examples: More examples

examples/1proc/main.go

@@ -0,0 +1,86 @@
+package main
+
+import "io"
+import "log"
+import "time"
+import "errors"
+import "context"
+import "git.tebibyte.media/sashakoshka/hopp"
+
+var network = "tcp"
+var addr    = "localhost:7959"
+
+func main() {
+	go func() {
+		defer log.Println("SERVER closing")
+		
+		listener, err := hopp.Listen(network, addr, nil)
+		if err != nil { log.Println("SERVER", err); return }
+		log.Println("SERVER listening")
+		conn, err := listener.Accept()
+		if err != nil { log.Println("SERVER", err); return }
+		defer conn.Close()
+		
+		trans, err := conn.AcceptTrans()
+		if err != nil { log.Println("SERVER", err); return }
+		defer trans.Close()
+
+		for {
+			method, data, err := trans.Receive()
+			if err != nil { log.Println("SERVER", err); return }
+			log.Println("SERVER got", method, data)
+			log.Println("SERVER send", method, data)
+			err = trans.Send(1, data[:])
+			if err != nil { log.Println("SERVER", err); return }
+		}
+	}()
+
+	time.Sleep(time.Second * 2)
+	
+	func() {
+		log.Println("CLIENT dialing")
+		conn, err := hopp.Dial(context.Background(), network, addr, nil)
+		if err != nil { log.Fatalln("CLIENT", err) }
+		log.Println("CLIENT dialed")
+		
+		trans, err := conn.OpenTrans()
+		if err != nil {
+			log.Println("CLIENT", err)
+			return
+		}
+
+		go func() {
+			for {
+				method, data, err := trans.Receive()
+				if err != nil {
+					if !errors.Is(err, io.EOF) {
+						log.Printf("CLIENT failed to receive message: %v", err)
+					}
+					return
+				}
+				log.Println("CLIENT got", method, data)
+			}
+		}()
+		
+		data := [1]byte { }
+		for {
+			log.Println("CLIENT send", 1, data)
+			err := trans.Send(1, data[:])
+			if err != nil {
+				log.Println("CLIENT", err)
+				return
+			}
+			data[0] ++
+			time.Sleep(time.Second)
+		}
+		
+		log.Println("CLIENT waiting for connection close...")
+		trans, err = conn.AcceptTrans()
+		if !errors.Is(err, io.EOF) {
+			log.Println("CLIENT wrong error:", err)
+			log.Fatalln("CLIENT trans:", trans)
+		}
+		log.Println("CLIENT DONE")
+		conn.Close()
+	}()
+}

examples/min/client/main.go

@@ -0,0 +1,84 @@
+package main
+
+import "io"
+import "os"
+import "log"
+import "fmt"
+import "time"
+import "context"
+import "git.tebibyte.media/sashakoshka/hopp"
+// import "git.tebibyte.media/sashakoshka/hopp/examples/ping"
+
+func main() {
+	name := os.Args[0]
+	if len(os.Args) != 2 {
+		fmt.Fprintf(os.Stderr, "Usage: %s HOST:PORT\n", name)
+		os.Exit(2)
+	}
+	address := os.Args[1]
+	
+	conn, err := dial(address)
+	handleErr(1, err)
+	trans, err := conn.OpenTrans()
+	handleErr(1, err)
+
+	go func() {
+		defer fmt.Fprintf(os.Stdout, "(i) disconnected\n")
+		for {
+			// message, _, err := ping.Receive(trans)
+			// if err != nil {
+			// 	if !errors.Is(err, io.EOF) {
+			// 		handleErr(1, err)
+			// 	}
+			// 	break
+			// }
+			// switch message := message.(type) {
+			// case *ping.MessagePong:
+			// 	log.Printf("--> pong (%d) from %v", message, address)
+			// }
+			method, reader, err := trans.ReceiveReader()
+			if err != nil {
+				log.Printf("CLIENT recv: %v", err)
+				return
+			}
+			data, err := io.ReadAll(reader)
+			if err != nil {
+				log.Printf("CLIENT recv: %v", err)
+				return
+			}
+			log.Println("CLIENT got", method, data)
+		}
+	}()
+	
+	// message := ping.MessagePing(0)
+	// for {
+	// 	log.Printf("<-- ping (%d)", message)
+	// 	_, err := ping.Send(trans, &message)
+	// 	handleErr(1, err)
+	// 	message ++
+	// 	time.Sleep(time.Second)
+	// }
+	data := [1]byte { }
+	for {
+		log.Println("CLIENT send", 1, data)
+		err := trans.Send(1, data[:])
+		handleErr(1, err)
+		data[0] ++
+		time.Sleep(time.Second)
+	}
+}
+
+func dial(address string) (hopp.Conn, error) {
+	ctx, done := context.WithTimeout(context.Background(), 16 * time.Second)
+	defer done()
+	conn, err := hopp.Dial(ctx, "tcp", address, nil)
+	if err != nil { return nil, err }
+	return conn, nil
+}
+
+func handleErr(code int, err error) {
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%s: %v\n", os.Args[0], err)
+		os.Exit(code)
+	}
+}

