龙卷风登录示例/教程

Question

我想知道是否有人知道在Tornado中实现登录/注册页面的任何示例代码或教程？我看过它附带的例子,但它们看起来非常以facebook/oauth为中心.

Answer 1

这是一个简单的示例处理程序,它需要一个包含用户名/密码表单的login.html模板.我没有注册示例,但它非常相似,在帖子上验证输入并插入用户记录而不是验证.

class BaseHandler(tornado.web.RequestHandler):

    def get_login_url(self):
        return u"/login"

    def get_current_user(self):
        user_json = self.get_secure_cookie("user")
        if user_json:
            return tornado.escape.json_decode(user_json)
        else:
            return None

class LoginHandler(BaseHandler):

    def get(self):
        self.render("login.html", next=self.get_argument("next","/"))

    def post(self):
        username = self.get_argument("username", "")
        password = self.get_argument("password", "")
        # The authenticate method should match a username and password
        # to a username and password hash in the database users table.
        # Implementation left as an exercise for the reader.
        auth = self.db.authenticate(username, password)
        if auth:
            self.set_current_user(username)
            self.redirect(self.get_argument("next", u"/"))
        else:
            error_msg = u"?error=" + tornado.escape.url_escape("Login incorrect.")
            self.redirect(u"/login" + error_msg)

    def set_current_user(self, user):
        if user:
            self.set_secure_cookie("user", tornado.escape.json_encode(user))
        else:
            self.clear_cookie("user")

class LogoutHandler(BaseHandler):

    def get(self):
        self.clear_cookie("user")
        self.redirect(u"/login)

Answer 2

我开始使用Cole的例子,但意识到我正在创建一个访问数据库的帐户,这可能与我们的webapp帐户不同.

我已将上面的示例更改为使用bcrpyt.现在,用户与我们的webapp的连接与我们的webapp与数据库的连接不同.我在github上的示例应用程序

注意:bcrpyt计算量很大,会阻塞IO循环

class BaseHandler(tornado.web.RequestHandler):

  def get_login_url(self):
    return u"/login"

  def get_current_user(self):
    user_json = self.get_secure_cookie("user")
    if user_json:
      return tornado.escape.json_decode(user_json)
    else:
      return None


class LoginHandler(BaseHandler):

  def get(self):
    self.render("login.html", next=self.get_argument("next","/"), message=self.get_argument("error","") )

  def post(self):
    email = self.get_argument("email", "")
    password = self.get_argument("password", "")

    user = self.application.syncdb['users'].find_one( { 'user': email } )

    if user and user['password'] and bcrypt.hashpw(password, user['password']) == user['password']:
      self.set_current_user(email)
      self.redirect("hello")
    else:
      error_msg = u"?error=" + tornado.escape.url_escape("Login incorrect.")
      self.redirect(u"/login" + error_msg)

  def set_current_user(self, user):
    print "setting "+user
    if user:
      self.set_secure_cookie("user", tornado.escape.json_encode(user))
    else:
      self.clear_cookie("user")


class RegisterHandler(LoginHandler):

  def get(self):
    self.render(  "register.html", next=self.get_argument("next","/"))

  def post(self):
    email = self.get_argument("email", "")

    already_taken = self.application.syncdb['users'].find_one( { 'user': email } )
    if already_taken:
      error_msg = u"?error=" + tornado.escape.url_escape("Login name already taken")
      self.redirect(u"/login" + error_msg)


    password = self.get_argument("password", "")
    hashed_pass = bcrypt.hashpw(password, bcrypt.gensalt(8))

    user = {}
    user['user'] = email
    user['password'] = hashed_pass

    auth = self.application.syncdb['users'].save(user)
    self.set_current_user(email)

    self.redirect("hello")