循环引用阻塞了jsonwebtoken.JSON.stringify的签名原因

Circular reference blocks jsonwebtoken.sign cause of JSON.stringify

本文关键字：stringify JSON 引用 jsonwebtoken 循环      更新时间：2023-09-26

我正在使用Express和Sequelize基于本教程进行基本的用户身份验证

当我想向用户签署令牌时，我得到一个错误，告诉我我正在尝试JSON.stringify()一个无法完成的循环引用。因此，抛出一个错误，我不能将令牌分配给用户。

或当我在数据库中找到我的用户时，我做了一些错误的事情，这使得循环引用或我只需要找到一个解决方案来打破我假设的循环引用。谁能告诉我是哪一个?

完整的错误是:

TypeError: Converting circular structure to JSON
    at Object.stringify (native)
    at toString (/Users/Desktop/express-jwt/node_modules/jws/lib/tostring.js:9:15)
    at jwsSecuredInput (/Users/Desktop/express-jwt/node_modules/jws/lib/sign-stream.js:12:34)
    at Object.jwsSign [as sign] (/Users/Desktop/express-jwt/node_modules/jws/lib/sign-stream.js:22:22)
    at Object.module.exports [as sign] (/Users/Desktop/express-jwt/node_modules/jsonwebtoken/sign.js:144:16)
    at Model.User.findOne.then.user (/Users/Desktop/express-jwt/server/index.js:69:27)
    at Model.tryCatcher (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/promise.js:510:31)
    at Promise._settlePromise (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/promise.js:567:18)
    at Promise._settlePromise0 (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/promise.js:612:10)
    at Promise._settlePromises (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/promise.js:691:18)
    at Async._drainQueue (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/async.js:138:16)
    at Async._drainQueues (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/async.js:148:10)
    at Immediate.Async.drainQueues (/Users/Desktop/express-jwt/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:574:20)
    at tryOnImmediate (timers.js:554:5)

我的服务器索引是:

const express = require(`express`);
const app = express();
const bodyParser = require(`body-parser`);
const morgan = require('morgan');
const jwt = require('jsonwebtoken'); // used to create, sign, and verify tokens
const config = require('./config'); // get our config file
const db = require(`./models`);
const User = global.db.User;
const port = process.env.PORT || 8080;
db.sequelize.sync().then(() => {
    console.log(`Express server listening on port ${port}`);
});
app.set('superSecret', config.secret);
app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());
app.use(morgan('dev'));
app.get('/', (req, res) => {
  res.send('Hello! The API is at http://localhost:' + port + '/api');
});
app.listen(port);
console.log('Magic happens at http://localhost:' + port);
app.get('/setup', (req, res) => {
  db.sequelize.sync().then(() => {
    return User.create({
      username: 'Kevin frafster',
      password: 'password',
      admin: true
    })
    .then(addedUser => {
      console.log(addedUser.get({
        plain: true
      }));
    })
    .catch(err => {
      res.json(err);
    });
  });
});
// API ROUTES -------------------
// get an instance of the router for api routes
const apiRoutes = express.Router();
apiRoutes.post('/authenticate', (req,res) => {
  User.findOne({
    where: {username: req.body.username}
  }).then(user => {
    if (!user) {
      res.json({ success: false, message: 'Authentication failed. User not found.'});
    }else{
      // console.log(user);
      if (user.password != req.body.password) {
        res.json({ success: false, message: 'Authentication failed. Wrong password.' })
      }else{
        const token = jwt.sign(user, app.get('superSecret'), {
          expiresIn: 60*60*24
        });
        res.json({
          succes: true,
          message: 'Enjoy your token!',
          token
        });
      }
    }
  }).catch(err => {
    res.status(500).json(err);
  })
});
// TODO: route to authenticate a user (POST http://localhost:8080/api/authenticate)
// TODO: route middleware to verify a token
// route to show a random message (GET http://localhost:8080/api/)
apiRoutes.get('/', (req, res) => {
  res.json({ message: 'Welcome to the coolest API on earth!' });
});
// route to return all users (GET http://localhost:8080/api/users)
apiRoutes.get('/users', (req, res) => {
  User.findAll({})
    .then(users => {
      res.json(users);
    })
    .catch(err => {
      res.json(err);
    });
});
// apply the routes to our application with the prefix /api
app.use('/api', apiRoutes);

好吧，答案完全是花生。

1)创建新对象并为其分配有效载荷

const payload = {username: user.username, password: user.password};

2)使用新对象为 分配token
const token = jwt.sign(payload, app.get('superSecret'), {
  expiresIn: 60*60*24
});
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