在响应回调函数中定义的Express Route不起作用

问题描述

我在回调响应函数中定义了一条路由。但是当我访问此路由时，如果我在函数之外定义了此路由，则express js会给出404找不到错误，而不是它起作用。我的旧项目可以按照这种逻辑正常工作，但是新项目却无法正常工作。

IDE：Webstorm 2020.1.1

以下是我的代码

www.js（启动脚本）

#!/usr/bin/env node

/**
 * Module dependencies.
 */

let app = require('../src/app');
let debug = require('debug')('whatsapp-bsp:server');
let http = require('http');

/**
 * Get port from environment and store in Express.
 */

let port = normalizePort(process.env.PORT || '3000');
app.set('port',port);

/**
 * Create HTTP server.
 */

let server = http.createServer(app);

/**
 * Listen on provided port,on all network interfaces.
 */

server.listen(port);
server.on('error',onError);
server.on('listening',onListening);

/**
 * Normalize a port into a number,string,or false.
 */

function normalizePort(val) {
  let port = parseInt(val,10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  let bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  let addr = server.address();
  let bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}

app.js

let app = express();
let cookieParser = require('cookie-parser');
let logger = require('morgan');
const config = require('../config');

const port = config.PORT;
const PubSub = require('./pubsub');
const amqp = require('./amqp');


app.use("*",function (req,res,next) {
  console.log(req.method + " " + req.originalUrl);
  next();
});


app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(require('cors')(config.cors));

const indexRouter = require('./routes');
const myRouter = require('./routes/myRouter')

amqp.createChannel().then(async channel => {
  const pubsub = new PubSub(channel);
  app.use('/webhook',myRouter(pubsub)); // This Route Does not work
});
app.use('/',indexRouter);

// catch 404 and forward to error handler
app.use(function (req,next) {
  next(createError(404));
});

console.log("I'm listening on " + port);

module.exports = app;

myRouter.js

const express = require('express');
const router = express.Router();

module.exports = (pubsub) => {

  router.post('/:value',res) {
    if (!req.body) {
      res.json({ data: { success: false,error: 'Request Body Required!' } })
    }
    pubsub.publish({ ...req.body,extension: req.params.value },req.params.value)
      .catch(e => {
        console.log('Error Publishing Messaging!!',e);
        res.json({ data: { success: false,error: 'Error publishing!' } })
      })
    res.json({ data: { success: true,message: 'Published Successfully!' } })
  });
  return router;
}

解决方法

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