web.py

import urllib
import os
from flask import Flask, render_template

app = Flask(__name__)

@app.route("/<path:in_url>")
def index_with_url(in_url):
    url = urllib.unquote(in_url)
    if not url.startswith("https://") and not url.startswith("http://"):
        url = "http://" + url
    return render_template("index.html", source=url, text=in_url)

@app.route("/")
def index():
    return render_template("index.html",
                source="http://responsivewebdesign.com/robot/",
                text="http://responsivewebdesign.com/robot/")


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