node.js - Google Calendar API - 如何使用 NodeJS REST API 插入新事件

Question

我想将数据发送到我的 NodeJS 后端（Express 框架），然后使用 Google Calendar API 在 Google Calendar 上创建一个事件。

我正在使用来自 express.Router() 的 POST 方法接收数据

此时，如果我使用 Postman 发送请求，则会收到错误消息：“联系日历服务时出错：错误：需要登录”

我的问题是如何在 post 方法体内调用 insertEvent() 方法并传递从用户接收到的数据？

这篇文章将事件插入谷歌日历 nodejs中描述了类似的情况，但数据是硬编码的。

我的完整代码是：

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

const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');

const myEvents = [];

// If modifying these scopes, delete token.json.
const SCOPES = ['https://www.googleapis.com/auth/calendar'];
// The file token.json stores the user's access and refresh tokens, and is
// created automatically when the authorization flow completes for the first
// time.
const TOKEN_PATH = 'token.json';

// Load client secrets from a local file.
fs.readFile('credentials.json', (err, content) => {
  if (err) return console.log('Error loading client secret file:', err);
  // Authorize a client with credentials, then call the Google Calendar API.
  authorize(JSON.parse(content), listEvents);
  authorize(JSON.parse(content), insertEvents);
});

/**
 * Create an OAuth2 client with the given credentials, and then execute the
 * given callback function.
 * @param {Object} credentials The authorization client credentials.
 * @param {function} callback The callback to call with the authorized client.
 */
function authorize(credentials, callback) {
  const {client_secret, client_id, redirect_uris} = credentials.installed;
  const oAuth2Client = new google.auth.OAuth2(
      client_id, client_secret, redirect_uris[0]);

  // Check if we have previously stored a token.
  fs.readFile(TOKEN_PATH, (err, token) => {
    if (err) return getAccessToken(oAuth2Client, callback);
    oAuth2Client.setCredentials(JSON.parse(token));
    callback(oAuth2Client);
  });
}

/**
 * Get and store new token after prompting for user authorization, and then
 * execute the given callback with the authorized OAuth2 client.
 * @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for.
 * @param {getEventsCallback} callback The callback for the authorized client.
 */
function getAccessToken(oAuth2Client, callback) {
  const authUrl = oAuth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: SCOPES,
  });
  console.log('Authorize this app by visiting this url:', authUrl);
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });
  rl.question('Enter the code from that page here: ', (code) => {
    rl.close();
    oAuth2Client.getToken(code, (err, token) => {
      if (err) return console.error('Error retrieving access token', err);
      oAuth2Client.setCredentials(token);
      // Store the token to disk for later program executions
      fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
        if (err) return console.error(err);
        console.log('Token stored to', TOKEN_PATH);
      });
      callback(oAuth2Client);
    });
  });
}

/**
 * Lists the next 10 events on the user's primary calendar.
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listEvents(auth) {
  const calendar = google.calendar({version: 'v3', auth});
  calendar.events.list({
    calendarId: 'primary',
    timeMin: (new Date()).toISOString(),
    maxResults: 10,
    singleEvents: true,
    orderBy: 'startTime',
  }, (err, res) => {
    if (err) return console.log('The API returned an error: ' + err);
    const events = res.data.items;
    if (events.length) {
      myEvents.push(events);
    } else {
      console.log('No upcoming events found.');
    }
  });
}


function insertEvents(event, auth) {
  const calendar = google.calendar({ version: 'v3', auth });
  var event = event;
  calendar.events.insert(
    {
      auth: auth,
      calendarId: 'primary',
      resource: event
    },
    function(err, event) {
      if (err) {
        console.log(
          'There was an error contacting the Calendar service: ' + err
        );
        return;
      }
      console.log('Event created: %s', event.data.htmlLink);
    }
  );
}


/* GET events listing. */
router.get('/', function(req, res, next) {
  res.send(myEvents);
});

/* Create a new event. */
router.post('/add', function(req, res, next){
  let newEvent = req.body;
  insertEvents(newEvent, auth); //how to pass req.body and auth?
  res.send('Ok');
});

module.exports = router;

标签： node.jsexpressgoogle-calendar-api

Answer 1

首先，您需要将每个用户的 refresh_token 保存在 db 中，以便在将来使用时连接到 google-calendar

const secrets = {
  client_id: process.env.CLIENT_ID,
  client_secret: process.env.CLIENT_SECRET,
  redirect_uris: process.env.REDIRECT_URIS,
};

const scope = ['https://www.googleapis.com/auth/calendar'];

const {
  client_id,
  client_secret,
  redirect_uris
} = secrets;

const oAuth2Client = new google.auth.OAuth2(client_id, client_secret, redirect_uris);

// 在 req.body 中传递 userId 和 newEvent 对象

router.post('/add', async (req, res, next)=>{
  const {id,newEvent} = req.body;

  //find User RefreshToken Using id from db
  //something like below
  const {refresh_token} = await db.user.findById(id)

  oAuth2Client.setCredentials({refresh_token});

  await calendar.events.insert({
      calendarId:'primary',
      resource: newEvent
    })
  res.send('Ok');
});