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server_test.go
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server_test.go
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package remotedialer
import (
"context"
"errors"
"fmt"
"io"
"net/http"
"sync"
"testing"
"time"
"github.com/gorilla/mux"
)
func TestBasic(t *testing.T) {
// start a server
PrintTunnelData = true
handler := New(authorizer, DefaultErrorWriter)
handler.ClientConnectAuthorizer = func(proto, address string) bool {
return true
}
fmt.Println("Listening on ", "127.0.0.1:22222")
errChan := make(chan error, 3)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
router := mux.NewRouter()
router.Handle("/connect", handler)
wsServer := &http.Server{
Handler: router,
Addr: "127.0.0.1:22222",
}
go func() {
defer cancel()
err := wsServer.ListenAndServe()
if err != nil {
errChan <- err
}
}()
router2 := mux.NewRouter()
router2.Handle("/hello", http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
_, _ = fmt.Fprintf(writer, "Hi")
}))
helloServer := &http.Server{
Handler: router2,
Addr: "127.0.0.1:22223",
}
go func() {
defer cancel()
err := helloServer.ListenAndServe()
if err != nil {
errChan <- err
}
}()
go func() {
err := ClientConnect(ctx, "ws://127.0.0.1:22222/connect", http.Header{
"X-Tunnel-ID": []string{"foo"},
}, nil, func(string, string) bool { return true }, func(ctx context.Context, session *Session) error {
client := &http.Client{
Transport: &http.Transport{
DialContext: session.Dial,
},
}
resp, err := client.Get("http://127.0.0.1:22223/hello")
if err != nil {
return err
}
defer resp.Body.Close()
out, err := io.ReadAll(resp.Body)
if err != nil {
return fmt.Errorf("read body: %w", err)
} else if string(out) != "Hi" {
return fmt.Errorf("unexpected answer: %s", string(out))
}
errChan <- nil
return nil
})
errChan <- err
}()
err := <-errChan
_ = wsServer.Close()
_ = helloServer.Close()
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
func TestPeers(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// start a server
PrintTunnelData = true
peer1, peer1Server := startServer("peer-1", "127.0.0.1:22222")
defer peer1Server.Close()
peer2, peer2Server := startServer("peer-2", "127.0.0.1:22223")
defer peer2Server.Close()
startHttpServer("127.0.0.1:22224")
// connect peer1 -> peer2
peer1.AddPeer(ctx, "ws://127.0.0.1:22223/connect", "peer-2")
// client connect to peer 1
go func() {
err := ClientConnect(ctx, "ws://127.0.0.1:22222/connect", http.Header{
"X-Tunnel-ID": []string{"to-peer-1"},
}, nil, func(string, string) bool { return true }, func(ctx context.Context, session *Session) error {
return nil
})
if err != nil {
panic(err)
}
}()
// test request
time.Sleep(time.Second * 1)
testHttpRequest(peer2.Dialer("to-peer-1"))
fmt.Println("OTHER WAY AROUND")
// connect peer2 -> peer1
peer2.AddPeer(ctx, "ws://127.0.0.1:22222/connect", "peer-1")
// client connect to peer 2
go func() {
err := ClientConnect(ctx, "ws://127.0.0.1:22223/connect", http.Header{
"X-Tunnel-ID": []string{"to-peer-2"},
}, nil, func(string, string) bool { return true }, func(ctx context.Context, session *Session) error {
return nil
})
if err != nil {
panic(err)
}
}()
// test connections
time.Sleep(time.Second * 1)
testHttpRequest(peer1.Dialer("to-peer-2"))
}
func testHttpRequest(dial Dialer) {
waitGroup := sync.WaitGroup{}
for i := 0; i < 15; i++ {
waitGroup.Add(1)
go func() {
defer waitGroup.Done()
httpClient := &http.Client{
Transport: &http.Transport{
DialContext: dial,
ForceAttemptHTTP2: true,
MaxIdleConns: 100,
IdleConnTimeout: 90 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
},
}
resp, err := httpClient.Get("http://127.0.0.1:22224/hello")
if err != nil {
panic(err)
}
out, err := io.ReadAll(resp.Body)
if err != nil {
panic(err)
} else if string(out) != "Hi" {
panic(string(out))
}
}()
}
waitGroup.Wait()
}
func startHttpServer(address string) {
router2 := mux.NewRouter()
router2.Handle("/hello", http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
_, _ = fmt.Fprintf(writer, "Hi")
}))
helloServer := &http.Server{
Handler: router2,
Addr: address,
}
go func() {
err := helloServer.ListenAndServe()
if err != nil && !errors.Is(err, http.ErrServerClosed) {
panic(err)
}
}()
}
func startServer(peerID, address string) (*Server, *http.Server) {
handler := New(authorizer, DefaultErrorWriter)
handler.ClientConnectAuthorizer = func(proto, address string) bool {
return true
}
handler.PeerID = peerID
handler.PeerToken = peerID
handler.PeerAuthorizer = func(req *http.Request, id, token string) bool { return true }
router := mux.NewRouter()
router.Handle("/connect", handler)
wsServer := &http.Server{
Handler: router,
Addr: address,
}
go func() {
err := wsServer.ListenAndServe()
if err != nil && !errors.Is(err, http.ErrServerClosed) {
panic(err)
}
}()
return handler, wsServer
}
func authorizer(req *http.Request) (string, bool, error) {
id := req.Header.Get("x-tunnel-id")
return id, id != "", nil
}