运行Heroku的URL时如何解决postman的“未指定名称”错误| NodeJs | MongoDB

【问题标题】：How to resolve "unspecified name" error of postman when running URL of Heroku | NodeJs | MongoDB运行Heroku的URL时如何解决postman的“未指定名称”错误| NodeJs | MongoDB
【发布时间】：2021-08-13 08:33:22
【问题描述】：

我是 Heroku、NodeJS 和 MongoDB 的新手。我在 Flutter 中创建了一个登录表单，它的后端在 NodeJS 和 MongoDB 中。我使用 Heroku 将后端连接到颤振，但是当我在邮递员上运行 URL（由 Heroku 在构建项目时给出）时，它给了我“未指定的名称”

这是我的 app.js 的代码

var body = require('body-parser');
const mongoose = require('mongoose');
var mongodb = require('mongodb')
var url = 'mongodb://localhost:27017/Mongodb'
var express = require('express');
var app = express();
app.use(body.json());
var bcrypt = require('bcrypt');
var CryptoJS = require("crypto-js")
var jwt = require('jsonwebtoken');
const router= express.Router()
const User = require('./connection');
mongoose.connect('mongodb://localhost:27017/Mongodb', { useUnifiedTopology: true, useNewUrlParser: true },function(err){
  if(err){
    console.log(err)
  }else{
    console.log("connection Successful")
  }
})


// router.get('/Dashboard', (req, res) => {
//   res.send('Hello World')
// })

function checkToken(req,res,result){
  const header= req.headers.token;
  if(typeof header !== 'undefined'){
    const bearer =header.split('.');
    const token = bearer[1]
    //console.log(token)
    req.token = token 
    //next();
    result();
  }else
  res.json("Error")
  }  

const login = require('./routes/login')
app.post("/login", async (req, res, next) => {
  console.log("login api hit")
  login(req,res,next)
  } )  

const userDashboard = require('./routes/userdashboard')
app.post("/Dashboard",checkToken,(req,res)=>  {
  userDashboard(req,res);
}) 

const PORT = process.env.PORT || 5000
  app.listen(PORT, function(){
 
    console.log("Server is running")
    
  })

这里是 ./routes/login

的代码 
var body = require('body-parser');
const mongoose = require('mongoose');
var mongodb = require('mongodb')
var url = 'mongodb://localhost:27017/Mongodb'
var express = require('express');
var app = express();
app.use(body.json());
const User = require('../connection');
var bcrypt = require('bcrypt');
var CryptoJS = require("crypto-js")
var jwt = require('jsonwebtoken');

login=(req,res,next)=>{  
  console.log(req.data)
  User.find({"username":req.body.username},function(err,data){
    if(err){
      console.log("unspecified name")
      res.status(400).json("unspecified name")
      return;
    } 
    else{
    console.log(data.length)
         if(data.length<=0)
      {
        res.status(300).json({
          "message":"Invalid Input!"
        })  
      }
      else {
           
        //bcrypt.compare(req.body.password,data[0].password).then(function(result) {
          var bytes = CryptoJS.AES.decrypt(data[0].password, 'my-secret-key@123');
          var decryptedData = JSON.parse(bytes.toString(CryptoJS.enc.Utf8));
          console.log(decryptedData)
            if (req.body.password==decryptedData)
              {
                login = "Succesful";            
                var token = jwt.sign({
                  data: 'foobar'
           }, 'secret', { expiresIn: "2 minute"})
           res.status(200).json({auth: true,  AccessToken:token,  User:data[0]}) 
          }
           else
           {res.status(300).json({
            "message":"Input!"
          })}
          
          //  });
          
        }}
      })
}
module.exports = login;

这是显示“login api hit”

