Function serve

lib/plugins/static.js:167–219

(req, res, next)

    }

    function serve(req, res, next) {
        var file;

        if (opts.file) {
            //serves a direct file
            file = path.join(opts.directory, decodeURIComponent(opts.file));
        } else if (opts.appendRequestPath) {
            file = path.join(opts.directory, decodeURIComponent(req.path()));
        } else {
            var dirBasename = path.basename(opts.directory);
            var reqpathBasename = path.basename(req.path());

            if (
                path.extname(req.path()) === '' &&
                dirBasename === reqpathBasename
            ) {
                file = opts.directory;
            } else {
                file = path.join(
                    opts.directory,
                    decodeURIComponent(path.basename(req.path()))
                );
            }
        }

        if (req.method !== 'GET' && req.method !== 'HEAD') {
            next(new MethodNotAllowedError('%s', req.method));
            return;
        }

        if (!re.test(file.replace(/\\/g, '/'))) {
            next(new NotAuthorizedError('%s', req.path()));
            return;
        }

        if (opts.match && !opts.match.test(file)) {
            next(new NotAuthorizedError('%s', req.path()));
            return;
        }

        if (opts.gzip && req.acceptsEncoding('gzip')) {
            fs.stat(file + '.gz', function stat(err, stats) {
                if (!err) {
                    res.setHeader('Content-Encoding', 'gzip');
                    serveFileFromStats(file, err, stats, true, req, res, next);
                } else {
                    serveNormal(file, req, res, next);
                }
            });
        } else {
            serveNormal(file, req, res, next);
        }
    }

    return serve;
}