Accessing Google Calendar API without authorization via JavaScript

Question

I'm trying to access a public calendar (from Google Calendar) that contains national holidays:

calendarId: 'pt_br.brazilian#[email protected]' 

As the calendar is public, I thought I would be able to access it using only the API Key:

function OnLoadCallback() {     var config = {         client_id: '32j4lk32j5kj342l5h.googleuser.com', //fake client id         scope: 'https://www.googleapis.com/auth/calendar.readonly'     };     gapi.client.setApiKey('fId345AM20HXXXXXXXXXXXXXXXXgT3f9kyp2REfkaw2'); //fake api key     gapi.client.load('calendar', 'v3', function() {         var today = new Date(),             request;          request = gapi.client.calendar.calendarList.get({             calendarId: 'pt_br.brazilian#[email protected]',             timeMin: (new Date(today.getFullYear(), today.getMonth(), today.getDay(), 0, 0, 0, 0)).toISOString(),             timeMax: (new Date(today.getFullYear(), today.getMonth(), today.getDay(), 23, 59, 59, 999)).toISOString(),             fields: 'items(creator(displayName,email),end,endTimeUnspecified,start,summary)'         });          request.execute(function(response) {             window.alert('length of items: ' + response.items.length);         });      }); } 

However, I keep getting the following response, which is a 401 (unauthorized) error:

{  "error": {   "errors": [    {     "domain": "global",     "reason": "required",     "message": "Login Required",     "locationType": "header",     "location": "Authorization"    }   ],   "code": 401,   "message": "Login Required"  } } 

Can someone clarify whether what I'm trying to do is achievable or not?
And finally if it is possible - what do I have to change referring to my current code?

Answer 1

I was able to do the same thing using jQuery.

var mykey = 'your_api_key'; // typically like Gtg-rtZdsreUr_fLfhgPfgff var calendarid = 'you_calendar_id'; // will look somewhat like [email protected]  $.ajax({     type: 'GET',     url: encodeURI('https://www.googleapis.com/calendar/v3/calendars/' + calendarid+ '/events?key=' + mykey),     dataType: 'json',     success: function (response) {         //do whatever you want with each     },     error: function (response) {         //tell that an error has occurred     } }); 

However you need to be sure you have done the following:-

---

1) Register a project at https://code.google.com/apis/console
2) Generate a Simple API Access key
3) Ensure Calendar API is activated under services.

Read more at https://developers.google.com/google-apps/calendar/firstapp