Merge branch 'master' of github.com:cewing/training.python_web

Author: wwhawkww

assignments/teachers/week04/answers/homework.py

@@ -19,6 +19,7 @@ def __init__(self, db, urls):
 
     def __call__(self, environ, start_response):
         headers = [('Content-type', 'text/html')]
+        import pdb; pdb.set_trace( )
         try:
             path = environ.get('PATH_INFO', None)
             if path is None:
@@ -44,9 +45,9 @@ def __call__(self, environ, start_response):
     def books(self):
         core = ['<h1>Book Database</h1>',
                 '<ul>']
-        tmpl = '<li><a href="http://github.com/book/%s">%s</a></li>'
-        for book_id, book_data in self.db.items():
-            core.append(tmpl % (book_id, book_data['title']))
+        tmpl = '<li><a href="http://github.com/book/%%3Cspan%20class="x x-first x-last">(id)s">%(title)s</a></li>'
+        for data in self.db.titles():
+            core.append(tmpl % data)
         core.append('</ul>')
         body = "\n".join(core)
         context = {'page_title': "Book Database",
@@ -66,9 +67,10 @@ def book(self, id):
 </dl>
 <p><a href="../">More Books</a></p>
 """
-        book = self.db.get(id, None)
-        if book is None:
-            raise NameError
+        try:
+            book = self.db.title_info(id)
+        except KeyError:
+            raise NameError('book not found')
         title = "Book Database: %s" % book['isbn']
         context = {'page_title': title,
                    'page_body': tmpl % book}
@@ -99,7 +101,7 @@ def _get_callable(self, path):
     # this block will be called when the script is run directly
     from wsgiref.simple_server import make_server
     import bookdb
-    application = MyApplication(bookdb.database, URLS)
+    application = MyApplication(bookdb.BookDB(), URLS)
     srv = make_server('localhost', 8080, application)
     srv.serve_forever()
 else:
@@ -114,4 +116,4 @@ def _get_callable(self, path):
     import sys
     sys.path.append('/path/to/directory/containing/bookdb/on/server')
     import bookdb
-    application = MyApplication(bookdb.database, URLS)
+    application = MyApplication(bookdb.BookDB(), URLS)

assignments/teachers/week05/answers/book_app/book_app.py

@@ -0,0 +1,24 @@
+from flask import Flask
+from flask import render_template
+
+import bookdb
+
+app = Flask(__name__)
+
+db = bookdb.BookDB()
+
+
+@app.route('/')
+def books():
+    books = db.titles()
+    return render_template('book_list.html', books=books)
+
+
+@app.route('/book/<book_id>/')
+def book(book_id):
+    book = db.title_info(book_id)
+    return render_template('book_detail.html', book=book)
+
+
+if __name__ == '__main__':
+    app.run(debug=True)

assignments/teachers/week05/answers/book_app/bookdb.py

@@ -0,0 +1,39 @@
+
+
+class BookDB():
+    def titles(self):
+        titles = [dict(id=id, title=database[id]['title']) for id in database.keys()]
+        return titles
+
+    def title_info(self, id):
+        return database[id]
+
+
+# let's pretend we're getting this information from a database somewhere
+database = {
+    'id1' : {'title' : 'CherryPy Essentials: Rapid Python Web Application Development',
+             'isbn' : '978-1904811848',
+             'publisher' : 'Packt Publishing (March 31, 2007)',
+             'author' : 'Sylvain Hellegouarch',
+           },
+    'id2' : {'title' : 'Python for Software Design: How to Think Like a Computer Scientist',
+             'isbn' : '978-0521725965',
+             'publisher' : 'Cambridge University Press; 1 edition (March 16, 2009)',
+             'author' : 'Allen B. Downey',
+           },
+    'id3' : {'title' : 'Foundations of Python Network Programming',
+             'isbn' : '978-1430230038',
+             'publisher' : 'Apress; 2 edition (December 21, 2010)',
+             'author' : 'John Goerzen',
+           },
+    'id4' : {'title' : 'Python Cookbook, Second Edition',
+             'isbn' : '978-0-596-00797-3',
+             'publisher' : 'O''Reilly Media',
+             'author' : 'Alex Martelli, Anna Ravenscroft, David Ascher',
+           },
+    'id5' : {'title' : 'The Pragmatic Programmer: From Journeyman to Master',
+             'isbn' : '978-0201616224',
+             'publisher' : 'Addison-Wesley Professional (October 30, 1999)',
+             'author' : 'Andrew Hunt, David Thomas',
+           },
+}

