如何利用moment处理时间戳并计算时间的差值

 var 
 schedule = 
 require(
 'node-schedule');

schedule.scheduleJob('*/15 * * * * * ', function () {
            console.log('timer !!!!!!!!!!');
            var dataObj1 = {};
            iplists.forEach(function (ele, index) {
                var req = Http.request("http://" + ele + ":14567/stat", function (res) {
                    dataObj1.time = new Date(res.headers.date);
                    dataObj1.ip = req.getHeader("host").split(":")[0];
                    res.setEncoding('utf-8');
                    var tempData = '';
                    res.on('data', function (chunk) {
                        tempData += chunk;
                        var resultObj = JSON.parse(tempData);
                        dataObj1.flow = resultObj.bw15s;
                        var flow1 = new flowrank1({
                            ip: dataObj1.ip,
                            flow: dataObj1.flow,
                            time: new Date(dataObj1.time)
                        });
                        flow1.save(function (err, flow1) {
                            if (err) {
                                console.log(err);
                                return;
                            }
                        });
                    });
                });
                req.on("error", function (err) {
                    console.log(err);
                });
                req.end()
            });
        });

moment().startOf('year');    // set to January 1st, 12:00 am this year
moment().startOf('month');   // set to the first of this month, 12:00 am
moment().startOf('quarter');  // set to the beginning of the current quarter, 1st day of months, 12:00 am
moment().startOf('week');    // set to the first day of this week, 12:00 am
moment().startOf('isoWeek'); // set to the first day of this week according to ISO 8601, 12:00 am
moment().startOf('day');     // set to 12:00 am today
moment().startOf('date');     // set to 12:00 am today
moment().startOf('hour');    // set to now, but with 0 mins, 0 secs, and 0 ms
moment().startOf('minute');  // set to now, but with 0 seconds and 0 milliseconds
moment().startOf('second');  // same as moment().milliseconds(0);
moment().diff(Moment|String|Number|Date|Array);
moment().diff(Moment|String|Number|Date|Array, String);
moment().diff(Moment|String|Number|Date|Array, String, Boolean);
var a = moment([2008, 9]);
var b = moment([2007, 0]);
a.diff(b, 'years');       // 1
a.diff(b, 'years', true); // 1.75
moment().add(Number, String);
moment().add(Duration);
moment().add(Object);

var moment = require('moment');
var starttime = moment(moment.unix(parseInt(req.query.starttime)).toDate());
console.log("==============");
console.log(moment(moment.unix(parseInt(req.query.starttime)).toDate()));
var endtime = moment(moment.unix(parseInt(req.query.endtime)).toDate());
console.log(moment(moment.unix(parseInt(req.query.endtime)).toDate()));
console.log(endtime.diff(starttime, 'hour'));
console.log(endtime.diff(starttime, 'months'));
console.log(endtime.diff(starttime, 'months'));

if (endtime.diff(starttime, 'hour') <= 24) {
    console.log("flowrank1");
    flowrank1.find({
        ip: req.query.ip,
        time: {
            $gt: moment.unix(req.query.starttime).toDate(),
            $lte: moment.unix(req.query.endtime).toDate()
        }
    },
    {
        _id: 0,
        ip: 1,
        flow: 1,
        time: 1
    },
    function(err, doc) {
        if (err) {
            console.log("err!!!!!")
            console.log(err);
            return res.end(JSON.stringify(retcode.operateDbErr));
        }
        var result = retcode.res_ok;
        result.data = doc;
        console.log(doc)
        res.end(JSON.stringify(result));
    })
} else if (endtime.diff(starttime, 'months') == 0) {
    console.log("flowrank2!!!!");
    flowrank2.find({
        ip: req.query.ip,
        time: {
            $gt: moment.unix(req.query.starttime).toDate(),
            $lte: moment.unix(req.query.endtime).toDate()
        }
    },
    {
        _id: 0,
        ip: 1,
        flow: 1,
        time: 1
    },
    function(err, doc) {
        if (err) {
            console.log("err!!!!!")
            console.log(err);
            return res.end(JSON.stringify(retcode.operateDbErr));
        }
        var result = retcode.res_ok;
        result.data = doc;
        console.log(doc)
        res.end(JSON.stringify(result));
    })
} else if (endtime.diff(starttime, 'months') >= 1) {
    console.log("in flowrank3");
    flowrank3.find({
        ip: req.query.ip,
        time: {
            $gt: moment.unix(req.query.starttime).toDate(),
            $lte: moment.unix(req.query.endtime).toDate()
        }
    },
    {
        _id: 0,
        ip: 1,
        flow: 1,
        time: 1
    },
    function(err, doc) {
        if (err) {
            console.log("err!!!!!")
            console.log(err);
            return res.end(JSON.stringify(retcode.operateDbErr));
        }
        var result = retcode.res_ok;
        result.data = doc;
        console.log(doc)
        res.end(JSON.stringify(result));
    })
} else {
    return res.end(JSON.stringify(retcode.res_err));
}