Why is the golang webserver not working?

Question

go

Wrote a web server that should return a structure. But the server issues 404. As I understand it, helloHandler doesn't even run.

package main

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

func main(){
  handler:=http.NewServeMux()

  // C R U D
  handler.HandleFunc("/hello", helloHandler)

  s:= http.Server{
    Addr: ":8080",
    Handler: nil,
    ReadTimeout: 10 * time.Second,
    WriteTimeout: 10 * time.Second,
    IdleTimeout: 10 * time.Second,
    MaxHeaderBytes: 1 << 20,        //1*2^20 - 128kBytes
  }
  log.Fatal(s.ListenAndServe())
}

type Resp struct{
  Message string
  Error string
}



func helloHandler(w http.ResponseWriter, r *http.Request) {
  w.Header().Set("Content-Type", "application/json")
  fmt.Print("WORK")
  resp := Resp {
    Message: "hello",
  }

  respJson, _ := json.Marshal(resp)

  w.WriteHeader(http.StatusOK)

  w.Write(respJson)

}

Answer 1

Handler for the server was not specified.

s:= http.Server{
    Addr: ":8080",
    Handler: handler, //здесь
    ReadTimeout: 10 * time.Second,
    WriteTimeout: 10 * time.Second,
    IdleTimeout: 10 * time.Second,
    MaxHeaderBytes: 1 << 20,        //1*2^20 - 128kBytes
  }