Add WebSocket transport and working CLI example + unit tests

example/cli/main.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	sdk "ownwire.net/ownwire-sdk"
+)
+
+func main() {
+	url := flag.String("url", "", "websocket url, e.g. ws://localhost:8080/ownwire")
+	resume_session_id := flag.String("resume", "", "resume session id (optional)")
+	flag.Parse()
+
+	if *url == "" {
+		fmt.Fprintln(os.Stderr, "missing -url")
+		os.Exit(2)
+	}
+
+	client := sdk.NewClient(sdk.ClientOptions{
+		Url: *url,
+	})
+
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	if err := client.Connect(ctx, *resume_session_id); err != nil {
+		fmt.Fprintf(os.Stderr, "connect failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Println("connected")
+
+	sig_ch := make(chan os.Signal, 1)
+	signal.Notify(sig_ch, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		for ev := range client.Events() {
+			switch ev.Kind {
+			case sdk.EventOpened:
+				fmt.Println("[opened]")
+			case sdk.EventClosed:
+				fmt.Println("[closed]")
+				return
+			case sdk.EventError:
+				fmt.Fprintf(os.Stderr, "[error] %v\n", ev.Err)
+			case sdk.EventMessage:
+				if ev.Message.Metadata != "" {
+					fmt.Printf("[msg #%d] %s | %s\n", ev.Message.SeqNum, ev.Message.Metadata, ev.Message.Content)
+				} else {
+					fmt.Printf("[msg #%d] %s\n", ev.Message.SeqNum, ev.Message.Content)
+				}
+			}
+		}
+	}()
+
+	go func() {
+		<-sig_ch
+		client.Close()
+		os.Exit(0)
+	}()
+
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		line := scanner.Text()
+		send_ctx, send_cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		err := client.Send(send_ctx, line, "")
+		send_cancel()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "send failed: %v\n", err)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		fmt.Fprintf(os.Stderr, "stdin error: %v\n", err)
+	}
+
+	client.Close()
+}