Initial version

.gitignore

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+*.db
+*.pyc

pastebin.py

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+from datetime import datetime
+from flask import Flask, request, url_for, redirect, g, session, flash, \
+     abort, render_template
+from flask.ext.sqlalchemy import SQLAlchemy
+from flask.ext.oauth import OAuth
+
+
+app = Flask(__name__)
+app.config.update(
+    DEBUG=True,
+    SQLALCHEMY_DATABASE_URI='sqlite:///pastebin.db',
+    SECRET_KEY='development-key'
+)
+db = SQLAlchemy(app)
+oauth = OAuth()
+
+facebook = oauth.remote_app('facebook',
+    base_url='https://graph.facebook.com/',
+    request_token_url=None,
+    access_token_url='/oauth/access_token',
+    authorize_url='https://www.facebook.com/dialog/oauth',
+    consumer_key='188477911223606',
+    consumer_secret='621413ddea2bcc5b2e83d42fc40495de',
+    request_token_params={'scope': 'email'}
+)
+
+
+class Paste(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    code = db.Column(db.Text)
+    pub_date = db.Column(db.DateTime)
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+
+    def __init__(self, user, code):
+        self.user = user
+        self.code = code
+        self.pub_date = datetime.utcnow()
+
+
+class User(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    display_name = db.Column(db.String(120))
+    fb_id = db.Column(db.String(30), unique=True)
+    pastes = db.relationship(Paste, lazy='dynamic', backref='user')
+
+
+@app.before_request
+def check_user_status():
+    g.user = None
+    if 'user_id' in session:
+        g.user = User.query.get(session['user_id'])
+
+
+@app.route('/', methods=['GET', 'POST'])
+def new_paste():
+    if request.method == 'POST' and request.form['code']:
+        paste = Paste(g.user, request.form['code'])
+        db.session.add(paste)
+        db.session.commit()
+        return redirect(url_for('show_paste', paste_id=paste.id))
+    return render_template('new_paste.html')
+
+
+@app.route('/<int:paste_id>')
+def show_paste(paste_id):
+    paste = Paste.query.get_or_404(paste_id)
+    return render_template('show_paste.html', paste=paste)
+
+
+@app.route('/<int:paste_id>/delete', methods=['GET', 'POST'])
+def delete_paste(paste_id):
+    paste = Paste.query.get_or_404(paste_id)
+    if g.user is None or g.user != paste.user:
+        abort(401)
+    if request.method == 'POST':
+        if 'yes' in request.form:
+            db.session.delete(paste)
+            db.session.commit()
+            flash('Paste was deleted')
+            return redirect(url_for('new_paste'))
+        else:
+            return redirect(url_for('show_paste', paste_id=paste.id))
+    return render_template('delete_paste.html', paste=paste)
+
+
+@app.route('/my-pastes')
+def my_pastes():
+    if g.user is None:
+        return redirect(url_for('login', next=request.url))
+    pastes = Paste.query.filter_by(user=g.user).all()
+    return render_template('my_pastes.html', pastes=pastes)
+
+
+@app.route('/login')
+def login():
+    return facebook.authorize(callback=url_for('facebook_authorized',
+        next=request.args.get('next') or request.referrer or None,
+        _external=True))
+
+
+@app.route('/logout')
+def logout():
+    session.clear()
+    flash('You were logged out')
+    return redirect(url_for('new_paste'))
+
+
+@app.route('/login/authorized')
+@facebook.authorized_handler
+def facebook_authorized(resp):
+    next_url = request.args.get('next') or url_for('index')
+    if resp is None:
+        flash('You denied the login')
+        return redirect(next_url)
+
+    session['fb_access_token'] = (resp['access_token'], '')
+
+    me = facebook.get('/me')
+    user = User.query.filter_by(fb_id=me.data['id']).first()
+    if user is None:
+        user = User()
+        user.fb_id = me.data['id']
+        db.session.add(user)
+
+    user.display_name = me.data['name']
+    db.session.commit()
+    session['user_id'] = user.id
+
+    flash('You are now logged in as %s' % user.display_name)
+    return redirect(next_url)
+
+
+@facebook.tokengetter
+def get_facebook_oauth_token():
+    return session.get('fb_access_token')
+
+
+if __name__ == '__main__':
+    app.run()

