1. 介绍 

"""安装:pip install Flask-JWT-Extended创建对象 初始化与app绑定jwt = JWTManager(app)  # 初始化JWTManager设置 Cookie 的选项:除了设置 cookie 的名称和值之外，你还可以指定其他的选项，例如：过期时间 (max_age)：   指定 cookie 何时过期。# max_age=60 * 60 * 24 * 7  # 7天有效期max_age=datetime.timedelta(days=2)1. 设置cookies# 设置cookies成功 重定向到首页# 创建JWT token，只存储用户名access_token = create_access_token(identity=username)# 设置JWT到cookie并重定向到主页response = redirect(url_for('index'))set_access_cookies(response, access_token,# max_age=60 * 60 * 24 * 7  # 7天有效期max_age=datetime.timedelta(days=2))return response2. 获取cookies# 获取当前会话中的身份信息info = get_jwt_identity()return render_template('index.html', info=info)3. 设置cookies会话有效期max_age=datetime.timedelta(hours=2),  # 设置会话有效期时间# max_age=60 * 60 * 24 * 2,4. 删除cookies# 注销用户并删除JWT cookiesresponse = redirect(url_for('login'))unset_jwt_cookies(response)return response5. response创建对象的方法:导包:from flask import make_response, Response# 1. response = make_response(redirect(url_for('test_blue.login_index')))# 2. response = make_response(render_template('test/home.html'), 200)# 3. response = make_response("success", 201)# 这种就可以# 4. response = redirect(url_for('login'))"""

 

 

 

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2. 验证

''' 验证 '''
'''
# 1. 重新改写这个方法
# def jwt_required(
#         optional: bool = False, fresh: bool = False,
#         refresh: bool = False, locations: Optional[LocationType] = None,
#         verify_type: bool = True, skip_revocation_check: bool = False, ) -> Any:
#     def wrapper(fn):
#         @wraps(fn)
#         def decorator(*args, **kwargs):
#             try:
#                 verify_jwt_in_request(
#                     optional, fresh, refresh, locations, verify_type, skip_revocation_check
#                 )
#                 return current_app.ensure_sync(fn)(*args, **kwargs)
#             except Exception as e:
#                 return redirect(url_for('login'))  # 没有身份信息时重定向到登录页
#
#         return decorator
#
#     return wrapper
#
''''''
2. 这种自定义的可以 重定向
# 自定义auth装饰器来检查JWT身份验证
# def auth(fn):
#     @wraps(fn)
#     def inner(*args, **kwargs):
#         try:
#             verify_jwt_in_request()  # 验证请求中是否存在有效的JWT
#             if not get_jwt_identity():  # 检查JWT中是否有身份信息
#                 return redirect(url_for('login'))  # 没有身份信息时重定向到登录页
#         except Exception as e:
#             print(e)
#             return redirect(url_for('login'))  # 捕获所有异常，重定向到登录页
#         return fn(*args, **kwargs)
#
#     return inner
''''''
# 3. @jwt_required()
#  直接在函数上装饰验证 只会抛异常 不能自动重定向# 4. 自定义auth装饰器来检查JWT身份验证
#  这种的验证 只会抛异常 不能自动重定向
# def auth(fn):
#     @wraps(fn)
#     @jwt_required()
#     def inner(*args, **kwargs):
#         if not get_jwt_identity():  # 检查JWT中是否有身份信息
#             return redirect(url_for('login'))  # 没有身份信息时重定向到登录页
#         return fn(*args, **kwargs)
# 
#     return inner
''''''
# 5. 在前端直接重定向
$.ajax({url: '/protected',method: 'GET',success: function(data) {// 处理成功的响应},error: function(jqXHR) {if (jqXHR.status === 401) {window.location.href = '/login';}}
});''''''
# 6. 设置存储在cookies 不然报错 以下是四种方式   可以都选 单选
app.config['JWT_TOKEN_LOCATION'] = ["cookies"]
# app.config['JWT_TOKEN_LOCATION'] = ["headers", "cookies", "query_string", "json"]'''

 

 

3. 代码

import datetime
import hashlibfrom flask import (Flask, render_template, redirect, url_for, request,session, make_response, Response, current_app
)
from functools import wraps
from flask_jwt_extended import (JWTManager, create_access_token, set_access_cookies,get_jwt_identity, unset_jwt_cookies,jwt_required,verify_jwt_in_request,
)from typing import Optional, Any
from flask_jwt_extended.view_decorators import LocationTypeapp = Flask(__name__)
app.secret_key = "ghakjhkghkahkhgkhalkfdngkasnkglhaj".encode('utf-8')app.config['JWT_TOKEN_LOCATION'] = ["cookies"]jwt = JWTManager(app)  # 初始化JWTManager@app.route('/')
@app.route('/index', methods=["GET", "POST"])
# @auth  # 使用auth装饰器
@jwt_required()
def index():# 获取当前会话中的身份信息info = get_jwt_identity()return render_template('index.html', info=info)@app.route('/login', methods=["GET", "POST"])
def login():if request.method == "POST":username = request.form.get('username', None)password = request.form.get('password', None)confirm_password = request.form.get('confirm_password', None)# 表单验证逻辑if not username or not password or not confirm_password:return render_template('login.html', errors="所有字段不能为空")if password != confirm_password:return render_template('login.html', errors="密码不一致")# 假设用户名和密码验证成功if username == "root" and password == "123":# 创建JWT token，只存储用户名access_token = create_access_token(identity=username)# 设置JWT到cookie并重定向到主页response = redirect(url_for('index'))set_access_cookies(response, access_token,# max_age=60 * 60 * 24 * 7  # 7天有效期max_age=datetime.timedelta(days=2))return responseelse:return render_template('login.html', errors="账号或密码有误")return render_template('login.html')@app.route('/logout', methods=["GET", "POST"])
# @auth
@jwt_required()
def logout():# 注销用户并删除JWT cookiesresponse = redirect(url_for('login'))unset_jwt_cookies(response)return response@app.route('/test')
# @auth
@jwt_required()
def test():return "测试成功"if __name__ == '__main__':app.run(debug=True)