PHP ActiveX

Google Photos OAuth2 Access Token

See more Google Photos Examples

Demonstrates how to get a Google Photos OAuth2 access token from a desktop application or script. PHP ActiveX

<?php

$success = 0;

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

$oauth2 = new COM("Chilkat.OAuth2");

// For Google OAuth2, set the listen port equal to the port used
// in the Authorized Redirect URL for the Client ID.
// For example, in this case the Authorized Redirect URL would be http://localhost:3017/
// Your app should choose a port not likely not used by any other application.
$oauth2->ListenPort = 3017;

$oauth2->AuthorizationEndpoint = 'https://accounts.google.com/o/oauth2/v2/auth';
$oauth2->TokenEndpoint = 'https://www.googleapis.com/oauth2/v4/token';

// Replace these with actual values.
$oauth2->ClientId = 'GOOGLE-CLIENT-ID';
$oauth2->ClientSecret = 'GOOGLE-CLIENT-SECRET';

$oauth2->CodeChallenge = 1;
$oauth2->CodeChallengeMethod = 'S256';

// This is a scope for Google Photos.  See https://developers.google.com/photos/library/guides/authentication-authorization
// This scope provides read/write access but not sharing.
$oauth2->Scope = 'https://www.googleapis.com/auth/photoslibrary';

// Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
$url = $oauth2->startAuth();
if ($oauth2->LastMethodSuccess == 0) {
    print $oauth2->LastErrorText . "\n";
    exit;
}

// Launch the system's default browser navigated to the URL.
$success = $oauth2->LaunchBrowser($url);
if ($success == 0) {
    print $oauth2->LastErrorText . "\n";
    exit;
}

// Now wait for the authorization.
// We'll wait for a max of 120 seconds.
$numMsWaited = 0;
while (($numMsWaited < 120000) and ($oauth2->AuthFlowState < 3)) {
    $oauth2->SleepMs(100);
    $numMsWaited = $numMsWaited + 100;
}

// If there was no response from the browser within 120 seconds, then 
// the AuthFlowState will be equal to 1 or 2.
// 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
// 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
// In that case, cancel the background task started in the call to StartAuth.
if ($oauth2->AuthFlowState < 3) {
    $oauth2->Cancel();
    print 'No response from the browser!' . "\n";
    exit;
}

// Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
// The possible AuthFlowState values are:
// 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
// 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
// 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
if ($oauth2->AuthFlowState == 5) {
    print 'OAuth2 failed to complete.' . "\n";
    print $oauth2->FailureInfo . "\n";
    exit;
}

if ($oauth2->AuthFlowState == 4) {
    print 'OAuth2 authorization was denied.' . "\n";
    print $oauth2->AccessTokenResponse . "\n";
    exit;
}

if ($oauth2->AuthFlowState != 3) {
    print 'Unexpected AuthFlowState:' . $oauth2->AuthFlowState . "\n";
    exit;
}

// Save the full JSON access token response to a file.
$sbJson = new COM("Chilkat.StringBuilder");
$sbJson->Append($oauth2->AccessTokenResponse);
$sbJson->WriteFile('qa_data/tokens/googlePhotos.json','utf-8',0);

// The saved JSON response looks like this:
// {
//   "access_token": "ya29.GlamBqWR6cp8lEfJMmTHVEua45912XLKoq4djyHl_Z3CEIzsPLIZkJSGie5oOrbaggy1rjJHn1zW5bjqSesGr5MEYIp9Hx-0CuvjVYf8srg2jeaDMwMACvzemp43",
//   "expires_in": 3600,
//   "refresh_token": "1/rl6k16nysDl9Bp1EhRH9F1WyRIoiSQAvko49Z4yY694MT5V1QXLj2ibNZGaRgek0",
//   "scope": "https://www.googleapis.com/auth/photoslibrary",
//   "token_type": "Bearer"
// }

print 'OAuth2 authorization granted!' . "\n";
print 'Access Token = ' . $oauth2->AccessToken . "\n";

?>