Make mp3 seekable PHP

I did this PHP script

    $file_name = 'sample.mp3';

    header('Content-Type: audio/mpeg');

    $opts     = array('http' =>
                      array(
                          'method'           => 'GET',
                          'protocol_version' => 1.1,
                      )
    );
    $context  = stream_context_create($opts);
    $stream   = fopen($file_name, 'rb', FALSE, $context);
    $metadata = stream_get_meta_data($stream);
    $data     = stream_get_contents($stream);
    print($data);
    fclose($stream);

It could stream mp3 media successfully but I'm not able to seek the mp3 file that get played also in html5 video tags are not able to extract metadata from it, please tell me where I'm doing wrong and how to make this process work, thanks

---

在这里试试这个，支持部分下载和寻找任何文件大小，现在也可以在Chrome中正常工作：

<?php 
$file_name = './sample.mp3';
stream($file_name, 'audio/mpeg');

/**
 * Stream-able file handler
 *
 * @param String $file_location
 * @param Header|String $content_type
 * @return content
 */
function stream($file, $content_type = 'application/octet-stream') {
    @error_reporting(0);

    // Make sure the files exists, otherwise we are wasting our time
    if (!file_exists($file)) {
        header("HTTP/1.1 404 Not Found");
        exit;
    }

    // Get file size
    $filesize = sprintf("%u", filesize($file));

    // Handle 'Range' header
    if(isset($_SERVER['HTTP_RANGE'])){
        $range = $_SERVER['HTTP_RANGE'];
    }elseif($apache = apache_request_headers()){
        $headers = array();
        foreach ($apache as $header => $val){
            $headers[strtolower($header)] = $val;
        }
        if(isset($headers['range'])){
            $range = $headers['range'];
        }
        else $range = FALSE;
    } else $range = FALSE;

    //Is range
    if($range){
        $partial = true;
        list($param, $range) = explode('=',$range);
        // Bad request - range unit is not 'bytes'
        if(strtolower(trim($param)) != 'bytes'){ 
            header("HTTP/1.1 400 Invalid Request");
            exit;
        }
        // Get range values
        $range = explode(',',$range);
        $range = explode('-',$range[0]); 
        // Deal with range values
        if ($range[0] === ''){
            $end = $filesize - 1;
            $start = $end - intval($range[0]);
        } else if ($range[1] === '') {
            $start = intval($range[0]);
            $end = $filesize - 1;
        }else{ 
            // Both numbers present, return specific range
            $start = intval($range[0]);
            $end = intval($range[1]);
            if ($end >= $filesize || (!$start && (!$end || $end == ($filesize - 1)))) $partial = false; // Invalid range/whole file specified, return whole file
        }
        $length = $end - $start + 1;
    }
    // No range requested
    else $partial = false; 

    // Send standard headers
    header("Content-Type: $content_type");
    header("Content-Length: " . ($partial ? $length : $filesize));
    header('Accept-Ranges: bytes');

    // send extra headers for range handling...
    if ($partial) {
        header('HTTP/1.1 206 Partial Content');
        header("Content-Range: bytes $start-$end/$filesize");
        if (!$fp = fopen($file, 'rb')) {
            header("HTTP/1.1 500 Internal Server Error");
            exit;
        }
        if ($start) fseek($fp,$start);
        while($length){
            set_time_limit(0);
            $read = ($length > 8192) ? 8192 : $length;
            $length -= $read;
            print(fread($fp,$read));
        }
        fclose($fp);
    }
    //just send the whole file
    else readfile($file);
    exit;
}
?>

---

This should hopefully fix your problem, follow this method.

What you need to do is use readfile() and set file_exists() so that you can tell you're opening the correct file.

$extension = "mp3";
$mime_type = "audio/mpeg, audio/x-mpeg, audio/x-mpeg-3, audio/mpeg3";

if(file_exists($file_name)){
    header('Content-type: {$mime_type}');
    header('Content-length: ' . filesize($file_name));
    header('Content-Disposition: filename="' . $file_name);
    header('X-Pad: avoid browser bug');
    header('Cache-Control: no-cache');
    readfile($file_name);
}

Reference

链接地址: http://www.djcxy.com/p/87300.html

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