timeout = None
|
|
self.sockopt = sockopt
|
|
self.sslopt = sslopt
|
|
self.get_mask_key = get_mask_key
|
|
self.fire_cont_frame = fire_cont_frame
|
|
# Buffers over the packets from the layer beneath until desired amount
|
|
# bytes of bytes are received.
|
|
self._recv_buffer = []
|
|
# These buffer over the build-up of a single frame.
|
|
self._frame_header = None
|
|
self._frame_length = None
|
|
self._frame_mask = None
|
|
self._cont_data = None
|
|
|
|
def fileno(self):
|
|
return self.sock.fileno()
|
|
|
|
def set_mask_key(self, func):
|
|
"""
|
|
set function to create musk key. You can custumize mask key generator.
|
|
Mainly, this is for testing purpose.
|
|
|
|
func: callable object. the fuct must 1 argument as integer.
|
|
The argument means length of mask key.
|
|
This func must be return string(byte array),
|
|
which length is argument specified.
|
|
"""
|
|
self.get_mask_key = func
|
|
|
|
def gettimeout(self):
|
|
"""
|
|
Get the websocket timeout(second).
|
|
"""
|
|
return self._timeout
|
|
|
|
def settimeout(self, timeout):
|
|
"""
|
|
Set the timeout to the websocket.
|
|
|
|
timeout: timeout time(second).
|
|
"""
|
|
self._timeout = timeout
|
|
|
|
timeout = property(gettimeout, settimeout)
|
|
|
|
def connect(self, url, **options):
|
|
"""
|
|
Connect to url. url is websocket url scheme. ie. ws://host:port/resource
|
|
You can customize using 'options'.
|
|
If you set "header" list object, you can set your own custom header.
|
|
|
|
>>> ws = WebSocket()
|
|
>>> ws.connect("ws://echo.websocket.org/",
|
|
... header=["User-Agent: MyProgram",
|
|
... "x-custom: header"])
|
|
|
|
timeout: socket timeout time. This value is integer.
|
|
if you set None for this value,
|
|
it means "use default_timeout value"
|
|
|
|
options: "header" -> custom http header list.
|
|
"cookie" -> cookie value.
|
|
"http_proxy_host" - http proxy host name.
|
|
"http_proxy_port" - http proxy port. If not set, set to 80.
|
|
|
|
"""
|
|
|
|
hostname, port, resource, is_secure = _parse_url(url)
|
|
proxy_host, proxy_port = options.get("http_proxy_host", None), options.get("http_proxy_port", 0)
|
|
if not proxy_host:
|
|
addrinfo_list = socket.getaddrinfo(hostname, port, 0, 0, socket.SOL_TCP)
|
|
else:
|
|
proxy_port = proxy_port and proxy_port or 80
|
|
addrinfo_list = socket.getaddrinfo(proxy_host, proxy_port, 0, 0, socket.SOL_TCP)
|
|
|
|
if not addrinfo_list:
|
|
raise WebSocketException("Host not found.: " + hostname + ":" + str(port))
|
|
|
|
family = addrinfo_list[0][0]
|
|
self.sock = socket.socket(family)
|
|
self.sock.settimeout(self.timeout)
|
|
for opts in DEFAULT_SOCKET_OPTION:
|
|
self.sock.setsockopt(*opts)
|
|
for opts in self.sockopt:
|
|
self.sock.setsockopt(*opts)
|
|
# TODO: we need to support proxy
|
|
address = addrinfo_list[0][4]
|
|
self.sock.connect(address)
|
|
|
|
if proxy_host:
|
|
self._tunnel(hostname, port)
|
|
|
|
if is_secure:
|
|
if HAVE_SSL:
|
|
sslopt = dict(cert_reqs=ssl.CERT_REQUIRED,
|
|
ca_certs=os.path.join(os.path.dirname(__file__), "cacert.pem"))
|
|
sslopt.update(self.sslopt)
|
|
self.sock = ssl.wrap_socket(self.sock, **sslopt)
|
|
match_hostname(self.sock.getpeercert(), hostname)
|
|
else:
|
|
raise WebSocketException("SSL not available.")
