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HTML5音频是静态文件时在iOS中说“直播”

audio laravel html5 php

1

Ryan · 技术社区 · 6 年前

对于WindowsChrome(可能还有许多其他浏览器),此代码适用于在 audio

/**
 * 
 * @param string $filename
 * @return \Illuminate\Http\Response|\Illuminate\Contracts\Routing\ResponseFactory
 */
public function getMp3($filename) {
    $fileContents = Storage::disk(\App\Helpers\CoachingCallsHelper::DISK)->get($filename);
    $fileSize = Storage::disk(\App\Helpers\CoachingCallsHelper::DISK)->size($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;
}

但当我用iPhone浏览同一页面时,mp3文件并没有显示总的持续时间,当我播放时,它会显示“直播”。

HTML5 <audio> Safari live broadcast vs not )以及我读过的其他文章,但似乎都没有效果。

无论我如何更改标题,mp3在Windows上似乎都能正常工作在iOS上工作。

这里是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>

1 回复 | 直到 6 年前

1

Brad 6 年前

MP3文件没有时间戳,因此没有可以提前知道的固有长度。Chrome只是猜测,基于文件开头的比特率和文件的字节大小。它真的不知道。

此外,由于苹果的一些限制性政策,iOS上的所有浏览器都是隐藏的Safari。因此,iOS上的Chrome实际上只是一个Safari web视图的包装器。

2

1

Ryan 6 年前

哇,那是个很难解决的问题。(我花了好几天时间。)

现在我想我测试过的每一款浏览器都能正常工作。

我真的很高兴我发现 this example 跟随。

我的答案是:

/**
 * 
 * @param string $disk
 * @param string $filename
 * @return \Illuminate\Http\Response|\Illuminate\Contracts\Routing\ResponseFactory|\Symfony\Component\HttpFoundation\StreamedResponse
 */
public static function getMediaFile($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  $responseHeaders
 * @return \Symfony\Component\HttpFoundation\StreamedResponse
 */
public static function getResponseStream($disk, $fullFilePath, $fileContents, $rangeRequestHeader, $responseHeaders) {
    $stream = Storage::disk($disk)->readStream($fullFilePath);
    $fileSize = strlen($fileContents);
    $fileSizeMinusOneByte = $fileSize - 1; //because it is 0-indexed. https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.16
    list($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;
}