lab-12/username.py

+from flask import Flask
+import datetime
+
+app = Flask(__name__)
+
+@app.route('/')
+def hello_world():
+    return 'Hello, World!'
+
+@app.route('/<username>')
+def show_user_profile(username):
+    # show the user profile for that user
+    return '<center><h1>  hello, %s  </h1></center>' % username
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-12/vs_url_for.py

+from flask import url_for
+
+URL_PREFIX = '/usr/253'
+
+def vs_url_for(view):
+    url = url_for(view)
+    url = URL_PREFIX + url
+    return url
+
+

lab-12/whats_my_name.py

+print 'whats_my_name = {}'.format(__name__)
+

lab-13/.gitignore

+static/uploads/*
+*.pyc
+

lab-13/dw_headlines.py

+from flask import Flask
+from flask import make_response
+from flask import render_template
+from flask import request
+import feedparser
+import json
+import urllib
+import urllib2
+import datetime
+
+app = Flask(__name__)
+
+RSS_FEEDS = { 'bbc': 'http://feeds.bbci.co.uk/news/rss.xml',
+              'cnn': 'http://rss.cnn.com/rss/edition.rss'}
+
+DEFAULTS = {'publication':'bbc', 
+            'city':'London, UK',
+            'currency_from' : 'GBP',
+            'currency_to' : 'USD'}
+
+WEATHER_URL = 'http://api.openweathermap.org/data/2.5/' \
+              'weather?q={}&units=metric&appid=9504c0c840ef1f147f111a088b290341'
+CURRENCY_URL = 'https://openexchangerates.org//api/latest.json?' \
+               'app_id=3435756597b94d05aab8e63e46551e30'
+
+def get_news(query):
+    if not query or query.lower() not in RSS_FEEDS:
+        publication = "bbc"
+    else:
+        publication = query.lower()
+    feed = feedparser.parse(RSS_FEEDS[publication])
+    return feed['entries']
+
+def get_weather(query):
+    query = urllib.quote(query)
+    url = WEATHER_URL.format(query)
+    data = urllib2.urlopen(url).read()
+    parsed = json.loads(data)
+    weather = None
+    if parsed.get("weather"):
+        weather = {"description":
+        parsed["weather"][0]["description"],
+        "temperature":parsed["main"]["temp"],
+        "city":parsed["name"],
+        'country': parsed['sys']['country']
+        }
+    return weather
+
+def get_rate(frm, to):
+    all_currency = urllib2.urlopen(CURRENCY_URL).read()
+    parsed = json.loads(all_currency).get('rates')
+    frm_rate = parsed.get(frm.upper())
+    to_rate = parsed.get(to.upper())
+    return (to_rate/frm_rate, parsed.keys()) 
+
+def get_values_with_fallback(key):
+	if request.args.get(key):
+		return request.args.get(key)
+	if request.cookies.get(key):
+		return request.cookies.get(key)
+
+
+@app.route("/")
+def home():
+
+    # get customized headlines, based on user input or default
+    publication = get_values_with_fallback('publication')
+    articles = get_news(publication)
+
+    # get customized weather based on user input or default
+    city = get_values_with_fallback('city')
+    weather = get_weather(city)
+
+    # get customized currency based on user input or default
+    currency_from = get_values_with_fallback("currency_from")
+    currency_to = get_values_with_fallback("currency_to")
+    rate, currencies = get_rate(currency_from, currency_to)
+    
+    response = make_response(render_template("home.html",
+        articles=articles,
+        weather=weather,
+        currency_from=currency_from,
+        currency_to=currency_to,
+        rate=rate,
+        currencies=sorted(currencies)))
+    expires = datetime.datetime.now() + datetime.timedelta(days=365)
+    response.set_cookie("publication", publication, expires=expires)
+    response.set_cookie("city", city, expires=expires)
+    response.set_cookie("currency_from",
+        currency_from, expires=expires)
+    response.set_cookie("currency_to", currency_to, expires=expires)
+    return response
+
+
+if __name__ == '__main__':
+    app.run(port=5000, debug=True)
+
+