|
|
|
|
self._handshake(hostname, port, resource, **options)
|
|
|
|
def _tunnel(self, host, port):
|
|
logger.debug("Connecting proxy...")
|
|
connect_header = "CONNECT %s:%d HTTP/1.0\r\n" % (host, port)
|
|
connect_header += "\r\n"
|
|
if traceEnabled:
|
|
logger.debug("--- request header ---")
|
|
logger.debug(connect_header)
|
|
logger.debug("-----------------------")
|
|
|
|
self._send(connect_header)
|
|
|
|
status, resp_headers = self._read_headers()
|
|
if status != 200:
|
|
raise WebSocketException("failed CONNECT via proxy")
|
|
|
|
def _handshake(self, host, port, resource, **options):
|
|
headers = []
|
|
headers.append("GET %s HTTP/1.1" % resource)
|
|
headers.append("Upgrade: websocket")
|
|
headers.append("Connection: Upgrade")
|
|
if port == 80:
|
|
hostport = host
|
|
else:
|
|
hostport = "%s:%d" % (host, port)
|
|
headers.append("Host: %s" % hostport)
|
|
|
|
if "origin" in options:
|
|
headers.append("Origin: %s" % options["origin"])
|
|
else:
|
|
headers.append("Origin: http://%s" % hostport)
|
|
|
|
key = _create_sec_websocket_key()
|
|
headers.append("Sec-WebSocket-Key: %s" % key)
|
|
headers.append("Sec-WebSocket-Version: %s" % VERSION)
|
|
|
|
if "header" in options:
|
|
headers.extend(options["header"])
|
|
cookie = options.get("cookie", None)
|
|
if cookie:
|
|
headers.append("Cookie: %s" % cookie)
|
|
|
|
headers.append("")
|
|
headers.append("")
|
|
|
|
header_str = "\r\n".join(headers)
|
|
self._send(header_str)
|
|
if traceEnabled:
|
|
logger.debug("--- request header ---")
|
|
logger.debug(header_str)
|
|
logger.debug("-----------------------")
|
|
|
|
status, resp_headers = self._read_headers()
|
|
if status != 101:
|
|
self.close()
|
|
raise WebSocketException("Handshake Status %d" % status)
|
|
|
|
success = self._validate_header(resp_headers, key)
|
|
if not success:
|
|
self.close()
|
|
raise WebSocketException("Invalid WebSocket Header")
|
|
|
|
self.connected = True
|
|
|
|
def _validate_header(self, headers, key):
|
|
for k, v in _HEADERS_TO_CHECK.items():
|
|
r = headers.get(k, None)
|
|
if not r:
|
|
return False
|
|
r = r.lower()
|
|
if v != r:
|
|
return False
|
|
|
|
result = headers.get("sec-websocket-accept", None)
|
|
if not result:
|
|
return False
|
|
result = result.lower()
|
|
|
|
if isinstance(result, six.text_type):
|
|
result = result.encode('utf-8')
|
|
|
|
value = (key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11").encode('utf-8')
|
|
hashed = base64encode(hashlib.sha1(value).digest()).strip().lower()
|
|
return hashed == result
|
|
|
|
def _read_headers(self):
|
|
status = None
|
|
headers = {}
|
|
if traceEnabled:
|
|
logger.debug("--- response header ---")
|
|
|
|
while True:
|
|
line = self._recv_line()
|
|
line = line.decode('utf-8')
|
|
if line == "\r\n" or line == "\n":
|
|
break
|
|
line = line.strip()
|
|
if traceEnabled:
|
|
logger.debug(line)
|
|
if not status:
|
|
status_info = line.split(" ", 2)
|
|
status = int(status_info[1])
|
|
else:
|
|
kv = line.split(":", 1)
|
|
if len(kv) == 2:
|
|
key, value = kv
|
|
headers[key.lower()] = value.strip().lower()
|
|
else:
|
|
raise WebSocketException("Invalid header")
|
|
|
|
if traceEnabled:
|
|
logger.debug("-----------------------")
|
|
|
|
return status, headers
|
|
|
|
def send(self, payload, opcode=ABNF.OPCODE_TEXT):
|
|
"""
|
|
Send the data as string.
