solution/fix for video and audio file streaming with readfile and passthru to iphone

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • solution/fix for video and audio file streaming with readfile and passthru to iphone

    this fix is for those of you who use readfile or passthru method to deliver mobile content to devices,
    i had a problem like this at xchanger.mobi so that i couldnt download videos or mp3 files to my iphone,

    and i found a solution for my problem here: Content Delivery for Mobile Devices | mobiForge

    this function fixes it:
    PHP Code:
    <?php
    function rangeDownload($file) {
     
        
    $fp = @fopen($file'rb');
     
        
    $size   filesize($file); // File size
        
    $length $size;           // Content length
        
    $start  0;               // Start byte
        
    $end    $size 1;       // End byte
        // Now that we've gotten so far without errors we send the accept range header
        /* At the moment we only support single ranges.
         * Multiple ranges requires some more work to ensure it works correctly
         * and comply with the spesifications: http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2
         *
         * Multirange support annouces itself with:
         * header('Accept-Ranges: bytes');
         *
         * Multirange content must be sent with multipart/byteranges mediatype,
         * (mediatype = mimetype)
         * as well as a boundry header to indicate the various chunks of data.
         */
        
    header("Accept-Ranges: 0-$length");
        
    // header('Accept-Ranges: bytes');
        // multipart/byteranges
        // http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2
        
    if (isset($_SERVER['HTTP_RANGE'])) {
     
            
    $c_start $start;
            
    $c_end   $end;
            
    // Extract the range string
            
    list(, $range) = explode('='$_SERVER['HTTP_RANGE'], 2);
            
    // Make sure the client hasn't sent us a multibyte range
            
    if (strpos($range',') !== false) {
     
                
    // (?) Shoud this be issued here, or should the first
                // range be used? Or should the header be ignored and
                // we output the whole content?
                
    header('HTTP/1.1 416 Requested Range Not Satisfiable');
                
    header("Content-Range: bytes $start-$end/$size");
                
    // (?) Echo some info to the client?
                
    exit;
            }
            
    // If the range starts with an '-' we start from the beginning
            // If not, we forward the file pointer
            // And make sure to get the end byte if spesified
            
    if ($range0 == '-') {
     
                
    // The n-number of the last bytes is requested
                
    $c_start $size substr($range1);
            }
            else {
     
                
    $range  explode('-'$range);
                
    $c_start $range[0];
                
    $c_end   = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $size;
            }
            
    /* Check the range and make sure it's treated according to the specs.
             * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
             */
            // End bytes can not be larger than $end.
            
    $c_end = ($c_end $end) ? $end $c_end;
            
    // Validate the requested range and return an error if it's not correct.
            
    if ($c_start $c_end || $c_start $size || $c_end >= $size) {
     
                
    header('HTTP/1.1 416 Requested Range Not Satisfiable');
                
    header("Content-Range: bytes $start-$end/$size");
                
    // (?) Echo some info to the client?
                
    exit;
            }
            
    $start  $c_start;
            
    $end    $c_end;
            
    $length $end $start 1// Calculate new content length
            
    fseek($fp$start);
            
    header('HTTP/1.1 206 Partial Content');
        }
        
    // Notify the client the byte range we'll be outputting
        
    header("Content-Range: bytes $start-$end/$size");
        
    header("Content-Length: $length");
     
        
    // Start buffered download
        
    $buffer 1024 8;
        while(!
    feof($fp) && ($p ftell($fp)) <= $end) {
     
            if (
    $p $buffer $end) {
     
                
    // In case we're only outputtin a chunk, make sure we don't
                // read past the length
                
    $buffer $end $p 1;
            }
            
    set_time_limit(0); // Reset time limit for big files
            
    echo fread($fp$buffer);
            
    flush(); // Free up memory. Otherwise large files will trigger PHP's memory limit.
        
    }
     
        
    fclose($fp);
     
    }
    ?>
    and here is an example how you can use it:
    PHP Code:
    if(strstr($_SERVER['HTTP_USER_AGENT'],'iPhone') || strstr($_SERVER['HTTP_USER_AGENT'],'iPod') || strstr($_SERVER['HTTP_USER_AGENT'],'iPad'))
     {
      
    rangeDownload($file);
    }
    else
    {
    $fp = @fopen($file,"rb");
    fpassthru($fp);
    fclose($fp);


  • #2
    Some of the N-series Nokia`s standard browser has similar problem

    Comment


    • #3
      Hello,
      I think I got this problem on my server, so can you explain me how to integrate this code in my web site ?
      I have a NAS synology hosting my wordpress web site.
      I'm new on web development so sorry if it's a noob question ;-)

      Comment

      Working...
      X