lab-13/file_upload.py

+from flask import Flask
+from flask import render_template, session, request
+from flask import redirect, url_for, flash
+from flask import send_from_directory
+import os
+from vs_url_for import vs_url_for
+from werkzeug.utils import secure_filename
+
+ALLOWED_EXTENSIONS = set(['png', 'jpg', 'jpeg', 'gif'])
+UPLOAD_FOLDER = 'static/uploads'
+
+app = Flask(__name__)
+
+app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
+
+# defining allowed file types for file upload
+def allowed_file(filename):
+    return '.' in filename and \
+        filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
+
+@app.route('/')
+def index():
+    files = [os.path.join(UPLOAD_FOLDER,f) for f in os.listdir(UPLOAD_FOLDER)]
+    return render_template('upload_index.html', files=files)
+
+
+@app.route('/upload', methods = ['GET','POST'])
+def upload_image():
+    if request.method == 'POST':
+        if 'file' not in request.files:
+            flash('no file part')
+            return redirect(request.url)
+        file = request.files['file']
+        if file.filename=='':
+            flash('no selected file')
+            return redirect(request.url)
+        if not allowed_file(file.filename):
+            flash('file type not allowed')
+            return redirect(request.url)
+        if file and allowed_file(file.filename):
+            filename = secure_filename(file.filename)
+            file.save(os.path.join(UPLOAD_FOLDER,filename))
+            flash('File "{}" successfully uploaded'.format(filename))
+            return redirect(vs_url_for('index'))
+    return render_template('file_upload.html')    
+
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/file_upload_wtforms.py

+from flask import Flask
+from flask import render_template, session, request
+from flask import redirect, url_for, flash
+from flask import send_from_directory
+import os
+from werkzeug.utils import secure_filename
+from vs_url_for import vs_url_for
+from flask_wtf import FlaskForm
+from flask_wtf.file import FileField, FileAllowed, FileRequired
+from wtforms import SubmitField
+from wtforms import validators
+
+ALLOWED_EXTENSIONS = set(['png', 'jpg', 'jpeg', 'gif'])
+UPLOAD_FOLDER = 'static/uploads'
+
+class UploadForm(FlaskForm):
+    file = FileField('image', validators=[
+        FileRequired(),
+        FileAllowed(['jpg','png'], 'Images only!')])
+    submit = SubmitField('submit', [validators.DataRequired()])
+
+app = Flask(__name__)
+
+app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
+
+@app.route('/')
+def index():
+    files = [os.path.join(UPLOAD_FOLDER,f) for f in os.listdir(UPLOAD_FOLDER)]
+    return render_template('upload_index.html', files=files)
+
+
+@app.route('/upload', methods = ['GET','POST'])
+def upload_image():
+    form = UploadForm()
+    if form.validate_on_submit():
+        upload = form.file.data
+        filename = secure_filename(upload.filename)
+        upload.save(os.path.join(UPLOAD_FOLDER,filename))
+        flash('File "{}" successfully uploaded'.format(filename))
+        return redirect(vs_url_for('index'))
+    return render_template('file_upload_wtforms.html',form=form)    
+
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/get_headlines.py

+from flask import Flask, render_template
+from flask import request
+import feedparser
+
+app = Flask(__name__)
+
+RSS_FEEDS = { 'bbc': 'http://feeds.bbci.co.uk/news/rss.xml',
+              'aljazeera' : 'https://www.aljazeera.com/xml/rss/all.xml',
+              'ap':\
+              'http://hosted2.ap.org/atom/APDEFAULT/cae69a7523db45408eeb2b3a98c0c9c5'}
+
+
+@app.route("/")
+def headlines():
+    publication =''
+    if request.args.get('publication'):
+        publication = request.args.get('publication')
+    if not publication or publication.lower() not in RSS_FEEDS:
+        publication = "bbc"
+    else:
+        publication = publication.lower()
+    feed = feedparser.parse(RSS_FEEDS[publication])
+    articles = feed['entries']
+    return render_template('get_headlines.html',articles=articles)
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/get_headlines_key_error.py

+from flask import Flask, render_template
+from flask import request
+import feedparser
+
+app = Flask(__name__)
+
+RSS_FEEDS = { 'bbc': 'http://feeds.bbci.co.uk/news/rss.xml',
+              'aljazeera' : 'https://www.aljazeera.com/xml/rss/all.xml',
+              'ap':\
+              'http://hosted2.ap.org/atom/APDEFAULT/cae69a7523db45408eeb2b3a98c0c9c5'}
+
+
+@app.route("/")
+def headlines():
+    publication = request.args['publication']
+    if not publication or publication.lower() not in RSS_FEEDS:
+        publication = "bbc"
+    else:
+        publication = publication.lower()
+    feed = feedparser.parse(RSS_FEEDS[publication])
+    articles = feed['entries']
+    return render_template('get_headlines.html',articles=articles)
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/mock_login.py

+from flask import Flask, render_template
+from flask import request, flash
+import string
+
+app = Flask(__name__)
+
+USERNAME, PASSWORD = 'alan', '4l4n'
+app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
+
+def sanitise_string(userinput):
+    return ''.join(e for e in userinput if e.isalnum())
+    # https://docs.python.org/3.5/library/stdtypes.html
+
+@app.route("/", methods = ['GET','POST'])
+def show_user():
+    username, password ='',''
+    if request.method == 'POST':
+        username = request.form['username']
+        password = request.form['password']
+        
+        username = sanitise_string(username)
+        password = sanitise_string(password)
+        
+        if username == USERNAME and password == PASSWORD:
+           flash('login successful!') 
+    list = [username, password]
+    return render_template('mock_login.html', list=list)
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/mock_login_get_only.py

