Objective-C and Cocoa: Human-readable file size from number of bytes

maximile (Max Williams) — Sun, 26 Nov 2006 05:51:40 GMT

// Returns a human-readable string showing the file size from the number of bytes



- (NSString *)stringFromFileSize:(int)theSize

{

	float floatSize = theSize;

	if (theSize<1023)

		return([NSString stringWithFormat:@"%i bytes",theSize]);

	floatSize = floatSize / 1024;

	if (floatSize<1023)

		return([NSString stringWithFormat:@"%1.1f KB",floatSize]);

	floatSize = floatSize / 1024;

	if (floatSize<1023)

		return([NSString stringWithFormat:@"%1.1f MB",floatSize]);

	floatSize = floatSize / 1024;



	// Add as many as you like



	return([NSString stringWithFormat:@"%1.1f GB",floatSize]);

}

Get remote filesize (HTTP HEAD)

pforret (Peter Forret) — Fri, 20 Jan 2006 02:48:59 GMT

// because HTTP HEAD does not work properly in a lot of PHP versions
// can be used to get remote size of a URL (MP3 file, movie, ...)
// without actually downloading the whole thing (e.g. when it's more than 1MB)



function remote_file_size ($url){ 

	$head = ""; 

	$url_p = parse_url($url); 

	$host = $url_p["host"]; 

	if(!preg_match("/[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*/",$host)){

		// a domain name was given, not an IP

		$ip=gethostbyname($host);

		if(!preg_match("/[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*/",$ip)){

			//domain could not be resolved

			return -1;

		}

	}

	$port = intval($url_p["port"]); 

	if(!$port) $port=80;

	$path = $url_p["path"]; 

	//echo "Getting " . $host . ":" . $port . $path . " ...";



	$fp = fsockopen($host, $port, $errno, $errstr, 20); 

	if(!$fp) { 

		return false; 

		} else { 

		fputs($fp, "HEAD "  . $url  . " HTTP/1.1\r\n"); 

		fputs($fp, "HOST: " . $host . "\r\n"); 

		fputs($fp, "User-Agent: http://www.example.com/my_application\r\n");

		fputs($fp, "Connection: close\r\n\r\n"); 

		$headers = ""; 

		while (!feof($fp)) { 

			$headers .= fgets ($fp, 128); 

			} 

		} 

	fclose ($fp); 

	//echo $errno .": " . $errstr . "
";

	$return = -2; 

	$arr_headers = explode("\n", $headers); 

	// echo "HTTP headers for ..." . substr($url,strlen($url)-20). ":";

	// echo "";

	foreach($arr_headers as $header) { 

		// if (trim($header)) echo trim($header) . "
";

		$s1 = "HTTP/1.1"; 

		$s2 = "Content-Length: "; 

		$s3 = "Location: "; 

		if(substr(strtolower ($header), 0, strlen($s1)) == strtolower($s1)) $status = substr($header, strlen($s1)); 

		if(substr(strtolower ($header), 0, strlen($s2)) == strtolower($s2)) $size   = substr($header, strlen($s2));  

		if(substr(strtolower ($header), 0, strlen($s3)) == strtolower($s3)) $newurl = substr($header, strlen($s3));  

		} 

	// echo "";

	if(intval($size) > 0) {

		$return=intval($size);

	} else {

		$return=$status;

	}

	// echo intval($status) .": [" . $newurl . "]
";

	if (intval($status)==302 && strlen($newurl) > 0) {

		// 302 redirect: get HTTP HEAD of new URL

		$return=remote_file_size($newurl);

	}

	return $return; 

}

DZone Snippets: filesize code

Objective-C and Cocoa: Human-readable file size from number of bytes

Get remote filesize (HTTP HEAD)