|
|
|
|
payload: Payload must be utf-8 string or unicoce,
|
|
if the opcode is OPCODE_TEXT.
|
|
Otherwise, it must be string(byte array)
|
|
|
|
opcode: operation code to send. Please see OPCODE_XXX.
|
|
"""
|
|
|
|
frame = ABNF.create_frame(payload, opcode)
|
|
return self.send_frame(frame)
|
|
|
|
def send_frame(self, frame):
|
|
"""
|
|
Send the data frame.
|
|
|
|
frame: frame data created by ABNF.create_frame
|
|
|
|
>>> ws = create_connection("ws://echo.websocket.org/")
|
|
>>> frame = ABNF.create_frame("Hello", ABNF.OPCODE_TEXT)
|
|
>>> ws.send_frame(frame)
|
|
>>> cont_frame = ABNF.create_frame("My name is ", ABNF.OPCODE_CONT, 0)
|
|
>>> ws.send_frame(frame)
|
|
>>> cont_frame = ABNF.create_frame("Foo Bar", ABNF.OPCODE_CONT, 1)
|
|
>>> ws.send_frame(frame)
|
|
|
|
"""
|
|
if self.get_mask_key:
|
|
frame.get_mask_key = self.get_mask_key
|
|
data = frame.format()
|
|
length = len(data)
|
|
if traceEnabled:
|
|
logger.debug("send: " + repr(data))
|
|
while data:
|
|
l = self._send(data)
|
|
data = data[l:]
|
|
return length
|
|
|
|
|
|
def send_binary(self, payload):
|
|
return self.send(payload, ABNF.OPCODE_BINARY)
|
|
|
|
def ping(self, payload=""):
|
|
"""
|
|
send ping data.
|
|
|
|
payload: data payload to send server.
|
|
"""
|
|
self.send(payload, ABNF.OPCODE_PING)
|
|
|
|
def pong(self, payload):
|
|
"""
|
|
send pong data.
|
|
|
|
payload: data payload to send server.
|
|
"""
|
|
self.send(payload, ABNF.OPCODE_PONG)
|
|
|
|
def recv(self):
|
|
"""
|
|
Receive string data(byte array) from the server.
|
|
|
|
return value: string(byte array) value.
|
|
"""
|
|
opcode, data = self.recv_data()
|
|
if six.PY3 and opcode == ABNF.OPCODE_TEXT:
|
|
return data.decode("utf-8")
|
|
return data
|
|
|
|
def recv_data(self, control_frame=False):
|
|
"""
|
|
Recieve data with operation code.
|
|
|
|
control_frame: a boolean flag indicating whether to return control frame
|
|
data, defaults to False
|
|
|
|
return value: tuple of operation code and string(byte array) value.
|
|
"""
|
|
while True:
|
|
frame = self.recv_frame()
|
|
if not frame:
|
|
# handle error:
|
|
# 'NoneType' object has no attribute 'opcode'
|
|
raise WebSocketException("Not a valid frame %s" % frame)
|
|
elif frame.opcode in (ABNF.OPCODE_TEXT, ABNF.OPCODE_BINARY, ABNF.OPCODE_CONT):
|
|
if frame.opcode == ABNF.OPCODE_CONT and not self._cont_data:
|
|
raise WebSocketException("Illegal frame")
|
|
if self._cont_data:
|
|
self._cont_data[1] += frame.data
|
|
else:
|
|
self._cont_data = [frame.opcode, frame.data]
|
|
|
|
if frame.fin or self.fire_cont_frame:
|
|
data = self._cont_data
|
|
self._cont_data = None
|
|
return data
|
|
elif frame.opcode == ABNF.OPCODE_CLOSE:
|
|
self.send_close()
|
|
return (frame.opcode, frame.data)
|
|
elif frame.opcode == ABNF.OPCODE_PING:
|
|
self.pong(frame.data)
|
|
if control_frame:
|
|
return (frame.opcode, frame.data)
|
|
elif frame.opcode == ABNF.OPCODE_PONG:
|
|
if control_frame:
|
|
return (frame.opcode, frame.data)
|
|
|
|
def recv_data_frame(self, control_frame=False):
|
|
"""
|
|
Recieve data with operation code.