+from flask import Flask, render_template
+from flask import request, flash
+import string
+
+app = Flask(__name__)
+
+USERNAME, PASSWORD = 'alan', '4l4n'
+app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
+
+def sanitise_string(userinput):
+    return ''.join(e for e in userinput if e.isalnum())
+    # https://docs.python.org/3.5/library/stdtypes.html
+
+@app.route("/")
+def show_user():
+    username, password ='',''
+    if request.method == 'POST':
+        username = request.form['username']
+        password = request.form['password']
+        
+        username = sanitise_string(username)
+        password = sanitise_string(password)
+        
+        if username == USERNAME and password == PASSWORD:
+           flash('login successful!') 
+    list = [username, password]
+    return render_template('mock_login.html', list=list)
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/mock_login_wtforms.py

+from flask import Flask, render_template
+from flask import request, flash
+import string
+from flask_wtf import Form
+from wtforms import PasswordField
+from wtforms import StringField
+from wtforms import SubmitField
+from wtforms import validators
+
+class LoginForm(Form):
+    username = StringField('username', validators = [validators.DataRequired()])
+    password = PasswordField('password', validators =[validators.DataRequired(), validators.length(min=8)])
+    password2 = PasswordField('password2', validators=[validators.DataRequired(),
+        validators.EqualTo('password', message='Passwords must match')])
+    submit = SubmitField('submit', [validators.DataRequired()])
+
+
+app = Flask(__name__)
+
+USERNAME, PASSWORD = 'alan', '4l4n4l4n'
+app.secret_key = 'A0Zr98j/3yX R~XHH!jmN]LWX/,?RT'
+
+def sanitise_string(userinput):
+    return ''.join(e for e in userinput if e.isalnum())
+    # https://docs.python.org/3.5/library/stdtypes.html
+
+@app.route('/', methods = ['GET', 'POST'])
+def login():
+    username, password ='',''
+    form = LoginForm()
+    if form.validate_on_submit():
+        password = form.password.data
+        username = form.username.data
+        if username == USERNAME and password == PASSWORD:
+           flash('login successful!') 
+    list = [username, password]
+    return render_template('mock_login_wtforms.html', form=form, list=list)
+
+
+
+
+if __name__ == '__main__':
+    app.run(debug=True,host='0.0.0.0',port=8000)

lab-13/templates/base.html

+<!DOCTYPE html>
+<head>
+
+<meta charset="utf-8">
+
+
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+
+ <!-- Latest compiled and minified CSS -->
+ <link rel="stylesheet"
+ href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
+
+ <!-- jQuery library -->
+ <script
+ src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
+
+ <!-- Latest compiled JavaScript -->
+ <script
+ src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> 
+
+    <style>
+    img {
+        height: 200px;
+        }
+    </style>
+
+</head>
+<body>
+<div class="container">
+
+    {% for category, message in get_flashed_messages(with_categories=true) %}
+    <div class="alert alert-dismissable alert-warning alert-{{ category }}">
+    <button type="button" class="close" data-dismiss="alert">&times;</button>
+    {{ message }}
+    </div>
+    {% endfor %}
+
+    <div class="jumbotron">
+
+        {% block body %}{% endblock %}
+    </div>
+</div>
+</body>
+</html>

lab-13/templates/dw_home.html

+<html>
+<head>
+	<title>Headlines</title>
+<style>
+    html {
+        font-family: "Helvetica";
+        background: white;
+    }
+    body {
+        background: lightgrey;
+        max-width: 900px;
+        margin: 0 auto;
+    }
+    #header {
+    padding-top: 5;
+    background: lightsteelblue;
+    }
+    #inner-header {
+    padding-left: 10;
+    }
+    #main{
+    padding-left: 10;
+    }
+    input[type="text"], select {
+    color: grey;
+    border: 1px solid lightsteelblue;
+    height: 30px;
+    line-height:15px;
+    margin: 2px 6px 16px 0px;
+    }
+    input[type="submit"] {
+    padding: 5px 10px 5px 10px;
+    color: black;
+    background: lightsteelblue;
+    border: none;
+    box-shadow: 1px 1px 1px #4C6E91;
+    }
+    input[type="submit"]:hover{
+    background: steelblue;
+    }
+</style>
+</head>
+    <div id="header">
+        <div id="inner-header">
+            <h1>Headlines</h1>
+            <p>Headlines. Currency. Weather.</p>
+        </div>
+    <hr />
+    </div>
+    <div id="main">
+	<h2>Current weather</h2>
+	<p>City: <b>{{weather.city}}, {{ weather.country }}</b></p>
+	<p>{{weather.description}} |{{weather.temperature}}&#8451;</p>
+    <h2>Currency</h2>
+    <form>
+        from: <select name="currency_from">
+            {% for currency in currencies %}
+              <option value="{{currency}}" {% if currency_from==currency %} selected="selected" {% endif %}  >
+                   
+                {{currency}}</option>
+            {% endfor %}
+            </select>
+        to: <select name="currency_to">
+            {% for currency in currencies %}
+                <option value="{{currency}}" {% if currency_to==currency %} selected="selected" {% endif %}  >
+                {{currency}}</option>
+            {% endfor %}
+            </select>
+        <input type="submit" value="Submit">
+    </form>
+    {{currency_from}} = {{currency_to}} {{rate}}
+	<h2>Headlines</h2>
+<body>
+<form>
+    <input type="text" name="publication" placeholder="news search" />
+    <input type="submit" value="Submit" />
+</form>
+<form>
+    <input type="text" name="city" placeholder="weather search" />
+    <input type="submit" value="Submit" />
+</form>
+{% for article in articles %}
+    <b><a href="{{ article.link }}">{{article.title}}</a></b><br />
+    <i>{{article.published}}</i><br />
+    <p>{{article.summary}}</p>
+<hr />
+{% endfor %}
+</div>
+</body>
+</html>

