minimum infrastructure for pastebin sdk example (#379)

sdk/examples/pastebin/cmd/copyto/main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"github.com/openziti/zrok/environment"
+	"github.com/openziti/zrok/sdk"
+	"net"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func main() {
+	root, err := environment.LoadRoot()
+	if err != nil {
+		panic(err)
+	}
+
+	shr, err := sdk.CreateShare(root, &sdk.ShareRequest{
+		BackendMode: sdk.TcpTunnelBackendMode,
+		ShareMode:   sdk.PrivateShareMode,
+		Target:      "pastebin",
+	})
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("access your pastebin with: 'pastefrom %v'\n", shr.Token)
+
+	listener, err := sdk.NewListener(shr.Token, root)
+	if err != nil {
+		panic(err)
+	}
+
+	c := make(chan os.Signal)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-c
+		if err := sdk.DeleteShare(root, shr); err != nil {
+			panic(err)
+		}
+		_ = listener.Close()
+		os.Exit(0)
+	}()
+
+	for {
+		if conn, err := listener.Accept(); err == nil {
+			go handle(conn)
+		} else {
+			panic(err)
+		}
+	}
+}
+
+func handle(conn net.Conn) {
+	_, err := conn.Write([]byte("hello from pastebin"))
+	if err != nil {
+		fmt.Printf("error: %v\n", err)
+	}
+}

sdk/examples/pastebin/cmd/pastefrom/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"github.com/openziti/zrok/environment"
+	"github.com/openziti/zrok/sdk"
+	"os"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		panic("usage: pastefrom <shrToken>")
+	}
+	shrToken := os.Args[1]
+
+	root, err := environment.LoadRoot()
+	if err != nil {
+		panic(err)
+	}
+
+	acc, err := sdk.CreateAccess(root, &sdk.AccessRequest{ShareToken: shrToken})
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		if err := sdk.DeleteAccess(root, acc); err != nil {
+			panic(err)
+		}
+	}()
+
+	conn, err := sdk.NewDialer(shrToken, root)
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		_ = conn.Close()
+	}()
+
+	buf := make([]byte, 10240)
+	n, err := conn.Read(buf)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(string(buf[:n]))
+}