SyntaxError: Unexpected token l in JSON at position

Question

为什么每次使用 api (POST)

时都会出现此错误

SyntaxError：JSON 中位置 18 的意外标记 l 在 JSON.parse（<匿名>）在解析 (/Users/.../Desktop/ecommerceapi/node_modules/body-parser/lib/types/json.js:89:19) 在 /Users/.../Desktop/ecommerceapi/node_modules/body-parser/lib/read.js:121:18 在 invokeCallback (/Users/.../Desktop/ecommerceapi/node_modules/raw-body/index.js:224:16) 完成 (/Users/.../Desktop/ecommerceapi/node_modules/raw-body/index.js:213:7) 在 IncomingMessage.onEnd (/Users/.../Desktop/ecommerceapi/node_modules/raw-body/index.js:273:7) 在 IncomingMessage.emit（节点：事件：532:35）在 endReadableNT（节点：internal/streams/readable:1346:12）在 processTicksAndRejections（节点：internal/process/task_queues:83:21）

这是我的全部代码：(auth.js)

const router = require("express").Router();
const User = require("../models/User");
const CryptoJS = require("crypto-js");
const jwt = require("jsonwebtoken");

//REGISTER
router.post("/register", async (req, res) => {
  const newUser = new User({
    username: req.body.username,
    email: req.body.email,
    password: CryptoJS.AES.encrypt(
      req.body.password,
      process.env.PASS_SEC
    ).toString(),
  });

  try {
    const savedUser = await newUser.save();
    res.status(201).json(savedUser);
  } catch (err) {
    res.status(500).json(err);
  }
});

//LOGIN

router.post('/login', async (req, res) => {
    try{
        const user = await User.findOne(
            {
                userName: req.body.user_name
            }
        );

        !user && res.status(401).json("Wrong User Name");

        const hashedPassword = CryptoJS.AES.decrypt(
            user.password,
            process.env.PASS_SEC
        );


        const originalPassword = hashedPassword.toString(CryptoJS.enc.Utf8);

        const inputPassword = req.body.password;
        
        originalPassword != inputPassword && 
            res.status(401).json("Wrong Password");

        const accessToken = jwt.sign(
        {
            id: user._id,
            isAdmin: user.isAdmin,
        },
        process.env.JWT_SEC,
            {expiresIn:"3d"}
        );
  
        const { password, ...others } = user._doc;  
        res.status(200).json({...others, accessToken});

    }catch(err){
        res.status(500).json(err);
    }

});

module.exports = router;

我正在使用 Postman 来使用 API 到 POST 这个

{ "username": sultan "password": 12345qwer }

这是 index.js:

const express = require("express");
const app = express();
mongoose = require("mongoose")
const dotenv = require("dotenv");
const userRoute = require("./routes/user");
const authRoute = require("./routes/auth");

dotenv.config();

mongoose
.connect(process.env.MONGO_URL)
.then(() => console.log("DB Connection Successfull!"))
.catch((err) => {
    console.log(err);
});

app.use(express.json());
app.use("/api/auth", authRoute);
app.use("/api/users", userRoute);

app.listen(process.env.PORT || 50, () => {
    console.log("Backend server is running!");
});

它应该给我用户信息或“密码错误”，但它给出了上述错误作为响应！

Answer 1

缺少双引号和逗号 { “用户名”：“苏丹”， “密码”：“12345 qwer” }

SyntaxError: Unexpected token l in JSON at position

SyntaxError: Unexpected token l in JSON at position

json

mongodb

react-native

mongoose

postman