解决express video 手机无法播放的问题

extends layoutblock content
h1= title
p Welcome to #{title}
video(src="/video" controls="controls" type="video/mp4" width="320px" height="480px")

var express = require('express');
var router = express.Router();/* GET users listing. */
router.get('/', function(req, res, next) {
//res.send('respond with a resource');
var fs = require("fs") ; //var video = fs.createReadStream('./public/images/sina.mp4');
//res.set('Content-Type', 'video/mp4');
//video.pipe(res) var file = './public/images/sina.mp4';
fs.stat(file, function(err, stats) {
if (err) {
if (err.code === 'ENOENT') {
// 404 Error if file not found
return res.sendStatus(404);
}
res.end(err);
}
var range = req.headers.range;
if (!range) {
// 416 Wrong range
return res.sendStatus(416);
}
var positions = range.replace(/bytes=/, "").split("-");
var start = parseInt(positions[0], 10);
var total = stats.size;
var end = positions[1] ? parseInt(positions[1], 10) : total - 1;
var chunksize = (end - start) + 1; res.writeHead(206, {
"Content-Range": "bytes " + start + "-" + end + "/" + total,
"Accept-Ranges": "bytes",
"Content-Length": chunksize,
"Content-Type": "video/mp4"
}); var stream = fs.createReadStream(file, { start: start, end: end })
.on("open", function() {
stream.pipe(res);
}).on("error", function(err) {
res.end(err);
});
});});module.exports = router;