Support setting socketio_path to the root URL (Fixes #242)

src/engineio/async_drivers/asgi.py

@@ -43,14 +43,18 @@ def __init__(self, engineio_server, other_asgi_app=None,
                  on_startup=None, on_shutdown=None):
         self.engineio_server = engineio_server
         self.other_asgi_app = other_asgi_app
-        self.engineio_path = engineio_path.strip('/')
+        self.engineio_path = engineio_path
+        if not self.engineio_path.startswith('/'):
+            self.engineio_path = '/' + self.engineio_path
+        if not self.engineio_path.endswith('/'):
+            self.engineio_path += '/'
         self.static_files = static_files or {}
         self.on_startup = on_startup
         self.on_shutdown = on_shutdown
 
     async def __call__(self, scope, receive, send):
         if scope['type'] in ['http', 'websocket'] and \
-                scope['path'].startswith('/{0}/'.format(self.engineio_path)):
+                scope['path'].startswith(self.engineio_path):
             await self.engineio_server.handle_request(scope, receive, send)
         else:
             static_file = get_static_file(scope['path'], self.static_files) \

src/engineio/middleware.py

@@ -35,7 +35,11 @@ def __init__(self, engineio_app, wsgi_app=None, static_files=None,
                  engineio_path='engine.io'):
         self.engineio_app = engineio_app
         self.wsgi_app = wsgi_app
-        self.engineio_path = engineio_path.strip('/')
+        self.engineio_path = engineio_path
+        if not self.engineio_path.startswith('/'):
+            self.engineio_path = '/' + self.engineio_path
+        if not self.engineio_path.endswith('/'):
+            self.engineio_path += '/'
         self.static_files = static_files or {}
 
     def __call__(self, environ, start_response):
@@ -55,8 +59,7 @@ def get_socket(self):
 
             environ['eventlet.input'] = Input(environ['gunicorn.socket'])
         path = environ['PATH_INFO']
-        if path is not None and \
-                path.startswith('/{0}/'.format(self.engineio_path)):
+        if path is not None and path.startswith(self.engineio_path):
             return self.engineio_app.handle_request(environ, start_response)
         else:
             static_file = get_static_file(path, self.static_files) \

tests/asyncio/test_async_asgi.py

@@ -30,12 +30,12 @@ def test_create_app(self):
             'eio',
             'other_app',
             static_files='static_files',
-            engineio_path='/foo',
+            engineio_path='/foo/',
         )
         assert app.engineio_server == 'eio'
         assert app.other_asgi_app == 'other_app'
         assert app.static_files == 'static_files'
-        assert app.engineio_path == 'foo'
+        assert app.engineio_path == '/foo/'
 
     def test_engineio_routing(self):
         mock_server = mock.MagicMock()

tests/common/test_middleware.py

@@ -194,4 +194,4 @@ def test_legacy_middleware_class(self):
         assert m.engineio_app == 'eio'
         assert m.wsgi_app == 'wsgi'
         assert m.static_files == {}
-        assert m.engineio_path == 'eio_path'
+        assert m.engineio_path == '/eio_path/'