交换Google api中访问令牌的代码

问题描述

我正在使用https://developers.google.com/docs/api/quickstart/nodejs上提供的文档，以便使用Google Doc API开发node.js应用程序的工作示例。但是，在以下代码中：

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

// If modifying these scopes,delete token.json.
const SCOPES = ['https://www.googleapis.com/auth/documents.readonly'];
// 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 Docs API.
  authorize(JSON.parse(content),printDocTitle);
});

/**
 * 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,token) => {
    if (err) return getNewToken(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 getNewToken(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,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) console.error(err);
        console.log('Token stored to',TOKEN_PATH);
      });
      callback(oAuth2Client);
    });
  });
}

/**
 * Prints the title of a sample doc:
 * https://docs.google.com/document/d/195j9eDD3ccgjQRttHhJPymLJUCOUjs-jmwTrekvdjFE/edit
 * @param {google.auth.OAuth2} auth The authenticated Google OAuth 2.0 client.
 */
function printDocTitle(auth) {
  const docs = google.docs({version: 'v1',auth});
  docs.documents.get({
    documentId: '195j9eDD3ccgjQRttHhJPymLJUCOUjs-jmwTrekvdjFE',},res) => {
    if (err) return console.log('The API returned an error: ' + err);
    console.log(`The title of the document is: ${res.data.title}`);
  });
}

在显示const rl = readline.createInterface({并使用r1促使用户通过用户输入输入代码的部分，有一种方法可以更改此代码，从而无需用户输入，并且代码是自动的从网址中获取并用于交换访问令牌。

我已经进行了研究，但是还没有找到通过代码提取url内容的特定方法（通常会有一个带有url的请求对象，但这在Google文档中不存在）。 / p>

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

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