Function $file_range

index.js:18583–18626

(name, range, headers, res)

}

function $file_range(name, range, headers, res) {

	var arr = range.replace(REG_RANGE, '').split('-');
	var beg = +arr[0] || 0;
	var end = +arr[1] || 0;
	var total = F.temporary.range[name];

	if (!total) {
		total = Fs.statSync(name).size;
		RELEASE && (F.temporary.range[name] = total);
	}

	if (end === 0)
		end = total - 1;

	if (beg > end) {
		beg = 0;
		end = total - 1;
	}

	if (end > total)
		end = total - 1;

	var length = (end - beg) + 1;

	headers[HEADER_LENGTH] = length;
	headers['Content-Range'] = 'bytes ' + beg + '-' + end + '/' + total;

	var req = res;
	F.stats.response.streaming++;

	if (req.method === 'HEAD') {
		res.writeHead(206, headers);
		res.end();
		response_end(res);
		return F;
	}

	res.writeHead(206, headers);
	RANGE.start = beg;
	RANGE.end = end;
	fsStreamRead(name, RANGE, $file_range_callback, res);
	return F;
}

function $file_range_callback(stream, next, res) {
	framework_internal.onFinished(res, function() {