Question

我已经使用python在Flask Web框架中设计了管理页面。然后，我将管理应用程序部署在共享托管服务器上。我在重定向到下一个URL时遇到问题。那就是当我单击登录按钮时，它显示404 URL not found错误。同样在URL窗口的错误页面上，它会附加上一个URL。但问题是，它在我的本地计算机上运行良好。我不知道出什么问题了。编辑：基本上，它不转到下一页，因为单击登录后将其重定向到“索引” 这是我的烧瓶应用程序代码。

from flask import Flask, render_template, redirect, url_for, request
from flask_bootstrap import Bootstrap
from flask_wtf import FlaskForm 
from wtforms import StringField, PasswordField, BooleanField
from wtforms.validators import InputRequired, Email, Length
from flask_sqlalchemy  import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash
from flask_login import LoginManager, UserMixin, login_user,  login_required, logout_user, current_user
from werkzeug import secure_filename
import sqlite3
import hashlib
import os
import models as dbHandler
import stringtolist as stol 

UPLOAD_FOLDER = 'static/images/project_img/'

adminapp = Flask(__name__)
application = adminapp
adminapp.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
adminapp.config['SECRET_KEY'] = 'Thisissupposedtobesecret!'
adminapp.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db'
bootstrap = Bootstrap(adminapp)
db = SQLAlchemy(adminapp)
login_manager = LoginManager()
login_manager.init_app(adminapp)
login_manager.login_view = 'login'


class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(15), unique=True)
    email = db.Column(db.String(50), unique=True)
    password = db.Column(db.String(80))

@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))

class LoginForm(FlaskForm):
    username = StringField('username', validators=[InputRequired(), Length(min=4, max=15)])
    password = PasswordField('password', validators=[InputRequired(), Length(min=8, max=80)])
    remember = BooleanField('remember me')

class RegisterForm(FlaskForm):
    email = StringField('email', validators=[InputRequired(), Email(message='Invalid email'), Length(max=50)])
    username = StringField('username', validators=[InputRequired(), Length(min=4, max=15)])
    password = PasswordField('password', validators=[InputRequired(), Length(min=8, max=80)])

@adminapp.route('/')
@login_required
def index1():
    return render_template('index1.html', name=current_user.username)

@adminapp.route('/login', methods=['GET', 'POST'])
def login():
    form = LoginForm()

    if form.validate_on_submit():
        user = User.query.filter_by(username=form.username.data).first()
        if user:
            if check_password_hash(user.password, form.password.data):
                login_user(user, remember=form.remember.data)
                return redirect(url_for('index1'))    #After Login successfully browser needs to redirect to index1 page which dashboard page.

        return '<h1>Invalid username or password</h1>'
        #return '<h1>' + form.username.data + ' ' + form.password.data + '</h1>'

    return render_template('login.html', form=form)


@adminapp.route('/logout')
@login_required
def logout():
    logout_user()
    return redirect(url_for('login'))

if __name__ == '__main__':
    adminapp.run(debug=True)

EDIT2：好的，所以这里是登录用户的最小代码。当我点击“登录”按钮时，它会从该位置附加网址重定向。像这样

domainname.com/login ->登录之前URL窗口中的URL

domainname.com/login ->当我点击“登录”按钮时，它将再次重定向到该URL，

它应该像这样进入index1

domainname.com/index1

这是我的

login.html

{% extends "bootstrap/base.html" %}
{% import "bootstrap/wtf.html" as wtf %}

{% block title %}
Login
{% endblock %}

{% block styles %}
{{super()}}
<link rel="stylesheet" href="{{url_for('.static', filename='../static/css/signin.css')}}">
{% endblock %}

{% block content %}
    <div class="container">

      <form class="form-signin" method="POST" action="/login">
        <h2 class="form-signin-heading">Please sign in</h2>
        {{ form.hidden_tag() }}
        {{ wtf.form_field(form.username) }}
        {{ wtf.form_field(form.password) }}
        {{ wtf.form_field(form.remember) }}
        <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
       <!--  <button class="btn btn-lg btn-primary btn-block" onclick="location.href='{{ url_for('signup') }}'" type="button">Sign Up</button> -->
      </form>

    </div> <!-- /container -->
{% endblock %}

Answer 1

当我访问您的演示网站时，您的代码对我有用。我认为您犯的错误是了解url_for('index1')的作用。

您可以这样定义一条路线：

@adminapp.route('/')
@login_required
def index1():
    return render_template('index1.html', name=current_user.username)

在这种情况下，路由为/。方法的名称为index1。路由为 not /index1。因此，如果您尝试转到/index1，则由于该路由不存在，它将给您404错误。

url_for()以方法名称作为输入，并返回一条路由作为输出。在这种情况下，方法的名称为“ index1”，输出为“ /”，因为这是您定义的实际HTTP路由。

登录后，烧瓶重定向网址未重定向到首页

1 个答案: