gulp-webserver : middleware for support post

gulpfile.js

var gulp = require('gulp'),
	fs = require('fs'),
	path = require('path'),
	webserver = require('gulp-webserver');

gulp.task('server', function() {
	var dist = './dist';

	return gulp.src(dist).pipe(webserver({
		host: '0.0.0.0',
		port: 4000,
		livereload: false,
		directoryListing: {
			enable: false,
			path: dist
		},
		middleware: [
			(req, res, next) => {
				var filepath = path.join(path.resolve(__dirname), dist, req.url);

				if (
					'POSTPUTDELETE'.indexOf(req.method.toUpperCase()) > -1
					&& fs.existsSync(filepath) 
					&& fs.statSync(filepath).isFile()
				) {
					res.end(fs.readFileSync(filepath));
				}
				
				next();
			}
		],
		open: false
	}));
});