[python/asyncio] fix passing proxy parameters to aiohttp (#5943)

modules/openapi-generator/src/main/resources/python/asyncio/rest.mustache

@@ -65,13 +65,10 @@ class RESTClientObject(object):
             ssl=ssl_context
         )
 
+        self.proxy = configuration.proxy
+        self.proxy_headers = configuration.proxy_headers
+
         # https pool manager
-        if configuration.proxy:
-            self.pool_manager = aiohttp.ClientSession(
-                connector=connector,
-                proxy=configuration.proxy
-            )
-        else:
         self.pool_manager = aiohttp.ClientSession(
             connector=connector
         )
@@ -122,6 +119,11 @@ class RESTClientObject(object):
             "headers": headers
         }
 
+        if self.proxy:
+            args["proxy"] = self.proxy
+        if self.proxy_headers:
+            args["proxy_headers"] = self.proxy_headers
+
         if query_params:
             args["url"] += '?' + urlencode(query_params)
 

samples/client/petstore/python-asyncio/petstore_api/rest.py

@@ -73,13 +73,10 @@ class RESTClientObject(object):
             ssl=ssl_context
         )
 
+        self.proxy = configuration.proxy
+        self.proxy_headers = configuration.proxy_headers
+
         # https pool manager
-        if configuration.proxy:
-            self.pool_manager = aiohttp.ClientSession(
-                connector=connector,
-                proxy=configuration.proxy
-            )
-        else:
         self.pool_manager = aiohttp.ClientSession(
             connector=connector
         )
@@ -130,6 +127,11 @@ class RESTClientObject(object):
             "headers": headers
         }
 
+        if self.proxy:
+            args["proxy"] = self.proxy
+        if self.proxy_headers:
+            args["proxy_headers"] = self.proxy_headers
+
         if query_params:
             args["url"] += '?' + urlencode(query_params)
 

samples/client/petstore/python-asyncio/tests/test_pet_api.py

@@ -192,6 +192,19 @@ class TestPetApiTests(unittest.TestCase):
         except ApiException as e:
             self.assertEqual(404, e.status)
 
+    @async_test
+    async def test_proxy(self):
+        config = Configuration()
+        # set not-existent proxy and catch an error to verify that
+        # the client library (aiohttp) tried to use it.
+        config.proxy = 'http://localhost:8080/proxy'
+        async with petstore_api.ApiClient(config) as client:
+            pet_api = petstore_api.PetApi(client)
+
+            with self.assertRaisesRegex(petstore_api.rest.aiohttp.client_exceptions.ClientProxyConnectionError,
+                                        'Cannot connect to host localhost:8080'):
+                await pet_api.get_pet_by_id(self.pet.id)
+
 
 if __name__ == '__main__':
     import logging