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 ()