Download mit cURL inklusive Fortschritt: Unsinnige Werte

<?php
	header("Content-type: text/plain; charset=windows-1252");

	global $next_percent;
	global $next_tenth;
	global $csv;


	$urlpath = "http://webcdn.triongames.com/addons/assets/";


	function file_get_contents_curl($url) # only for small files like the directory index
	{
		$ch = curl_init();


		curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);       
		curl_setopt($ch, CURLOPT_HEADER, FALSE);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
		curl_setopt($ch, CURLOPT_URL, $url);


		$data = curl_exec($ch);
		curl_close($ch);


		return $data;
	}


	function file_get_size_curl($url)
	{
		$ch = curl_init($url);


		curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);       
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
		curl_setopt($ch, CURLOPT_HEADER, TRUE);
		curl_setopt($ch, CURLOPT_NOBODY, TRUE);


		$data = curl_exec($ch);
		$size = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);


		curl_close($ch);
		return $size;
	}


	function progress($resource, $to_download, $downloaded, $to_upload=0, $uploaded=0)
	{
		global $next_percent;
		global $next_tenth;
		global $csv;


		$percent = -1;
		$tenth = -1;
		fwrite($csv, "$to_download,$downloaded,$to_upload,$uploaded,$percent,$next_percent,$tenth,$next_tenth\r\n");
		if($to_download > 0)
		{
			$percent = intval($downloaded * 100 / $to_download);
			$tenth = intval($percent / 10);
			if($tenth >= $next_tenth)
			{
				$next_tenth++;
				$next_percent++;
				echo " ".$tenth."0%\r\n";
			}
			else if($percent >= $next_percent)
			{
				$next_percent++;
				echo ".";
			}
			flush();
		}
		flush();
	}


	echo "Getting directory content list from TRION assets archive... ";
	$contents = file_get_contents_curl($urlpath);
	flush();
	if($contents === false)
	{
		die("ERROR: RIFT directory '$urlpath' not readable from TRION data server.\r\n");
	}

	echo "OK\r\nSearching current discoveries archive... ";
	flush();
	preg_match_all("|href=[\''](.*?)[\'']|", $contents, $_dirlist);


	foreach($_dirlist[1] as $fname)
	{
		$fnmask = "Rift_Discoveries_*.zip";
		if(fnmatch($fnmask, $fname))
		{
			echo "OK, found $fname\r\n";
			flush();
			if(file_exists($fname))
				echo "Local file already exists.";
			else
			{
				@array_map("unlink", glob($fnmask)); # delete all possibly left older archive files if a new current file was not yet cached


				$rsize = file_get_size_curl($urlpath.$fname);
				echo "Downloading $fname (".number_format($rsize, 0)." bytes):\r\n";
				$next_tenth = 1;
				$next_percent = 1;
				$of = fopen($fname, "w+");
				$csv = fopen("downloadlog.csv", "w+");
				fwrite($csv, '"to download","downloaded","to_upload","uploaded","percent","next_percent","tenth","next_tenth"'."\r\n");
				$ch = curl_init();
				curl_setopt($ch, CURLOPT_URL, $urlpath.$fname); # remote source file to be downloaded
				curl_setopt($ch, CURLOPT_FILE, $of); # write downloaded data to file
				# curl_setopt($ch, CURLOPT_BUFFERSIZE, 8192);
				# curl_setopt($ch, CURLOPT_TIMEOUT, 600);
				curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, 'progress'); # callback
				curl_setopt($ch, CURLOPT_NOPROGRESS, FALSE); # enable use of callback
				curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); # do not write downloaded data to stdout
				curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE); # follow possible redirects
				curl_setopt($ch, CURLOPT_HEADER, FALSE); # do not write header to output file
				curl_setopt($ch, CURLOPT_VERBOSE, TRUE); # debug, outputs header and possible download errors to stderr
				$result = curl_exec($ch);
				curl_close($ch);
				fclose($of);
				fclose($csv);
			}
		}
	}
	# ftp_close($ftp_stream);
	echo "ERROR: No discoveries archive found.\r\n";
?>