Get messages in users' GMail inbox

Question

In the code below I am signing in, authorising the app, and getting console output via the GMail API. I believe I am getting the threads and thread IDs, but I am not seeing the messages in the console.

I am not getting any errors and I am getting output, just what seems like keys with no values.

Here is what the console output looks like:

Here is the code:

var CLIENT_ID = 'YOUR_CLIENT_ID';
var SCOPES = ['https://www.googleapis.com/auth/gmail.readonly'];
var USER = 'me';

  /**
   * Called when the client library is loaded to start the auth flow.
   */
  function handleClientLoad() {
    window.setTimeout(checkAuth, 1);
  }

  /**
   * Check if the current user has authorized the application.
   */
  function checkAuth() {
    gapi.auth.authorize(
        {'client_id': CLIENT_ID, 'scope': SCOPES, 'immediate': true},
        handleAuthResult);
  }

  /**
   * Called when authorization server replies.
   *
   * @param {Object} authResult Authorization result.
   */
  function handleAuthResult(authResult) {
    var authButton = document.getElementById('authorizeButton');
    var outputNotice = document.getElementById('notice');
    authButton.style.display = 'none';
    outputNotice.style.display = 'block';
    if (authResult && !authResult.error) {
      // Access token has been successfully retrieved, requests can be sent to the API.
      gapi.client.load('gmail', 'v1', function() {
        listThreads(USER, function(resp) {
          var threads = resp.threads;
          for (var i = 0; i < threads.length; i++) {
            var thread = threads[i];
            console.log(thread);
            console.log(thread['id']);
          }
        });
      });
    } else {
      // No access token could be retrieved, show the button to start the authorization flow.
      authButton.style.display = 'block';
      outputNotice.style.display = 'none';
      authButton.onclick = function() {
          gapi.auth.authorize(
              {'client_id': CLIENT_ID, 'scope': SCOPES, 'immediate': false},
              handleAuthResult);
      };
    }
  }


  /**
   * Get a page of Threads.
   *
   * @param  {String} userId User's email address. The special value 'me'
   * can be used to indicate the authenticated user.
   * @param  {Function} callback Function called when request is complete.
   */
  function listThreads(userId, callback) {
    var request = gapi.client.gmail.users.threads.list({
      'userId': userId
    });
    request.execute(callback);
  }

How can I retrieve the from address, subject, and body of the messages? with the GMAIL API in js

**Update: What I am currently working with: **

listThreads('me', function(dataResult){
    $.each(dataResult, function(i, item){
        getThread('me', item.id, function(dataMessage){
            console.log(dataMessage);
            var temp = dataMessage.messages[0].payload.headers;
            $.each(temp, function(j, dataItem){
                if(dataItem.name == 'From'){
                    console.log(dataItem.value);
                }
            });
         });
      });
   });

When I log dataMessage, I get a 400 error, ' id required '. When I log dataItem.value, I get a dataMessage.messages is undefined and can not have an index of 0.

I'd greatly appreciate help in getting this working!

Answer 1

GMail api in Javascript does not explicit methods to access particular email part - to/from/etc. GMail api in Java has this feature. Gmail api in Javascript are still in Beta. api list

You still wanna do it: Here is outline:

Instead of getting list of threads get list of messages: message list

Parse message id from json retrieved from previous call, use it with following: message get

Get raw message in URL encoded base64 format. Decode and parse. safe encoding encoding

Difficult... You bet... :)