begin work on "test client"

cmd/client/main.go

@@ -0,0 +1,100 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/url"
+	"os"
+	"os/signal"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+func main() {
+	interrupt := make(chan os.Signal, 1)
+	signal.Notify(interrupt, os.Interrupt)
+
+	host := "127.0.0.1:5000"
+	langURL := fmt.Sprintf("ws://%s/lang", host)
+	cmdURL := fmt.Sprintf("ws://%s/cmd", host)
+	debugURL := fmt.Sprintf("ws://%s/debug", host)
+	execURL := fmt.Sprintf("ws://%s/", host)
+
+	execConn, err := connectWebSocket(execURL)
+	if err != nil {
+		log.Fatal("Failed to connect to lang websocket:", err)
+	}
+	defer execConn.Close()
+
+	langConn, err := connectWebSocket(langURL)
+	if err != nil {
+		log.Fatal("Failed to connect to lang websocket:", err)
+	}
+	defer langConn.Close()
+
+	cmdConn, err := connectWebSocket(cmdURL)
+	if err != nil {
+		log.Fatal("Failed to connect to cmd websocket:", err)
+	}
+	defer cmdConn.Close()
+
+	debugConn, err := connectWebSocket(debugURL)
+	if err != nil {
+		log.Fatal("Failed to connect to debug websocket:", err)
+	}
+	defer debugConn.Close()
+
+	done := make(chan struct{})
+	go readMessages(langConn, "lang", done)
+	go readMessages(cmdConn, "cmd", done)
+	go readMessages(debugConn, "debug", done)
+	// Read the contents of source.txt
+	sourceFile := "source.txt"
+	sourceData, err := ioutil.ReadFile(sourceFile)
+	if err != nil {
+		log.Fatal("Failed to read source file:", err)
+	}
+
+	// create execConn off of / endpoint
+
+	// Send the contents over the lang websocket
+	err = execConn.WriteMessage(websocket.TextMessage, sourceData)
+	if err != nil {
+		log.Fatal("Failed to send source data over lang websocket:", err)
+	}
+
+	select {
+	case <-interrupt:
+		fmt.Println("Interrupt signal received, closing connections...")
+		close(done)
+		time.Sleep(1 * time.Second)
+		return
+	}
+}
+
+func connectWebSocket(urlStr string) (*websocket.Conn, error) {
+	u, err := url.Parse(urlStr)
+	if err != nil {
+		return nil, err
+	}
+
+	conn, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return conn, nil
+}
+
+func readMessages(conn *websocket.Conn, name string, done chan struct{}) {
+	for {
+		_, message, err := conn.ReadMessage()
+		if err != nil {
+			log.Println("Error reading message from", name, "websocket:", err)
+			return
+		}
+		fmt.Printf("Received message from %s: %s\n", name, message)
+	}
+}