websocket/_core.py¶

The _core.py file

_core.py¶

WebSocket Python client

class websocket._core.WebSocket(get_mask_key=None, sockopt=None, sslopt=None, fire_cont_frame=False, enable_multithread=False, 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 to produce new mask keys, see the set_mask_key function’s docstring for more details
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 option.
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=False, skip_utf8_validation=False, **_)[source]¶

Initialize WebSocket object.

Parameters: sslopt (specify ssl certification verification options) –

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.
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"])

timeout: <type>: socket timeout time. This value is an integer or float. if you set None for this value, it means “use default_timeout value”

Parameters

options –

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.
http_proxy_host: <type>
http proxy host name.
http_proxy_port: <type>
http proxy port. If not set, set to 80.
http_no_proxy: <type>
host names, which doesn’t use proxy.
http_proxy_auth: <type>
http proxy auth information. tuple of username and password. default is None
redirect_limit: <type>
number of redirects to follow.
subprotocols: <type>
array of available sub protocols. default is None.
socket: <type>
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.

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 to send. Please see OPCODE_XXX.

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

Send close data to the server.

Parameters

status (<type>) – status code to send. see STATUS_XXX.
reason (str or bytes) – the reason to close. This must be string or 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

timeout (int or float) – socket timeout time. This value could be either float/integer. if you set None for this value, it means “use default_timeout value”
class (<type>) – 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.
options (<type>) –
- 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: <type>
  custom host header string.
- http_proxy_host: <type>
  http proxy host name.
- http_proxy_port: <type>
  http proxy port. If not set, set to 80.
- http_no_proxy: <type>
  host names, which doesn’t use proxy.
- http_proxy_auth: <type>
  http proxy auth information. tuple of username and password. default is None
- enable_multithread: bool
  enable lock for multithread.
- redirect_limit: <type>
  number of redirects to follow.
- sockopt: <type>
  socket options
- sslopt: <type>
  ssl option
- subprotocols: <type>
  array of available sub protocols. default is None.
- skip_utf8_validation: bool
  skip utf8 validation.
- socket: <type>
  pre-initialized stream socket.