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add section17 18 19
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‎section17/application/Pipfile‎

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[[source]]
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url = "https://pypi.python.org/simple"
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verify_ssl = true
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name = "pypi"
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[packages]
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flask = "*"
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flask-sqlalchemy = "*"
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[dev-packages]
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[requires]
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python_version = "3.6"

‎section17/application/Pipfile.lock‎

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‎section17/application/flask_blog/__init__.py‎

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from flask import Flask
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from flask_sqlalchemy import SQLAlchemy
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app = Flask(__name__)
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app.config.from_object('flask_blog.config')
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db = SQLAlchemy(app)
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import flask_blog.views

‎section17/application/flask_blog/config.py‎

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SQLALCHEMY_DATABASE_URI = 'sqlite:///flask_blog.db'
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SQLALCHEMY_TRACK_MODIFICATIONS = True
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DEBUG = True
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SECRET_KEY = 'secret key'
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USERNAME = 'john'
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PASSWORD = 'due123'

‎section17/application/flask_blog/templates/entries/index.html‎

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{% extends "layout.html" %}
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{% block body %}
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投稿がありません
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{% endblock %}

‎section17/application/flask_blog/templates/layout.html‎

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<!doctype html>
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<title>Flask Blog</title>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
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<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
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<div class="container">
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<nav class="navbar navbar-expand-lg navbar-light bg-light">
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<a class="navbar-brand" href="{{ url_for('show_entries') }}">Flask Blog</a>
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<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false"
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aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="collapse navbar-collapse" id="navbarNav">
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<ul class="nav navbar-nav navbar-right">
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{% if not session.logged_in %}
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<li class="nav-item">
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<a class="nav-link" href="{{ url_for('login') }}">ログイン</a>
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</li>
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{% else %}
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<li class="nav-item">
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<a class="nav-link" href="{{ url_for('logout') }}">ログアウト</a>
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</li>
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{% endif %}
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</ul>
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</div>
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</nav>
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{% for message in get_flashed_messages() %}
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<div class="alert alert-info" role="alert">
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{{ message }}
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</div>
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{% endfor %}
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<div class="blog-body">
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{% block body %}{% endblock %}
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</div>
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</div>

‎section17/application/flask_blog/templates/login.html‎

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{% extends "layout.html" %} {% block body %}
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<form action="{{ url_for('login') }}" method=post>
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<div class="form-group">
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<label for="InputTitle">ユーザ名</label>
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<input type="text" class="form-control" id="InputTitle" name=username>
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</div>
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<div class="form-group">
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<label for="InputPassword">パスワード</label>
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<input type="password" class="form-control" id="InputPassword" name=password>
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</div>
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<button type="submit" class="btn btn-primary">ログイン</button>
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</form>
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{% endblock %}

‎section17/application/flask_blog/views.py‎

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from flask import request, redirect, url_for, render_template, flash, session
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from flask_blog import app
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@app.route('/')
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def show_entries():
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if not session.get('logged_in'):
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return redirect(url_for('login'))
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return render_template('entries/index.html')
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@app.route('/login', methods=['GET', 'POST'])
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def login():
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error = None
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if request.method == 'POST':
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if request.form['username'] != app.config['USERNAME']:
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flash('ユーザ名が異なります')
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elif request.form['password'] != app.config['PASSWORD']:
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flash('パスワードが異なります')
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else:
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session['logged_in'] = True
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flash('ログインしました')
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return redirect(url_for('show_entries'))
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return render_template('login.html')
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@app.route('/logout')
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def logout():
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session.pop('logged_in', None)
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flash('ログアウトしました')
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return redirect(url_for('show_entries'))

‎section17/application/server.py‎

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from flask_blog import app
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if __name__ == '__main__':
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app.run()

‎section18/application/Pipfile‎

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[[source]]
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url = "https://pypi.python.org/simple"
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verify_ssl = true
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name = "pypi"
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[packages]
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flask = "*"
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flask-sqlalchemy = "*"
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[dev-packages]
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[requires]
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python_version = "3.6"

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