package rpc import ( "bytes" "context" crand "crypto/rand" "encoding/json" "fmt" "math/rand" "net/http" "os" "os/exec" "testing" "time" "github.com/go-kit/kit/log/term" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" "github.com/tendermint/go-amino" cmn "github.com/tendermint/tmlibs/common" "github.com/tendermint/tmlibs/log" client "github.com/tendermint/tendermint/rpc/lib/client" server "github.com/tendermint/tendermint/rpc/lib/server" types "github.com/tendermint/tendermint/rpc/lib/types" ) // Client and Server should work over tcp or unix sockets const ( tcpAddr = "tcp://0.0.0.0:47768" unixSocket = "/tmp/rpc_test.sock" unixAddr = "unix://" + unixSocket websocketEndpoint = "/websocket/endpoint" ) type ResultEcho struct { Value string `json:"value"` } type ResultEchoInt struct { Value int `json:"value"` } type ResultEchoBytes struct { Value []byte `json:"value"` } type ResultEchoDataBytes struct { Value cmn.HexBytes `json:"value"` } // Define some routes var Routes = map[string]*server.RPCFunc{ "echo": server.NewRPCFunc(EchoResult, "arg"), "echo_ws": server.NewWSRPCFunc(EchoWSResult, "arg"), "echo_bytes": server.NewRPCFunc(EchoBytesResult, "arg"), "echo_data_bytes": server.NewRPCFunc(EchoDataBytesResult, "arg"), "echo_int": server.NewRPCFunc(EchoIntResult, "arg"), } // Amino codec required to encode/decode everything above. var RoutesCdc = amino.NewCodec() func EchoResult(v string) (*ResultEcho, error) { return &ResultEcho{v}, nil } func EchoWSResult(wsCtx types.WSRPCContext, v string) (*ResultEcho, error) { return &ResultEcho{v}, nil } func EchoIntResult(v int) (*ResultEchoInt, error) { return &ResultEchoInt{v}, nil } func EchoBytesResult(v []byte) (*ResultEchoBytes, error) { return &ResultEchoBytes{v}, nil } func EchoDataBytesResult(v cmn.HexBytes) (*ResultEchoDataBytes, error) { return &ResultEchoDataBytes{v}, nil } func TestMain(m *testing.M) { setup() code := m.Run() os.Exit(code) } var colorFn = func(keyvals ...interface{}) term.FgBgColor { for i := 0; i < len(keyvals)-1; i += 2 { if keyvals[i] == "socket" { if keyvals[i+1] == "tcp" { return term.FgBgColor{Fg: term.DarkBlue} } else if keyvals[i+1] == "unix" { return term.FgBgColor{Fg: term.DarkCyan} } } } return term.FgBgColor{} } // launch unix and tcp servers func setup() { logger := log.NewTMLoggerWithColorFn(log.NewSyncWriter(os.Stdout), colorFn) cmd := exec.Command("rm", "-f", unixSocket) err := cmd.Start() if err != nil { panic(err) } if err = cmd.Wait(); err != nil { panic(err) } tcpLogger := logger.With("socket", "tcp") mux := http.NewServeMux() server.RegisterRPCFuncs(mux, Routes, RoutesCdc, tcpLogger) wm := server.NewWebsocketManager(Routes, RoutesCdc, server.ReadWait(5*time.Second), server.PingPeriod(1*time.Second)) wm.SetLogger(tcpLogger) mux.HandleFunc(websocketEndpoint, wm.WebsocketHandler) go func() { _, err := server.StartHTTPServer(tcpAddr, mux, tcpLogger) if err != nil { panic(err) } }() unixLogger := logger.With("socket", "unix") mux2 := http.NewServeMux() server.RegisterRPCFuncs(mux2, Routes, RoutesCdc, unixLogger) wm = server.NewWebsocketManager(Routes, RoutesCdc) wm.SetLogger(unixLogger) mux2.HandleFunc(websocketEndpoint, wm.WebsocketHandler) go func() { _, err := server.StartHTTPServer(unixAddr, mux2, unixLogger) if err != nil { panic(err) } }() // wait for servers to start time.Sleep(time.Second * 2) } func echoViaHTTP(cl client.HTTPClient, val string) (string, error) { params := map[string]interface{}{ "arg": val, } result := new(ResultEcho) if _, err := cl.Call("echo", params, result); err != nil { return "", err } return result.Value, nil } func echoIntViaHTTP(cl