记录下踩map的坑

这两天新调个接口的时候，一直提示签名错误，但所需的时间，工号，token都是对的，完全没有头绪，卡了两天后，终于找到原因了

原因是我的校验信息，是要将时间，工号，token封装在一起成字符串，然后用md5加密后传过去，之前封装时一直用的map，而map是无序的，转换成字符串时顺序不定，而后再用md5加密出来的字符串，跟所需字符串就不一样了

详看代码：

package main

import (
    "crypto/md5"
    "encoding/hex"
    "encoding/json"
    "fmt"
    "time"
)

// 签名信息
type signa struct {
    ThirdTime   int    `json:"thirdTime"`
    ThirdCaller string `json:"thirdCaller"`
    ThirdToken  string `json:"thirdToken"`
}

func main() {
    //校验信息
    m := map[string]interface{}{
        "thirdTime":   int(time.Now().Unix() * 1000),
        "thirdCaller": "W9010315",
        "thirdToken":  "55sfew4sfsf5rerx8sfwxs5",
    }
    signJson, _ := json.Marshal(m)
    fmt.Println(string(signJson))
    // 计算MD5值
    md55 := md5.Sum(signJson)
    thirdSign := hex.EncodeToString(md55[:])
    fmt.Println(thirdSign)

    fmt.Println("########################")

    signs := signa{
        ThirdTime:   int(time.Now().Unix() * 1000),
        ThirdCaller: "W9010315",
        ThirdToken:  "55sfew4sfsf5rerx8sfwxs5",
    }
    //用MD5加密签名信息
    signJsons, _ := json.Marshal(signs)
    fmt.Println(string(signJsons))
    // 计算MD5值
    md555 := md5.Sum(signJsons)
    thirdSigns := hex.EncodeToString(md555[:])
    fmt.Println(thirdSigns)
}

输出结果如下，校验信息所需的字符串是0322那个，跟我用map加密出来的字符串完全不一样

{"thirdCaller":"W9010315","thirdTime":1701336910000,"thirdToken":"55sfew4sfsf5rerx8sfwxs5"}
92ef16ab18a81d0333dee9f01e456a05
########################
{"thirdTime":1701336910000,"thirdCaller":"W9010315","thirdToken":"55sfew4sfsf5rerx8sfwxs5"}
032225f312a4b6200df96bd8d2b41ee4