http中的Goroutines [重复]

Question

This question already has an answer here:

• Go web server requests spawn its own goroutine? 1 answer

I have a question about goroutines in http.

In the code below is a simple web server.

If 5 people access the server, 2 people go in function handler1() and 3 people go in handler2(), golang will create 5 goroutines or do I need to put the reserved word go?

e.g. go http.HandleFunc("/h1", handler1)

package main

import( 
      "fmt"
      "log"
      "net/http"
 )

func handler1(w http.ResponseWriter, r *http.Request) {
      fmt.Println(w, "Hello 01!")
}

func handler2(w http.ResponseWriter, r *http.Request) {
      fmt.Println(w, "Hello 02")
}

func main() {
      http.HandleFunc("/h1", handler1)
      http.HandleFunc("/h2", handler2)
      log.Fatal(http.ListenAndServe(":8080", nil))
}

</div>

Answer 1

No matter how you start a net/http server, it ends up calling Serve which:

Serve accepts incoming connections on the Listener l, creating a new service goroutine for each. The service goroutines read requests and then call srv.Handler to reply to them.