ehemalige Veranstaltungen ia3.netz + ia3.data sowie ia4.Netz im Studiengang Interaktive Medien
(c) 2020/2021 Hochschule Augsburg - Fakultät für Informatik - Prof.Dr.Nik Klever
%%writefile Aufgabe7/flaskr.py
# all the imports
import os
import sqlite3
from flask import Flask, request, session, g, redirect, url_for, abort, \
render_template, flash
app = Flask(__name__) # create the application instance :)
app.config.from_object(__name__) # load config from this file , flaskr.py
# Load default config and override config from an environment variable
app.config.update(dict(
DATABASE=os.path.join(app.root_path, 'flaskr.csv'),
SECRET_KEY='development key',
USERNAME='admin',
PASSWORD='default'
))
app.config.from_envvar('FLASKR_SETTINGS', silent=True)
def init_csv():
with open(app.config['DATABASE'],"r") as f:
alllines = f.read()
app.entries = [line.split(';') for line in alllines.split("\n")[1:-1]]
@app.route('/')
def show_entries():
entries = []
for e in app.entries:
entries.append(dict(title=e[1],text=e[2]))
return render_template('show_entries.html', entries=entries)
@app.route('/add', methods=['POST'])
def add_entry():
if not session.get('logged_in'):
abort(401)
#len(app.entries)+1,request.form['title'], request.form['text']
entry = [len(app.entries)+1,request.form['title'], request.form['text']]
app.entries.append(entry)
with open(app.config['DATABASE'],"a") as f:
f.write(str(entry[0])+";"+";".join(entry[1:]))
f.write("\n")
#f.write("{0};{1};{2}\n".format(*entry))
flash('New entry was successfully posted')
return redirect(url_for('show_entries'))
@app.route('/login', methods=['GET', 'POST'])
def login():
error = None
if request.method == 'POST':
if request.form['username'] != app.config['USERNAME']:
error = 'Invalid username'
elif request.form['password'] != app.config['PASSWORD']:
error = 'Invalid password'
else:
session['logged_in'] = True
flash('You were logged in')
return redirect(url_for('show_entries'))
return render_template('login.html', error=error)
@app.route('/logout')
def logout():
session.pop('logged_in', None)
flash('You were logged out')
return redirect(url_for('show_entries'))
if __name__ == "__main__":
init_csv()
app.run()
Overwriting Aufgabe7/flaskr.py
%%writefile Aufgabe7/templates/layout.html
<!doctype html>
<title>Flaskr</title>
<link rel=stylesheet type=text/css href="{{ url_for('static', filename='style.css') }}">
<div class=page>
<h1>Flaskr</h1>
<div class=metanav>
{% if not session.logged_in %}
<a href="{{ url_for('login') }}">log in</a>
{% else %}
<a href="{{ url_for('logout') }}">log out</a>
{% endif %}
</div>
{% for message in get_flashed_messages() %}
<div class=flash>{{ message }}</div>
{% endfor %}
{% block body %}{% endblock %}
</div>
Writing Aufgabe7/templates/layout.html
%%writefile Aufgabe7/templates/show_entries.html
{% extends "layout.html" %}
{% block body %}
{% if session.logged_in %}
<form action="{{ url_for('add_entry') }}" method=post class=add-entry>
<dl>
<dt>Title:
<dd><input type=text size=30 name=title>
<dt>Text:
<dd><textarea name=text rows=5 cols=40></textarea>
<dd><input type=submit value=Share>
</dl>
</form>
{% endif %}
<ul class=entries>
{% for entry in entries %}
<li><h2>{{ entry.title }}</h2>{{ entry.text|safe }}
{% else %}
<li><em>Unbelievable. No entries here so far</em>
{% endfor %}
</ul>
{% endblock %}
Writing Aufgabe7/templates/show_entries.html
%%writefile Aufgabe7/templates/login.html
{% extends "layout.html" %}
{% block body %}
<h2>Login</h2>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
<form action="{{ url_for('login') }}" method=post>
<dl>
<dt>Username:
<dd><input type=text name=username>
<dt>Password:
<dd><input type=password name=password>
<dd><input type=submit value=Login>
</dl>
</form>
{% endblock %}
Writing Aufgabe7/templates/login.html
%%writefile Aufgabe7/static/style.css
body { font-family: sans-serif; background: #eee; }
a, h1, h2 { color: #377ba8; }
h1, h2 { font-family: 'Georgia', serif; margin: 0; }
h1 { border-bottom: 2px solid #eee; }
h2 { font-size: 1.2em; }
.page { margin: 2em auto; width: 35em; border: 5px solid #ccc;
padding: 0.8em; background: white; }
.entries { list-style: none; margin: 0; padding: 0; }
.entries li { margin: 0.8em 1.2em; }
.entries li h2 { margin-left: -1em; }
.add-entry { font-size: 0.9em; border-bottom: 1px solid #ccc; }
.add-entry dl { font-weight: bold; }
.metanav { text-align: right; font-size: 0.8em; padding: 0.3em;
margin-bottom: 1em; background: #fafafa; }
.flash { background: #cee5F5; padding: 0.5em;
border: 1px solid #aacbe2; }
.error { background: #f0d6d6; padding: 0.5em; }
Writing Aufgabe7/static/style.css
%%writefile Aufgabe7/flaskr.csv
1;Titel;Text
Writing Aufgabe7/flaskr.csv
entry = [1,"Test","Text"]
str(entry[0])+";"+";".join(entry[1:])
'1;Test;Text'
%%writefile Aufgabe7/flaskr.py
# all the imports
import os
import sqlite3
from flask import Flask, request, session, g, redirect, url_for, abort, \
render_template, flash
app = Flask(__name__) # create the application instance :)
app.config.from_object(__name__) # load config from this file , flaskr.py
# Load default config and override config from an environment variable
app.config.update(dict(
DATABASE=os.path.join(app.root_path, 'flaskr.csv'),
SECRET_KEY='development key',
USERNAME='admin',
PASSWORD='default'
))
app.config.from_envvar('FLASKR_SETTINGS', silent=True)
@app.template_filter('crlf')
def crlf_filter(s):
rs = s.replace("_CRLF_","<br/>")
return rs
def crlf_encode(s):
return s.replace("\r\n","_CRLF_")
def init_csv():
with open(app.config['DATABASE'],"r") as f:
alllines = f.read()
app.entries = [line.split(';') for line in alllines.split("\n")[1:-1]]
@app.route('/')
def show_entries():
entries = []
for e in app.entries:
entries.append(dict(title=e[1],text=e[2]))
return render_template('show_entries.html', entries=entries)
@app.route('/add', methods=['POST'])
def add_entry():
if not session.get('logged_in'):
abort(401)
#len(app.entries)+1,request.form['title'], request.form['text']
entry = [len(app.entries)+1,request.form['title'], crlf_encode(request.form['text'])]
app.entries.append(entry)
with open(app.config['DATABASE'],"a") as f:
f.write("{0};{1};{2}\n".format(*entry))
flash('New entry was successfully posted')
return redirect(url_for('show_entries'))
@app.route('/login', methods=['GET', 'POST'])
def login():
error = None
if request.method == 'POST':
if request.form['username'] != app.config['USERNAME']:
error = 'Invalid username'
elif request.form['password'] != app.config['PASSWORD']:
error = 'Invalid password'
else:
session['logged_in'] = True
flash('You were logged in')
return redirect(url_for('show_entries'))
return render_template('login.html', error=error)
@app.route('/logout')
def logout():
session.pop('logged_in', None)
flash('You were logged out')
return redirect(url_for('show_entries'))
if __name__ == "__main__":
init_csv()
app.run()
Overwriting Aufgabe7/flaskr.py
%%writefile Aufgabe7/templates/show_entries.html
{% extends "layout.html" %}
{% block body %}
{% if session.logged_in %}
<form action="{{ url_for('add_entry') }}" method=post class=add-entry>
<dl>
<dt>Title:
<dd><input type=text size=30 name=title>
<dt>Text:
<dd><textarea name=text rows=5 cols=40></textarea>