|
|
|
|
control_frame: a boolean flag indicating whether to return control frame
|
|
data, defaults to False
|
|
|
|
return value: tuple of operation code and string(byte array) value.
|
|
"""
|
|
while True:
|
|
frame = self.recv_frame()
|
|
if not frame:
|
|
# handle error:
|
|
# 'NoneType' object has no attribute 'opcode'
|
|
raise WebSocketException("Not a valid frame %s" % frame)
|
|
elif frame.opcode in (ABNF.OPCODE_TEXT, ABNF.OPCODE_BINARY, ABNF.OPCODE_CONT):
|
|
if frame.opcode == ABNF.OPCODE_CONT and not self._cont_data:
|
|
raise WebSocketException("Illegal frame")
|
|
if self._cont_data:
|
|
self._cont_data[1].data += frame.data
|
|
else:
|
|
self._cont_data = [frame.opcode, frame]
|
|
|
|
if frame.fin or self.fire_cont_frame:
|
|
data = self._cont_data
|
|
self._cont_data = None
|
|
return data
|
|
elif frame.opcode == ABNF.OPCODE_CLOSE:
|
|
self.send_close()
|
|
return (frame.opcode, frame)
|
|
elif frame.opcode == ABNF.OPCODE_PING:
|
|
self.pong(frame.data)
|
|
if control_frame:
|
|
return (frame.opcode, frame)
|
|
elif frame.opcode == ABNF.OPCODE_PONG:
|
|
if control_frame:
|
|
return (frame.opcode, frame)
|
|
|
|
def recv_frame(self):
|
|
"""
|
|
recieve data as frame from server.
|
|
|
|
return value: ABNF frame object.
|
|
"""
|
|
|
|
# Header
|
|
if self._frame_header is None:
|
|
self._frame_header = self._recv_strict(2)
|
|
|
|
b1 = self._frame_header[0]
|
|
|
|
if six.PY2:
|
|
b1 = ord(b1)
|
|
|
|
fin = b1 >> 7 & 1
|
|
rsv1 = b1 >> 6 & 1
|
|
rsv2 = b1 >> 5 & 1
|
|
rsv3 = b1 >> 4 & 1
|
|
opcode = b1 & 0xf
|
|
b2 = self._frame_header[1]
|
|
|
|
if six.PY2:
|
|
b2 = ord(b2)
|
|
|
|
has_mask = b2 >> 7 & 1
|
|
|
|
# Frame length
|
|
if self._frame_length is None:
|
|
length_bits = b2 & 0x7f
|
|
if length_bits == 0x7e:
|
|
length_data = self._recv_strict(2)
|
|
self._frame_length = struct.unpack("!H", length_data)[0]
|
|
elif length_bits == 0x7f:
|
|
length_data = self._recv_strict(8)
|
|
self._frame_length = struct.unpack("!Q", length_data)[0]
|
|
else:
|
|
self._frame_length = length_bits
|
|
|
|
# Mask
|
|
if self._frame_mask is None:
|
|
self._frame_mask = self._recv_strict(4) if has_mask else ""
|
|
|
|
# Payload
|
|
payload = self._recv_strict(self._frame_length)
|
|
if has_mask:
|
|
payload = ABNF.mask(self._frame_mask, payload)
|
|
|
|
# Reset for next frame
|
|
self._frame_header = None
|
|
self._frame_length = None
|
|
self._frame_mask = None
|
|
|
|
return ABNF(fin, rsv1, rsv2, rsv3, opcode, has_mask, payload)
|
|
|
|
|
|
def send_close(self, status=STATUS_NORMAL, reason=""):
|
|
"""
|
|
send close data to the server.
|
|
|
|
status: status code to send. see STATUS_XXX.
|
|
|
|
reason: the reason to close. This must be string.
