How to get access to user's google calendar from React Native (expo)?

Question

I use Expo, and I want to add access to my app to users which have a Google account. Then I need to get info about Google calendars of the user which login into my app.

I implement login function using: Expo.Google.logInAsync(options) (https://docs.expo.io/versions/latest/sdk/google). My scope look like this:

scopes: ['https://www.googleapis.com/auth/userinfo.email',
         'https://www.googleapis.com/auth/userinfo.profile',
         'https://www.googleapis.com/auth/calendar.readonly']

When someone tries to login into my app, it asks about permission to see calendars list. In response I get:

Object {
    "accessToken": "a",
    "idToken": "b",
    "refreshToken": "c",
    "serverAuthCode": "d",
    "type": "success",
    "user": Object {
        "email": "e",
        "familyName": "f",
        "givenName": "g",
        "id": "h",
        "name": "i",
        "photoUrl": "j",
    },
}

I received data about the user, but I don't have any data about its calendars. I tried to get data about calendars (https://developers.google.com/calendar/v3/reference/calendarList) with this function:

getUsersCalendarList = async (accessToken) => {
    let calendarsList = await fetch('https://www.googleapis.com/calenda/v3/users/me/calendarList', {
    headers: { Authorization: `Bearer ${accessToken}`},
    });
    return calendarsList;
}

In response I got:

 Response {
       "_bodyBlob": Blob {
         "_data": Object {
           "blobId": "67b8b161-690f-4ff6-9cee-1dce12840ebd",
           "offset": 0,
           "size": 994,
         },
       },
       "_bodyInit": Blob {
         "_data": Object {
           "blobId": "67b8b161-690f-4ff6-9cee-1dce12840ebd",
           "offset": 0,
           "size": 994,
         },
       },
       "headers": Headers {
         "map": Object {
           "alt-svc": Array [
             "quic=\":443\"; ma=2592000; v=\"44,43,39,35\"",
           ],
           "cache-control": Array [
             "public, max-age=0",
           ],
           "content-type": Array [
             "application/json; charset=UTF-8",
           ],
           "date": Array [
             "Thu, 17 Jan 2019 11:30:32 GMT",
           ],
           "expires": Array [
             "Thu, 17 Jan 2019 11:30:32 GMT",
           ],
           "server": Array [
             "GSE",
           ],
           "vary": Array [
             "X-Origin",
           ],
           "x-content-type-options": Array [
             "nosniff",
           ],
           "x-frame-options": Array [
             "SAMEORIGIN",
           ],
           "x-xss-protection": Array [
             "1; mode=block",
           ],
         },
       },
       "ok": false,
       "status": 403,
       "statusText": undefined,
       "type": "default",
       "url": "https://www.googleapis.com/calendar/v3/users/me/calendarList",
     }

How can I get a list of user's google calendars in Expo?

Please edit your question and include the full error message. — DaImTo
I added the full error message. I'm not sure if the flow of getting user's calendar information is correct. Do you know how exactly it works? Can I get information about user's calendar with accessToken from any google account or only from application account? — trojek

trojek trojek · Accepted Answer · 2019-01-17T16:07:59

I find the solution here: React-Native JSON fetch from URL. One needs to use json() function on returned object. The getUsersCalendarList schulde look like this:

getUsersCalendarList = async (accessToken) => {
    let calendarsList = await fetch('https://www.googleapis.com/calenda/v3/users/me/calendarList', {
    headers: { Authorization: `Bearer ${accessToken}`},
    });
    return calendarsList.json();
}

How to get access to user's google calendar from React Native (expo)?

2 Answers