day10协程 实例 echo

src/study/day10Goroutines/exampleEcho.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"strings"
+	"time"
+)
+
+func echo(c net.Conn, shout string, delay time.Duration) {
+	fmt.Fprintln(c, "\t", strings.ToUpper(shout))
+	time.Sleep(delay)
+	fmt.Fprintln(c, "\t", shout)
+	time.Sleep(delay)
+	fmt.Fprintln(c, "\t", strings.ToLower(shout))
+}
+
+func handleConn1(c net.Conn) {
+	input := bufio.NewScanner(c)
+	for input.Scan() {
+		echo(c, input.Text(), 1*time.Second)
+	}
+	// NOTE: ignoring potential errors from input.Err()
+	c.Close()
+}
+func main() {
+	conn, err := net.Dial("tcp", "localhost:8000")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer conn.Close()
+	go mustCopy(os.Stdout, conn)
+	mustCopy(conn, os.Stdin)
+}