Cors preflight support (#139)

* add cors preflight support for options method

* add tests for cors preflight feature

* fix flake8 for test_pass_preflight_options_request

Author: ckkz-it

aiohttp_jwt/middleware.py

@@ -3,7 +3,7 @@
 from functools import partial
 
 import jwt
-from aiohttp import web
+from aiohttp import web, hdrs
 
 from .utils import check_request, invoke
 
@@ -39,6 +39,9 @@ def JWTMiddleware(
 
     @web.middleware
     async def jwt_middleware(request, handler):
+        if request.method == hdrs.METH_OPTIONS:
+            return await handler(request)
+
         if check_request(request, whitelist):
             return await handler(request)
 

tests/test_middleware.py

@@ -244,3 +244,21 @@ async def handler(request):
             token.decode('utf-8')),
     })
     assert response.status == resp_status
+
+
+async def test_pass_preflight_options_request(
+        create_app, aiohttp_client, fake_payload, token):
+    async def handler(request):
+        return web.json_response({})
+
+    views = (('/foo', handler),)
+    client = await aiohttp_client(
+        create_app(views=views),
+    )
+    response = await client.options('/foo')
+    assert response.status == 200
+
+    response = await client.options('/foo', headers={
+        'Authorization': 'Bearer {}'.format(token.decode('utf-8')),
+    })
+    assert response.status == 200