So I am trying to transfer/copy a large file from a remote server to my server in separate parts or chunks. I tried the script provided here: https://stackoverflow.com/a/4000569/7559794 I made some changes and gave a form to the script and used AJAX to communicate with PHP script as follows: The index.html contains a form with POST method and a submit button that calls the following function OnClick:
<script> function stratdown() { var partsizevalue = $('#psize').val(); var dfilename = $('#dfile').val(); var sfilename = $('#sfile').val(); $.ajax({ type: "POST", url: 'trigger.php', data:{dfile: dfilename, sfile: sfilename, psize: partsizevalue}, //{value: a, cID: cID} success:function(result) { alert(result); } }); }</script> the file trigger.php contains the following script:
<?php require 'partdown.php'; $infile = $_POST["dfile"]; $outfile = $_POST["sfile"]; $partsize = $_POST["psize"]; echo $mesg = DownInParts::copyfile_chunked($infile, $outfile, $partsize); ?> and the required partdown.php contains:
<?php /** * Copy remote file over HTTP one small chunk at a time. * * @param $infile The full URL to the remote file * @param $outfile The path where to save the file */ class DownInParts { public function copyfile_chunked($infile, $outfile, $partsize) { $chunksize = $partsize * 1024; // 10 Megs /** * parse_url breaks a part a URL into it's parts, i.e. host, path, * query string, etc. */ $parts = parse_url($infile); $i_handle = fsockopen($parts['host'], 80, $errstr, $errcode, 5); $o_handle = fopen($outfile, 'wb'); if ($i_handle == false || $o_handle == false) { return false; } if (!empty($parts['query'])) { $parts['path'] .= '?' . $parts['query']; } /** * Send the request to the server for the file */ $request = "GET {$parts['path']} HTTP/1.1\r\n"; $request .= "Host: {$parts['host']}\r\n"; $request .= "User-Agent: Mozilla/5.0\r\n"; $request .= "Keep-Alive: 115\r\n"; $request .= "Connection: keep-alive\r\n\r\n"; fwrite($i_handle, $request); /** * Now read the headers from the remote server. We'll need * to get the content length. */ $headers = array(); while(!feof($i_handle)) { $line = fgets($i_handle); if ($line == "\r\n") break; $headers[] = $line; } /** * Look for the Content-Length header, and get the size * of the remote file. */ $length = 0; foreach($headers as $header) { if (stripos($header, 'Content-Length:') === 0) { $length = (int)str_replace('Content-Length: ', '', $header); break; } } /** * Start reading in the remote file, and writing it to the * local file one chunk at a time. */ $cnt = 0; while(!feof($i_handle)) { $buf = ''; $buf = fread($i_handle, $chunksize); $bytes = fwrite($o_handle, $buf); if ($bytes == false) { return false; } $cnt += $bytes; /** * We're done reading when we've reached the content length */ if ($cnt >= $length) break; } fclose($i_handle); fclose($o_handle); return $cnt; } } ?> I didn't manage to make it function. I have however tried to add the action "trigger.php" to the form in order to call PHP directly yet The file I downloaded was (0 Kb) in size. Any ideas.
