Re: IE 'hangs' when I try to display an uploaded file

On Jun 14, 3:19 am, tomhawki...@xxxxxxxxx wrote:
Hi

I currently have a site where users can upload files. These files can
be doc, wmv, jpeg, xls, dwf, dwf and dwg.

These files are uploaded to /home/**user**/uploads and not /home/
**user**/public_html/uploads to prevent any old user from browsing
them.

I then use a general showDoc page with the following function (from
php.net)

function readfile_chunked($filename,$retbytes=true) {
                $chunksize = 1*(1024*1024); // how many bytes per chunk
                $buffer = '';
                $cnt =0;
                // $handle = fopen($filename, 'rb');
                $handle = fopen($filename, 'rb');
                if ($handle === false) {
                        return false;
                }
                while (!feof($handle)) {
                        $buffer = fread($handle, $chunksize);
                        echo $buffer;
                        ob_flush();
                        flush();
                        if ($retbytes) {
                                $cnt += strlen($buffer);
                        }
                }
                $status = fclose($handle);
                if ($retbytes && $status) {
                        return $cnt; // return num.. bytes delivered like readfile() does.
                }
                return $status;

        }

which is called here

        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Cache-Control: private",false);
        header("Content-Type: $ctype");
        header("Content-Disposition: inline; filename=
\"".basename($filename)."\";" );
        header("Content-Transfer-Encoding: binary");
        header("Content-Length: ".filesize($filename));
        readfile_chunked("$filename");
        exit();

Now, if I have a file of more than about 3MB (tried with a wmv and
dxf), it won't show, and my whole site becomes unresponsive to any
input until I close the browser, open IE again and log in again.
filename and ctype must be being passed correctly but the size of the
file seems to make it hang. I have succeded in uploading files of up
to 15MB but the larger ones won't display!

Any ideas?

TomH

Try "Content-Disposition: attachment;......"
It will show the open/save dialog box in IE
.

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