add example with tcp goroutine pool and read only channel

read-only-chan.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net"
+)
+
+func produce(l *net.TCPListener, c chan<- net.Conn) {
+	for {
+		conn, _ := l.Accept()
+		c <- conn
+		defer conn.Close()
+	}
+}
+
+func consume(c <-chan net.Conn) {
+	fmt.Println("create goroutine consumer")
+	for conn := range c {
+		log.Println("someone connected")
+		var res = make([]byte, 10)
+		nb, err := conn.Read(res)
+		if err != nil {
+			log.Fatalln(err)
+		}
+		fmt.Printf("receive %d, contain %s\n", nb, string(res))
+
+		conn.Write([]byte("HTTP/1.1 200 OK\nContent-Type: text/html; encoding=utf8\nContent-Length: 15\nConnection: close\n\n<h1>HELLO</h1>\n"))
+		//<-time.After(10 * time.Second)
+		fmt.Println("Process ended")
+	}
+}
+
+func main() {
+	c := make(chan net.Conn, 10)
+	for i := 0; i < 10; i++ {
+		go consume(c)
+	}
+
+	addr := net.TCPAddr{
+		IP:   net.ParseIP("127.0.0.1"),
+		Port: 3000,
+	}
+	l, err := net.ListenTCP("tcp", &addr)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	produce(l, c)
+}