导出excel，后端返回blob文件

	async down() {
			try {
				const params = {
					days: this.queryForm.date.join(','),
					appid: this.queryForm.appid.join(','),
					type: this.queryForm.type.join(','),
					adchannelid: this.queryForm.adchannelid.join(','),
					sdkVersion: this.queryForm.sdkVersion,
					versionName: this.queryForm.versionName,
					subadsenseid: this.queryForm.subadsenseid,
					page: this.pageable.pageNum,
					page_size: this.pageable.pageSize,
				}
				this.downLoading = true
				const res = await api.handleExportFunnel(params)
				this.downLoading = false
				const headers = res.headers['Content-Disposition'] || res.headers['content-disposition']
				const filename = headers.split('utf-8\'\'')[1]
				console.log(res.headers, '65465465465465')
				if (navigator.msSaveBlob) {
					// 兼容ie10+
					window.navigator.msSaveOrOpenBlob(res.data, filename)
					return false
				}
				// 其他主流浏览器
				let eleLink = document.createElement('a')
				eleLink.download = decodeURI(filename)
				eleLink.style.display = 'none'
				let blob = new window.Blob([res.data])
				eleLink.href = URL.createObjectURL(blob)
				document.body.appendChild(eleLink)
				eleLink.click()
				document.body.removeChild(eleLink)
			} finally {
				this.downLoading = false
			}
		},