examples/min/server/main.go

@@ -0,0 +1,97 @@
+package main
+
+import "io"
+import "os"
+import "fmt"
+import "log"
+import "errors"
+import "git.tebibyte.media/sashakoshka/hopp"
+// import "git.tebibyte.media/sashakoshka/hopp/examples/ping"
+
+var network = "tcp"
+var addr    = "localhost:7959"
+
+func main() {
+	name := os.Args[0]
+	if len(os.Args) != 2 {
+		fmt.Fprintf(os.Stderr, "Usage: %s HOST:PORT\n", name)
+		os.Exit(2)
+	}
+	address  := os.Args[1]
+	err := listen(address)
+	handleErr(1, err)
+}
+
+func listen(addr string) error {
+	defer log.Println("(i) closing")
+	
+	listener, err := hopp.Listen(network, addr, nil)
+	if err != nil { return err }
+	log.Printf("(i) hosting on %s", addr)
+	for {
+		conn, err := listener.Accept()
+		if err != nil { return err }
+		go run(conn)
+	}
+}
+
+func run(conn hopp.Conn) {
+	log.Printf("-=E %v connected", conn.RemoteAddr())
+	defer log.Printf("X=- %v disconnected", conn.RemoteAddr())
+	defer conn.Close()
+	
+	for {
+		trans, err := conn.AcceptTrans()
+		if err != nil {
+			if !errors.Is(err, io.EOF) {
+				log.Printf("XXX %v failed: %v", conn.RemoteAddr(), err)
+			}
+			return
+		}
+		go runTrans(conn, trans)
+	}
+}
+
+func runTrans(conn hopp.Conn, trans hopp.Trans) {
+	defer trans.Close()
+
+	for {
+		// message, _, err := ping.Receive(trans)
+		// if err != nil {
+		// 	if !errors.Is(err, io.EOF) {
+		// 		log.Printf("XXX failed to receive message: %v", err)
+		// 	}
+		// 	return
+		// }
+		// switch message := message.(type) {
+		// case *ping.MessagePing:
+		// 	log.Printf("--> ping (%d) from %v", message, conn.RemoteAddr())
+		// 	response := ping.MessagePong(*message)
+		// 	_, err := ping.Send(trans, &response)
+		// 	if err != nil {
+		// 		log.Printf("XXX failed to send message: %v", err)
+		// 		return
+		// 	}
+		// }
+		method, reader, err := trans.ReceiveReader()
+		if err != nil { log.Println("SERVER", err); return }
+		data, err := io.ReadAll(reader)
+		if err != nil { log.Println("SERVER", err); return }
+		log.Println("SERVER got", method, data)
+		log.Println("SERVER send", method, data)
+		func (){
+			writer, err := trans.SendWriter(1)
+			if err != nil { log.Println("SERVER", err); return }
+			defer writer.Close()
+			_, err = writer.Write(data[:])
+			if err != nil { log.Println("SERVER", err); return }
+		}()
+	}
+}
+
+func handleErr(code int, err error) {
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%s: %v\n", os.Args[0], err)
+		os.Exit(code)
+	}
+}

examples/ping/client/main.go

@@ -4,10 +4,9 @@ import "os"
 import "io"
 import "fmt"
 import "log"
-import "net"
 import "time"
 import "errors"
-// import "context"
+import "context"
 import "git.tebibyte.media/sashakoshka/hopp"
 import "git.tebibyte.media/sashakoshka/hopp/examples/ping"