Node使用multiparty包上传文件

http方式

var multiparty = require('multiparty');
var http = require('http');
var util = require('util');
var fs = require("fs");

http.createServer(function(req, res) {
  if (req.url === '/upload' && req.method === 'POST') {
    // 解析一个文件上传
    var form = new multiparty.Form();
    //设置编辑
    form.encoding = 'utf-8';
    //设置文件存储路径
    form.uploadDir = "uploads/images/";
    //设置单文件大小限制
    form.maxFilesSize = 2 * 1024 * 1024;
    //form.maxFields = 1000;  设置所以文件的大小总和

    form.parse(req, function(err, fields, files) {
      var fileOne = files.upload[0]
      /*console.log(files);
      console.log(fileOne.originalFilename);
      console.log(fileOne.path);*/

      //同步重命名文件名
      //fs.renameSync(fileOne.path,form.uploadDir + fileOne.originalFilename);

      res.writeHead(200, {'content-type': 'text/plain'});
      res.write('received upload:\n\n');
      res.end(util.inspect({fields: fields, files: files}));
    });

    return;
  }

  // show a file upload form
  res.writeHead(200, {'content-type': 'text/html'});
  res.end(
    '<form action="/upload" enctype="multipart/form-data" method="post">'+
    '<input type="text" name="title"><br>'+
    '<input type="file" name="upload" multiple="multiple"><br>'+
    '<input type="submit" value="Upload">'+
    '</form>'
  );
}).listen(8080);

express方式

var multiparty = require('multiparty');
var http = require('http');
var util = require('util');
var fs = require("fs");
var express = require('express')
var path = require('path')

var app = express()

app.use('/qushan/', express.static(path.join(__dirname, 'uploads')))

var server = app.listen(3002, function(){
        console.log('server is listening...')
})

app.get('/qushan',function(req,res){
        res.send(
                '<form id="myForm" action="/qushan/upload" enctype="multipart/form-data" method="post">'+
                '<input type="text" name="title"><br>'+
                '<input type="file" name="upload" multiple="multiple" onchange="ajaxUpload()"><br>'+
                '<div id="uploadImg"><img src=""></div>'+
                '<a onclick="ajaxUpload()">ajax</a>'+
                '<input type="submit" value="Upload">'+
                '</form>'+
                '<script src="/qushan/images/jquery.min.js"></script>'+
                '<script>'+
                'function ajaxUpload(){'+

                '$.ajax({'+
                '       url: "http://www.likefun.cn/qushan/upload",'+
                '       type: "POST",'+
                '       data: new FormData($("#myForm")[0]),'+
                '       processData: false,'+
                '       contentType: false,'+
                '       success:function(responseStr){'+
                '               console.log(responseStr.newPath);'+
                '               $("#uploadImg img").attr("src",responseStr.newPath)'+
                '       }'+
                '})'+

                '}'+
                '</script>'
        )
})

app.post('/qushan/upload',function(req,res){
        var form = new multiparty.Form();
        form.encoding = 'utf-8';
        form.uploadDir = "uploads/images/";
        form.maxFilesSize = 2 * 1024 * 1024;

        form.parse(req, function(err, fields, files) {
                var fileOne = files.upload[0]
                console.log(fileOne)

                var imgUrl = '/qushan/' + fileOne.path.substring(8)
                res.json({"newPath":imgUrl})
        });
        return
})

formidable用法参考https://segmentfault.com/a/1190000005706031