bugfix: fix incompatible api between multidict and websockets, and bump up websockets version to match uvicorn

sanic/compat.py

@@ -0,0 +1,7 @@
+from multidict import CIMultiDict
+
+
+class Header(CIMultiDict):
+
+	def get_all(self, key):
+		return self.getall(key, [])

sanic/server.py

@@ -12,8 +12,8 @@ from time import time
 
 from httptools import HttpRequestParser
 from httptools.parser.errors import HttpParserError
-from multidict import CIMultiDict
 
+from sanic.compat import Header
 from sanic.exceptions import (
     HeaderExpectationFailed,
     InvalidUsage,
@@ -304,7 +304,7 @@ class HttpProtocol(asyncio.Protocol):
     def on_headers_complete(self):
         self.request = self.request_class(
             url_bytes=self.url,
-            headers=CIMultiDict(self.headers),
+            headers=Header(self.headers),
             version=self.parser.get_http_version(),
             method=self.parser.get_method().decode(),
             transport=self.transport,

setup.py

@@ -80,7 +80,7 @@ requirements = [
     uvloop,
     ujson,
     "aiofiles>=0.3.0",
-    "websockets>=6.0,<7.0",
+    "websockets>=7.0,<8.0",
     "multidict>=4.0,<5.0",
     "requests-async==0.5.0",
 ]

tox.ini

@@ -19,7 +19,7 @@ deps =
     gunicorn
     pytest-benchmark
     uvicorn
-    websockets>=6.0,<7.0
+    websockets>=7.0,<8.0
 commands =
     pytest {posargs:tests --cov sanic}
     - coverage combine --append