YouTube API错误，Node.js var redirectUrl=credentials.installed.redirect_uris[0]； ^ TypeError:无法读取未定义的属性“0” at authorize（D:\Node.js\yt api\server.js:37:56） 在processClientSecrets（D:\Node.js\yt api\server.js:24:3） 在FSReqWrap.readFileAfterClose[完成时]（fs.js:511:3） var express=需要（“express”）； var server=express（）； var fs=require（'fs'） var readline=require（'readline'）； var{google}=require（'googleapis'）； var OAuth2=google.auth.OAuth2； server.use（express.static（'public'））； //如果修改这些作用域，请删除以前保存的凭据 //位于~/.credentials/youtube-nodejs-quickstart.json 变量作用域=['https://www.googleapis.com/auth/youtube.readonly']; var TOKEN_DIR=（process.env.HOME | | process.env.HOMEPATH|| process.env.USERPROFILE）+'/.credentials/'； var TOKEN_PATH=TOKEN_DIR+'youtube nodejs quickstart.json'； //从本地文件加载客户端机密。 fs.readFile（'client_secret.json'，函数processClientSecrets（err，content）{ 如果（错误）{ log（'加载客户端机密文件时出错：'+err）； 返回； } //使用加载的凭据授权客户端，然后调用YouTube API。 授权（JSON.parse（content），getChannel）； }); /** *使用给定的凭据创建OAuth2客户端，然后执行 *给定回调函数。 * *@param{Object}凭据授权客户端凭据。 *@param{function}回调使用授权客户端调用的回调。 */ 函数授权（凭据、回调）{ var clientSecret=credentials.installed.client\u secret； var clientId=credentials.installed.client\u id； var redirectUrl=credentials.installed.redirect_uris[0]； var oauth2Client=新的OAuth2（clientId、clientSecret、redirectUrl）； //检查我们以前是否存储过令牌。 fs.readFile（令牌\路径，函数（err，令牌）{ 如果（错误）{ getNewToken（oauth2Client，回调）； }否则{ oauth2Client.credentials=JSON.parse（令牌）； 回调（oauth2Client）； } }); } /** *提示用户授权后获取并存储新令牌，然后 *使用授权的OAuth2客户端执行给定的回调。 * *@param{google.auth.OAuth2}OAuth2客户端为OAuth2客户端获取令牌。 *@param{getEventsCallback}回调使用授权的 *客户。 */ 函数getNewToken（oauth2Client，回调）{ var authUrl=oauth2Client.generateAuthUrl({ 访问类型：“脱机”， 范围：范围 }); log（'通过访问此url授权此应用：'，authUrl）； var rl=readline.createInterface({ 输入：process.stdin， 输出：process.stdout }); rl.question（'在此处输入该页面的代码：'，函数（代码）{ rl.close（）； oauth2Client.getToken（代码、函数（错误、令牌）{ 如果（错误）{ log（'尝试检索访问令牌时出错'，err）； 返回； } oauth2Client.credentials=令牌； storeToken（token）； 回调（oauth2Client）； }); }); } /** *将令牌存储到磁盘，以便在以后的程序执行中使用。 * *@param{Object}标记要存储到磁盘的标记。 */ 函数storeToken（token）{ 试一试{ fs.mkdirSync（TOKEN_DIR）； }捕捉（错误）{ if（err.code！=“EEXIST”）{ 犯错误； } } fs.writeFile（TOKEN_PATH，JSON.stringify（TOKEN），（err）=>{ 如果（错误）抛出错误； console.log（'存储到'+Token_PATH'的令牌）； }); console.log（'存储到'+Token_PATH'的令牌）； } /** *列出最多10个文件的名称和ID。 * *@param{google.auth.OAuth2}对授权的OAuth2客户端进行身份验证。 */ 函数getChannel（auth）{ var service=google.youtube（'v3'）； service.channels.list({ auth:auth， 部分：“代码段、内容详细信息、统计信息”， forUsername:“谷歌开发者” }，函数（错误，响应）{ 如果（错误）{ log（'API返回错误：'+err）； 返回； } var通道=response.data.items； 如果（channels.length==0）{ console.log（'未找到通道'）； }否则{ console.log（'此频道的ID为%s。其标题为\'%s\'，并且'+ “它有%s个视图。”， 通道[0]。id， 频道[0]。snippet.title， 通道[0]。统计信息。视图计数）； } }); } var port=process.env.port | | 4001； 服务器。侦听（端口，（）=>{ log（`listing on port${port}`） })

