Error authorizing AJAX call to Gmail API

I'm just getting started with the GMail API and I'm attempting to use AJAX to fetch emails.

This is my code:

 $.ajax({
    beforeSend: function (request)
       {
           request.setRequestHeader("authorization", "Bearer  xxxxxxxxxxxxxxxxx.apps.googleusercontent.com");
       },
    url: 'https://www.googleapis.com/gmail/v1/users/me/messages?key=xxxxxxxxxxxxxxxxxx',
    dataType: 'json',
    cache: false,
    success: function(data) {
         //  this.setState({Emails: data});
         console.log("Mail thread"+data);
       }.bind(this),
     error: function(xhr, status, err) {
       console.error(this.props.url, status, err.toString());
     }.bind(this)
   });
 },

When I make the call, I receive a 401 error. Upon inspecting the request URL, I notice that there's an additional query parameter added to the end of it:

&_=1470236511985 

So the final request URL looks like this.

https://www.googleapis.com/gmail/v1/users/me/messages?key=xxxxxxxxxxxxxxxxxx&_=1470236511985 

Could this extra query parameter be causing the 401 error, or am I using the authorization header incorrectly? How can I go about fixing this issue?

Thank you in advance.

Answer №1

Interested in testing? Head over to the OAuth 2.0 Playground and secure an access token for Gmail API. Simply insert this access token as a query parameter called access_token:

var accessToken = 'ya29...';

$.ajax({
  url: 'https://www.googleapis.com/gmail/v1/users/me/messages?access_token=' + accessToken,
  dataType: 'json',
  success: function(data) {
    console.log(data.messages);
  }
}

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