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POWhen downloading a binary file with "fwrite" - "0D" bytes disappear
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copied!<p><br> I am testing <a href="https://stackoverflow.com/questions/4000483/how-download-big-file-using-php-low-memory-usage">this code</a> to download big files in 10 MB chunks:</p> <pre><code>/** * Copy remote file over HTTP one small chunk at a time. * * @param $infile The full URL to the remote file * @param $outfile The path where to save the file */ function copyfile_chunked($infile, $outfile) { $chunksize = 10 * (1024 * 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 += $bytes; /** * We're done reading when we've reached the conent length */ if ($cnt >= $length) break; } fclose($i_handle); fclose($o_handle); return $cnt; } </code></pre> <p>I am testing this code on a small image first. The image gets downloaded to my account, but in a currupted form: all the bytes seem correct exept "0D" bytes are removed from the downloaded image, which renders it unusable. <br> Why is this happening and how I can overcome it? <br> Thanks!</p>

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