Upgrade websockets dependency. (#2154)

* Upgrade websockets dependency.

Fix #2142.

* Bumpt sanic-testing version

Co-authored-by: Adam Hopkins <adam@amhopkins.com>
Co-authored-by: Adam Hopkins <admhpkns@gmail.com>

sanic/websocket.py

@@ -14,9 +14,13 @@ from websockets import (  # type: ignore
     ConnectionClosed,
     InvalidHandshake,
     WebSocketCommonProtocol,
-    handshake,
 )
 
+# Despite the "legacy" namespace, the primary maintainer of websockets
+# committed to maintaining backwards-compatibility until 2026 and will
+# consider extending it if sanic continues depending on this module.
+from websockets.legacy import handshake
+
 from sanic.exceptions import InvalidUsage
 from sanic.server import HttpProtocol
 
@@ -126,7 +130,9 @@ class WebSocketProtocol(HttpProtocol):
             ping_interval=self.websocket_ping_interval,
             ping_timeout=self.websocket_ping_timeout,
         )
-        # Following two lines are required for websockets 8.x
+        # we use WebSocketCommonProtocol because we don't want the handshake
+        # logic from WebSocketServerProtocol; however, we must tell it that
+        # we're running on the server side
         self.websocket.is_client = False
         self.websocket.side = "server"
         self.websocket.subprotocol = subprotocol

setup.py

@@ -88,12 +88,12 @@ requirements = [
     uvloop,
     ujson,
     "aiofiles>=0.6.0",
-    "websockets>=8.1,<9.0",
+    "websockets>=9.0",
     "multidict>=5.0,<6.0",
 ]
 
 tests_require = [
-    "sanic-testing",
+    "sanic-testing>=0.6.0",
     "pytest==5.2.1",
     "multidict>=5.0,<6.0",
     "gunicorn==20.0.4",

tox.ini

@@ -7,7 +7,7 @@ setenv =
     {py37,py38,py39,pyNightly}-no-ext: SANIC_NO_UJSON=1
     {py37,py38,py39,pyNightly}-no-ext: SANIC_NO_UVLOOP=1
 deps =
-    sanic-testing
+    sanic-testing>=0.6.0
     coverage==5.3
     pytest==5.2.1
     pytest-cov
@@ -18,7 +18,7 @@ deps =
     beautifulsoup4
     gunicorn==20.0.4
     uvicorn
-    websockets>=8.1,<9.0
+    websockets>=9.0
 commands =
     pytest {posargs:tests --cov sanic}
     - coverage combine --append