jquery获取上传进度和取消上传操作

Posted 2020-12-28 shuaihan

var xhrOnProgress=function(fun) {
              xhrOnProgress.onprogress = fun; //绑定监听
              //使用闭包实现监听绑
              return function() {
                //通过$.ajaxSettings.xhr();获得XMLHttpRequest对象
                var xhr = $.ajaxSettings.xhr();
                //判断监听函数是否为函数
                if (typeof xhrOnProgress.onprogress !== ‘function‘)
                  return xhr;
                //如果有监听函数并且xhr对象支持绑定时就把监听函数绑定上去
                if (xhrOnProgress.onprogress && xhr.upload) {
                  xhr.upload.onprogress = xhrOnProgress.onprogress;
                }
                return xhr;
              }
        }
        //文件上传 快速
        function newFileUpload(_this){
            var fd = new FormData();
            fd.append("paragram", 12345); //上传的参数名 参数值 k-v键值对
            fd.append("upfile", $("#upfile").get(0).files[0]);//上传的文件file
            ajaxRe =$.ajax({
                url: "${ctx}/platform/system/sysFile/fileUpload.ht",
                type: "POST",
                processData: false,
                contentType: false,
                data: fd,
                success: function(data) {
                    $("#loading_upload").hide(20);  
                    var fileId=JSON.parse(data).fileId;
                    var fileName=JSON.parse(data).fileName;
                    $("#fileList_upload").html($("#fileList_upload").html()+‘<div style="font-size:15px;height:28px;line-height:28px"><span fileid="‘+fileId+‘" name="attach" file="‘+fileId+‘,‘+fileName+‘" res="oa" filename="‘+fileName+‘">‘+fileName+‘</span>&nbsp;&nbsp;<img onclick="AttachMent.download(this);" style="width:15px;height:15px" src="/oa/styles/common/img/enclosure/download.png">&nbsp;&nbsp;<img onclick="AttachMent.view(this);" style="width:15px;height:15px" src="/oa/styles/common/img/enclosure/preview.png">&nbsp;&nbsp;<img onclick="mailDelFile(‘+fileId+‘,this);" style="width:15px;height:15px" src="/oa/styles/common/img/enclosure/delete.png"></div>‘)
                    var obj={};
                    obj.id=fileId
                    obj.name=fileName
                    uploadArr.push(obj);
                    $("#filelist").html(JSON.stringify(uploadArr));
                    $("#upfile").val("")
                },
                xhr:xhrOnProgress(function(e){
                    var percent=e.loaded / e.total * 100;//计算百分比
                    $("#progess").html(percent.toFixed(2));
                }),
                beforeSend: function(){  
                     $("#loading_upload").show(20);  
                },
            })
            
        }
        function canceled_upload(){
            ajaxRe.abort()
            $("#upfile").val("")
            $("#loading_upload").hide(20); 
        }