def login():
if current_user.is_authenticated: #如果用戶已經被認證過了
return redirect(url_for('index')) #直接回首頁不需要進行後面的驗證程序
title="登入頁面"
form=LoginForm() #原本是csrf_enabled=False寫了才不會暴 後期改寫到forms.py內
if form.validate_on_submit(): #如果form是透過submit點進來的
#msg="username={},password={},remember_me={}".format(
# form.username.data,
# form.password.data,
# form.remember_me.data
# ) #把三個參數直接寫在字串裡面的寫法
#print(msg)
u=User.query.filter_by(username=form.username.data).first()
#根據suername字串去filter_by出來只有有或沒有 first()第一個結果
if u is None or not u.check_password(form.password.data) :
#如果 沒有這個用戶或 密碼不符合返回 login畫面
print('invalid username or password')
return redirect(url_for('login'))
#否則就進入index 通過驗證的u ,根據用戶勾選是否記憶
login_user(u,remember=form.remember_me.data)
next_page = request.args.get('next')
# request方法 獲取登入前的頁面帶的next參數
if next_page: #如果有帶參數 代表從別的頁面跳入登陸頁
return redirect(next_page) #登入後返回原頁
#return redirect('/') #路徑回根目錄
return redirect(url_for('index'))
#改用url_for(函式名)的方式連結 萬一__init__.py改路徑才不用一個一個改
return render_template('login.html', title=title, form=form)
def login():
if current_user.is_authenticated:
return redirect(url_for('index'))
form = LoginForm()
if form.validate_on_submit():
# msg = 'username ={}, password={},remember_me={}'.format(
# form.username.data,
# form.password.data,
# form.remember_me.data
# )
# print(msg)
u = User.query.filter_by(username=form.username.data).first()
if u is None:
print('Username invalid')
return redirect(url_for('login'))
if u.check_password(form.username.data):
login_user(u, remember=form.remember_me.data)
next_page = request.args.get('next')
if next_page:
return redirect(next_page)
return redirect(url_for('index'))
else:
print('Password invalid')
return redirect(url_for('login'))
return render_template('login.html', title='Sign in', form=form)
def login():
# form = LoginForm(csrf_enabled=False) # 初学暂时不需要考虑csrf安全问题 参数已过时
form = LoginForm(meta={'csrf': False}) # 上行参数已过时 替换新参数
if form.validate_on_submit():
msg = "username={}, password={}, remember_me={}".format(
form.username.data, form.password.data, form.remember_me.data)
print(msg)
return redirect(url_for('index'))
return render_template('login.html', title="Sign In", form=form)
def login():
form = LoginForm(csrf_enabled=False)
if form.validate_on_submit():
msg = "username={},password={},remember_me={}".format(
form.username.data,
form.password.data,
form.remember_me.data
)
print(msg)
return redirect(url_for('index'))
return render_template('login.html',title="登录",form=form)
def login():
if current_user.is_authenticated:
return redirect(url_for('index'))
form = LoginForm()
if form.validate_on_submit():
u = User.query.filter_by(username=form.username.data).first()
if u is None or not u.check_password(form.password.data):
print('invalid username or password')
return redirect(url_for('login'))
login_user(u, remember=form.remember_me.data)
next_page = request.args.get('next')
if next_page:
return redirect(next_page)
return redirect(url_for('index'))
return render_template('login.html', title="登录", form=form)
def login():
if current_user.is_authenticated: # 如果当前用户已经登录
return redirect(url_for('index'))
form = LoginForm()
if form.validate_on_submit(): # validate_on_submit() 如果能通过所有验证
u = User.query.filter_by(username=form.username.data).first()
if u is None or not u.check_password(form.password.data): # check the username and password
flash('Invalid username or password')
return redirect(url_for('login'))
login_user(u, remember=form.remember_me.data) # log the user in
next_page = request.args.get('next') # 导入了flask中的request，获取下一页的重定向
if not next_page or url_parse(next_page).netloc != '':
return redirect(url_for('index'))
# redirect 重定向
# url_for: find the url which is bind with index function
return redirect(next_page)
return render_template('login.html', title="Sign In", form=form)
def login():
if current_user.is_authenticated:
return redirect(url_for('index'))
# form1 = Login_Form(csrf_enabled = False)
form1 = LoginForm()
if form1.validate_on_submit():
u = User.query.filter_by(username=form1.username.data).first()
if u is None or not u.check_password(
form1.password.data): #如果账号不存在或者密码不正确
print('invalid username or passwod')
return redirect(url_for('login'))
login_user(u, remember=form1.remember_me.data)
next_page = request.args.get(
'next') #作用：在登陆之前可能会点其他入口的页面，在登陆之后会直接跳转到那个页面
if next_page:
return redirect(next_page)
return redirect(url_for('index'))
return render_template('login.html', title='sign in', form=form1)
def login():
# 判断用户是否登录
if current_user.is_authenticated:
return redirect(url_for('index')) #若登录，重定向到主页
# 若没有登陆
form = LoginForm()
if form.validate_on_submit():
# 通过数据库验证用户身份
u = User.query.filter_by(username=form.username.data).first()
if u is None or not u.check_password(form.password.data): # 如果验证不通过
print('Invalid username or password')
return redirect(url_for('login'))
# log user in
login_user(u, remember=form.remember_me.data)
# 设置登陆后的重定向页
next_page = request.args.get('next')
if next_page:
return redirect(next_page)
return redirect(url_for('index'))
return render_template('login.html', title="Login", form=form)