Automatically connects to esper.net and sends a message

GoIRC.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Prints the messages received directly to the console
+// If it is a server PING, reply the correct PONG
+func printMesages(connection net.Conn) {
+	reader := bufio.NewReader(connection)
+
+	for {
+		message,err := reader.ReadString('\n')
+		if err != nil {
+			fmt.Printf("Error while reading")
+			fmt.Println(err.Error())
+			return
+		}
+		fmt.Print(message)
+		fields := strings.Fields(message)
+		for index := range fields {
+			if fields[index] == "PING" {
+				fmt.Fprintf(connection,"PONG %s\n",fields[index+1])
+			}
+		}
+	}
+}
+
+func main() {
+	var serverAdress string
+	var serverPort int
+	if len(os.Args) > 2 {
+		serverAdress = os.Args[1]
+
+		var err error
+		serverPort, err = strconv.Atoi(os.Args[2])
+
+		if err != nil {
+			fmt.Println("Port cannot be parsed to int!")
+			fmt.Println(err.Error())
+			os.Exit(-1)
+		}
+	} else {
+		fmt.Println("Usage : GoIRC [Server address] [Server port]")
+		os.Exit(-1)
+	}
+
+	fmt.Printf("Trying to connect to %s:%d ...\n", serverAdress, serverPort)
+
+	connection, err := net.Dial("tcp",fmt.Sprintf("%s:%d",serverAdress,serverPort))
+
+	if err != nil {
+		fmt.Println("Error while trying to connect to the server!")
+		fmt.Println(err.Error())
+		os.Exit(-1)
+	}
+
+	// On exit, quit the server and close the connection
+	defer connection.Close()
+	defer fmt.Fprintf(connection,"quit\n")
+
+	fmt.Println("Connected !")
+
+	go printMesages(connection)
+
+	time.Sleep(1 * time.Second)
+
+	// ID ourselves to the server
+	_, err = fmt.Fprintf(connection,"nick goTrot\nuser goTrot 0 * :trotFunky\n")
+	if err != nil {
+		fmt.Println(err.Error())
+		os.Exit(-1)
+	}
+
+	// Wait for ident response to pass
+	time.Sleep(10 * time.Second)
+
+	// Now we can join a channel and start speaking
+	fmt.Fprintf(connection, "join #trot_go_test\n")
+
+	fmt.Fprintf(connection, "privmsg #trot_go_test :BONJOUR MÉCRÉANT\n")
+
+	time.Sleep(10 * time.Second)
+}