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<?php
/**
* M3u8 Controller
*/
require_once __DIR__ . '/../../../lib/DirScanner.php';
require_once __DIR__ . '/../../../plugins/Parsedown.php';
require_once __DIR__ . '/../../../plugins/Common.php';
Class M3u8Controller extends Controller {
protected $allFilesCacheKey = 'MainBotAllFiles';
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//参数
//@id - 文件id
//@cid - 数据缓存id
//支持nginx secure防盗链:md5={$md5}&expires={$expires}
//支持只传video id,从索引数据中获取文件信息
public function actionIndex() {
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$videoId = $this->get('id', '');
$cacheParentDataId = $this->get('cid', '');
if (empty($videoId)) {
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throw new Exception("参数缺失!", 403);
}
//TODO: 防盗链检查
if (!empty($cacheParentDataId)) {
$cacheSeconds = 86400;
$cachedParentData = Common::getCacheFromFile($cacheParentDataId, $cacheSeconds);
if (empty($cachedParentData)) {
$err = '缓存数据已失效,如果重新点击目录依然打不开,请联系管理员。';
throw new Exception($err, 404);
}
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}
if (!empty($cachedParentData) && empty($cachedParentData[$videoId])) {
$erro = "缓存数据中找不到当前视频,请返回上一页重新进入!";
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throw new Exception($err, 404);
}else if (!empty($cachedParentData[$videoId])) {
//渲染m3u8内容
$m3u8 = $cachedParentData[$videoId];
$m3u8Content = $this->getM3u8Content($m3u8['realpath'], $cachedParentData);
if (!empty($m3u8Content)) {
return $this->renderM3u8($m3u8Content);
}else {
$err = 'm3u8内容为空!';
throw new Exception($err, 500);
}
}else { //尝试从索引数据中获取文件信息
$expireSeconds = 86400 * 365; //缓存 365 天
$cacheData = Common::getCacheFromFile($this->allFilesCacheKey . '_stats', $expireSeconds);
if (!empty($cacheData)) {
$dirNum = $cacheData['dirnum'];
$index = Common::getIndexNumByFileId($videoId, $dirNum) + 1;
$cacheKey = $this->allFilesCacheKey . "_{$index}";
$cacheFiles = Common::getCacheFromFile($cacheKey, $expireSeconds);
if (!empty($cacheFiles[$videoId])) {
$m3u8 = $cacheFiles[$videoId];
$m3u8Content = $this->getM3u8Content($m3u8['realpath']);
if (!empty($m3u8Content)) {
return $this->renderM3u8($m3u8Content);
}else {
$err = 'm3u8内容为空!';
throw new Exception($err, 500);
}
}else {
$err = '索引数据中找不到此视频!';
throw new Exception($err, 500);
}
}else {
$err = '没有索引数据,请参考文档生成索引!';
throw new Exception($err, 500);
}
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}
}
//生成m3u8内容,支持ts防盗链
/**
* M3u8 content sample:
#EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:6
#EXT-X-PLAYLIST-TYPE:VOD
#EXTINF:5,
0.ts
#EXTINF:5,
1.ts
#EXTINF:5,
2.ts
#EXTINF:5,
3.ts
#EXTINF:5,
4.ts
#EXTINF:0.31697,
5.ts
#EXT-X-ENDLIST
**/
protected function getM3u8Content($m3u8_realpath, $cachedParentData = array()) {
$m3u8Content = file_get_contents($m3u8_realpath);
if (empty($m3u8Content) || strpos($m3u8Content, 'EXTM3U') === false) {
return false;
}
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$lines = preg_split("/[\r\n]/", $m3u8Content);
$newContent = '';
foreach($lines as $index => $line) {
if (strpos($line, '.ts') !== false) {
$newContent .= $this->getRelativePathOfTs($line, $m3u8_realpath, $cachedParentData) . "\n";
}else if (!empty($line)) {
$newContent .= $line . "\n";
}
}
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return $newContent;
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}
//返回ts相对当前m3u8文件的相对路径
//TODO: 支持防盗链
protected function getRelativePathOfTs($ts_filename, $m3u8_realpath, $cachedParentData = array()) {
if (!empty($cachedParentData)) {
$matchedTs = null;
foreach($cachedParentData as $item) {
if (!empty($item['extension']) && $item['extension'] == 'ts' && strpos($item['path'], $ts_filename) !== false) {
$matchedTs = $item;
break;
}
}
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if (!empty($matchedTs)) {
return $matchedTs['path'];
}else {
$webroot = FSC::$app['config']['content_directory'];
$rootDir = __DIR__ . '/../../../www/' . $webroot;
$rootDir = realpath($rootDir);
$m3u8Dir = dirname($m3u8_realpath);
$relativeDir = str_replace("{$rootDir}/", '', $m3u8Dir);
return "/{$webroot}{$relativeDir}/{$ts_filename}";
}
}
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return dirname($m3u8_realpath) . "/{$ts_filename}";
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}
}