无法读取json正文

问题描述

golang非常陌生，我正在尝试阅读golang中的json请求正文，但它只是转换为空字符串.

Quite new to golang, I am trying to read the post json request body in golang, but it just converts to empty string.

下面是我尝试通过请求json主体转换为

Below is the struct which I am trying to convert by request json body to

type SdpPost struct {
    id string
    sdp string
}

func (s *SdpPost) Id() string {
    return s.id
}

func (s *SdpPost) SetSdp(sdp string) {
    s.sdp = sdp
}

func (s *SdpPost) Sdp() string {
    return s.sdp
}

当我尝试打印以下代码段时，我确实看到了我通过邮递员传递的json请求正文

When I try to print the below snippet, I do see my json request body which I am passing through postman

Dumping the json POST /v1/sdp HTTP/1.1
Host: localhost:8080
Accept: */*
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Content-Length: 62
Content-Type: application/json
Postman-Token: 5f0f9961-f058-446a-86e8-7f047c1dc5cc
User-Agent: PostmanRuntime/7.24.1

{
        "sdp":"This is the test sdp",
        "id":"This is the test id"
}

但是下面的代码什么也不打印，它只是ID和sdp的空字符串

But the below code prints nothing, it is just empty string for Id and sdp

    r.Header.Set("Content-Type", "application/json")
    decoder := json.NewDecoder(r.Body)
    sdp := handler.SdpPost{}
    decoder.Decode(&sdp)
    w.WriteHeader(http.StatusOK)
    fmt.Print(sdp.Id())
    fmt.Println(sdp.Sdp())

我在某处缺少什么吗?我从字面上搜索了所有地方，这几乎被使用了.

Is there anything which I am missing somewhere? I literally searched every where and this is pretty much being used.

推荐答案

问题是未导出 SdpPost 字段，因此json解码器看不到它们，您可以这样解决:>

Problem is that SdpPost fields are unexported, so json decoder doesn't see them, you can fix that like that:

type SdpPost struct {
    Id string
    Sdp string
}

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