bg(CORS): Add CORS to the project

- Install django-cors-headers
- Add it in installed apps

[Starts #166378524]

authors/cors.py

@@ -0,0 +1,4 @@
+class CorsMiddleware(object):
+    def process_response(self, req, resp):
+        response["Access-Control-Allow-Origin"] = "*"
+        return response

authors/settings.py

@@ -75,6 +75,7 @@
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'simple_history.middleware.HistoryRequestMiddleware',
+    'django.middleware.common.BrokenLinkEmailsMiddleware',
 ]
 
 ROOT_URLCONF = 'authors.urls'
@@ -216,7 +217,13 @@
 
 TWITTER_CONSUMER_KEY = os.getenv('TWITTER_CONSUMER_KEY')
 TWITTER_CONSUMER_SECRET = os.getenv('TWITTER_CONSUMER_SECRET')
+CORS_ORIGIN_ALLOW_ALL = True
 
+CORS_ORIGIN_WHITELIST = [
+    'http://localhost:3000',
+    'http://localhost:8000',
+    'http://localhost:8080',
+]
 #instantiate pusher with keys got from the .env file
 pusher = Pusher(
     app_id=os.getenv('APP_ID'),

requirements.txt

@@ -12,13 +12,17 @@ certifi==2019.3.9
 cffi==1.12.3
 channels==2.1.2
 chardet==3.0.4
+constantly==15.1.0
 coreapi==2.3.3
 coreschema==0.0.4
 coverage==4.5.3
 coveralls==1.7.0
+cryptography==2.7
+daphne==2.3.0
 defusedxml==0.6.0
 dj-database-url==0.5.0
 Django==2.1
+django-cors-headers==3.0.2
 django-cors-middleware==1.3.1
 django-extensions==2.1.6
 django-filter==2.1.0
@@ -38,13 +42,12 @@ google-auth==1.6.3
 gunicorn==19.9.0
 hyperlink==19.0.0
 idna==2.8
+incremental==17.5.0
 inflection==0.3.1
 itypes==1.1.0
 Jinja2==2.10.1
 linecache2==1.0.0
 MarkupSafe==1.1.1
-incremental==17.5.0
-linecache2==1.0.0
 mccabe==0.6.1
 more-itertools==7.0.0
 msgpack-python==0.5.6