php - 如何使用 Google Calendar API v3/Google API 客户端库显示*所有*可用日历的列表？

Question

我一直在尝试使用 PHP 访问 Google Calendar API v3。最初，我想简单地列出我可以通过 API 调用访问的用户日历。

为此，我下载了 Google API PHP 客户端库并尝试使用以下代码(经过我的改编，来源自 https://mytechscraps.wordpress.com/2014/05/15/accessing-google-calendar-using-the-php-api/):

<?php

//error_reporting(0);
//@ini_set('display_errors', 0);

// If you've used composer to include the library, remove the following line
// and make sure to follow the standard composer autoloading.
// https://getcomposer.org/doc/01-basic-usage.md#autoloading
require_once './google-api-php-client-master/autoload.php';

// Service Account info
$client_id = '754612121864-pmdfssdfakqiqblg6lt9a.apps.googleusercontent.com';
$service_account_name = '754674507864-pm1dsgdsgsdfsdfsdfdflg6lt9a@developer.gserviceaccount.com';
$key_file_location = 'Calendar-7dsfsdgsdfsda953d68dgdsgdsff88a.p12';


$client = new Google_Client();
$client->setApplicationName("Calendar");

$service = new Google_Service_Calendar($client);

$key = file_get_contents($key_file_location);
$cred = new Google_Auth_AssertionCredentials(
 $service_account_name,
 array('https://www.googleapis.com/auth/calendar.readonly'),
 $key
);

$client->setAssertionCredentials($cred);

$cals = $service->calendarList->listCalendarList();
print_r($cals);

?>

我已在 Google Developers 控制台中创建了一个服务帐户，并生成了 OAuth 详细信息，我用它来设置适当的变量，如代码所示。

此代码返回以下内容:

Google_Service_Calendar_CalendarList Object ( [collection_key:protected] => items [internal_gapi_mappings:protected] => Array ( ) [etag] => "14171313334000" [itemsType:protected] => Google_Service_Calendar_CalendarListEntry [itemsDataType:protected] => array [kind] => calendar#calendarList [nextPageToken] => [nextSyncToken] => 000014121268327000 [modelData:protected] => Array ( [items] => Array ( [0] => Array ( [kind] => calendar#calendarListEntry [etag] => "1417721316542000" [id] => bots@madeupcompany.co.uk [summary] => bots@madeupcompany.co.uk [timeZone] => Europe/London [colorId] => 23 [backgroundColor] => #cd74e6 [foregroundColor] => #000000 [selected] => 1 [accessRole] => reader [defaultReminders] => Array ( ) ) ) ) [processed:protected] => Array ( ) )

问题是，这似乎只返回一个日历的详细信息。也就是说，bots@madeupcompany.co.uk 的日历(我与我的服务明确共享的唯一日历)。

但是，我知道此 Google 帐户对许多其他用户的日历具有只读访问权限(当我以该用户身份登录 Google 日历时可以看到它们)。

此外，如果我在此页面上使用 Google Apps Explorer:https://developers.google.com/google-apps/calendar/v3/reference/calendarList/list#auth ，当我以 bots@madeupcompany.co.uk 身份登录我的 Google 帐户时，我可以获得所有这些其他日历的详细信息。

所以我想弄清楚，为什么 Apps Explorer 向我显示了所有其他日历，但 PHP 代码却没有？

Answer 1

服务帐户不需要提示用户访问，因为您必须对其进行设置。访问 Google 日历网站。找到“日历设置”，然后转到“日历”选项卡，找到您要访问的日历，然后单击“共享:编辑设置”，添加服务帐户电子邮件地址，就像添加个人电子邮件地址一样。这将为服务帐户提供与您与任何其他用户共享相同的访问权限。

<?php
session_start();        
require_once 'Google/Client.php';
require_once 'Google/Service/Calendar.php';     
/************************************************   
 The following 3 values an befound in the setting   
 for the application you created on Google      
 Developers console.         Developers console.
 The Key file should be placed in a location     
 that is not accessable from the web. outside of 
 web root.   

 In order to access your GA account you must    
 Add the Email address as a user at the     
 ACCOUNT Level in the GA admin.         
 ************************************************/
$client_id = '1046123799103-nk421gjc2v8mlr2qnmmqaak04ntb1dbp.apps.googleusercontent.com';
$Email_address = '1046123799103-nk421gjc2v8mlr2qnmmqaak04ntb1dbp@developer.gserviceaccount.com';     
$key_file_location = '629751513db09cd21a941399389f33e5abd633c9-privatekey.p12';     
$client = new Google_Client();      
$client->setApplicationName("Client_Library_Examples");
$key = file_get_contents($key_file_location);    
// seproate additional scopes with a comma   
$scopes ="https://www.googleapis.com/auth/calendar.readonly";   
$cred = new Google_Auth_AssertionCredentials(    
    $Email_address,      
    array($scopes),     
    $key         
    );      
$client->setAssertionCredentials($cred);
if($client->getAuth()->isAccessTokenExpired()) {        
    $client->getAuth()->refreshTokenWithAssertion($cred);       
}       
$service = new Google_Service_Calendar($client);    

?>

<html><body>

<?php
$calendarList  = $service->calendarList->listCalendarList();
print_r($calendarList);
while(true) {
    foreach ($calendarList->getItems() as $calendarListEntry) {
        echo "<a href='Oauth2.php?type=event&id=".$calendarListEntry->id." '>".$calendarListEntry->getSummary()."</a><br>\n";
    }
    $pageToken = $calendarList->getNextPageToken();
    if ($pageToken) {
        $optParams = array('pageToken' => $pageToken);
        $calendarList = $service->calendarList->listCalendarList($optParams);
    } else {
        break;
    }
}    

?>
</html> 

从教程中摘取的代码 Google Calendar API with PHP – Service Account