188 lines
6.3 KiB
Python
188 lines
6.3 KiB
Python
###############################################################################
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#
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# The MIT License (MIT)
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#
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# Copyright (c) Crossbar.io Technologies GmbH
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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###############################################################################
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from autobahn.util import public
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from urllib import parse as urlparse
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# The Python urlparse module currently does not contain the ws/wss
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# schemes, so we add those dynamically (which is a hack of course).
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#
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# Important: if you change this stuff (you shouldn't), make sure
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# _all_ our unit tests for WS URLs succeed
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#
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wsschemes = ["ws", "wss"]
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urlparse.uses_relative.extend(wsschemes)
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urlparse.uses_netloc.extend(wsschemes)
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urlparse.uses_params.extend(wsschemes)
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urlparse.uses_query.extend(wsschemes)
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urlparse.uses_fragment.extend(wsschemes)
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__all__ = (
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"create_url",
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"parse_url",
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)
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@public
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def create_url(hostname, port=None, isSecure=False, path=None, params=None):
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"""
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Create a WebSocket URL from components.
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:param hostname: WebSocket server hostname (for TCP/IP sockets) or
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filesystem path (for Unix domain sockets).
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:type hostname: str
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:param port: For TCP/IP sockets, WebSocket service port or ``None`` (to select default
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ports ``80`` or ``443`` depending on ``isSecure``. When ``hostname=="unix"``,
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this defines the path to the Unix domain socket instead of a TCP/IP network socket.
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:type port: int or str
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:param isSecure: Set ``True`` for secure WebSocket (``wss`` scheme).
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:type isSecure: bool
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:param path: WebSocket URL path of addressed resource (will be
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properly URL escaped). Ignored for RawSocket.
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:type path: str
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:param params: A dictionary of key-values to construct the query
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component of the addressed WebSocket resource (will be properly URL
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escaped). Ignored for RawSocket.
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:type params: dict
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:returns: Constructed WebSocket URL.
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:rtype: str
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"""
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# assert type(hostname) == str
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assert type(isSecure) == bool
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if hostname == 'unix':
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netloc = "unix:%s" % port
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else:
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assert port is None or (type(port) == int and port in range(0, 65535))
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if port is not None:
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netloc = "%s:%d" % (hostname, port)
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else:
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if isSecure:
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netloc = "%s:443" % hostname
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else:
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netloc = "%s:80" % hostname
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if isSecure:
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scheme = "wss"
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else:
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scheme = "ws"
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if path is not None:
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ppath = urlparse.quote(path)
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else:
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ppath = "/"
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if params is not None:
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query = urlparse.urlencode(params)
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else:
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query = None
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return urlparse.urlunparse((scheme, netloc, ppath, None, query, None))
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@public
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def parse_url(url):
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"""
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Parses as WebSocket URL into it's components and returns a tuple:
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- ``isSecure`` is a flag which is ``True`` for ``wss`` URLs.
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- ``host`` is the hostname or IP from the URL.
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and for TCP/IP sockets:
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- ``tcp_port`` is the port from the URL or standard port derived from
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scheme (``rs`` => ``80``, ``rss`` => ``443``).
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or for Unix domain sockets:
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- ``uds_path`` is the path on the local host filesystem.
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:param url: A valid WebSocket URL, i.e. ``ws://localhost:9000`` for TCP/IP sockets or
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``ws://unix:/tmp/file.sock`` for Unix domain sockets (UDS).
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:type url: str
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:returns: A 6-tuple ``(isSecure, host, tcp_port, resource, path, params)`` (TCP/IP) or
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``(isSecure, host, uds_path, resource, path, params)`` (UDS).
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:rtype: tuple
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"""
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parsed = urlparse.urlparse(url)
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if parsed.scheme not in ["ws", "wss"]:
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raise Exception("invalid WebSocket URL: protocol scheme '{}' is not for WebSocket".format(parsed.scheme))
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if not parsed.hostname or parsed.hostname == "":
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raise Exception("invalid WebSocket URL: missing hostname")
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if parsed.fragment is not None and parsed.fragment != "":
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raise Exception("invalid WebSocket URL: non-empty fragment '%s" % parsed.fragment)
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if parsed.path is not None and parsed.path != "":
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ppath = parsed.path
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path = urlparse.unquote(ppath)
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else:
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ppath = "/"
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path = ppath
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if parsed.query is not None and parsed.query != "":
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resource = ppath + "?" + parsed.query
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params = urlparse.parse_qs(parsed.query)
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else:
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resource = ppath
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params = {}
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if parsed.hostname == "unix":
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# Unix domain sockets sockets
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# ws://unix:/tmp/file.sock => unix:/tmp/file.sock => /tmp/file.sock
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fp = parsed.netloc + parsed.path
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uds_path = fp.split(':')[1]
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# note: we don't interpret "path" in any further way: it needs to be
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# a path on the local host with a listening Unix domain sockets at the other end ..
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return parsed.scheme == "wss", parsed.hostname, uds_path, resource, path, params
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else:
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# TCP/IP sockets
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if parsed.port is None or parsed.port == "":
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if parsed.scheme == "ws":
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tcp_port = 80
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else:
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tcp_port = 443
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else:
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tcp_port = int(parsed.port)
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if tcp_port < 1 or tcp_port > 65535:
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raise Exception("invalid port {}".format(tcp_port))
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return parsed.scheme == "wss", parsed.hostname, tcp_port, resource, path, params
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