lab-13/templates/file_upload.html

+{% extends "upload_base.html" %}
+{% block body %}
+
+    <h1>Upload new File</h1>
+    <form method='post' enctype='multipart/form-data'>
+      <p><input type='file' name='file'>
+         <input type='submit' value='Upload'>
+    </form>
+
+{% endblock %}

lab-13/templates/file_upload_wtforms.html

+{% extends "upload_base.html" %}
+{% block body %}
+
+    <h1>Upload new File</h1>
+    <form class='form-horizontal' method='post' enctype='multipart/form-data'>
+
+        {{ form.csrf_token }}
+
+
+        <div class='form-group'>
+            <div class='col-md-6'>
+                {% if form.file.errors %}
+                    <ul class='errors'> 
+                        {% for error in form.file.errors %}
+                            <li>{{ error }}</li>
+                        {% endfor %}
+                    </ul>
+                {% endif %}
+                {{ form.file(class='form-control',placeholder='file') }}
+            </div>
+        </div>
+
+        <div class='form-group'>
+            <div class='col-md-6'>
+                {{ form.submit(class='btn btn-primary btn-block') }}
+            </div>
+        </div>
+
+    </form>
+
+
+
+
+
+
+
+
+{% endblock %}

lab-13/templates/get_headlines.html

+<html>
+	<head>
+		<title>Headlines</title>
+	</head>
+<body>
+	<h1>Headlines</h1>
+	
+    <form>
+        <input type="text" name="publication" placeholder="search for headlines" />
+        <input type="submit" value="Submit" />
+    </form>
+
+	{% for article in articles %}
+		<b>{{article.title}}</b><br />
+		<i>{{article.published}}</i><br />
+		<p>{{article.summary}}</p>
+		<hr />
+	{% endfor %}
+</body>
+</html>

lab-13/templates/index.html

+{% extends "base.html" %}
+
+{% block body %}
+
+<a href='/upload'>upload</a>
+
+{% for f in files %}
+
+<div class="row">
+  <div class="col-md-12"><img src="{{ f }}" /></div>
+</div> 
+{% endfor %}
+
+{% endblock %}

lab-13/templates/mock_login.html

+{% extends "mock_login_base.html" %}
+
+{% block body %}
+
+    <form method='post'>
+        <input type="text" name="username" placeholder="username" />
+        <input type="password" name="password" placeholder="password" />
+        <input type="submit" value="Submit" />
+    </form>
+
+
+
+{% for item in list %}
+
+    <div class="row">
+      <div class="col-md-4 h2">{{ item }}</div>
+      <div class="col-md-4"></div>
+      <div class="col-md-4"></div>
+    </div>
+
+{% endfor %}
+
+{% endblock %}

lab-13/templates/mock_login_base.html

+<!DOCTYPE html>
+<head>
+
+<meta charset="utf-8">
+
+
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+
+ <!-- Latest compiled and minified CSS -->
+ <link rel="stylesheet"
+ href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
+
+ <!-- jQuery library -->
+ <script
+ src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
+
+ <!-- Latest compiled JavaScript -->
+ <script
+ src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> 
+
+    <style>
+    </style>
+
+</head>
+<body>
+<div class="container">
+
+    {% for category, message in get_flashed_messages(with_categories=true) %}
+    <div class="alert alert-dismissable alert-warning alert-{{ category }}">
+    <button type="button" class="close" data-dismiss="alert">&times;</button>
+    {{ message }}
+    </div>
+    {% endfor %}
+
+    <div class="jumbotron">
+
+        {% block body %}{% endblock %}
+    </div>
+</div>
+</body>
+</html>