From 4bccb2512d0f47c7d24dd43fea8d3a9acd7c4111 Mon Sep 17 00:00:00 2001
From: Russ Magee <rmagee@gmail.com>
Date: Mon, 8 Jan 2018 20:24:10 -0800
Subject: [PATCH] Added vanilla client.go server.go for comparison

---
 demo/clientp.go | 20 ++++++++++++
 demo/serverp.go | 85 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 demo/clientp.go
 create mode 100644 demo/serverp.go

diff --git a/demo/clientp.go b/demo/clientp.go
new file mode 100644
index 0000000..ff8838e
--- /dev/null
+++ b/demo/clientp.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	
+	"net"
+)
+
+func main() {
+	conn, err := net.Dial("tcp", "localhost:2000")
+	if err != nil {
+		// handle error
+		fmt.Println("Err!")
+	}
+	fmt.Fprintf(conn, "\x01\x02\x03\x04")
+	//fmt.Fprintf(conn, "GET / HTTP/1.0\r\n\r\n")
+	//status, err := bufio.NewReader(conn).ReadString('\n')
+	//_, err = bufio.NewReader(conn).ReadString('\n')
+	// ...
+}
diff --git a/demo/serverp.go b/demo/serverp.go
new file mode 100644
index 0000000..5f13c51
--- /dev/null
+++ b/demo/serverp.go
@@ -0,0 +1,85 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"time"
+
+	"net"
+)
+
+func main() {
+	// Listen on TCP port 2000 on all available unicast and
+	// anycast IP addresses of the local system.
+	l, err := net.Listen("tcp", ":2000")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer l.Close()
+
+	fmt.Println("Serving on port 2000")
+	for {
+		// Wait for a connection.
+		conn, err := l.Accept()
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		fmt.Println("Accepted client")
+
+		// Handle the connection in a new goroutine.
+		// The loop then returns to accepting, so that
+		// multiple connections may be served concurrently.
+		go func(c net.Conn) (e error) {
+			ch := make(chan []byte)
+			chN := 0
+			eCh := make(chan error)
+
+			// Start a goroutine to read from our net connection
+			go func(ch chan []byte, eCh chan error) {
+				for {
+					// try to read the data
+					data := make([]byte, 64)
+					chN, err = c.Read(data)
+					if err != nil {
+						// send an error if it's encountered
+						eCh <- err
+						return
+					}
+					// send data if we read some.
+					ch <- data[0:chN]
+				}
+			}(ch, eCh)
+
+			ticker := time.Tick(time.Second)
+		Term:
+			// continuously read from the connection
+			for {
+				select {
+				// This case means we recieved data on the connection
+				case data := <-ch:
+					// Do something with the data
+					fmt.Printf("Client sent %+v\n", data[0:chN])
+					//fmt.Printf("Client sent %s\n", string(data))
+				// This case means we got an error and the goroutine has finished
+				case err := <-eCh:
+					// handle our error then exit for loop
+					if err.Error() == "EOF" {
+						fmt.Printf("[Client disconnected]\n")
+					} else {
+						fmt.Printf("Error reading client data! (%+v)\n", err)
+					}
+					break Term
+				// This will timeout on the read.
+				case <-ticker:
+					// do nothing? this is just so we can time out if we need to.
+					// you probably don't even need to have this here unless you want
+					// do something specifically on the timeout.
+				}
+			}
+			// Shut down the connection.
+			c.Close()
+			return
+		}(conn)
+	}
+}