的快照

这是显示“服务器正在运行”的快照

这里是404错误和400错误

这是邮递员快照

现在请告诉我我的服务器是否正常运行？看来是！但是为什么它在邮递员上显示 "unspecified name" ？ 请帮助我是这方面的新手，任何帮助将不胜感激！

谢谢！

---------------已编辑帖子--------------- ------------------------

我的数据库数据是这样的

但是 cmd 屏幕显示这个

谁能告诉我这背后的逻辑是什么？这些是从哪里来的？

----------已编辑帖子------ ---------------------------------------

这是我输入凭据时的输出！

这里是 cmd 的输出

2021-05-25T11:04:30.507933+00:00 app[web.1]: Server is running
2021-05-25T11:04:30.682233+00:00 heroku[web.1]: State changed from starting to up
2021-05-25T11:05:00.561298+00:00 app[web.1]: MongooseServerSelectionError: Could not connect to any servers in your MongoDB Atlas cluster. One common reason is that you're trying to access the database from an IP that isn't whitelisted. Make sure your current IP address is on your Atlas cluster's IP whitelist: https://docs.atlas.mongodb.com/security-whitelist/
2021-05-25T11:05:00.561320+00:00 app[web.1]: at NativeConnection.Connection.openUri (/app/node_modules/mongoose/lib/connection.js:832:32)
2021-05-25T11:05:00.561321+00:00 app[web.1]: at /app/node_modules/mongoose/lib/index.js:345:10
2021-05-25T11:05:00.561335+00:00 app[web.1]: at promiseOrCallback (/app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:9:12)
2021-05-25T11:05:00.561341+00:00 app[web.1]: at Mongoose._promiseOrCallback (/app/node_modules/mongoose/lib/index.js:1135:10)
2021-05-25T11:05:00.561342+00:00 app[web.1]: at Mongoose.connect (/app/node_modules/mongoose/lib/index.js:344:20)
2021-05-25T11:05:00.561343+00:00 app[web.1]: at Object.<anonymous> (/app/app.js:13:10)
2021-05-25T11:05:00.561343+00:00 app[web.1]: at Module._compile (internal/modules/cjs/loader.js:1068:30)
2021-05-25T11:05:00.561344+00:00 app[web.1]: at Object.Module._extensions..js (internal/modules/cjs/loader.js:1097:10)
2021-05-25T11:05:00.561344+00:00 app[web.1]: at Module.load (internal/modules/cjs/loader.js:933:32)
2021-05-25T11:05:00.561344+00:00 app[web.1]: at Function.Module._load (internal/modules/cjs/loader.js:774:14)
2021-05-25T11:05:00.561345+00:00 app[web.1]: at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
2021-05-25T11:05:00.561345+00:00 app[web.1]: at internal/main/run_main_module.js:17:47 {
2021-05-25T11:05:00.561346+00:00 app[web.1]: reason: TopologyDescription {
2021-05-25T11:05:00.561346+00:00 app[web.1]: type: 'ReplicaSetNoPrimary',
2021-05-25T11:05:00.561346+00:00 app[web.1]: setName: null,
2021-05-25T11:05:00.561347+00:00 app[web.1]: maxSetVersion: null,
2021-05-25T11:05:00.561347+00:00 app[web.1]: maxElectionId: null,
2021-05-25T11:05:00.561348+00:00 app[web.1]: servers: Map(3) {
2021-05-25T11:05:00.561348+00:00 app[web.1]: 'cluster0-shard-00-02.ocarv.mongodb.net:27017' => [ServerDescription],
2021-05-25T11:05:00.561348+00:00 app[web.1]: 'cluster0-shard-00-00.ocarv.mongodb.net:27017' => [ServerDescription],
2021-05-25T11:05:00.561349+00:00 app[web.1]: 'cluster0-shard-00-01.ocarv.mongodb.net:27017' => [ServerDescription]
2021-05-25T11:05:00.561350+00:00 app[web.1]: },
2021-05-25T11:05:00.561350+00:00 app[web.1]: stale: false,
2021-05-25T11:05:00.561350+00:00 app[web.1]: compatible: true,
2021-05-25T11:05:00.561350+00:00 app[web.1]: compatibilityError: null,
2021-05-25T11:05:00.561351+00:00 app[web.1]: logicalSessionTimeoutMinutes: null,
2021-05-25T11:05:00.561351+00:00 app[web.1]: heartbeatFrequencyMS: 10000,
2021-05-25T11:05:00.561351+00:00 app[web.1]: localThresholdMS: 15,
2021-05-25T11:05:00.561352+00:00 app[web.1]: commonWireVersion: null
2021-05-25T11:05:00.561352+00:00 app[web.1]: }
2021-05-25T11:05:00.561352+00:00 app[web.1]: }
2021-05-25T11:15:57.214740+00:00 app[web.1]: login api hit
2021-05-25T11:15:57.215001+00:00 app[web.1]: {}
2021-05-25T11:16:07.230564+00:00 app[web.1]: unspecified name
2021-05-25T11:16:07.247306+00:00 app[web.1]: /app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:19
2021-05-25T11:16:07.247307+00:00 app[web.1]: throw error;
2021-05-25T11:16:07.247308+00:00 app[web.1]: ^
2021-05-25T11:16:07.247308+00:00 app[web.1]:
2021-05-25T11:16:07.247309+00:00 app[web.1]: ReferenceError: print is not defined
2021-05-25T11:16:07.247310+00:00 app[web.1]: at /app/routes/login.js:19:7
2021-05-25T11:16:07.247310+00:00 app[web.1]: at /app/node_modules/mongoose/lib/model.js:4863:16
2021-05-25T11:16:07.247310+00:00 app[web.1]: at /app/node_modules/mongoose/lib/model.js:4863:16
2021-05-25T11:16:07.247311+00:00 app[web.1]: at /app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:16:11
2021-05-25T11:16:07.247311+00:00 app[web.1]: at /app/node_modules/mongoose/lib/model.js:4886:21
2021-05-25T11:16:07.247312+00:00 app[web.1]: at /app/node_modules/mongoose/lib/query.js:4389:18
2021-05-25T11:16:07.247312+00:00 app[web.1]: at /app/node_modules/mongoose/lib/query.js:4424:14
2021-05-25T11:16:07.247313+00:00 app[web.1]: at cb (/app/node_modules/mongoose/lib/query.js:1895:14)
2021-05-25T11:16:07.247313+00:00 app[web.1]: at /app/node_modules/mquery/lib/collection/node.js:27:21
2021-05-25T11:16:07.247314+00:00 app[web.1]: at collectionOperationCallback (/app/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:160:26)
2021-05-25T11:16:07.247323+00:00 app[web.1]: at Timeout.<anonymous> (/app/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:185:11)
2021-05-25T11:16:07.247323+00:00 app[web.1]: at listOnTimeout (internal/timers.js:555:17)
2021-05-25T11:16:07.247324+00:00 app[web.1]: at processTimers (internal/timers.js:498:7)
2021-05-25T11:16:07.247324+00:00 app[web.1]: Emitted 'error' event on Function instance at:
2021-05-25T11:16:07.247324+00:00 app[web.1]: at /app/node_modules/mongoose/lib/model.js:4865:13
2021-05-25T11:16:07.247325+00:00 app[web.1]: at /app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:16:11
2021-05-25T11:16:07.247325+00:00 app[web.1]: [... lines matching original stack trace ...]
2021-05-25T11:16:07.247326+00:00 app[web.1]: at processTimers (internal/timers.js:498:7)
2021-05-25T11:16:07.314225+00:00 heroku[web.1]: Process exited with status 1
2021-05-25T11:16:07.401592+00:00 heroku[web.1]: State changed from up to crashed
2021-05-25T11:16:07.409072+00:00 heroku[web.1]: State changed from crashed to starting
2021-05-25T11:16:07.240945+00:00 heroku[router]: at=info method=POST path="/login" host=attendance-demo.herokuapp.com request_id=ac9410a0-ac64-420b-b4d5-803aaa1a3fb2 fwd="111.88.134.32" dyno=web.1 connect=1ms service=10035ms status=400 bytes=234 protocol=https
2021-05-25T11:16:18.897092+00:00 heroku[web.1]: Starting process with command `node app`
2021-05-25T11:16:30.471917+00:00 heroku[web.1]: State changed from starting to up
2021-05-25T11:16:30.423428+00:00 app[web.1]: Server is running

