在API调用中获取无效的JSON

Question

I'm trying to use GoToMeeting's API and making a POST request to create a meeting. At the moment, I'm just trying to hardcode the body of the meeting and send headers but I'm receiving and I'm invalid JSON error and not sure why. Here's the code for that route:

app.post('/new-meeting', (req, res) => {

  const headers = {
    'Content-Type': 'application/json',
    Accept: 'application / json',
    Authorization: 'OAuth oauth_token=' + originalToken
  };

  console.log('-----------------------------------------------------------')
  console.log('Acess Token:');
  console.log('OAuth oauth_token=' + originalToken);
  console.log('-----------------------------------------------------------')

  const meetingBody = {
    subject: 'string',
    starttime: '2018-03-20T08:15:30-05:00',
    endtime: '2018-03-20T09:15:30-05:00',
    passwordrequired: true,
    conferencecallinfo: 'string',
    timezonekey: 'string',
    meetingtype: 'immediate'
  };

  return fetch('https://api.getgo.com/G2M/rest/meetings', {
    method: 'POST',
    body: meetingBody,
    headers: headers
  }).then(response => {

    console.log('response:');
    console.log(response);


    response
      .json()
      .then(json => {
        res.send(json);
        console.log(req.headers);
      })
      .catch(err => {
        console.log(err);
      });
  });
});

When I hit that router, I get the following error:

{
  "error": {
    "resource": "/rest/meetings",
    "message": "invalid json"
  }
}

Any advice would be appreciated!

Answer 1

tl;dr

You are passing fetch a value for the body represented by a JavaScript object. It is converting it to a string by (implicitly) calling its .toString() method. This doesn't give you JSON. The API you are calling then complains and tells you that it isn't JSON.

You need to convert your object to JSON using:

body: JSON.stringify(meetingBody), 

---

Test case

This demonstrates the problem and the solution.

Server

This is designed to be a very primitive and incomplete mock of GoToMeeting's API. It just echos back the request body.

const express = require("express");
var app = express();
var bodyParser = require('body-parser');

app.use(bodyParser.text({ type: "*/*" }));

app.post("/", (req, res) => {
    console.log(req.body);
    res.send(req.body)
});

app.listen(7070, () => console.log('Example app listening on port 7070!'))

Client

This represents your code, but with the Express server stripped out. Only the code relevant for sending the request to GoToMeeting's API is preserved.

const url = "http://localhost:7070/";
const fetch = require("node-fetch");

const headers = {
    'Content-Type': 'application/json',
    Accept: 'application / json',
    Authorization: 'OAuth oauth_token=foobarbaz'
};

const meetingBody = {
    subject: 'string',
    starttime: '2018-03-20T08:15:30-05:00',
    endtime: '2018-03-20T09:15:30-05:00',
    passwordrequired: true,
    conferencecallinfo: 'string',
    timezonekey: 'string',
    meetingtype: 'immediate'
};


fetch(url, {
        method: 'POST',
        body: meetingBody,
        headers: headers
    })
    .then(res => res.text())
    .then(body => console.log(body));

Results of running the test case

The logs of both server and client show:

[object Object] 

This is what you get when you call meetingBody.toString() .

If you change the code as described at the top of this answer, you get:

{"subject":"string","starttime":"2018-03-20T08:15:30-05:00","endtime":"2018-03-20T09:15:30-05:00","passwordrequired":true,"conferencecallinfo":"string","timezonekey":"string","meetingtype":"immediate"}

This is JSON, which is what the API is expecting.

---

Aside

MIME types do not have spaces in them. Accept: 'application / json', should be Accept: 'application/json', . This probably isn't causing you any problems though.

Answer 2

I believe the header is incorrect.

You need 'Accept: application/json' without space.