我一直在尝试使用PHP访问Google Calendar API v3。最初，我想简单地列出我对 API 的调用可以访问的用户日历。
为此，我下载了Google API PHP客户端库，并尝试使用以下代码(这些代码来自 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);
?>
我在 Google 开发人员控制台中创建了一个服务帐户，并生成了 OAuth 详细信息，我已使用该详细信息设置适当的变量，从代码中可以看出。
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 日历(我与我的服务明确共享的唯一日历(。
但是，我知道这个谷歌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谷歌日历时，我可以看到它们(。
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，同时以 bots@madeupcompany.co.uk 身份登录我的Google帐户，我会获得所有其他日历的详细信息。
所以我正在尝试弄清楚，为什么应用程序资源管理器向我显示所有其他日历，而 PHP 代码却没有？
服务帐户不需要提示用户访问，因为您必须进行设置。转到谷歌日历网站。 找到日历设置，然后转到日历选项卡，找到要访问的日历，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任何其他用户共享服务帐户相同的访问权限。
<?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>
从教程中翻录的代码 谷歌日历 API 与 PHP – 服务帐户