examples/ch4/app.py

import os
import uuid

from flask import Flask, render_template, flash, redirect, url_for, request
from wtforms import ValidationError

from forms import LoginForm, FortyTwoForm

app = Flask(__name__)
app.secret_key = os.getenv('SECRET_KEY', 'secret string')


@app.route('/', methods=['GET', 'POST'])
def index():
    return render_template('index.html')


@app.route('/html', methods=['GET', 'POST'])
def html():
    form = LoginForm()
    if request.method == 'POST':
        username = request.form.get('username')
        flash(f'Welcome home, {username}!')
        return redirect(url_for('index'))
    return render_template('pure_html.html')


@app.route('/basic', methods=['GET', 'POST'])
def basic():
    form = LoginForm()
    if form.validate_on_submit():
        username = form.username.data
        flash(f'Welcome home, {username}!')
        return redirect(url_for('index'))
    return render_template('basic.html', form=form)


@app.route('/bootstrap', methods=['GET', 'POST'])
def bootstrap():
    form = LoginForm()
    if form.validate_on_submit():
        username = form.username.data
        flash(f'Welcome home, {username}!')
        return redirect(url_for('index'))
    return render_template('bootstrap.html', form=form)


@app.route('/custom-validator', methods=['GET', 'POST'])
def custom_validator():
    form = FortyTwoForm()
    if form.validate_on_submit():
        flash('Bingo!')
        return redirect(url_for('index'))
    return render_template('custom_validator.html', form=form)