added CORS for localhost

bigchaindb/web/server.py

@@ -2,11 +2,12 @@
 
 The application is implemented in Flask and runs using Gunicorn.
 """
-
+import os
 import copy
 import multiprocessing
 
 from flask import Flask
+from flask_cors import CORS
 import gunicorn.app.base
 
 from bigchaindb import utils
@@ -60,6 +61,30 @@ def create_app(*, debug=False, threads=4):
 
     app = Flask(__name__)
 
+    hostname = os.environ.get('DOCKER_MACHINE_IP', 'localhost')
+
+    if not hostname:
+        hostname = 'localhost'
+
+    origins = ('^(https?://)?(www\.)?({}|0|0.0.0.0|'
+               'localhost|127.0.0.1)(\.com)?:\d{{1,5}}$').format(hostname),
+    CORS(app,
+         origins=origins,
+         headers=(
+             'x-requested-with',
+             'content-type',
+             'accept',
+             'origin',
+             'authorization',
+             'x-csrftoken',
+             'withcredentials',
+             'cache-control',
+             'cookie',
+             'session-id',
+         ),
+         supports_credentials=True,
+         )
+
     app.debug = debug
 
     app.config['bigchain_pool'] = utils.pool(Bigchain, size=threads)

setup.py

@@ -70,6 +70,7 @@ install_requires = [
     'python-rapidjson==0.0.8',
     'logstats>=0.2.1',
     'flask>=0.10.1',
+    'flask-cors==2.1.2',
     'flask-restful~=0.3.0',
     'requests~=2.9',
     'gunicorn~=19.0',