gistfile1.py

import os, urllib2
from flask import Flask, request
app = Flask(__name__)

@app.route("/")
def echo():
    data = urllib2.unquote(request.query_string)
    if ' ' not in data:
        return data.replace('+', ' ')
    else:
        return data

if __name__ == "__main__":
    port = int(os.environ.get('PORT', 5000))
    app.run(host='0.0.0.0', port=port)