模拟form表单上传图片

浏览器端： html：

 <form id="fileupload" class="fileupload form-upload" style="display:none;" enctype="multipart/form-data" method="post" action="javascript:;" role = "form">\
	<input type = "file" name = "files" class="file-input" /> \
	<input type="hidden" name="modulename" value=""/>\
	<input type="button" class="upload-btn J_Uploadimg"  value="上传截图"/>\
</form>\

JS：

var $fileUpload = $(".fileupload");

var formData = new FormData($fileUpload[0]);

	$.ajax({
		url: '/api/upload_img',
		type: 'POST',	
		data: formData,
		async: false,
		cache: false,
		contentType: false,
		processData: false,
		success: function(data){
			nanobar.go(100);
			//异步化
			if(data.success){
				$('#J_MsgCenter').html($.substitute('<span class="label label-success">{message}</span>',{message:data.message}));
			}
			else{
				$('#J_MsgCenter').html($.substitute('<span class="label label-danger">{message}</span>',{message:data.message}));
			}	
			node.removeClass('disabled');
			if(node.attr('data-reload')){
				window.location.reload();
			}
			console.log('imgUploader upload success, data:', data);
		},
		error: function(){
			$("#spanMessage").html("与服务器通信发生错误");
		}
	});

服务器端：

module.exports = function (req, res, next) {

new Promise(function(resolve, reject){

res.append('Access-Control-Allow-Origin', '*');

var form = new multiparty.Form();

form.parse(req, function(err, fields, files) {

  console.log('fields:');
  console.log(fields);

  console.log('files:');
  console.log(files);

  var modulename = fields.modulename[0];

  var modulePath = path.join(work_path, 'module', modulename);
  var imgPath = files.files[0].path;

  uploadImg(imgPath, modulePath, resolve, reject);

});

})