node.js（Javascript）google-api-nodejs-client - 列出消息

Question

我的问题被否决了，所以我正在改写它，希望这更简洁

我很难写一个javascript函数来列出收件箱中的邮件。

使用 - 官方＆＃34; google-api-nodejs-client＆＃34;，node.js，电子，（和javascript） 目标：在Gmail收件箱中列出邮件 为了工作我需要首先授权然后要求消息

授权   - I copied the code from google node.js quickstart   - 这适用于电子（实际上是node.js，因为它是命令行脚本）。

询问消息   - Google has an example，我复制它调整了一些部分，但没有工作。我认为我正在使用的示例并非针对node.js＆＃34; google-api-nodejs-client＆＃34;而设计。   - 也许它需要不同的授权

这是google示例中的listmessages函数，我似乎无法弄清楚如何使用列表标签中的授权来完成此工作。这就是我试过的

• 将gapi更改为谷歌
• 将userId更改为＆＃39; me＆＃39;
• 将givig更改为查询

不使用客户端库。

＆＃13;

＆＃13;

Does not use a client library.

/**
 * Retrieve Messages in user's mailbox matching query.
 *
 * @param  {String} userId User's email address. The special value 'me'
 * can be used to indicate the authenticated user.
 * @param  {String} query String used to filter the Messages listed.
 * @param  {Function} callback Function to call when the request is complete.
 */
function listMessages(userId, query, callback) {
  var getPageOfMessages = function(request, result) {
    request.execute(function(resp) {
      result = result.concat(resp.messages);
      var nextPageToken = resp.nextPageToken;
      if (nextPageToken) {
        request = gapi.client.gmail.users.messages.list({
          'userId': userId,
          'pageToken': nextPageToken,
          'q': query
        });
        getPageOfMessages(request, result);
      } else {
        callback(result);
      }
    });
  };
  var initialRequest = gapi.client.gmail.users.messages.list({
    'userId': userId,
    'q': query
  });
  getPageOfMessages(initialRequest, []);
}

＆＃13;

＆＃13;

＆＃13;

这是用于列出标签的aurhorize功能。

＆＃13;

＆＃13;

var fs = require('fs');
var readline = require('readline');
var google = require('googleapis');
var googleAuth = require('google-auth-library');

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

/**
 * 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 auth = new googleAuth();
  var oauth2Client = new auth.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));
  console.log('Token stored to ' + TOKEN_PATH);
}

/**
 * Lists the labels in the user's account.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listLabels(auth) {
  var gmail = google.gmail('v1');
  gmail.users.labels.list({
    auth: auth,
    userId: 'me',
  }, function(err, response) {
    if (err) {
      console.log('The API returned an error: ' + err);
      return;
    }
    var labels = response.labels;
    if (labels.length == 0) {
      console.log('No labels found.');
    } else {
      console.log('Labels:');
      for (var i = 0; i < labels.length; i++) {
        var label = labels[i];
        console.log('- %s', label.name);
      }
    }
  });
}

＆＃13;

＆＃13;

＆＃13;

Answer 1

您的程序流程应如下所示：

然后您可以使用api列出消息。 （只是为了让你开始）：

export function listMessages(oauth2Client, userId, query, callback) { const gmail = google.gmail('v1'); gmail.users.messages.list({ auth: oauth2Client, userId: 'me', }, (err, response) => { console.log(response); }); }

注意oauth2Client参数。这是您从函数授权中获得的对象。如果您有任何疑问，请告诉我。