golang发送xlsx文件到浏览器端

golang服务器端代码：

func httpHandleExportFunc(w http.ResponseWriter, req *http.Request) {
    requesturl := req.RequestURI
    uid := ""
    if index := strings.Index(requesturl, "?"); index > 0 {
        query := requesturl[index+1:]
        if index = strings.Index(query, "="); index > 0 {
            uid = query[index+1:]
        }
    }
    parr := make([]string, 0)
    sess_uid := make([]string, 1)
    sess_uid[0] = uid
    userlistarrmap := DBCallProcs("user_list", parr, sess_uid)

    var xlsxfile *xlsx.File
    var sheet *xlsx.Sheet
    var row *xlsx.Row
    var cell *xlsx.Cell

    xlsxfile = xlsx.NewFile()
    sheet = xlsxfile.AddSheet("sheet1")

    row = sheet.AddRow()
    cell = row.AddCell()
    cell.Value = "用户ID"
    cell = row.AddCell()
    cell.Value = "密码"
    cell = row.AddCell()
    cell.Value = "餐厅名称"
    cell = row.AddCell()
    cell.Value = "餐厅地址"
    cell = row.AddCell()
    cell.Value = "联系电话"
    cell = row.AddCell()
    cell.Value = "联系人"
    var fileds []string = []string{"uid", "pwd_hash", "title", "address", "telphone", "contact"}
    for _, v := range userlistarrmap {
        row = sheet.AddRow()
        for _, n := range fileds {
            cell = row.AddCell()
            cell.Value = v[n]
        }
    }

    xlsxfile.Save("exportusers.xlsx")

    file, err := os.Open("./exportusers.xlsx")
    defer file.Close()
    if err != nil {
        fmt.Println(err)
    }
    b, _ := ioutil.ReadAll(file)
    w.Header().Add("Content-Disposition", "attachment")
    //w.Header().Add("Content-Type", "application/vnd.ms-excel")
    w.Header().Add("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
    w.Write(b)

}

golang操作xlsx文件的包在：https://github.com/tealeg/xlsx

content-type=application/vnd.ms-excel 这个是发送xls文件的，下面的那个才是用来发送xlsx文件的．

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