<dd><input type=submit value=Share>
</dl>
</form>
{% endif %}
<ul class=entries>
{% for entry in entries %}
<li><h2>{{ entry.title }}</h2>{{ entry.text|crlf|safe }}
{% else %}
<li><em>Unbelievable. No entries here so far</em>
{% endfor %}
</ul>
{% endblock %}
Overwriting Aufgabe7/templates/show_entries.html
%%writefile flask_beispiel_5.py
from flask import request, Flask, render_template_string
login_template = """ <h2>Login</h2>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
<form action="{{ url_for('login') }}" method=post>
<dl>
<dt>Username:
<dd><input type=text name=username>
<dt>Password:
<dd><input type=password name=password>
<dd><input type=submit value=Login>
</dl>
</form>
"""
helloworld_template = """ <h2>Hello {{user}}</h2>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
"""
def valid_login(user,passwd):
if user.startswith('a'): return True
else: return False
def log_the_user_in(user):
return render_template_string(helloworld_template, user=user)
app = Flask(__name__)
app.debug = True
@app.route('/login', methods=['POST', 'GET'])
def login():
error = None
if request.method == 'POST':
if valid_login(request.form['username'],
request.form['password']):
return log_the_user_in(request.form['username'])
else:
error = 'Invalid username/password'
# the code below is executed if the request method
# was GET or the credentials were invalid
return render_template_string(login_template, error=error)
if __name__ == "__main__":
app.run()
Writing flask_beispiel_5.py
%%writefile flask_beispiel_6.py
from flask import request, Flask, render_template_string
login_template = """ <h2>Login</h2>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
<form action="{{ url_for('loginform') }}" method=get>
<dl>
<dt>Username:
<dd><input type=text name=username>
<dt>Password:
<dd><input type=password name=password>
<dd><input type=submit value=Login>
</dl>
</form>
"""
helloworld_template = """ <h2>Hello {{user}}</h2>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
"""
def valid_login(user,passwd):
if user.startswith('a'): return True
else: return False
def log_the_user_in(user):
return render_template_string(helloworld_template, user=user)
app = Flask(__name__)
app.debug = True
@app.route('/loginform', methods=['GET'])
def loginform():
if valid_login(request.args['username'],
request.args['password']):
return log_the_user_in(request.args['username'])
else:
error = 'Invalid username/password'
return render_template_string(login_template, error=error)
@app.route('/login', methods=['GET'])
def login():
error = None
return render_template_string(login_template, error=error)
if __name__ == "__main__":
app.run()
Overwriting flask_beispiel_6.py
%%writefile flask_beispiel_7.py
from flask import request, Flask, render_template_string
login_template = """ <h2>Login</h2>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
<form action="{{ url_for('loginform') }}" method=get>
<dl>
<dt>Username:
<dd><input type=text name=username>
<dt>Password:
<dd><input type=password name=password>
<dd><input type=submit value=Login>
</dl>
</form>
"""
helloworld_template = """ <h2>Hello {{user}}</h2>
<ul>
{% for i in environ %}
<li>{{ i }}: {{ environ[i] }}</li>
{% endfor %}
</ul>
{% if error %}<p class=error><strong>Error:</strong> {{ error }}{% endif %}
"""
def valid_login(user,passwd):
if user.startswith('a'): return True
else: return False
def log_the_user_in(user):
return render_template_string(helloworld_template, user=user, environ=request.environ)
app = Flask(__name__)
app.debug = True
@app.route('/loginform', methods=['GET'])
def loginform():
