Python框架 Flask 项目实战教程

(env)admin@admindeMacBook-Air:~/project/python/flask/project$tree
.
├──app
│├──__init__.py
│├──models.py
│├──static
│├──templates
││├──404.html
││├──500.html
││├──index.html
││└──user.html
│├──views.py
├──app.db
├──config.py
├──db_create.py
├──db_downgrade.py
├──db_migrate.py
├──db_repository
│├──__init__.py
│├──manage.py
│├──migrate.cfg
│├──README
│└──versions
│├──001_migration.py
│├──002_migration.py
│├──__init__.py
├──db_upgrade.py
├──requirements.txt
├──run.py
├──tmp

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

importre
fromflask_wtfimportForm
fromflask_wtf.html5importEmailField
fromwtformsimportTextField,PasswordField,BooleanField
fromwtforms.validatorsimportDataRequired,ValidationError
frommodelsimportUser
fromhashlibimportmd5

classRegisterFrom(Form):
nickname=TextField(‘nickname’,validators=[DataRequired()])
email=EmailField(’email’,validators=[DataRequired()])
password=PasswordField(‘password’,validators=[DataRequired()])
conform=PasswordField(‘conform’,validators=[DataRequired()])

defvalidate_nickname(self,field):
nickname=field.data.strip()
iflen(nickname)<3orlen(nickname)>20:
raiseValidationError(‘nicknamemustbe3letteratleast’)
elifnotre.search(r’^\w+$’,nickname):
raiseValidationError(‘Usernamescancontainonlyalphanumericcharactersandunderscores.’)
else:
#验证是否已经注册
u=User.query.filter_by(nickname=nickname).first()
ifu:
raiseValidationError(‘Thenicknamealreadyexists’)

defvalidate_email(self,field):
email=field.data.strip()
email=User.query.filter_by(email=email).first()
ifemail:
raiseValidationError(‘Theemailalreadyexists’)

defvalidate_password(self,field):
password=field.data.strip()
iflen(password)<6:
raiseValidationError(‘passwordmustbe3letteratleast’)

defvalidate_conform(self,field):
conform=field.data.strip()
ifself.data[‘password’]!=conform:
raiseValidationError(‘thepasswordandconformaredifferent’)

@app.route(‘/account/signup’,methods=[‘GET’,‘POST’])
defsignup():
form=RegisterFrom()
ifrequest.method==‘POST’:
ifform.validate_on_submit():
psdmd5=md5(form.data[‘password’])
password=psdmd5.hexdigest()
u=User(nickname=form.data[‘nickname’],email=form.data[’email’],password=password)
try:
db.session.add(u)
db.session.commit()
flash(‘signupsuccessful’)

exceptException,e:
return‘somethinggoeswrong’
returnredirect(url_for(‘signin’))

returnrender_template(‘signup.html’,form=form)

<!–extendbaselayout–>
{%extends“base.html”%}

{%blockcontent%}
<formmethod=”POST”action=”>
{{form.hidden_tag()}}
<p>{{form.nickname.label}}{{form.nickname(size=20)}}</p>
<p>{{form.email.label}}{{form.email(size=20)}}</p>
<p>{{form.password.label}}{{form.password(size=20)}}</p>
<p>{{form.conform.label}}{{form.conform(size=20)}}</p>
<inputtype=”submit”value=”SignUp”>
<inputtype=”reset”value=”Reset”>
</form>

{{form.errors}}
{%endblock%}

classLoginForm(Form):
nickname=TextField(‘nickname’,validators=[DataRequired()])
password=PasswordField(‘password’,validators=[DataRequired()])
remember_me=BooleanField(‘remember_me’,default=False)

defvalidate_nickname(self,field):
nickname=field.data.strip()
iflen(nickname)<3orlen(nickname)>20:
raiseValidationError(‘nicknamemustbe3letteratleast’)
elifnotre.search(r’^\w+$’,nickname):
raiseValidationError(‘Usernamescancontainonlyalphanumericcharactersandunderscores.’)
else:
returnnickname

@app.route(‘/account/signin’,methods=[‘GET’,‘POST’])
defsignin():
form=LoginForm()
ifrequest.method==‘POST’:
ifform.validate_on_submit():
nickname=form.data[‘nickname’]
psdmd5=md5(form.data[‘password’])
password=psdmd5.hexdigest()
u=User.query.filter_by(nickname=nickname,password=password).first()
ifu:
session[‘signin’]=True
flash(‘signinsuccessful’)
returnredirect(url_for(‘index’))
else:
flash(u’用户名或者密码错误’)
returnrender_template(‘signin.html’,form=form)

@app.route(‘/account/signout’)
defsignout():
session.pop(‘signin’,None)
flash(‘signoutsuccessful’)
returnredirect(‘index’)

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

importos
fromflaskimportFlask
fromflask.ext.sqlalchemyimportSQLAlchemy
fromflask.ext.loginimportLoginManager
fromconfigimportbasedir

app=Flask(__name__)

app.config.from_object(‘config’)

db=SQLAlchemy(app)#初始化数据库管理对象
login_manager=LoginManager()#初始化登录管理对象
login_manager.init_app(app)
login_manager.login_view=“signin”#登录跳转视图
login_manager.login_message=u”Bonvoluensalutiporuzitiopaĝo.”#登录跳转视图前的输出消息

#fromappimportviews,models

importviews,models

fromflask.ext.loginimportlogin_user,logout_user,current_user,login_required
fromappimportapp,db,login_manager

@login_manager.user_loader
defload_user(userid):
returnUser.query.get(userid)

@app.route(‘/account/signin’,methods=[‘GET’,‘POST’])
defsignin():
form=LoginForm()
ifrequest.method==‘POST’:
ifform.validate_on_submit():
nickname=form.data[‘nickname’]
psdmd5=md5(form.data[‘password’])
password=psdmd5.hexdigest()
remember_me=form.data[‘remember_me’]
user=User.query.filter_by(nickname=nickname,password=password).first()
ifuser:
login_user(user,remember=remember_me)
flash(‘signinsuccessful’)
returnredirect(request.args.get(“next”)orurl_for(“index”))
else:
flash(u’用户名或者密码错误’)
returnrender_template(‘signin.html’,form=form)

@app.route(‘/account/signout’)

@login_required
defsignout():
logout_user()
flash(‘signoutsuccessful’)
returnredirect(‘index’)

<html>
<head>
<metahttp-equiv=”Content-Type”content=”text/html;charset=utf-8″/>
{%iftitle%}
<title>{{title}}–microblog</title>
{%else%}
<title>microblog</title>
{%endif%}
</head>
<body>
<divclass="metanav">

<div>
<ahref=”{{url_for(‘index’)}}”>Home</a>
{%ifcurrent_user.is_authenticated()%}
<ahref=”{{url_for(‘signout’)}}”>signout</a>
{%else%}
<ahref=”{{url_for(‘signin’)}}”>signin</a>
{%endif%}
</div>

{%formessageinget_flashed_messages()%}
<divclass="flash">{{message}}</div>
{%endfor%}
{%blockcontent%}{%endblock%}
</body>
</html>