fix: run setHeaders within dev mode

- Closes #22

Author: lukeed

packages/sirv/index.js

@@ -76,16 +76,17 @@ module.exports = function (dir, opts={}) {
 
 	let isNotFound = opts.onNoMatch || is404;
 	let extensions = opts.extensions || ['html', 'htm'];
+	let setHeaders = opts.setHeaders || noop;
 
 	if (opts.dev) {
 		return function (req, res, next) {
-			let [start=0, end=Infinity] = (req.headers.range || '').replace('bytes=', '').split('-');
 			let uri = decodeURIComponent(req.path || req.pathname || parser(req).pathname);
 			let arr = uri.includes('.') ? [uri] : toAssume(uri, extensions);
 			let file = arr.map(x => join(dir, x)).find(fs.existsSync);
 			if (!file) return next ? next() : isNotFound(res);
 
 			let stats = fs.statSync(file);
+			setHeaders(res, uri, stats);
 			send(req, res, file, stats, {
 				'Content-Type': mime.getType(file),
 				'Last-Modified': stats.mtime.toUTCString(),
@@ -94,7 +95,6 @@ module.exports = function (dir, opts={}) {
 		}
 	}
 
-	let setHeaders = opts.setHeaders || noop;
 	let cc = opts.maxAge != null && `public,max-age=${opts.maxAge}`;
 	if (cc && opts.immutable) cc += ',immutable';