怎么把它修好？oAuth2有一些问题？

您的

客户端\u secret.json

文件缺少

重定向\u URI的密钥

请参见下面的示例文件：

var express = require('express');
    var server = express();
    var fs = require('fs')
    var readline = require('readline');
    var {google} = require('googleapis');
    var OAuth2 = google.auth.OAuth2;

    server.use(express.static('public'));

    // If modifying these scopes, delete your previously saved credentials
    // at ~/.credentials/youtube-nodejs-quickstart.json
    var SCOPES = ['https://www.googleapis.com/auth/youtube.readonly'];
    var TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
        process.env.USERPROFILE) + '/.credentials/';
    var TOKEN_PATH = TOKEN_DIR + 'youtube-nodejs-quickstart.json';

    // Load client secrets from a local file.
    fs.readFile('client_secret.json', function processClientSecrets(err, content) {
      if (err) {
        console.log('Error loading client secret file: ' + err);
        return;
      }
      // Authorize a client with the loaded credentials, then call the YouTube API.
      authorize(JSON.parse(content), getChannel);
    });

    /**
     * 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) {
      var clientSecret = credentials.installed.client_secret;
      var clientId = credentials.installed.client_id;
      var redirectUrl = credentials.installed.redirect_uris[0];
      var oauth2Client = new OAuth2(clientId, clientSecret, redirectUrl);

      // Check if we have previously stored a token.
      fs.readFile(TOKEN_PATH, function(err, token) {
        if (err) {
          getNewToken(oauth2Client, callback);
        } else {
          oauth2Client.credentials = 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 to call with the authorized
     *     client.
     */
    function getNewToken(oauth2Client, callback) {
      var authUrl = oauth2Client.generateAuthUrl({
        access_type: 'offline',
        scope: SCOPES
      });
      console.log('Authorize this app by visiting this url: ', authUrl);
      var rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
      });
      rl.question('Enter the code from that page here: ', function(code) {
        rl.close();
        oauth2Client.getToken(code, function(err, token) {
          if (err) {
            console.log('Error while trying to retrieve access token', err);
            return;
          }
          oauth2Client.credentials = token;
          storeToken(token);
          callback(oauth2Client);
        });
      });
    }

    /**
     * Store token to disk be used in later program executions.
     *
     * @param {Object} token The token to store to disk.
     */
    function storeToken(token) {
      try {
        fs.mkdirSync(TOKEN_DIR);
      } catch (err) {
        if (err.code != 'EEXIST') {
          throw err;
        }
      }
      fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
        if (err) throw err;
        console.log('Token stored to ' + TOKEN_PATH);
      });
      console.log('Token stored to ' + TOKEN_PATH);
    }

    /**
     * Lists the names and IDs of up to 10 files.
     *
     * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
     */
    function getChannel(auth) {
      var service = google.youtube('v3');
      service.channels.list({
        auth: auth,
        part: 'snippet,contentDetails,statistics',
        forUsername: 'GoogleDevelopers'
      }, function(err, response) {
        if (err) {
          console.log('The API returned an error: ' + err);
          return;
        }
        var channels = response.data.items;
        if (channels.length == 0) {
          console.log('No channel found.');
        } else {
          console.log('This channel\'s ID is %s. Its title is \'%s\', and ' +
                      'it has %s views.',
                      channels[0].id,
                      channels[0].snippet.title,
                      channels[0].statistics.viewCount);
        }
      });
    }


    var port = process.env.port || 4001;

    server.listen(port, () => {
      console.log(`Listening on port ${port}`)
    })
var redirectUrl = credentials.installed.redirect_uris[0];
                                                           ^

