asdf

book_with_bridge/ftp_server/ftp/conn.go

@@ -47,8 +47,8 @@ func Serve (c *Conn) {
 		case "QUIT": // close
 			c.respond(status221)
 			return
-		case "RETR": // get
+		// case "RETR": // get
-			c.retr(args)
+		// 	c.retr(args)
 		case "TYPE":
 			c.setDataType(args)
 		default:

book_with_bridge/ftp_server/ftp/dataconn.go

@@ -10,11 +10,11 @@ func (c *Conn) dataConnect() (net.Conn, error) {
 	return conn, nil
 }
 
- dataConn, err := c.dataConnect()
+	dataConn, err = c.dataConnect()
-  if err != nil {
+	if err != nil {
-    log.Print(err)
+		log.Print(err)
-    c.respond(status425)
+		c.respond(status425)
-    return
+		return
   }
   defer dataConn.Close()
 

book_with_bridge/interfaces/reverb_client/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.25.5

book_with_bridge/interfaces/reverb_client/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"io"
+	"log"
+	"net"
+	"os"
+)
+
+func mustCopy(dst io.Writer,src io.Reader) {
+	if _,err := io.Copy(dst,src); err != nil {
+		log.Fatalf("Error in mustCopy",err)
+	}
+
+}
+
+func main() {
+	conn,err := net.Dial("tcp",":9090")
+	if err != nil {
+		log.Fatalf("Error in Dial %s",err)
+	}
+	defer conn.Close()
+	
+	go mustCopy(os.Stdout,conn)
+	mustCopy(conn,os.Stdin)
+}

book_with_bridge/interfaces/reverb_server/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.25.5

book_with_bridge/interfaces/reverb_server/main.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net"
+	"strings"
+	"time"
+)
+
+func echo(c net.Conn, shout string, t time.Duration) {
+	fmt.Fprintln(c, "\t", strings.ToUpper(shout))
+	time.Sleep(t)
+	fmt.Fprintln(c, "\t", shout)
+	time.Sleep(t)
+	fmt.Fprintln(c, "\t", strings.ToLower(shout))
+}
+
+func handleConn(conn net.Conn) {
+	defer fmt.Println("CLosed Connection")
+	defer conn.Close()
+
+	fmt.Println("Accepted connection")
+	input := bufio.NewScanner(conn)
+	for input.Scan() {
+		go echo(conn, input.Text(), 1*time.Second)
+	}
+
+}
+
+func main() {
+	listener, err := net.Listen("tcp", ":9090")
+	if err != nil {
+		log.Fatalf("Error %v", err)
+	}
+
+	for {
+		conn, err := listener.Accept()
+		if err != nil {
+			log.Fatalf("Error in Accept %s", err)
+		}
+		go handleConn(conn)
+	}
+}