app.py

from flask import Flask, render_template, request, session, redirect, jsonify
import pickle

app = Flask(__name__)
app.secret_key = b'random string...'

member_data = {}
message_data = []
member_data_file = 'member_data.dat'
message_data_file = 'message_data.dat'

# load member_data from file
try:
  with open(member_data_file, 'rb') as f:
    list = pickle.load(f)
    if list != None:
      member_data = list
except:
  pass

# load message_data from file
try:
  with open(message_data_file, 'rb') as f:
    list = pickle.load(f)
    if list != None:
      message_data = list
except:
  pass

# access top page 
@app.route('/', methods=['GET'])
def index():
  global message_data
  return render_template('messages.html', \
    login=False, \
    title='MeetingTranscriptionWeb', \
    message='Not logged in...',
    data = message_data)

# post message
@app.route('/post', methods=['POST'])
def postMsg():
  global message_data
  id = request.form.get('id')
  msg = request.form.get('comment')
  date = request.form.get('date')
  message_data.append((id, msg, date))
  # if len(message_data) > 25:
    # message_data.pop(0)
  try:
    with open(message_data_file, 'wb') as f:
      pickle.dump(message_data, f)
  except:
    pass
  return 'True'

# get messages
@app.route('/messages', methods=['POST'])
def getMsg():
  global message_data
  return jsonify(message_data)

@app.route('/summary', methods=['GET'])
def getSummary():
  return '準備中です'

# login form sent  
@app.route('/login', methods=['POST'])
def login_post():
  global member_data, message_data
  id = request.form.get('id')
  pswd = request.form.get('pass')
  if id in member_data:
    if pswd == member_data[id]:
      flg = 'True'
    else:
      flg = 'False'
  else:
    member_data[id] = pswd
    flg = 'True'
    try:
      with open(member_data_file, 'wb') as f:
        pickle.dump(member_data, f)
    except:
      pass
  return flg

if __name__ == '__main__':
  app.debug = True
  app.templates_auto_reload = True
  app.run(host='localhost', port='8080')