WordPress发布/更新文章、提交/审核评论自动清理VeryCloud缓存

/**
* WordPress 发布/更新文章、提交/审核评论自动清理VeryCloud CDN缓存（首页、分类以及当前文章） By 张戈博客
* 文章地址：https://zhangge.net/5090.html
* 转载请保留出处，谢谢合作！
**/

//发布、更新文章刷新缓存
add_action('publish_post', 'refresh_By_Publish', 0);
//提交评论刷新缓存
add_action('comment_post', 'refresh_By_Comments',0);
//审核评论刷新缓存
add_action('comment_unapproved_to_approved', 'refresh_By_Approved',0);

define('CRYPT_SALT', 'verycloud#cryptpass');
$cdn_provider = array(
	"verycdn" => array(
		"push" => "https://api3.verycloud.cn/API/cdn/refresh",
		"token" => "https://api3.verycloud.cn/API/OAuth/authorize",
		"username" => "此处填写verycloud用户名",
		"password" => "此处填写verycloud密码",
	),
);

//发布文章更新文章、分类和首页的缓存函数
function refresh_By_Publish($post_ID)
{
    $pageurl    = get_permalink($post_ID);
    $homeurl    = home_url();
    
    $category   = get_the_category();
    if($category[0]){
        //如果文章属于多个分类，默认只刷新第一个分类地址
        $caturl = get_category_link($category[0]->term_id );
        $url    = $pageurl . ',' . $caturl . ',' . $homeurl;
    } else {
        $url    = $pageurl . ',' . $homeurl;
    }
    
    $data = array(
		'type' => 'file',
		'urls' => $url
	);
    refresh($data);
}

//提交评论刷新当前文章CDN缓存
function refresh_By_Comments($comment_id)
{
    $comment = get_comment($comment_id);
    $url = get_permalink($comment->comment_post_ID);
    
    $data = array(
		'type' => 'file',
		'urls' => $url,
	);
    refresh($data);
}

//审核评论刷新当前文章CDN缓存
function refresh_By_Approved($comment)
{
    $url = get_permalink($comment->comment_post_ID);
    $data = array(
		'type' => 'file',
		'urls' => $url,
	);
    refresh($data);
}

function post_data($url, $data, $type = "POST") {
    $ch = curl_init();
  
    // 使用TLS1.0
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_SSLVERSION, 1); //CURL_SSLVERSION_TLSv1	

    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 1 );
    curl_setopt($ch, CURLOPT_POST, true);

    if ( $type == "POST" ) {
	$parm_string = http_build_query($data, '&');
	curl_setopt($ch, CURLOPT_POSTFIELDS, $parm_string);
    } else {
	curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    }
    $output = curl_exec($ch);
    curl_close($ch);
    return $output;
}

//生成tokens
function get_verycdn_token() {
	global $cdn_provider;
	$post_data["username"] = $cdn_provider["verycdn"]["username"];
	$post_data["password"] = encrypt($cdn_provider["verycdn"]["password"]);

	$res = post_data($cdn_provider["verycdn"]["token"], $post_data);
	
	$result = json_decode($res);
	return $result->access_token;
	//var_dump($post_data);
	//var_dump($result);
}

function encrypt($txtStream) {
        //以下行中的字符串可能需要找客服提供，具体请自行试试。
	$lockstream = 'st=lDEFABCNOPyzghi_jQRST-UwxkVWXYZabcdefIJK6/7nopqr89LMmGH012345uv';
	$lockLen = strlen($lockstream);
	$lockCount = rand(0, $lockLen-1);
	$randomLock = $lockstream[$lockCount];
	$password = md5(CRYPT_SALT . $randomLock);
	$txtStream = base64_encode($txtStream);
	$tmpStream = '';
	$i = 0; $j = 0; $k = 0;
	for($i = 0; $i < strlen($txtStream); $i++) {
		$k = ($k == strlen($password)) ? 0 : $k;
		$j = (strpos($lockstream, $txtStream[$i]) + $lockCount + ord($password[$k])) % ($lockLen);
		$tmpStream .= $lockstream[$j];
		$k++;
	}
	return $tmpStream . $randomLock;
}

/**
* 提交刷新
* @param $data
* @return array
*/
function refresh($data) {
  	global $cdn_provider;
    $token = get_verycdn_token();
    if(!$token) {
      return array(
        'code' => 0,
        'message' => 'unable to get token'
      );
    }
    //刷新类型 file 文件 dir 目录
    $type = isset($data['type']) && !empty($data['type']) ? trim($data['type']) : '';
    //刷新url
    $urls = isset($data['urls']) && !empty($data['urls']) ? $data['urls'] : '';
    //url分隔符，多个url使用该符号分隔，默认,
    $partition = isset($data['partition']) && !empty($data['partition']) ? trim($data['partition']) : ',';
    if(empty($type) || empty($urls)) {
      return array(
        'code' => 0,
        'message' => 'type and urls are required',
      );
    }

    $url = $cdn_provider["verycdn"]["push"];

    $send_data = array(
      'token' => $token,
      'type' => $type,
      'urls' => $urls,
      'partition' => $partition
    );

    $return = post_data($url, $send_data);
    return $return;
}