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How to use is_websocket_request method in localstack

Best Python code snippet using localstack_python

resource.py

Source:resource.py

1import re2import warnings3from .protocols.base import BaseProtocol4from .exceptions import WebSocketError5try:6    from collections import OrderedDict7except ImportError:8    class OrderedDict:9        pass10class WebSocketApplication(object):11    protocol_class = BaseProtocol12    def __init__(self, ws):13        self.protocol = self.protocol_class(self)14        self.ws = ws15    def handle(self):16        self.protocol.on_open()17        while True:18            try:19                message = self.ws.receive()20            except WebSocketError:21                self.protocol.on_close()22                break23            self.protocol.on_message(message)24    def on_open(self, *args, **kwargs):25        pass26    def on_close(self, *args, **kwargs):27        pass28    def on_message(self, message, *args, **kwargs):29        self.ws.send(message, **kwargs)30    @classmethod31    def protocol_name(cls):32        return cls.protocol_class.PROTOCOL_NAME33class Resource(object):34    def __init__(self, apps=None):35        self.apps = apps if apps else []36        if isinstance(apps, dict):37            if not isinstance(apps, OrderedDict):38                warnings.warn("Using an unordered dictionary for the "39                              "app list is discouraged and may lead to "40                              "undefined behavior.", UserWarning)41            self.apps = apps.items()42    # An app can either be a standard WSGI application (an object we call with43    # __call__(self, environ, start_response)) or a class we instantiate44    # (and which can handle websockets). This function tells them apart.45    # Override this if you have apps that can handle websockets but don't46    # fulfill these criteria.47    def _is_websocket_app(self, app):48        return isinstance(app, type) and issubclass(app, WebSocketApplication)49    def _app_by_path(self, environ_path, is_websocket_request):50        # Which app matched the current path?51        for path, app in self.apps:52            if re.match(path, environ_path):53                if is_websocket_request == self._is_websocket_app(app):54                    return app55        return None56    def app_protocol(self, path):57        # app_protocol will only be called for websocket apps58        app = self._app_by_path(path, True)59        if hasattr(app, 'protocol_name'):60            return app.protocol_name()61        else:62            return ''63    def __call__(self, environ, start_response):64        environ = environ65        is_websocket_call = 'wsgi.websocket' in environ66        current_app = self._app_by_path(environ['PATH_INFO'], is_websocket_call)67        if current_app is None:68            raise Exception("No apps defined")69        if is_websocket_call:70            ws = environ['wsgi.websocket']71            current_app = current_app(ws)72            current_app.ws = ws  # TODO: needed?73            current_app.handle()74            # Always return something, calling WSGI middleware may rely on it75            return []76        else:...

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