ariarijp/app.py

## app.py
import os
from flask import Flask, flash, redirect, render_template, request, session, abort, url_for

app = Flask(__name__)
app.secret_key = 'VERY_VERY_SECRET'
app.config['SESSION_TYPE'] = 'filesystem'


@app.route('/')
def home():
    return render_template('login.html')


@app.route('/login', methods=['POST'])
def do_admin_login():
    if request.form['password'] == 'p@ssw0rd' and request.form['username'] == 'admin':
        session['logged_in'] = True
    else:
        flash('Wrong password!')
    return home()


@app.route('/logout')
def do_admin_logout():
    session.pop('logged_in', None)
    return redirect(url_for('home'))


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

## login.html
<!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
</head>
<body>
    <div class="container">
        <h1>Flask Login Example</h1>
        {% block body %}
            {% with messages = get_flashed_messages() %}
                {% if messages %}
                <div class="alert alert-info">
                    {% for message in messages %}
                    <p>{{ message }}</p>
                    {% endfor %}
                </div>
                {% endif %}
            {% endwith %}
            {% if session['logged_in'] %}
            <div>
                <p>ログイン中です！</p>
                <a class="btn btn-primary btn-block" href="/logout">ログアウト</a>
            </div>
            {% else %}
            <form action="/login" method="POST">
                <div class="form-group">
                    <input type="username" class="form-control" name="username" placeholder="ユーザー名(admin)">
                </div>
                <div class="form-group">
                    <input type="password" class="form-control" name="password" placeholder="パスワード(p@ssw0rd)">
                </div>
                <div class="form-group">
                    <input type="submit" class="form-control btn btn-primary" value="ログイン">
                </div>
            </form>
            {% endif %}
        {% endblock %}
    </div>
    <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</body>
</html>

## requirements.txt
appdirs==1.4.0
click==6.7
Flask==0.12
itsdangerous==0.24
Jinja2==2.9.5
MarkupSafe==0.23
packaging==16.8
pyparsing==2.1.10
six==1.10.0
Werkzeug==0.11.15
	import os
	from flask import Flask, flash, redirect, render_template, request, session, abort, url_for

	app = Flask(__name__)
	app.secret_key = 'VERY_VERY_SECRET'
	app.config['SESSION_TYPE'] = 'filesystem'


	@app.route('/')
	def home():
	return render_template('login.html')


	@app.route('/login', methods=['POST'])
	def do_admin_login():
	if request.form['password'] == 'p@ssw0rd' and request.form['username'] == 'admin':
	session['logged_in'] = True
	else:
	flash('Wrong password!')
	return home()


	@app.route('/logout')
	def do_admin_logout():
	session.pop('logged_in', None)
	return redirect(url_for('home'))


	if __name__ == "__main__":
	app.run()
	<!DOCTYPE html>
	<html lang="ja">
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
	</head>
	<body>
	<div class="container">
	<h1>Flask Login Example</h1>
	{% block body %}
	{% with messages = get_flashed_messages() %}
	{% if messages %}
	<div class="alert alert-info">
	{% for message in messages %}
	<p>{{ message }}</p>
	{% endfor %}
	</div>
	{% endif %}
	{% endwith %}
	{% if session['logged_in'] %}
	<div>
	<p>ログイン中です！</p>
	<a class="btn btn-primary btn-block" href="/logout">ログアウト</a>
	</div>
	{% else %}
	<form action="/login" method="POST">
	<div class="form-group">
	<input type="username" class="form-control" name="username" placeholder="ユーザー名(admin)">
	</div>
	<div class="form-group">
	<input type="password" class="form-control" name="password" placeholder="パスワード(p@ssw0rd)">
	</div>
	<div class="form-group">
	<input type="submit" class="form-control btn btn-primary" value="ログイン">
	</div>
	</form>
	{% endif %}
	{% endblock %}
	</div>
	<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
	</body>
	</html>
	appdirs==1.4.0
	click==6.7
	Flask==0.12
	itsdangerous==0.24
	Jinja2==2.9.5
	MarkupSafe==0.23
	packaging==16.8
	pyparsing==2.1.10
	six==1.10.0
	Werkzeug==0.11.15