assignments/teachers/week05/answers/book_app/templates/book_detail.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<html>
+  <head>
+    <title>{{ book.title }}</title>
+  </head>
+  <body>
+    <h1>{{ book.title }}</h1>
+    <dl>
+      <dt>Author</dt><dd>{{ book.author }}</dd>
+      <dt>Publisher</dt><dd>{{ book.publisher }}</dd>
+      <dt>ISBN</dt><dd>{{ book.isbn }}</dd>
+    </dl>
+    <p><a href="{{ url_for('books') }}">Back to the list</a></p>
+  </body>
+</html>

assignments/teachers/week05/answers/book_app/templates/book_list.html

@@ -0,0 +1,16 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Python Books</title>
+  </head>
+  <body>
+    <h1>Summer Reading</h1>
+    <p>Here's a list of books you might enjoy.  Click a title to read more 
+       about that book.</p>
+    <ul>
+    {% for book in books %}
+      <li><a href="{{ url_for('book', book_id=book.id) }}">{{ book.title }}</a></li>
+    {% endfor %}
+    </ul>
+  </body>
+</html>

assignments/teachers/week05/answers/flaskr/flaskr.py

@@ -0,0 +1,93 @@
+import sqlite3
+from contextlib import closing
+
+from flask import Flask
+from flask import request
+from flask import session
+from flask import g
+from flask import redirect
+from flask import url_for
+from flask import abort
+from flask import render_template
+from flask import flash
+
+# configuration
+DATABASE = '/tmp/flaskr.db'
+DEBUG = True
+SECRET_KEY = 'devkey'
+USERNAME = 'admin'
+PASSWORD = 'default'
+
+
+app = Flask(__name__)
+app.config.from_object(__name__)
+
+def connect_db():
+    return sqlite3.connect(app.config['DATABASE'])
+
+
+def init_db():
+    with closing(connect_db()) as db:
+        with app.open_resource('schema.sql') as f:
+            db.cursor().executescript(f.read())
+        db.commit()
+
+
+@app.before_request
+def before_request():
+    g.db = connect_db()
+
+
+@app.teardown_request
+def teardown_request(exception):
+    g.db.close()
+
+
+def get_all_entries():
+    cur = g.db.execute('select title, text from entries order by id desc')
+    entries = [dict(title=row[0], text=row[1]) for row in cur.fetchall()]
+    return entries
+
+
+@app.route('/')
+def show_entries():
+    entries = get_all_entries()
+    return render_template('show_entries.html', entries=entries)
+
+
+@app.route('/add', methods=['POST'])
+def add_entry():
+    if not session.get('logged_in'):
+        abort(401)
+    g.db.execute('insert into entries (title, text) values (?, ?)',
+                 [request.form['title'], request.form['text']])
+    g.db.commit()
+    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 are 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 are now logged out')
+    return redirect(url_for('show_entries'))
+
+
+if __name__ == '__main__':
+    app.run()
+

assignments/teachers/week05/answers/flaskr/flaskr_tests.py

@@ -0,0 +1,40 @@
+import os
+import flaskr
+import unittest
+import tempfile
+
+
+class FlaskrTestCase(unittest.TestCase):
+
+    def setUp(self):
+        self.db_fd, flaskr.app.config['DATABASE'] = tempfile.mkstemp()
+        flaskr.app.config['TESTING'] = True
+        self.app = flaskr.app.test_client()
+        flaskr.init_db()
+
+    def tearDown(self):
+        os.close(self.db_fd)
+        os.unlink(flaskr.app.config['DATABASE'])
+
+
+    def login(self, username, password):
+        return self.app.post('/login', data=dict(
+            username=username,
+            password=password
+        ), follow_redirects=True)
+
+
+    def logout(self):
+        return self.app.get('/logout', follow_redirects=True)
+
+
+    def test_get_all_entries_empty(self):
+        with self.app.test_request_context('/'):
+            self.app.preprocess_request()
+            entries = flaskr.get_all_entries()
+            self.assertEquals(entries, [])
+
+
+if __name__ == '__main__':
+    unittest.main()
+

assignments/teachers/week05/answers/flaskr/schema.sql

@@ -0,0 +1,6 @@
+drop table if exists entries;
+create table entries (
+    id integer primary key autoincrement,
+    title string not null,
+    text string not null
+);