static/style.css

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+body          { margin: 0; padding: 0; }
+body, input   { font-size: 16px; font-family: 'Helvetica Neue', sans-serif; }
+.page         { margin: 50px auto; width: 740px; }
+h1            { margin: 0; font-weight: normal; color: #c00; }
+a             { color: black; }
+a:hover       { color: #c00; }
+.nav          { margin: 0 0 20px 0; list-style: none; padding: 0; }
+.nav li       { display: inline; }
+.nav li + li:before { content: " // "; }
+h2            { font-weight: normal; margin: 0; }
+dl            { overflow: auto; font-size: 14px; }
+dl dt         { font-weight: bold; width: 90px; float: left;
+                clear: left; }
+dl dd         { float: left; margin: 0; padding: 0; }
+pre, textarea { font-family: 'Consolas', monospace; font-size: 14px;
+                background: #eee; padding: 0; margin: 0; }
+textarea      { border: none; width: 720px; }
+.code, .flash { background: #eee; margin: 10px -30px; padding: 10px 30px; }

templates/delete_paste.html

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+{% extends "layout.html" %}
+{% block title %}Delete Paste #{{ paste.id }}{% endblock %}
+{% block body %}
+  <h2>Delete Paste #{{ paste.id }}</h2>
+  <form action="" method=post>
+    <p>Are you sure you want to delete the paste?  You cannot undo this.
+    <p>
+      <input type=submit name=yes value=Yes>
+      <input type=submit name=no value=No>
+  </form>
+{% endblock %}

templates/layout.html

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+<!doctype html>
+<title>{% block title %}{% endblock %} | Flask Pastebin</title>
+<link rel=stylesheet type=text/css href="{{ url_for('static', filename='style.css') }}">
+<div class=page>
+  <h1>Flask Pastebin</h1>
+  <ul class=nav>
+    <li><a href="{{ url_for('new_paste') }}">New Paste</a>
+    {% if g.user %}
+    <li><a href="{{ url_for('my_pastes') }}">My Pastes</a>
+    <li><a href="{{ url_for('logout') }}">Sign out ({{ g.user.display_name }})</a>
+    {% else %}
+    <li><a href="{{ url_for('login') }}">Sign in with Facebook</a>
+    {% endif %}
+  </ul>
+  {% for message in get_flashed_messages() %}
+    <p class=flash>{{ message }}
+  {% endfor %}
+  {% block body %}{% endblock %}
+</div>

templates/my_pastes.html

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+{% extends "layout.html" %}
+{% block title %}My Pastes{% endblock %}
+{% block body %}
+  <h2>My Pastes</h2>
+  <ul>
+  {% for paste in pastes %}
+    <li><a href="{{ url_for('show_paste', paste_id=paste.id) }}">#{{ paste.id }}</a>
+      from {{ paste.pub_date.strftime('%Y-%m-%d @ %H:%M') }}
+  {% endfor %}
+  </ul>
+{% endblock %}

templates/new_paste.html

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+{% extends "layout.html" %}
+{% block title %}New Paste{% endblock %}
+{% block body %}
+  <h2>New Paste</h2>
+  <form action="" method=post>
+    <div class=code><textarea name=code cols=60 rows=18></textarea></div>
+    <p><input type=submit value="New Paste">
+  </form>
+{% endblock %}

templates/show_paste.html

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+{% extends "layout.html" %}
+{% block title %}Paste #{{ paste.id }}{% endblock %}
+{% block body %}
+  <h2>Paste #{{ paste.id }}</h2>
+  <dl>
+    {% if paste.user %}
+    <dt>Author
+    <dd>{{ paste.user.display_name }}
+    {% endif %}
+    <dt>Date
+    <dd>{{ paste.pub_date.strftime('%Y-%m-%d @ %H:%M') }}
+    {% if g.user and paste.user == g.user %}
+    <dt>Actions
+    <dd><a href="{{ url_for('delete_paste', paste_id=paste.id) }}">Delete</a>
+    {% endif %}
+  </dl>
+  <div class=code><pre>{{ paste.code }}</pre></div>
+{% endblock %}