websocket/_core.py

The _core.py file

class websocket._core.WebSocket(get_mask_key=None, sockopt=None, sslopt=None, fire_cont_frame=False, enable_multithread=True, skip_utf8_validation=False, **_)[source]

Low level WebSocket interface.

This class is based on the WebSocket protocol draft-hixie-thewebsocketprotocol-76

We can connect to the websocket server and send/receive data. The following example is an echo client.

>>> import websocket
>>> ws = websocket.WebSocket()
>>> ws.connect("ws://echo.websocket.org")
>>> ws.send("Hello, Server")
>>> ws.recv()
'Hello, Server'
>>> ws.close()

Parameters

get_mask_key (func) – A callable function to get new mask keys, see the WebSocket.set_mask_key’s docstring for more information.
sockopt (tuple) – Values for socket.setsockopt. sockopt must be tuple and each element is argument of sock.setsockopt.
sslopt (dict) – Optional dict object for ssl socket options. See FAQ for details.
fire_cont_frame (bool) – Fire recv event for each cont frame. Default is False.
enable_multithread (bool) – If set to True, lock send method.
skip_utf8_validation (bool) – Skip utf8 validation.

__init__(get_mask_key=None, sockopt=None, sslopt=None, fire_cont_frame=False, enable_multithread=True, skip_utf8_validation=False, **_)[source]

Initialize WebSocket object.

Parameters: sslopt (dict) – Optional dict object for ssl socket options. See FAQ for details.

abort()[source]: Low-level asynchronous abort, wakes up other threads that are waiting in recv_*

close(status=1000, reason=b'', timeout=3)[source]

Close Websocket object

Parameters

status (int) – Status code to send. See STATUS_XXX.
reason (bytes) – The reason to close in UTF-8.
timeout (int or float) – Timeout until receive a close frame. If None, it will wait forever until receive a close frame.

connect(url, **options)[source]

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"])

Parameters

header (list or dict) – Custom http header list or dict.
cookie (str) – Cookie value.
origin (str) – Custom origin url.
connection (str) – Custom connection header value. Default value “Upgrade” set in _handshake.py
suppress_origin (bool) – Suppress outputting origin header.
host (str) – Custom host header string.
timeout (int or float) – Socket timeout time. This value is an integer or float. If you set None for this value, it means “use default_timeout value”
http_proxy_host (str) – HTTP proxy host name.
http_proxy_port (str or int) – HTTP proxy port. Default is 80.
http_no_proxy (list) – Whitelisted host names that don’t use the proxy.
http_proxy_auth (tuple) – HTTP proxy auth information. Tuple of username and password. Default is None.
redirect_limit (int) – Number of redirects to follow.
subprotocols (list) – List of available subprotocols. Default is None.
socket (socket) – Pre-initialized stream socket.

getheaders()[source]: Get handshake response header

getstatus()[source]: Get handshake status

getsubprotocol()[source]: Get subprotocol

gettimeout()[source]

Get the websocket timeout (in seconds) as an int or float

Returns: timeout – returns timeout value (in seconds). This value could be either float/integer.
Return type: int or float

property headers: Get handshake response header

ping(payload='')[source]

Send ping data.

Parameters: payload (str) – data payload to send server.

pong(payload='')[source]

Send pong data.

Parameters: payload (str) – data payload to send server.

recv()[source]

Receive string data(byte array) from the server.

Returns: data
Return type: string (byte array) value.

recv_data(control_frame=False)[source]

Receive data with operation code.

Parameters: control_frame (bool) – a boolean flag indicating whether to return control frame data, defaults to False
Returns: opcode, frame.data – tuple of operation code and string(byte array) value.
Return type: tuple

recv_data_frame(control_frame=False)[source]

Receive data with operation code.

If a valid ping message is received, a pong response is sent.

Parameters: control_frame (bool) – a boolean flag indicating whether to return control frame data, defaults to False
Returns: frame.opcode, frame – tuple of operation code and string(byte array) value.
Return type: tuple

recv_frame()[source]

Receive data as frame from server.

Returns: self.frame_buffer.recv_frame()
Return type: ABNF frame object

send(payload, opcode=1)[source]

Send the data as string.

Parameters

payload (str) – Payload must be utf-8 string or unicode, If the opcode is OPCODE_TEXT. Otherwise, it must be string(byte array).
opcode (int) – Operation code (opcode) to send.

send_binary(payload)[source]

Send a binary message (OPCODE_BINARY).

Parameters: payload (bytes) – payload of message to send.

send_close(status=1000, reason=b'')[source]

Send close data to the server.

Parameters

status (int) – Status code to send. See STATUS_XXX.
reason (str or bytes) – The reason to close. This must be string or UTF-8 bytes.

send_frame(frame)[source]

Send the data 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)

Parameters: frame (ABNF frame) – frame data created by ABNF.create_frame

set_mask_key(func)[source]

Set function to create mask key. You can customize mask key generator. Mainly, this is for testing purpose.

Parameters: func (func) – callable object. the func takes 1 argument as integer. The argument means length of mask key. This func must return string(byte array), which length is argument specified.

settimeout(timeout)[source]

Set the timeout to the websocket.

Parameters: timeout (int or float) – timeout time (in seconds). This value could be either float/integer.

shutdown()[source]: close socket, immediately.

property status: Get handshake status

property subprotocol: Get subprotocol

property timeout

Get the websocket timeout (in seconds) as an int or float

Returns: timeout – returns timeout value (in seconds). This value could be either float/integer.
Return type: int or float

websocket._core.create_connection(url, timeout=None, class_=<class 'websocket._core.WebSocket'>, **options)[source]

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 getdefaulttimeout() 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"])

Parameters

class (class) – class to instantiate when creating the connection. It has to implement settimeout and connect. It’s __init__ should be compatible with WebSocket.__init__, i.e. accept all of it’s kwargs.
header (list or dict) – custom http header list or dict.
cookie (str) – Cookie value.
origin (str) – custom origin url.
suppress_origin (bool) – suppress outputting origin header.
host (str) – custom host header string.
timeout (int or float) – socket timeout time. This value could be either float/integer. If set to None, it uses the default_timeout value.
http_proxy_host (str) – HTTP proxy host name.
http_proxy_port (str or int) – HTTP proxy port. If not set, set to 80.
http_no_proxy (list) – Whitelisted host names that don’t use the proxy.
http_proxy_auth (tuple) – HTTP proxy auth information. tuple of username and password. Default is None.
enable_multithread (bool) – Enable lock for multithread.
redirect_limit (int) – Number of redirects to follow.
sockopt (tuple) – Values for socket.setsockopt. sockopt must be a tuple and each element is an argument of sock.setsockopt.
sslopt (dict) – Optional dict object for ssl socket options. See FAQ for details.
subprotocols (list) – List of available subprotocols. Default is None.
skip_utf8_validation (bool) – Skip utf8 validation.
socket (socket) – Pre-initialized stream socket.