多次请求删除和获取节点

Question

我正在使用请求库对本地托管的 API（MailDev 客户端）进行休息调用

分别运行各个组件时，我可以删除、发送和阅读电子邮件。但是，当我一起运行它时，我只能删除和发送。 Get 请求总是返回一个空响应。

var http = require('http');
var request = require('request');
var nodemailer = require('nodemailer');

var urlStr = 'http://localhost:1080/email/all'
var options = {
    url: urlStr,
    method: 'DELETE'
};


request.del('http://localhost:1080/email/all')

var transporter = nodemailer.createTransport({
 port: 1025,
 ignoreTLS: true,
});

const mailOptions = {
  from: 'email1@googlemail.com', // sender address
  to: 'email2@yahoo.com', // list of receivers
  subject: 'Hello world', // Subject line
  html: '<p>Hello world, stay happy :)</p>'// plain text body
};

transporter.sendMail(mailOptions, function (err, info) {
   if(err)
     console.log(err)
   else
      console.log();
});

console.log("getting emails");


request('http://localhost:1080/email/',function(err,res,body){
  if(err){console.log(err);}
  console.log(body);
});

任何想法为什么 get 请求只能单独工作？

谢谢

Answer 1

您正在做的是几乎同时触发所有请求。不能保证哪个请求将首先完成，因此您调用它们的顺序并不能保证它们将以相同的顺序执行。试试这个：

var http = require('http');
var request = require('request');
var nodemailer = require('nodemailer');

var urlStr = 'http://localhost:1080/email/all'
var options = {
    url: urlStr,
    method: 'DELETE'
};

var transporter = nodemailer.createTransport({
 port: 1025,
 ignoreTLS: true,
});

const mailOptions = {
  from: 'email1@googlemail.com', // sender address
  to: 'email2@yahoo.com', // list of receivers
  subject: 'Hello world', // Subject line
  html: '<p>Hello world, stay happy :)</p>'// plain text body
};

deleteEmails(function(){
  sendMail(mailOptions, function(){
    getEmails(function(res, body){
      console.log(body);
    })
  })
})

function deleteEmails(successCallback){
  request.del('http://localhost:1080/email/all', function (err){
    if(err)
      console.log(err)
    else if(successCallback) {
      successCallback()
    }
  })
}

function sendMail(mailOptions, successCallback){
  transporter.sendMail(mailOptions, function (err, info) {
    if(err)
      console.log(err)
    else if(successCallback) {
      successCallback()
    }
  });
}

function getEmails(successCallback){
  console.log("getting emails");
  request('http://localhost:1080/email/',function(err,res,body){
    if(err){
      console.log(err);
    } else {
      successCallback(res, body)
    }
  });
}