Lua

Get Google Account Info from OAuth2 Access Token

See more Google APIs Examples

In the Google OAuth2 authorization flow, an application can know the email address of the Google account used to authorize access by requesting and processing user information from the Google UserInfo endpoint after obtaining an access token. Lua

local chilkat = require("chilkat")

-- This example assumes the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local http = chilkat.Http.new()

-- Implements the following CURL command:

-- curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://www.googleapis.com/oauth2/v3/userinfo

-- Use the following online tool to generate HTTP code from a CURL command
-- Convert a cURL Command to HTTP Source Code

-- Adds the "Authorization: Bearer YOUR_ACCESS_TOKEN" header.
http.auth_token = "YOUR_ACCESS_TOKEN"

local sbResponseBody = chilkat.StringBuilder.new()
local success = http:quick_get_sb("https://www.googleapis.com/oauth2/v3/userinfo", sbResponseBody)
if not success then
    print(http.last_error_text)
    return
end

local jResp = chilkat.JsonObject.new()
jResp:load_sb(sbResponseBody)
jResp.emit_compact = false

print("Response Body:")
print(jResp:emit())

local respStatusCode = http.last_status
print("Response Status Code = " .. respStatusCode)
if respStatusCode >= 400 then
    print("Response Header:")
    print(http.last_header)
    print("Failed.")
    return
end

-- Sample JSON response:
-- (Sample code for parsing the JSON response is shown below)

-- {
--   "sub": "112233445678901234567",
--   "name": "John Doe",
--   "given_name": "John",
--   "family_name": "Doe",
--   "profile": "https://plus.google.com/112233445678901234567",
--   "picture": "https://lh3.googleusercontent.com/a-/AOh14GiU-EXAMPLE",
--   "email": "johndoe@example.com",
--   "email_verified": true,
--   "locale": "en"
-- }

-- Sample code for parsing the JSON response...
-- Use the following online tool to generate parsing code from sample JSON:
-- Generate Parsing Code from JSON

local v_sub = jResp:string_of("sub")
local name = jResp:string_of("name")
local given_name = jResp:string_of("given_name")
local family_name = jResp:string_of("family_name")
local profile = jResp:string_of("profile")
local picture = jResp:string_of("picture")
local email = jResp:string_of("email")
local email_verified = jResp:bool_of("email_verified")
local locale = jResp:string_of("locale")