reformatting of reader

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "main.go",
+            "env": {
+                "PORT": "4269"
+            }
+        }
+    ]
+}

main.go

@@ -1,12 +1,14 @@
 package main
 
 import (
+	"errors"
 	"fmt"
-	"io"
 	"net"
 	"os"
 )
 
+var EOF = errors.New("EOF")
+
 func main() {
 	ln, err := net.Listen("tcp", ":"+os.Getenv("PORT"))
 	if err != nil {
@@ -28,7 +30,22 @@ func main() {
 func handle(conn net.Conn) {
 	defer conn.Close()
 
-	if _, err := io.Copy(conn, conn); err != nil {
-		fmt.Println("copy: ", err.Error())
+	buff := make([]byte, 32*1024)
+	for {
+		messageLength, err := conn.Read(buff)
+
+		if err != nil {
+			if err != EOF {
+				fmt.Println("Error reading data: ", err)
+			}
+			break
+		}
+
+		_, err = conn.Write(buff[0:messageLength])
+
+		if err != nil {
+			fmt.Println("Error writing data: ", err)
+			break
+		}
 	}
 }