Solves #17 when running with ENABLE_CORS=1 env variable

* Uses [Flask-Cors](https://flask-cors.readthedocs.io/en/latest/)
* Adds default config `ENABLE_CORS = False` + env var
* Adds default config `CORS_ORIGINS = "*"` + env var

:v:

requestbin/__init__.py

@@ -1,8 +1,11 @@
-from flask import Flask, redirect, url_for
-import config, os
-
+import config
+import os
 from cStringIO import StringIO
 
+from flask import Flask
+from flask_cors import CORS
+
+
 class WSGIRawBody(object):
     def __init__(self, application):
         self.application = application
@@ -33,6 +36,9 @@ def callback(status, headers, exc_info=None):
 
 app = Flask(__name__)
 
+if os.environ.get('ENABLE_CORS', config.ENABLE_CORS):
+    cors = CORS(app, resources={r"*": {"origins": os.environ.get('CORS_ORIGINS', config.CORS_ORIGINS)}})
+
 from werkzeug.contrib.fixers import ProxyFix
 app.wsgi_app = WSGIRawBody(ProxyFix(app.wsgi_app))
 

requestbin/config.py

@@ -6,6 +6,9 @@
 
 PORT_NUMBER = 4000
 
+ENABLE_CORS = False
+CORS_ORIGINS = "*"
+
 FLASK_SESSION_SECRET_KEY = os.environ.get("SESSION_SECRET_KEY", "N1BKhJLnBqLpexOZdklsfDKFJDKFadsfs9a3r324YB7B73AglRmrHMDQ9RhXz35")
 
 BIN_TTL = 48*3600

requirements.txt

@@ -7,9 +7,10 @@ feedparser==5.1.3
 Jinja2==2.7
 Werkzeug==0.9.3
 Flask==0.10.1
+Flask-Cors==3.0.2
 redis==2.7.6
 msgpack-python==0.1.12
 python-dateutil==2.1
 gunicorn
 bugsnag
-blinker
+blinker