问题描述
我是Go的新手,我正在尝试构建一个简单的HTTP服务器.但是我在JSON响应中遇到了一些问题.我编写了以下代码,然后尝试邮递员发送一些JSON数据.但是,我的邮递员总是收到空响应,而content-type
是text/plain; charset=utf-8
.然后,我在 http://www.alexedwards.net/blog/中检查了一个示例golang-response-snippets#json .我复制并粘贴了示例,并且效果很好.但是我看不到我和样本之间的任何区别.有人可以帮忙吗?
I am new to Go, and I am trying to practice with building a simple HTTP server. However I met some problems with JSON responses. I wrote following code, then try postman to send some JSON data. However, my postman always gets an empty response and the content-type
is text/plain; charset=utf-8
. Then I checked a sample in http://www.alexedwards.net/blog/golang-response-snippets#json. I copied and pasted the sample, and it was working well. But I cannot see any difference between mine and the sample. Can someone give some help?
package main
import (
"encoding/json"
"net/http"
)
type ResponseCommands struct {
key string
value bool
}
func main() {
http.HandleFunc("/", handler)
http.ListenAndServe(":5432", nil)
}
func handler(rw http.ResponseWriter, req *http.Request) {
responseBody := ResponseCommands{"BackOff", false}
data, err := json.Marshal(responseBody)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
rw.WriteHeader(200)
rw.Header().Set("Content-Type", "application/json")
rw.Write(data)
}
推荐答案
主要区别在于结构中的变量是公共的(导出的)
The main difference is that the variable in the struct are public (exported)
type Profile struct {
Name string
Hobbies []string
}
在您的情况下,它们不是(小写).
In your case, they are not (lowercase).
type ResponseCommands struct {
key string
value bool
}
请参阅"使用JSON元帅在Go中使用小写JSON密钥名称".
这篇关于使用JSON进行HTTP响应的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!