如何获取从Ajax发送的JSON数据并解析为变量

I use jquery to send ajax json data for golang web restful service. And want to parse the json data in my backend using golang. Here is simple javascript code:

    $.ajax({
        url: "http://localhost:8080/persons",
        type: "POST",
        dataType: "json",
        data: {
            "data": '{"firstName": "Hello","lastName": "World"}' 
        },
        success:function (res) {
            console.log(res)
        },
        error: function (err){
            console.log(err)
        }
    })

Then use GetRawData() to get the gin.Context information, and a json decoder to parse the json content,

data, _ := c.GetRawData()
jsonStream := string(data)
dec := json.NewDecoder(strings.NewReader(jsonStream))

t, err := dec.Token()
if err != nil {
    log.Fatal(err)
}

for dec.More() {
    var p Person
    err := dec.Decode(&p)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("Hello %s
", p.firstName)
}

Done!

I'm not very familiar with Gin, but to accept application/json data, use gin.Context.BindJSON to bind the values in the request.

router.POST("/persons", func(c *gin.Context) {
  var jsonData Member
  if c.BindJSON(&jsonData) == nil {
    fmt.Println(jsonData.first_name + " " + jsonData.last_name)
  } else {
    // handle error

  }
}

Updating with Peter's suggestion for exporting the fields:

type Person struct {
    FirstName  string `json:"first_name"`
    LastName   string    `json:"last_name"`
}