flask+layui实现前后端文件传输

flask+layui实现前后端文件传输

• 此处不再赘述flask跟layui的基本配置了
• 前端：可以查看文档https://www.layui.com/demo/upload.html
  • 效果图
  • 代码前端（注：大多数是layui中的部分，需要关注的是前后端文件传输部分）

<button type="button" class="layui-btn layui-btn-normal" id="testList">选择多文件</button>

<div class="layui-upload-list">
  <table class="layui-table">
    <thead>
      <tr>
        <th>文件名</th>
        <th>大小</th>
        <th>上传进度</th>
        <th>操作</th>
      </tr>
    </thead>
    <tbody id="demoList"></tbody>
  </table>
</div>
<button type="button" class="layui-btn" id="testListAction">开始上传</button>

<script>
layui.use(['upload', 'element', 'layer'], function () {
	var $ = layui.jquery,
      form = layui.form,
      
//演示多文件列表
  var uploadListIns = upload.render({
    elem: '#testList'
    ,elemList: $('#demoList') //列表元素对象
    ,url: '/test'
    ,accept: 'file'
    ,multiple: true
    ,number: 3
    ,auto: false
    ,bindAction: '#testListAction'
    ,choose: function(obj){   
      var that = this;
      var files = this.files = obj.pushFile(); //将每次选择的文件追加到文件队列
      //读取本地文件
      obj.preview(function(index, file, result){
        var tr = $(['+ index +'">'
          ,''+ file.name +''
          ,''+ (file.size/1014).toFixed(1) +'kb'
          ,'
+ index +'">
'
          ,''
            ,'重传'
            ,'删除'
          ,''
        ,''].join(''));
        
        //单个重传
        tr.find('.demo-reload').on('click', function(){
          obj.upload(index, file);
        });
        
        //删除
        tr.find('.demo-delete').on('click', function(){
          delete files[index]; //删除对应的文件
          tr.remove();
          uploadListIns.config.elem.next()[0].value = ''; //清空 input file 值，以免删除后出现同名文件不可选
        });
        
        that.elemList.append(tr);
        element.render('progress'); //渲染新加的进度条组件
      });
    }
    ,done: function(res, index, upload){ //成功的回调
      var that = this;
      //if(res.code == 0){ //上传成功
        var tr = that.elemList.find('tr#upload-'+ index)
        ,tds = tr.children();
        tds.eq(3).html(''); //清空操作
        delete this.files[index]; //删除文件队列已经上传成功的文件
        return;
      //}
      this.error(index, upload);
    }
    ,allDone: function(obj){ //多文件上传完毕后的状态回调
      console.log(obj)
    }
    ,error: function(index, upload){ //错误回调
      var that = this;
      var tr = that.elemList.find('tr#upload-'+ index)
      ,tds = tr.children();
      tds.eq(3).find('.demo-reload').removeClass('layui-hide'); //显示重传
    }
    ,progress: function(n, elem, e, index){ //注意：index 参数为 layui 2.6.6 新增
      element.progress('progress-demo-'+ index, n + '%'); //执行进度条。n 即为返回的进度百分比
    }
  });
});
</script>

• • flask代码

from flask import Flask
app = Flask(import_name=__name__)

@app.route('test', methods=['GET', 'POST'])
def test():
	f = request.files.get("file")	#获取前端传来的文件
	f.save('./{}'.format(f.filename))	# 将文件保存下来
	return {'flag': True}