Download fails on files greater than 10M

empiresolutions

Using the following code, files greater than 10Megs do not download. Less than 10 is working. Can anyone explain why? Files that will be downloaded are 5G plus in size.

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    function download() {
 
        global $_GET;
 
        //Gather relevent info about file

        $file = "/user/dac420/tts/incoming/".$_GET['name'];

        $len = filesize($file);

        $filename = basename($file);

        $file_extension = strtolower(substr(strrchr($filename,"."),1));
 
        // Determine correct MIME type

        switch($file_extension){
 
            case "asf":     $ctype = "video/x-ms-asf";                break;

            case "avi":     $ctype = "video/x-msvideo";               break;

            case "exe":     $ctype = "application/octet-stream";      break;

            case "mov":     $ctype = "video/quicktime";               break;

            case "mp3":     $ctype = "audio/mpeg";                    break;

            case "mpg":     $ctype = "video/mpeg";                    break;

            case "mpeg":    $ctype = "video/mpeg";                    break;

            case "rar":     $ctype = "encoding/x-compress";           break;

            case "txt":     $ctype = "text/plain";                    break;

            case "wav":     $ctype = "audio/wav";                     break;

            case "wma":     $ctype = "audio/x-ms-wma";                break;

            case "wmv":     $ctype = "video/x-ms-wmv";                break;

            case "zip":     $ctype = "application/x-zip-compressed";  break;

            default:        $ctype = "application/force-download";    break;
 
        }
 
        //Begin writing headers

        header("Cache-Control:");

        header("Cache-Control: public");
 
        //Use the switch-generated Content-Type

        header("Content-Type: $ctype");
 
        if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) {

            # workaround for IE filename bug with multiple periods / multiple dots in filename

            # that adds square brackets to filename - eg. setup.abc.exe becomes setup[1].abc.exe

            $iefilename = preg_replace('/\./', '%2e', $filename, substr_count($filename, '.') - 1);

            header("Content-Disposition: attachment; filename=\"$iefilename\"");

        } else {

            header("Content-Disposition: attachment; filename=\"$filename\"");

        }
 
        header("Accept-Ranges: bytes");
 
        $size=filesize($file);
 
        //check if http_range is sent by browser (or download manager)

        if(isset($_SERVER['HTTP_RANGE'])) {
 
            list($a, $range)=explode("=",$_SERVER['HTTP_RANGE']);
 
            //if yes, download missing part

            str_replace($range, "-", $range);

            $size2=$size-1;

            $new_length=$size2-$range;
 
            header("HTTP/1.1 206 Partial Content");

            header("Content-Length: $new_length");

            header("Content-Range: bytes $range$size2/$size");
 
        } else {
 
            $size2=$size-1;

            header("Content-Range: bytes 0-$size2/$size");

            header("Content-Length: ".$size);
 
        }
 
        //open the file

        $fp=fopen("$file","rb");
 
        //seek to start of missing part

        fseek($fp,$range);
 
        //start buffered download

        while(!feof($fp)){
 
            //reset time limit for big files

            set_time_limit(0);
 
            print(fread($fp,filesize($file)));

            flush();

            ob_flush();
 
        }
 
        fclose($fp);

        exit;
 
    }

MarkoKlacar

Hi,

Did you set any limit to the file size in the form you use to upload the files?

empiresolutions

The solution is to split the file into chunks when sending. Thanks to everyone for your suggestions.

replace the while() in my above code.

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     //start buffered download

    while(!feof($fp)){
 
        $total     = filesize($file);

        $sent      = 0;

        $blocksize = (2 << 20); //2M chunks

        $handle    = fopen($file, "r");
 
        // Now we need to loop through the file and echo out chunks of file data

        // Dumping the whole file fails at > 30M!

        while($sent < $total){

            echo fread($handle, $blocksize);

            $sent += $blocksize;

        }
 
        exit(0);

        @flush();

        @ob_flush();

    }

empiresolutions

So now that I have the download working I need to know why the page is not refreshing at the end of the script. The download happen, then nothing. How do i get the page to continue after download?

MarkoKlacar

Quote:

Originally Posted by empiresolutions

So now that I have the download working I need to know why the page is not refreshing at the end of the script. The download happen, then nothing. How do i get the page to continue after download?

Hi,

What you can do is send the user to the correct page using header.

Good luck

Markus

Nothing greatly important here but, you don't need to globalise GET as it is already a SUPERGLOBAL.

Is that correct?

empiresolutions

Quote:

Originally Posted by MarkoKlacar

Hi,

What you can do is send the user to the correct page using header.

Good luck

header() is not working after the feof() call

Download fails on files greater than 10M

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