    TypeError: Cannot read property '0' of undefined
        at authorize (D:\Node.js\yt-api\server.js:37:56)
        at processClientSecrets (D:\Node.js\yt-api\server.js:24:3)
        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)
var express = require('express');
    var server = express();
    var fs = require('fs')
    var readline = require('readline');
    var {google} = require('googleapis');
    var OAuth2 = google.auth.OAuth2;

    server.use(express.static('public'));

    // If modifying these scopes, delete your previously saved credentials
    // at ~/.credentials/youtube-nodejs-quickstart.json
    var SCOPES = ['https://www.googleapis.com/auth/youtube.readonly'];
    var TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
        process.env.USERPROFILE) + '/.credentials/';
    var TOKEN_PATH = TOKEN_DIR + 'youtube-nodejs-quickstart.json';

    // Load client secrets from a local file.
    fs.readFile('client_secret.json', function processClientSecrets(err, content) {
      if (err) {
        console.log('Error loading client secret file: ' + err);
        return;
      }
      // Authorize a client with the loaded credentials, then call the YouTube API.
      authorize(JSON.parse(content), getChannel);
    });

    /**
     * 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) {
      var clientSecret = credentials.installed.client_secret;
      var clientId = credentials.installed.client_id;
      var redirectUrl = credentials.installed.redirect_uris[0];
      var oauth2Client = new OAuth2(clientId, clientSecret, redirectUrl);

      // Check if we have previously stored a token.
      fs.readFile(TOKEN_PATH, function(err, token) {
        if (err) {
          getNewToken(oauth2Client, callback);
        } else {
          oauth2Client.credentials = 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 to call with the authorized
     *     client.
     */
    function getNewToken(oauth2Client, callback) {
      var authUrl = oauth2Client.generateAuthUrl({
        access_type: 'offline',
        scope: SCOPES
      });
      console.log('Authorize this app by visiting this url: ', authUrl);
      var rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
      });
      rl.question('Enter the code from that page here: ', function(code) {
        rl.close();
        oauth2Client.getToken(code, function(err, token) {
          if (err) {
            console.log('Error while trying to retrieve access token', err);
            return;
          }
          oauth2Client.credentials = token;
          storeToken(token);
          callback(oauth2Client);
        });
      });
    }

    /**
     * Store token to disk be used in later program executions.
     *
     * @param {Object} token The token to store to disk.
     */
    function storeToken(token) {
      try {
        fs.mkdirSync(TOKEN_DIR);
      } catch (err) {
        if (err.code != 'EEXIST') {
          throw err;
        }
      }
      fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
        if (err) throw err;
        console.log('Token stored to ' + TOKEN_PATH);
      });
      console.log('Token stored to ' + TOKEN_PATH);
    }

    /**
     * Lists the names and IDs of up to 10 files.
     *
     * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
     */
    function getChannel(auth) {
      var service = google.youtube('v3');
      service.channels.list({
        auth: auth,
        part: 'snippet,contentDetails,statistics',
        forUsername: 'GoogleDevelopers'
      }, function(err, response) {
        if (err) {
          console.log('The API returned an error: ' + err);
          return;
        }
        var channels = response.data.items;
        if (channels.length == 0) {
          console.log('No channel found.');
        } else {
          console.log('This channel\'s ID is %s. Its title is \'%s\', and ' +
                      'it has %s views.',
                      channels[0].id,
                      channels[0].snippet.title,
                      channels[0].statistics.viewCount);
        }
      });
    }


    var port = process.env.port || 4001;

    server.listen(port, () => {
      console.log(`Listening on port ${port}`)
    })
{
  "installed": {
    "client_id": "YOUR_CLIENT_ID_HERE",
    "client_secret": "YOUR_CLIENT_SECRET_HERE",
    "redirect_uris": ["http://localhost:8080/oauth2callback"],
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://accounts.google.com/o/oauth2/token"
  }
}