Flask实现token认证

1. 安装

pip install flask_httpauth
pip install itsdangerous

2. 创建对象

from flask import Flask, g, jsonify
from flask_httpauth import HTTPBasicAuth


app = Flask(__name__)
auth = HTTPBasicAuth()

3. 生成token

from itsdangerous import TimedJSONWebSignatureSerializer as Serializer

# 密钥，可随意修改
SECRET_KEY = 'abcdefghijklmm'
# 生成token, 有效时间为600min
def generate_auth_token(user_id, expiration=36000):
    # 第一个参数是内部私钥
    # 第二个参数是有效期（秒）
    s = Serializer(SECRET_KEY, expires_in=expiration)
    return s.dumps({'user_code': user_code})

4. 解析token

from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
from itsdangerous import BadSignature, SignatureExpired


# 密钥，可随意修改
SECRET_KEY = 'abcdefghijklmm'
# 解析token
def verify_auth_token(token):
    s = Serializer(SECRET_KEY)
    # token正确
    try:
        data = s.loads(token)
        return data
    # token过期
    except SignatureExpired:
        return None
    # token错误
    except BadSignature:
        return None

5. 验证token

# 数据库配置
db = {
        'host': '127.0.0.1',
        'user': 'root',
        'password': 'admin123',
        'port': 3306,
        'database': 'school',
        'charset': 'utf8'
}


# 连接数据库操作
def connect(user_id, password):
    conn = mc.connect(**db)
    cursor = conn.cursor(dictionary=True)
    args = (user_id, password)
    verify_sql = "SELECT user_id FROM account WHERE user_id = %s AND pwd = PASSWORD(%s);"
    cursor.execute(verify_sql, args)
    user = cursor.fetchone()
    return user


# 验证token
@auth.verify_password
def verify_password(username, password):
    # 先验证token
    user_id = re.sub(r'^"|"$', '', username)
    user_id = verify_auth_token(user_id)
    # 如果token不存在，验证用户id与密码是否匹配
    if not user_id:
        user_id = connect(username, password)
        # 如果用户id与密码对应不上，返回False
        if not user_id:
            return False
    g.user_id = user_id.get('user_id')
    return True

6. 完整代码

配置文件config.py

# 数据库配置
db = {
        'host': '127.0.0.1',
        'user': 'root',
        'password': 'admin123',
        'port': 3306,
        'database': 'school',
        'charset': 'utf8'
}

# 密钥，可随意修改
SECRET_KEY = 'abcdefghijklmm'

主文件run.py

from flask import Flask, g, jsonify
from flask_httpauth import HTTPBasicAuth
from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
from itsdangerous import BadSignature, SignatureExpired
from flask_cors import CORS
import mysql.connector as mc
from config import db, SECRET_KEY
import re


app = Flask(__name__)
CORS(app, supports_credentials=True)
auth = HTTPBasicAuth()


# 生成token, 有效时间为600min
def generate_auth_token(user_id, expiration=36000):
    s = Serializer(SECRET_KEY, expires_in=expiration)
    return s.dumps({'user_id': user_id})


# 解析token
def verify_auth_token(token):
    s = Serializer(SECRET_KEY)
    # token正确
    try:
        data = s.loads(token)
        return data
    # token过期
    except SignatureExpired:
        return None
    # token错误
    except BadSignature:
        return None


# 连接数据库操作
def connect(user_id, password):
    conn = mc.connect(**db)
    cursor = conn.cursor(dictionary=True)
    args = (user_id, password)
    verify_sql = "SELECT user_id FROM account WHERE user_id = %s AND pwd = PASSWORD(%s);"
    cursor.execute(verify_sql, args)
    user = cursor.fetchone()
    return user


# 验证token
@auth.verify_password
def verify_password(username, password):
    # 先验证token
    user_id = re.sub(r'^"|"$', '', username)
    user_id = verify_auth_token(user_id)
    # 如果token不存在，验证用户id与密码是否匹配
    if not user_id:
        user_id = connect(username, password)
        # 如果用户id与密码对应不上，返回False
        if not user_id:
            return False
    g.user_id = user_id.get('user_id')
    return True


@app.route('/login')
@auth.login_required
def login():
    token = generate_auth_token(g.user_id)
    return jsonify({'token': token})


@app.route('/index')
@auth.login_required
def index():
    return 'index'


if __name__ == '__main__':
    app.run()

只需要在需要登录验证请求下添加装饰器@auth.login_required即可