Node.js HTTP请求返回正文/消息为空

Question

I am trying to use this package https://www.npmjs.com/package/request to POST data and wait a response then post more data. But I am always getting body/msg as undefined and the code do not work for some reason.

I have this code in browser :

$.ajax("/login",{ /// here i am in https://255.255.255 /// I am obscuring the real host ip

 data:{
   username:"username",
    password: "password",
     autologin:"true"},

 method:"POST"

}).done(function(msg) {
      console.log( msg );
       /// another $.ajax request here
    }); 

Here I get msg as {success: true, redirectTo: "https://255.255.255"} and I get redirected. This works.

But, in node.js, this does not :

var request = require('request');

request({
    method: "POST",
     baseUrl: "https://255.255.255",
      uri: "/login",
form: { 
      username: "username",
     password: "password",
    autologin: "true"}},
function(body, msg, err){ console.log(body); console.log(msg); })

Body and msg, I get both empty. console.log(err) return null

/login is session based and it only supports application/x-www-form-urlencoded . Both seem to be sending the same type of data, everything identical. I do not get whats wrong there :/

I would appreciate any type of help. Thanks in advance

Edit : So I tried to use the proper callback arguments and I got this error : 403 Then I tried to use headers to simulate a broswer but I still get that error.

headers: {'user-agent': 'Mozilla/5.0'}
headers: {'user-agent': 'node.js'}

Answer 1

The format for the callback is (err,response,body); maybe that is why you are getting a empty body and response. You can refer here for details.

Answer 2

I think you are getting confused with Promise and non-promise request package. As per your example, $ajax returns Promiseified response and you directly get the data from the response of the ajax request. You are expecting that request package should also give you data directly, which is not correct.

Actually, you can solve your issue in two ways:

Sol. 1: Use proper callback function arguments and you must get data in the third argument of the callback function. Such as:

var request = require('request');

request({
    method: "POST",
    baseUrl: "https://255.255.255",
    uri: "/login",
    form: {
      username: "username",
      password: "password",
      autologin: "true"
    }
  },
  function (error, httpResponse, body) {
    if (error) {
      console.error(error);
    }
    console.log(httpResponse.statusCode);
    console.log(body);
  });

Sol. 2: Use request-promise NPM package (download it from here ) and get pomisified response. For example:

var request = require('request-promise');

const getData = async () => {
  return new Promise((resolve, reject) => {
    const options = {
      method: "POST",
      baseUrl: "https://255.255.255",
      uri: "/login",
      form: {
        username: "username",
        password: "password",
        autologin: "true",
        resolveWithFullResponse: true, // Returns full response. To get only data don't use this property or mark it false.
      }
    };

    // Get whole Response object.
    const response = await request(options);

    // Returns the Promise.Resolve or Reject based on response.
    if (response.statusCode < 200 || response.statusCode > 300) {
      const errorMsg = 'Error occurred while POSTing the request. Got status: ' + response.status;
      console.error(errorMsg);

      // Reject the promise. Should be caught.
      return reject(errorMsg);
    }

    const responseBody = response.body;
    console.log(responseBody);

    // Return the response.
    return resolve(responseBody);
  })
}

Above implementation will return a promise for the method getData() being called.

NOTE: The statement const response = await request(options); will return whole response object if resolveWithFullResponse: true, is used in the options JSON object. If you need only response body or data don't mention resolveWithFullResponse property in the options or assign value false to it. By default the value of resolveWithFullResponse is false.