vue使用axios获取不到响应头Content-Disposition的问题及解决

response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");
			response.setHeader("Content-Disposition", "attachment; filename=" + downloadName);

response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");

response.setHeader("Content-Disposition", "attachment; filename=" + downloadName);

download(form) {
      const loading = this.$loading({
        lock: true,
        text: 'Loading',
        spinner: 'el-icon-loading',
        background: 'rgba(0, 0, 0, 0.7)'
      })
      downloadFile({ id: form.reportId }).then(response => {
        var fileName = ''
          debugger;
        const contentDisposition = response.headers['content-disposition']
        if (contentDisposition) {
    
          fileName = window.decodeURI(response.headers['content-disposition'].split('=')[1], 'UTF-8')
        }
        const blob = new Blob([response.data], {
          type: `application/vnd.openxmlformats-officedocument.spreadsheetml.sheet` // word文档为msword,pdf文档为pdf
        })
        const objectUrl = URL.createObjectURL(blob)
        const link = document.createElement('a')
        link.href = objectUrl
        link.setAttribute('download', fileName)
        document.body.appendChild(link)
        link.click()
        // 释放内存
        window.URL.revokeObjectURL(link.href)
        loading.close()
      }).catch(response => {
        loading.close()
      })
    }

if (res.headers['content-disposition']) {
        res.data.contentDisposition =  res.headers['content-disposition']
    }