对于mp3的HTML5音频持续时间始终是无限

Question

我正在玩我的宠物项目，并尝试用PHP“流媒体”，我总是得到音频持续时间返回Infinity。我试图在许多地方搜索，不幸的是，我似乎无法找到根本问题。

请注意，我不得不把这个项目搁置一段时间，一切都很好。当我重新开始工作时，我做了一些UI重构，并发现了这个“bug”。任何人都可以发现我的代码有问题吗？

上下文：这是在一个控制器（ZF2）的行动，其中$media是一个POPO模型。

$file = $basePath . $media->getFileName(); 
$fileSize = filesize($file); 
$fileHandle = fopen($file, 'r'); 

$etag = md5(serialize(fstat($fileHandle))); 
$cacheExpires = new \DateTime(); 

// TODO : implement ranges... 
if (isset($_SERVER['HTTP_RANGE'])) { 

    // find the requested range 
    // this might be too simplistic, apparently the client can request 
    // multiple ranges, which can become pretty complex, so ignore it for now 
    preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches); 

    $rangeFrom = intval($matches[1]); 
    $rangeTo = intval($matches[2]); 

    $statusCode = 206; 
} else { 
    $rangeFrom = 0; 
    $rangeTo = $fileSize; 
    $statusCode = 200; 
} 

fseek($fileHandle, $rangeFrom); 

set_time_limit(0); // try to disable time limit 

$response = new Stream(); 
$response->setStream($fileHandle); 
$response->setStatusCode($statusCode); 
$response->setStreamName(basename($file)); 

$headers = new Headers(); 
$headers->addHeaders(array(
    'Pragma' => 'public', 
    'Expires' => $cacheExpires->format('Y/m/d H:i:s'), 
    'Cache-Control' => 'no-cache', 
    'Accept-Ranges' => 'bytes', 
    'Content-Description' => 'File Transfer', 
    'Content-Transfer-Encoding' => 'binary', 
    'Content-Disposition' => 'attachment; filename="' . basename($file) .'"', 
    'Content-Type' => 'audio/mpeg, audio/x-mpeg, audio/x-mpeg-3, audio/mpeg3', // $media->getFileType(), 
    'Content-Range' => "bytes {$rangeFrom}-{$rangeTo}/{$fileSize}", 
    'Content-Length' => $fileSize, 
    'Etag' => $etag, 
    'X-Pad' => 'avoid browser bug', 
)); 
$response->setHeaders($headers); 
return $response; 

我曾尝试与几乎所有的报头字段（即使删除范围）打，但是浏览器总是得到isFinite(audio.duration) === false。其他一切似乎都起作用，包括播放，完美无瑕。

Answer 1

我终于找到了我的解决方案here。我不得不稍微更改代码，以下是更改。现在，如果我可以完全支持多个范围，它将会完成。

（因为我看到的是不完整的答案，我在此分享，希望，它也将帮助别人了。）

$file = $basePath . $media->getFileName(); 
$fileSize = filesize($file); 
$fileTime = date('r', filemtime($file)); 
$fileHandle = fopen($file, 'r'); 

$rangeFrom = 0; 
$rangeTo = $fileSize - 1; 
$etag = md5(serialize(fstat($fileHandle))); 
$cacheExpires = new \DateTime(); 


if (isset($_SERVER['HTTP_RANGE'])) { 
    if (!preg_match('/^bytes=\d*-\d*(,\d*-\d*)*$/i', $_SERVER['HTTP_RANGE'])) { 
     $statusCode = 416; 
    } else { 
     $ranges = explode(',', substr($_SERVER['HTTP_RANGE'], 6)); 
     foreach ($ranges as $range) { 
      $parts = explode('-', $range); 

      $rangeFrom = intval($parts[0]); // If this is empty, this should be 0. 
      $rangeTo = intval($parts[1]); // If this is empty or greater than than filelength - 1, this should be filelength - 1. 

      if (empty($rangeTo)) $rangeTo = $fileSize - 1; 

      if (($rangeFrom > $rangeTo) || ($rangeTo > $fileSize - 1)) { 
       $statusCode = 416; 
      } else { 
       $statusCode = 206; 
      } 
     } 
    } 
} else { 
    $statusCode = 200; 
} 

if ($statusCode == 416) { 
    $response = $this->getResponse(); 

    $response->setStatusCode(416); // HTTP/1.1 416 Requested Range Not Satisfiable 
    $response->addHeaderLine('Content-Range', "bytes */{$fileSize}"); // Required in 416. 

} else { 

    fseek($fileHandle, $rangeFrom); 

    set_time_limit(0); // try to disable time limit 

    $response = new Stream(); 
    $response->setStream($fileHandle); 
    $response->setStatusCode($statusCode); 
    $response->setStreamName(basename($file)); 

    $headers = new Headers(); 
    $headers->addHeaders(array(
     'Pragma' => 'public', 
     'Expires' => $cacheExpires->format('Y/m/d H:i:s'), 
     'Cache-Control' => 'no-cache', 
     'Accept-Ranges' => 'bytes', 
     'Content-Description' => 'File Transfer', 
     'Content-Transfer-Encoding' => 'binary', 
     'Content-Disposition' => 'attachment; filename="' . basename($file) .'"', 
     'Content-Type' => 'audio/mpeg, audio/x-mpeg, audio/x-mpeg-3, audio/mpeg3', // $media->getFileType(), 
     'Content-Length' => $fileSize, 
     'Last-Modified' => $fileTime, 
     'Etag' => $etag, 
     'X-Pad' => 'avoid browser bug', 
    )); 

    if ($statusCode == 206) { 
     $headers->addHeaderLine('Content-Range', "bytes {$rangeFrom}-{$rangeTo}/{$fileSize}"); 
    } 

    $response->setHeaders($headers); 
} 

return $response;