python 使用flask_httpauth和pyjwt实现登录权限控制

最近需要用到，学习了一下记录

首先安装依赖

bash 复制代码

pip install Flask-HTTPAuth pyjwt passlib

Welcome to Flask-HTTPAuth's documentation! --- Flask-HTTPAuth documentation

Welcome to PyJWT --- PyJWT 2.8.0 documentation

Passlib 1.7.4 documentation --- Passlib v1.7.4 Documentation

实现验证token的方法，

python 复制代码

from dependency_injector.wiring import inject, Provide
from flask_httpauth import HTTPTokenAuth 
import jwt
from flask import current_app

auth_provider = HTTPTokenAuth(scheme='Bearer')

@auth_provider.verify_token
def verify_token(token):  
    try:  
            payload = jwt.decode(token, self.secret_key, algorithms=[self.algorithm])  
            username=payload['username']
            try:
               user = self.user_repository.get_by_name(username)
            except EntityNotFoundError:
                current_app.logger.error(f'====== Login user not found, name : "+{username} ======')
                return False  
            else:
                return user
        except jwt.exceptions.DecodeError as e:  
            current_app.logger.error('====== Decode JWT Failed ======')
            return False  
        except jwt.exceptions.ExpiredSignatureError:  
            current_app.logger.error('====== JWT Already Expired ======')
            return False

这样的话，只需要引入之前定义的auth_provider，然后在需要登录之后才能访问的api上加入@auth_provider.login_required，当然auth_provider这个变量名是自己取的，你怎么定义的就用什么就行了。这样的话访问该api的时候就会自动去拿jwt验证。

访问的时候需要在headers放Authorization为key，然后Bearer+token为value，Bearer这个指定是在定义auth_provider = HTTPTokenAuth(scheme='Bearer')指定的。

登录的方法可以看到，验证密码之后就会生成jwt返回，前端接到这个jwt之后，就会放在之后的请求内

python 复制代码

from flask import  Blueprint, jsonify, request,current_app
from dependency_injector.wiring import inject, Provide
from main.containers import Container
from main.security.jwt_filter import auth_provider
import datetime
from passlib.apps import custom_app_context as pwd_context

auth_bp=Blueprint('auth',__name__)

@auth_bp.route('/login', methods=['POST'])
def login():
    data = request.get_json()  
    username = data.get('username', None)  
    password = data.get('password', None)  
    if not username or not password:  
        current_app.logger.error(f'Login failed with missing username or password')
        return jsonify({'error': 'Missing username or password'}), 400  
    try:
       user=self.user_repository.get_by_name(username,session)
    except EntityNotFoundError:
       current_app.logger.error(f'====== Login user not found, name : "+{username} ======')
       return jsonify({'error': 'User does not exist'}), 401     
    if pwd_context.verify(password, user.password):  
           jwt = self._generate_token(user.user_id, username)
           return jsonify({'token': jwt}), 200  
    else:  
           current_app.logger.error(f'{username} login failed.')
           return jsonify({'error': 'Username and password does not match'}), 401   

@auth_bp.route('/account', methods=['GET'])
@auth_provider.login_required
def account():
    return auth_provider.current_user().to_response(),200


def _generate_token(self, user_id, username)->any:
        expire_time = datetime.datetime.now(datetime.UTC) + datetime.timedelta(minutes=self.access_token_expire_minutes)  
          
        payload = {  
            'exp': expire_time,  #失效时间
            'iat': datetime.datetime.now(datetime.UTC),  #生效时间
            'sub': user_id,   
            'username': username 
        }  
        token = jwt.encode(payload, 'A05qYNxO/ka9lzjtB5WVJ6li/KHM91fMMT+4Wm6xRBKMivll2kMmR+cJWyEE0bh4PcwI/9LUwwlzZ0pjkFepTg==', algorithm='HS256')  
        return token

jwt过期时间你可以根据需求自己定义

生成密码的方式在这里

python 复制代码

from passlib.apps import custom_app_context as pwd_context

TEST_USERS_ARRAY= [
    {
        "id": uuid.uuid1().hex,
        "username":"admin",
        "password": pwd_context.encrypt("admin")
    },
    {
        "id": uuid.uuid1().hex,
        "username":"user1",
        "password": pwd_context.encrypt("user1")
    }
]

python 复制代码

from flask import jsonify
from sqlalchemy import Column, String

from main.db_access.domain.common_entity import CommonEntity



class User(CommonEntity):
    __tablename__ = "TBL_AA_USER"

    user_id = Column(String, primary_key=True)
    username = Column(String)
    password = Column(String)
    
    def __init__(self,user_id,username,password):
        self.user_id=user_id
        self.username=username
        self.password=password

    def to_dict(self):
        return {'user_id':self.user_id,'username':self.username}
    
    def to_response(self):  
        data = self.to_dict()  
        response = jsonify(data)  
        response.headers['Content-Type'] = 'application/json'  
        return response