from表单POST提交nodejs
var form = new formidable.IncomingForm();
form.parse(req, function(err, fields, files) {
 console.log({fields: fields, files: files});
    });
var form = new formidable.IncomingForm();
form.parse(req, function(err, fields, files) {
 console.log({fields: fields, files: files});
    });