msgpack代替json防止丢失类型
妙音
posted @ 2021年6月30日 15:12
in golang
, 1779 阅读
描述
开发了一个通信协议, 协议对数据类型比较敏感, 根据不同数据数据类型使用不同格式。golang的数据类型能够满足需求。
然而,将协议转为http方式时,如果传入json,会发现数据类型不符合预期
例如,本来是应该int结果是float64; 本来应该是[]byte,结果是string
环境
http服务器: gin
开发语言: golang
解决方法探寻
什么传输协议会带上数据类型?
* json类型丢失
默认情况下gin的BindJSON,可将传入的参数绑定到具体的结构体,产生类型转换。然后,我的结果需要是动态的,不知道参数的具体内容。
* 自定义参数格式,将类型带上。例如 marchinery
Arg struct{ Type string Value interface{} }
缺点:太麻烦
* 常用协议中选择
xml 可以用,不理想
yaml 不能解决问题
protobuf 不能解决问题
messagepack 有详细的数据类型,完美
msgpack替代json
gin示例
func SendXX(c *gin.Context){ rawData, _ := c.GetRawData() var param interface{} msgpack.Unmarshal(rawData, ¶m) result := struct{ Name string }{ Name: "xxx", } resultData, _ := msgpack.Marshal(result) c.Data(200, "application/x-msgpack", resultData) }
备注
* gin自带的msgpack版本是1.1.7不好用,不会自动进行类型转换。 最好改用 github.com/vmihailenco/msgpack/v5
* 替换gin中的部分接口就可以,不用全部改为msgpack
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