redirecting_flask_app.py

import os

from flask import (Flask, redirect, render_template, request,
                   send_from_directory, url_for)

app = Flask(__name__)


@app.route('/')
def index():
   print('Request for index page received')
   return render_template('index.html')

@app.route('/favicon.ico')
def favicon():
    return send_from_directory(os.path.join(app.root_path, 'static'),
                               'favicon.ico', mimetype='image/vnd.microsoft.icon')

###############################################
# positive case
@app.route('/redirect_a/api/v3', methods=['GET'])
def redirect_a_v3():
    print("redirect_a_v3")
    return redirect(url_for('redirect_a'))


@app.route('/redirect_a', methods=['GET'])
def redirect_a():
    print("redirect_a")
    return redirect(url_for('redirect_b'))

@app.route('/redirect_b', methods=['GET'])
def redirect_b():
    print("redirect_b")
    return redirect(url_for('redirect_c'))

@app.route('/redirect_c', methods=['GET'])
def redirect_c():
    print("redirect_c")
    return redirect(url_for('index'))
###############################################



###############################################
# infinite redirects
@app.route('/redirect_infi/api/v3', methods=['GET'])
def redirect_infi_api_v3():
    print("redirect_infi_api_v3")
    return redirect(url_for('redirect_infi_1'))

@app.route('/redirect_infi', methods=['GET'])
def redirect_infi_1():
    print("redirect_infi_1")
    return redirect(url_for('redirect_infi_2'))

@app.route('/redirect_infi_2', methods=['GET'])
def redirect_infi_2():
    print("redirect_infi_2")
    return redirect(url_for('redirect_infi_1'))
###############################################


###############################################
# redirect to internal IP
@app.route('/redirect_x/api/v3', methods=['GET'])
def redirect_x_api_v3():
    print("redirect_x_api_v3")
    return redirect(url_for('redirect_x'))

@app.route('/redirect_x', methods=['GET'])
def redirect_x():
    print("redirect_x")
    return redirect(url_for('redirect_z'))

@app.route('/redirect_z', methods=['GET'])
def redirect_z():
    print("redirect_z")
    return redirect(url_for('redirect_internal_ip'))

@app.route('/redirect_internal_ip', methods=['GET'])
def redirect_internal_ip():
    print("redirect_internal_ip")
    return redirect('http://127.0.0.1/internal/api')
################################################


###############################################
# redirect to internal IP 2
@app.route('/redirect_x2/api/v3', methods=['GET'])
def redirect_x2_api_v3():
    print("redirect_x2_api_v3")
    return redirect(url_for('redirect_x2'))

@app.route('/redirect_x2', methods=['GET'])
def redirect_x2():
    print("redirect_x2")
    return redirect(url_for('redirect_z2'))

@app.route('/redirect_z2', methods=['GET'])
def redirect_z2():
    print("redirect_z2")
    return redirect(url_for('redirect_internal_ip_2'))

@app.route('/redirect_internal_ip_2', methods=['GET'])
def redirect_internal_ip_2():
    print("redirect_internal_ip_2")
    return redirect('http://169.254.169.254')
################################################


@app.route('/hello', methods=['POST'])
def hello():
   name = request.form.get('name')

   if name:
       print('Request for hello page received with name=%s' % name)
       return render_template('hello.html', name = name)
   else:
       print('Request for hello page received with no name or blank name -- redirecting')
       return redirect(url_for('index'))


if __name__ == '__main__':
   app.run()