|
|
"""
|
|
if status < 0 or status >= ABNF.LENGTH_16:
|
|
raise ValueError("code is invalid range")
|
|
self.send(struct.pack('!H', status) + reason, ABNF.OPCODE_CLOSE)
|
|
|
|
def close(self, status=STATUS_NORMAL, reason=""):
|
|
"""
|
|
Close Websocket object
|
|
|
|
status: status code to send. see STATUS_XXX.
|
|
|
|
reason: the reason to close. This must be string.
|
|
"""
|
|
if self.connected:
|
|
if status < 0 or status >= ABNF.LENGTH_16:
|
|
raise ValueError("code is invalid range")
|
|
|
|
try:
|
|
self.connected = False
|
|
self.send(struct.pack('!H', status) + reason, ABNF.OPCODE_CLOSE)
|
|
timeout = self.sock.gettimeout()
|
|
self.sock.settimeout(3)
|
|
try:
|
|
frame = self.recv_frame()
|
|
if logger.isEnabledFor(logging.ERROR):
|
|
recv_status = struct.unpack("!H", frame.data)[0]
|
|
if recv_status != STATUS_NORMAL:
|
|
logger.error("close status: " + repr(recv_status))
|
|
except:
|
|
pass
|
|
self.sock.settimeout(timeout)
|
|
self.sock.shutdown(socket.SHUT_RDWR)
|
|
except:
|
|
pass
|
|
|
|
self._closeInternal()
|
|
|
|
def _closeInternal(self):
|
|
self.sock.close()
|
|
|
|
def _send(self, data):
|
|
if isinstance(data, six.text_type):
|
|
data = data.encode('utf-8')
|
|
|
|
try:
|
|
return self.sock.send(data)
|
|
except socket.timeout as e:
|
|
message = getattr(e, 'strerror', getattr(e, 'message', ''))
|
|
raise WebSocketTimeoutException(message)
|
|
except Exception as e:
|
|
message = getattr(e, 'strerror', getattr(e, 'message', ''))
|
|
if "timed out" in message:
|
|
raise WebSocketTimeoutException(message)
|
|
else:
|
|
raise
|
|
|
|
def _recv(self, bufsize):
|
|
try:
|
|
bytes = self.sock.recv(bufsize)
|
|
except socket.timeout as e:
|
|
message = getattr(e, 'strerror', getattr(e, 'message', ''))
|
|
raise WebSocketTimeoutException(message)
|
|
except SSLError as e:
|
|
message = getattr(e, 'strerror', getattr(e, 'message', ''))
|
|
if message == "The read operation timed out":
|
|
raise WebSocketTimeoutException(message)
|
|
else:
|
|
raise
|
|
|
|
if not bytes:
|
|
raise WebSocketConnectionClosedException()
|
|
return bytes
|
|
|
|
def _recv_strict(self, bufsize):
|
|
shortage = bufsize - sum(len(x) for x in self._recv_buffer)
|
|
while shortage > 0:
|
|
bytes = self._recv(shortage)
|
|
self._recv_buffer.append(bytes)
|
|
shortage -= len(bytes)
|
|
|
|
unified = six.b("").join(self._recv_buffer)
|
|
|
|
if shortage == 0:
|
|
self._recv_buffer = []
|
|
return unified
|
|
else:
|
|
self._recv_buffer = [unified[bufsize:]]
|
|
return unified[:bufsize]
|
|
|
|
|
|
def _recv_line(self):
|
|
line = []
|
|
while True:
|
|
c = self._recv(1)
|
|
line.append(c)
|
|
if c == six.b("\n"):
|
|
break
|
|
return six.b("").join(line)
|
|
|
|
|
|
|
|
|
|
if __name__ == "__main__":
|
|
enableTrace(True)
|
|
ws = create_connection("ws://echo.websocket.org/")
|
|
print("Sending 'Hello, World'...")
|
|
ws.send("Hello, World")
|
|
print("Sent")
|
|
print("Receiving...")
|
|
result = ws.recv()
|
|
print("Received '%s'" % result)
|
|
ws.close()
|