flask下，实现简单博客3

flask下，实现简单博客2

所有视图（views.py完整代码）：

# -*- coding: utf-8 -*-

"""

Flaskr

~~~~~~

A microblog example application written as Flask tutorial with

Flask and sqlite3.

:copyright: (c) 2010 by Armin Ronacher.

:license: BSD, see LICENSE for more details.

"""

from __future__ import with_statement

from sqlite3 import dbapi2 as sqlite3

from flask import Flask, request, session, g, redirect, url_for, abort, \

render_template, flash, _app_ctx_stack

# 创建数据库

DATABASE = 'blog.db' DEBUG = True SECRET_KEY = 'development key' USERNAME = 'admin' PASSWORD = '123'

#初始化环境

# create our little application :)

app = Flask(__name__)

app.config.from_object(__name__)

app.config.from_envvar('FLASKR_SETTINGS', silent=True)

#初始化数据库

def init_db():

"""Creates the database tables."""

with app.app_context():

db = get_db()

with app.open_resource('schema.sql') as f:

db.cursor().executescript(f.read())

db.commit()

def get_db():

"""Opens a new database connection if there is none yet for the

current application context.

"""

top = _app_ctx_stack.top

if not hasattr(top, 'sqlite_db'):

sqlite_db = sqlite3.connect(app.config['DATABASE'])

sqlite_db.row_factory = sqlite3.Row

top.sqlite_db = sqlite_db

return top.sqlite_db

@app.teardown_appcontext

def close_db_connection(exception):

"""Closes the database again at the end of the request."""

top = _app_ctx_stack.top

if hasattr(top, 'sqlite_db'):

top.sqlite_db.close()

@app.route('/')

def show_entries():

db = get_db()

cur = db.execute('select title, text from entries order by id desc')

entries = cur.fetchall()

return render_template('show_entries.html', entries=entries)

@app.route('/add', methods=['POST'])

def add_entry():

if not session.get('logged_in'):

abort(401)

db = get_db()

db.execute('insert into entries (title, text) values (?, ?)',

[request.form['title'], request.form['text']])

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 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_db()

app.run()