这是我在按钮单击时调用的 authenticate.dart 文件

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';
class AuthService{
  Dio dio=new Dio();

  login(name,password)async{
    try{
      return await dio.post('https://attendance-demo.herokuapp.com/login',data: {
        "username":name,
        "password":password
      },options: Options(contentType:Headers.formUrlEncodedContentType)
      );
    }
    on DioError catch(e){
      Fluttertoast.showToast(msg: e.response.data['msg'],
      toastLength: Toast.LENGTH_SHORT,
      gravity: ToastGravity.BOTTOM,
      backgroundColor: Colors.red,
      textColor: Colors.white,
      fontSize: 16.0
      );
    }

  }
}

这是我创建的登录按钮代码并从身份验证类调用登录方法

  RoundedButton(text:"Login",  press: () {
                     AuthService().login(name,password).then((value){
                       if(value.data['success']){
                         token=value.data['token'];
                         Fluttertoast.showToast(msg: 'Authenticated',
                         toastLength: Toast.LENGTH_SHORT,
                        gravity: ToastGravity.BOTTOM,
                        backgroundColor: Colors.red,
                        textColor: Colors.white,
                        fontSize: 16.0);
                         
                       }

【问题讨论】：

  • login 函数定义在哪里？
  • 在 app.js 文件中，"app.post("/login", async (req, res, next) => { " 检查这一行
  • 这个代码require('./routes/login')在哪里？错误可能在那里。您正在调用login() 函数，但尚未在此处发布代码。
  • @RaulSauco 我编辑了我的帖子，发布了 login() 代码，请立即查看。
  • 在登录功能中，尝试控制台 req.body 而不是 req.data。连接 fn 看起来很可疑，请分享代码。

标签： node.js mongodb flutter heroku postman


【解决方案1】：

解决方案

所以，在花了很多时间之后，我终于找到了解决方案！问题是我的 Mongodb 已连接，问题是 IP 地址，所以感谢 stackoverflow 团队，我从 link（Aka 的解决方案）获得了解决方案，现在我已连接到我的数据库！

【讨论】：

    【解决方案2】：

    您的 mongodb 客户端正在您的本地计算机上运行，​​您必须创建一个云基础 mongodb 集群，例如 Atlas，并将您的 mongo URI 更改为云基础集群 URI。

    【讨论】：

    • 是的，你是对的！我这样做了，但我想问一件事，你能给我答案吗
    • 我认为您在控制台“未指定用户”是日志之后记录了您输入的凭据，而不是来自 db 的数据，我认为这是 db 查询后的日志。
    • 那我现在要做什么阿里？我再次编辑我的帖子，请检查它，当我输入凭据时！
    • 您的用户名和密码是存储在数据库中的“munib”，您尝试使用“munib123”作为密码。
    • 阿里请检查一下我现在编辑帖子，检查cmd的输出，我在用户名和密码上输入Munib
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