/**
* 静态方法, 单例统一访问入口
* @return object 返回对象的唯一实例
*/
public static function getInstance()
{
if (is_null(self::$_instance) || !isset(self::$_instance)) {
self::$_instance = new self();
}
return self::$_instance;
}
/**
* 把文档进行转换
* @param array $version
* @param string $mimeType 如mineType为空，则使用version.mime_type
*/
private function pushFileConvert($version, $mimeType)
{
if (empty($mimeType)) {
$mimeType = $version["mime_type"];
}
$miniHost = PluginMiniDocOption::getInstance()->getMiniyunHost();
$siteId = MiniSiteUtils::getSiteID();
$signature = $version["file_signature"];
$node = PluginMiniDocNode::getInstance()->getConvertNode($signature);
if (!empty($node)) {
$url = $node["host"] . '/api.php?route=file/convert';
$downloadUrl = $miniHost . "api.php?route=module/miniDoc/download&signature=" . $signature;
$callbackUrl = $miniHost . "api.php?route=module/miniDoc/report&node_id=" . $node["id"] . "&signature=" . $signature;
$data = array('signature' => $signature, 'site_id' => $siteId, 'mime_type' => $mimeType, 'download_url' => $downloadUrl, "callback_url" => $callbackUrl);
$http = new HttpClient();
$http->post($url, $data);
$result = $http->get_body();
$result = json_decode($result, true);
if ($result['status'] == 1) {
$this->updateDocConvertStatus($node["id"], $version["file_signature"], 1);
}
}
}
/**
* 检查文档节点状态
* @param string $host
* @return int
*/
public function checkNodeStatus($host)
{
$url = $host . '/api.php';
$data = array('route' => "doc/status", 'callback_url' => PluginMiniDocOption::getInstance()->getMiniyunHost() . "info.htm");
$http = new HttpClient();
$http->post($url, $data);
$result = $http->get_body();
$result = @json_decode($result, true);
if ($result["status"] == "1") {
return 1;
}
return -1;
}
/**
* 在线浏览文件获得内容
* @param string $path 文件当前路径
* @param string $type 文件类型，可选择pdf/png
* @throws
* @return NULL
*/
public function previewContent($path, $type)
{
$file = MiniFile::getInstance()->getByPath($path);
// 权限处理
if (empty($file)) {
return array('success' => false, 'msg' => 'file not existed');
}
$fileBiz = new FileBiz();
$canRead = $fileBiz->privilege($path);
if (!$canRead) {
throw new MFileopsException(Yii::t('api', 'no permission'), MConst::HTTP_CODE_409);
}
//获得文件当前版本对应的version
$version = PluginMiniDocVersion::getInstance()->getVersion($file["version_id"]);
$signature = $version["file_signature"];
$localPath = PluginMiniDocOption::getInstance()->getMiniDocCachePath() . $signature . "/" . $signature . "." . $type;
if (!file_exists($localPath)) {
//文档还在转换中
$node = PluginMiniDocNode::getInstance()->getConvertNode($signature);
if (empty($node)) {
throw new MFileopsException(Yii::t('api', 'convert error'), MConst::HTTP_CODE_412);
}
//根据情况判断是否需要向迷你文档拉取内容
$parentPath = dirname($localPath);
//如果缓存目录不存在，则需要创建
if (!file_exists($parentPath)) {
MUtils::MkDirsLocal($parentPath);
}
//文件不存在，则需要从迷你文档拉取文件内容
$url = PluginMiniDocNode::getInstance()->getDownloadUrl($node["id"], $version, $type);
$http = new HttpClient();
$http->get($url);
$status = $http->get_status();
if ($status == "200") {
$content = $http->get_body();
//把文件内容存储到本地硬盘
file_put_contents($localPath, $content);
Yii::log($signature . " get " . $type . " success", CLogger::LEVEL_INFO, "doc.convert");
} else {
if (!($version["doc_convert_status"] == -1)) {
//如迷你文档服务器不存在该文档，说明迷你文档服务器发生了变动
//这个时候自动启动负载均衡机制，把文档重新转换
PluginMiniDocVersion::getInstance()->pushConvertSignature($signature, "");
Yii::log($signature . " get " . $type . " error", CLogger::LEVEL_ERROR, "doc.convert");
}
}
}
if (file_exists($localPath)) {
if ($type === "png") {
$contentType = "image/png";
}
if ($type === "pdf") {
$contentType = "Content-type: application/pdf";
}
//Firefox+混合云模式下直接输出内容
//其它浏览器使用sendfile模式输出内容
$isSendFile = true;
if (MiniUtil::isMixCloudVersion()) {
$ua = isset($_SERVER["HTTP_USER_AGENT"]) ? $_SERVER["HTTP_USER_AGENT"] : NULL;
if (strpos($ua, "Firefox") > 0 || strpos($ua, "Safari") > 0) {
$isSendFile = false;
}
}
if ($isSendFile) {
header('Location: ' . MiniHttp::getMiniHost() . "assets/minidoc/" . $signature . "/" . $signature . "." . $type);
} else {
Header("Content-type: " . $contentType);
echo file_get_contents($localPath);
exit;
}
}
}
