Message server

Using Flask:

message_server.py

from flask import *
app = Flask(__name__)
app.secret_key = "qwertyuiop"
import hashlib
password = '5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8' # Unsalted SHA256 hash for 'password'

# Fake LAN IP addresses, replace with real IP addresses once known:
messages = {
    '192.168.0.1':['Your books are overdue at the library.','Netball practise this afternoon at 3pm.'],
    '192.168.0.2':['Sushi is $3 at the tuckshop today.','Music class is in the library today.'],
    '192.168.0.3':['Check out the new video on Youtube.',],
}

@app.route("/")
def root():
  return render_template("mail.html",
    content = messages.get(request.remote_addr),
    session = session
  )

@app.route("/login", methods=["post"])
def login():
  plain_text = request.form["password"]
  hash_text = hashlib.sha256( plain_text.encode('utf-8') ).hexdigest()
  if hash_text == password:
    session['authenticated'] = True
  return redirect("/")

# Remember to edit host IP to your local IP:
app.run(debug=True, host="127.0.0.1", port=5000)

templates\mail.html

{% if 'authenticated' not in session %}
  <form method="post" action="/login">
    enter password:
    <input type="text" name="password">
    <input type="submit" value="login">
  </form>
{% else %}
  {% if content %}
    {% for msg in content %}
      {{msg}}
      <hr>
    {% endfor %}
  {% else %}
    <i>no messages for you!</i>
  {% endif %}
{% endif %}