Google API PHP客户端:发送etag [英] Google API php client: send etag

问题描述

我正在使用最新的 Google PHP客户端库.如何通过此库发送etag?

I'm using the latest Google PHP Client library. How can I send the etag with this library?

我已经尝试过这样的事情:

I've already tried something like this:

$opt_params = array(
'etag' => 'F9iA7pnxqNgrkOutjQAa9F2k8HY/mOihMVEDLCvdSVCzwDmYHpSV');

$response = $youtube->channels->listChannels('snippet', array('id' => $channel_id), $opt_params);

谢谢！

推荐答案

Google API PHP客户端不对

The Google API PHP Client does not have native support for etags. That said, you can still alter the curl request and apply an etag as a header.

不幸的是，当Google_Http_REST收到304 Not Modified标头时会引发异常，因此您需要在catch -block中单独处理这些标头.

Unfortunately Google_Http_REST throws an exception when it receives a 304 Not Modified header so you'll need to handle those seperately in a catch-block.

这是生成的PHP代码(请注意，这是针对Google API PHP客户端的版本1):

This is the resulting PHP-code (note, this is for version 1 of the Google API PHP Client):

class EmptyResponse { }

$DEVELOPER_KEY = '';

$client = new Google_Client();
$client->setDeveloperKey($DEVELOPER_KEY);

$youtube = new Google_Service_YouTube($client);

// Do some logic, catch some resources
// ..

// Set the "If-None-Match" header for the etag
// This assumes the Google API is using CURL
$client->getIo()->setOptions(array(
    CURLOPT_HTTPHEADER => array('If-None-Match: "4FSIjSQU83ZJMYAO0IqRYMvZX98/OPaxOhv3eeKc9owSnDQugGfL8ss"'),
));

try {
  $response = $youtube->playlists->listPlaylists('snippet', array(
      'id' => 'PLOIvOnfHWjIkiz6fd5KYUXJY6ZpHRqPfW',
  ));
}
catch (Google_Service_Exception $e) {
  if (304 == $e->getCode()) {
      // If the error code is 304 (Not Modified) return an empty response
      $response = new EmptyResponse;
  }
  else {
      // The request was unsuccesful
      $response = null;
  }
}

// After the request set the headers back to default
$client->getIo()->setOptions(array(
    CURLOPT_HTTPHEADER => array(),
));

var_dump($response);

// Catch some more resources
// ...

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