if valid_login(request.args['username'],
request.args['password']):
return log_the_user_in(request.args['username'])
else:
error = 'Invalid username/password'
return render_template_string(login_template, error=error)
@app.route('/login', methods=['GET'])
def login():
error = None
return render_template_string(login_template, error=error)
if __name__ == "__main__":
app.run()
Overwriting flask_beispiel_7.py
%%writefile flask_beispiel_8.py
from flask import Flask, session, redirect, url_for, escape, request
app = Flask(__name__)
app.debug = True
@app.route('/')
def index():
if 'username' in session:
return 'Logged in as %s' % escape(session['username'])
return 'You are not logged in'
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
session['username'] = request.form['username']
return redirect(url_for('index'))
return '''
<form action="" method="post">
<p><input type=text name=username>
<p><input type=submit value=Login>
</form>
'''
@app.route('/logout')
def logout():
# remove the username from the session if it's there
session.pop('username', None)
return redirect(url_for('index'))
# set the secret key. keep this really secret:
app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
if __name__ == "__main__":
app.run()
Writing flask_beispiel_8.py
%%writefile templates/PTFBestellformular.html
<html>
<head>
<title>PTF Bestellformular</title>
</head>
<body>
<h1>PTF Bestellformular</h1>
<form ACTION="/PTFBestellformular" method="GET">
<h3>Kunde</h3>
<p>Name <input name="Kunde" size="46"/></p>
<p>Strasse <input name="Strasse" size="40"/></p>
<p>Ort <input name="Ort" size="20"> Plz <input name="Plz" size="4"></p>
<h3>Kreditkarte</h3>
<p>Mastercard
<input name="Kreditkarte" type="radio" value="Mastercard"/>
Visacard
<input name="Kreditkarte" type="radio" value="Visacard"/>
</p>
<p>Nummer
<input name="Kreditkartennummer" size="10"/>
Ablaufdatum
<input name="Ablaufdatum" size="4"/>
</p>
<h3>PTF Bestellgröße</h3>
<p>Groß
<input name="Groesse" type="radio" value="gross"/>
Mittel
<input name="Groesse" type="radio" value="mittel"/>
Klein
<input name="Groesse" type="radio" value="klein"/>
</p>
<h3>Zustellung</h3>
<p>Expresszustellung <input name="Express" type="checkbox"/></p>
<p><input type="submit" value="Bestellung abschicken"/></p>
</form>
<p>Vielen Dank für ihre Bestellung!</p>
</body>
</html>
Writing templates/PTFBestellformular.html
%%writefile flask_beispiel_9.py
from flask import Flask, session, redirect, url_for, escape, request, render_template
app = Flask(__name__)
app.debug = True
@app.route('/')
def index():
return render_template("PTFBestellformular.html")
@app.route('/PTFBestellformular', methods=['GET'])
def login():
return '''<!doctype html
<html>
<head>
<title>PTF Bestellung</title>
</head>
<body>
<h2>PTF Bestellung</h2>
{}
</body>
</html>
'''.format(request.args)
if __name__ == "__main__":
app.run()
Overwriting flask_beispiel_9.py
%%writefile flask_beispiel_10.py
from flask import Flask, session, redirect, url_for, escape, request, render_template
app = Flask(__name__)
app.debug = True
@app.route('/')
def index():
return render_template("PTFBestellformular.html")
@app.route('/PTFBestellformular', methods=['GET'])
def login():
return render_template("PTFBestellung.html",bestellung=request.args)
if __name__ == "__main__":
app.run()
Writing flask_beispiel_10.py
%%writefile templates/PTFBestellung.html
<!doctype html>
<html>
<head>
<title>PTF Bestellung</title>
</head>
<body>
<h2>PTF Bestellung</h2>
<ul>
{% for entry in bestellung %}
<li>{{ entry }}: {{ bestellung[entry] }}</li>
{% endfor %}
</ul>
</body>
</html>
Writing templates/PTFBestellung.html