问题描述

对于 Windows Chrome(可能还有许多其他浏览器)，此代码适用于在 audio 元素中提供 mp3:

For Windows Chrome (and probably many other browsers), this code works for serving an mp3 in an audio element:

/**
 * 
 * @param string $filename
 * @return IlluminateHttpResponse|IlluminateContractsRoutingResponseFactory
 */
public function getMp3($filename) {
    $fileContents = Storage::disk(AppHelpersCoachingCallsHelper::DISK)->get($filename);
    $fileSize = Storage::disk(AppHelpersCoachingCallsHelper::DISK)->size($filename);
    $shortlen = $fileSize - 1;
    $headers = [
        'Accept-Ranges' => 'bytes',
        'Content-Range' => 'bytes 0-' . $shortlen . '/' . $fileSize,
        'Content-Type' => "audio/mpeg"
    ];
    Log::debug('$headers=' . json_encode($headers));
    $response = response($fileContents, 200, $headers);
    return $response;
}

但是当我用iPhone浏览同一页面时，mp3文件没有显示总时长，播放时显示直播".

But when I use an iPhone to browse to the same page, the mp3 file does not show the total duration, and when I play it, it says "Live broadcast".

我试图遵循这个问题的各种答案的建议 (HTML5<audio> Safari live broadcast vs not) 和我读过的其他文章，但似乎都没有效果.

I've tried to follow suggestions from various answers of this question (HTML5 <audio> Safari live broadcast vs not) and other articles I've read, but none seem to have an effect.

无论我如何更改标题，mp3 似乎在 Windows 上都能正常运行，而在 iOS 上不能运行.

No matter how I change the headers, the mp3 seems to function as desired on Windows and does not work on iOS.

如何调试我做错的地方?

How can I debug what I'm doing wrong?

这是 HTML:

<audio controls preload="auto">
    <source src="{{$coachingCall->getMp3Url()}}" type="audio/mpeg"/>
    <p>Your browser doesnt support embedded HTML5 audio. Here is a <a href="{{$coachingCall->getMp3Url()}}">link to the audio</a> instead.</p>
</audio>

推荐答案

哇，这是一个很难解决的问题.(我花了几天时间.)

Whoa, that was a very difficult problem to solve. (It took me days.)

而且我了解到不仅仅是 iOS 出现问题:Mac 上的 Safari 也无法正常工作.

And I learned that it wasn't just iOS that was having problems: Safari on Mac hadn't been working either.

现在我认为一切都适用于我测试过的每个浏览器.

Now I think everything works on every browser I've tested.

我真的很高兴我找到了这个例子来效仿.

I'm really glad I found this example to follow.

这是我的答案:

/**
 * 
 * @param string $disk
 * @param string $filename
 * @return IlluminateHttpResponse|IlluminateContractsRoutingResponseFactory|SymfonyComponentHttpFoundationStreamedResponse
 */
public static function getMediaFile($disk, $filename) {
    $rangeHeader = request()->header('Range');
    $fileContents = Storage::disk($disk)->get($filename);
    $fullFilePath = Storage::disk($disk)->path($filename); //https://stackoverflow.com/a/49532280/470749
    $headers = ['Content-Type' => Storage::disk($disk)->mimeType($fullFilePath)];
    if ($rangeHeader) {
        return self::getResponseStream($disk, $fullFilePath, $fileContents, $rangeHeader, $headers);
    } else {
        $httpStatusCode = 200;
        return response($fileContents, $httpStatusCode, $headers);
    }
}

/**
 * 
 * @param string $disk
 * @param string $fullFilePath
 * @param string $fileContents
 * @param string $rangeRequestHeader
 * @param array  $responseHeaders
 * @return SymfonyComponentHttpFoundationStreamedResponse
 */
public static function getResponseStream($disk, $fullFilePath, $fileContents, $rangeRequestHeader, $responseHeaders) {
    $stream = Storage::disk($disk)->readStream($fullFilePath);
    $fileSize = strlen($fileContents);
    $fileSizeMinusOneByte = $fileSize - 1; //because it is 0-indexed. http://www.51sjk.com/Upload/Articles/1/0/338/338601_20221208100101251.16
    list($param, $rangeHeader) = explode('=', $rangeRequestHeader);
    if (strtolower(trim($param)) !== 'bytes') {
        abort(400, "Invalid byte range request"); //Note, this is not how https://stackoverflow.com/a/29997555/470749 did it
    }
    list($from, $to) = explode('-', $rangeHeader);
    if ($from === '') {
        $end = $fileSizeMinusOneByte;
        $start = $end - intval($from);
    } elseif ($to === '') {
        $start = intval($from);
        $end = $fileSizeMinusOneByte;
    } else {
        $start = intval($from);
        $end = intval($to);
    }
    $length = $end - $start + 1;
    $httpStatusCode = 206;
    $responseHeaders['Content-Range'] = sprintf('bytes %d-%d/%d', $start, $end, $fileSize);
    $responseStream = response()->stream(function() use ($stream, $start, $length) {
        fseek($stream, $start, SEEK_SET);
        echo fread($stream, $length);
        fclose($stream);
    }, $httpStatusCode, $responseHeaders);
    return $responseStream;
}