//文件上传
//获取当前时间（年月日时分秒）
function getnow() {
    var date = new Date();
    var seperator1 = "";
    var seperator2 = "";
    var month = date.getMonth() + 1;
    var strDate = date.getDate();
    if (month >= 1 && month <= 9) {
        month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
        strDate = "0" + strDate;
    }
    var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
            + "" + date.getHours() + seperator2 + date.getMinutes()
            + seperator2 + date.getSeconds()+date.getMilliseconds();
    return currentdate;
}

//服务开始
var express = require(‘express‘);
var app = express();
var fs = require("fs");
var http  = require(‘http‘);
var $ = require("jquery");
var xlsx = require("node-xlsx");// use be json


var json=null;


var bodyParser = require(‘body-parser‘);
var multer  = require(‘multer‘);

app.use(express.static(‘public‘));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(multer({ dest: ‘/tmp/‘}).array(‘image‘));

app.get(‘/index.html‘, function (req, res) {
   res.sendFile( __dirname + "/" + "index.html" );
});

app.post(‘/file_upload‘, function (req, res) {

   var  namelast=getnow()+ req.files[0].originalname;
   var des_file = __dirname + "/files/" + namelast;
   fs.readFile( req.files[0].path, function (err, data) {
       
       //300M文件限制
       if(314572800<data.length)
       {
            response = {
                   code:15,
                   msg:‘file length is max‘, 
                   data:"",
                   path:"",
                   name:req.files[0].originalname
            }; 
            res.end( JSON.stringify( response ) );
       }
       else{
            //写入文件
             fs.writeFile(des_file, data, function (err) {
             if( err ){
                  console.log( err );
             }else{
                  
                 json = xlsx.parse(des_file);
                 
                 response = {
                       code:0,
                       msg:‘File uploaded successfully‘, 
                       data:JSON.stringify(json),
                       path:namelast,
                       name:req.files[0].originalname
                 };
                 fs.writeFile("json.json", JSON.stringify(json),function (err) {
                     if (err) throw err ;
                 });
              }
              res.end( JSON.stringify( json ) );
            });
       }
    });
});
 

var server = app.listen(3000, function () {
  console.log("address:  http://localhost:3000");
});