golang实现一个简单的HTTP server

目标:用golang实现一个简单的HTTP Server，支持指定监听端口，将收到的POST的payload中的内容打印出来

golang环境准备

直接贴

admin@hpc-1:~/go$ cat http_rpc_server.go
package main

import (
"fmt"
"log"
"flag"
"net/http"
"encoding/json"
)

// 定义一个用于接收请求的结构体
type MapPrinter struct{}

// 定义一个用于接收请求的方法
func (m *MapPrinter) PrintMap(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
return
}
复制代码
```
  var payload map[string]interface{}
  err := json.NewDecoder(r.Body).Decode(&payload)
  if err != nil {
      http.Error(w, "Invalid payload", http.StatusBadRequest)
      return
  }

  fmt.Println("Received payload:")
  for key, value := range payload {
      fmt.Printf("%s: %v\n", key, value)
  }

  w.WriteHeader(http.StatusOK)
  w.Write([]byte("Map printed successfully\n"))
```
}

func main() {
//获取监听端口，默认8080
port := flag.String("p", "8080", "指定监听端口")
// 解析命令行参数
flag.Parse()
复制代码
```
  //注册abc-api路由
  http.HandleFunc("/abc-api", new(MapPrinter).PrintMap)

  fmt.Println("Server is listening on port %s...", *port)
  log.Fatal(http.ListenAndServe(":" + *port, nil))
```
}
admin@hpc-1:~/go$
编译

admin@hpc-1:~/go $go build -o http_rpc_server http_rpc_server.go admin@hpc-1:~/go$
终端1上，运行server监听8090端口

admin@hpc-1:~/go$ ./http_rpc_server -p 8090
Server is listening on port 8090...