问题已解决
我已经使用php客户端库成功获得了一个OAuth2令牌，该令牌具有访问Google日历事件和Google联系人的适当范围（-edit-，在Google Developers控制台上启用了这两个API）。我可以使用该服务访问客户端的事件，但没有联系人服务。
如何使用此处引用的OAuth2令牌手动向Google Contacts API（GData-ver:3.0）发送授权的GET请求？
这是在Joomla3.x中，但我直接使用php。
$retrieveURL = 'https://www.google.com/m8/feeds/contacts/default/full?access_token=' . urlencode($tokens->access_token) . '&v=3.0';
$cURL = curl_init();
curl_setopt($cURL, CURLOPT_URL, $retrieveURL);
curl_setopt($cURL, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($cURL, CURLINFO_HEADER_OUT, 1);
curl_setopt($cURL, CURLOPT_SSL_VERIFYPEER, false);
$gContacts = curl_exec($cURL);
if ($errno = curl_errno($cURL)) {
$error_message = curl_strerror($errno);
echo("cURL error ({$errno}):'n {$error_message}:'n ");
var_dump(curl_getinfo($cURL, CURLINFO_HEADER_OUT));
}
var_dump($gContacts);
return $gContacts;
谷歌的回应：
401. That's an error. There was an error in your request. That's all we know.
Access令牌不能用作http GET请求的参数。您需要在web应用程序中设置它们。如何做到这一点可以在这里找到。
一旦设置完成，https://www.google.com/m8/feeds/contacts/default/full?v=3.0的GET请求应该能够工作。
我发现了如何使用PHP客户端库中的Google_Http_Request对象来实现这一点。
$retrieveURL = 'https://www.google.com/m8/feeds/contacts/default/full?alt=json';
$httpRequest = new Google_Http_Request($retrieveURL, 'GET');
/**
* this will first check and renew access_token if needed
* then sets the access token in the request header
**/
$client->getAuth()->sign($httpRequest);
/**
* modify the request to work with Google Contacts API v3.0
**/
$httpRequest->setBaseComponent('https://www.google.com');
$httpRequest->setRequestHeaders(['Gdata-version' => '3.0']));
/**
* Send the request and assign the response
**/
$response = $client->getIo()->makeRequest($httpRequest);
// replace problematic '$'s with 'G's in json response string
$responseString = implode('G', explode('$', $response->getResponseBody()));
$responseBody = json_decode($responseString);
$responseArray = $responseBody->feed->entry;
foreach ((array)$responseArray as $entry) {
$gdName = (isset($entry->gdGname->gdGfullName->Gt)) ? $entry->gdGname->gdGfullName->Gt : 'No Name';
$gdFName = (isset($entry->gdGname->gdGgivenName->Gt)) ? $entry->gdGname->gdGgivenName->Gt : 'No First Name';
$gdLName = (isset($entry->gdGname->gdGfamilyName->Gt)) ? $entry->gdGname->gdGfamilyName->Gt : 'No Last Name';
$gdEmail = (isset($entry->gdGemail[0]->address)) ? $entry->gdGemail[0]->address : 'No Email Address';
$gdPhone = (isset($entry->gdGphoneNumber[0]->Gt)) ? $entry->gdGphoneNumber[0]->Gt : 'No Phone Number';
$gdOrgName = (isset($entry->gdGorganization[0]->gdGorgName->Gt)) ? $entry->gdGorganization[0]->gdGorgName->Gt : 'No Company Name';
$output[] = [
"name" => $gdName,
"first_name" => $gdFName,
"last_name" => $gdLName,
"email" => $gdEmail,
"phone" => $gdPhone,
"company" => $gdOrgName,
];
}
$app = $this->app;
// store the contact and redirect to view
$_SESSION["gdContacts"] = $output;
$app->redirect(JRoute::_('web/content/google/contacts'));