client.HTTPClient, val int) (int, error) { params := map[string]interface{}{ "arg": val, } result := new(ResultEchoInt) if _, err := cl.Call("echo_int", params, result); err != nil { return 0, err } return result.Value, nil } func echoBytesViaHTTP(cl client.HTTPClient, bytes []byte) ([]byte, error) { params := map[string]interface{}{ "arg": bytes, } result := new(ResultEchoBytes) if _, err := cl.Call("echo_bytes", params, result); err != nil { return []byte{}, err } return result.Value, nil } func echoDataBytesViaHTTP(cl client.HTTPClient, bytes cmn.HexBytes) (cmn.HexBytes, error) { params := map[string]interface{}{ "arg": bytes, } result := new(ResultEchoDataBytes) if _, err := cl.Call("echo_data_bytes", params, result); err != nil { return []byte{}, err } return result.Value, nil } func testWithHTTPClient(t *testing.T, cl client.HTTPClient) { val := "acbd" got, err := echoViaHTTP(cl, val) require.Nil(t, err) assert.Equal(t, got, val) val2 := randBytes(t) got2, err := echoBytesViaHTTP(cl, val2) require.Nil(t, err) assert.Equal(t, got2, val2) val3 := cmn.HexBytes(randBytes(t)) got3, err := echoDataBytesViaHTTP(cl, val3) require.Nil(t, err) assert.Equal(t, got3, val3) val4 := rand.Intn(10000) got4, err := echoIntViaHTTP(cl, val4) require.Nil(t, err) assert.Equal(t, got4, val4) } func echoViaWS(cl *client.WSClient, val string) (string, error) { params := map[string]interface{}{ "arg": val, } err := cl.Call(context.Background(), "echo", params) if err != nil { return "", err } msg := <-cl.ResponsesCh if msg.Error != nil { return "", err } result := new(ResultEcho) err = json.Unmarshal(msg.Result, result) if err != nil { return "", nil } return result.Value, nil } func echoBytesViaWS(cl *client.WSClient, bytes []byte) ([]byte, error) { params := map[string]interface{}{ "arg": bytes, } err := cl.Call(context.Background(), "echo_bytes", params) if err != nil { return []byte{}, err } msg := <-cl.ResponsesCh if msg.Error != nil { return []byte{}, msg.Error } result := new(ResultEchoBytes) err = json.Unmarshal(msg.Result, result) if err != nil { return []byte{}, nil } return result.Value, nil } func testWithWSClient(t *testing.T, cl *client.WSClient) { val := "acbd" got, err := echoViaWS(cl, val) require.Nil(t, err) assert.Equal(t, got, val) val2 := randBytes(t) got2, err := echoBytesViaWS(cl, val2) require.Nil(t, err) assert.Equal(t, got2, val2) } //------------- func TestServersAndClientsBasic(t *testing.T) { serverAddrs := [...]string{tcpAddr, unixAddr} for _, addr := range serverAddrs { cl1 := client.NewURIClient(addr) fmt.Printf("=== testing server on %s using %v client", addr, cl1) testWithHTTPClient(t, cl1) cl2 := client.NewJSONRPCClient(addr) fmt.Printf("=== testing server on %s using %v client", addr, cl2) testWithHTTPClient(t, cl2) cl3 := client.NewWSClient(addr, websocketEndpoint) cl3.SetLogger(log.TestingLogger()) err := cl3.Start() require.Nil(t, err) fmt.Printf("=== testing server on %s using %v client", addr, cl3) testWithWSClient(t, cl3) cl3.Stop() } } func TestHexStringArg(t *testing.T) { cl := client.NewURIClient(tcpAddr) // should NOT be handled as hex val := "0xabc" got, err := echoViaHTTP(cl, val) require.Nil(t, err) assert.Equal(t, got, val) } func TestQuotedStringArg(t *testing.T) { cl := client.NewURIClient(tcpAddr) // should NOT be unquoted val := "\"abc\"" got, err := echoViaHTTP(cl, val) require.Nil(t, err) assert.Equal(t, got, val) } func TestWSNewWSRPCFunc(t *testing.T) { cl := client.NewWSClient(tcpAddr, websocketEndpoint) cl.SetLogger(log.TestingLogger()) err := cl.Start() require.Nil(t, err) defer cl.Stop() val := "acbd" params := map[string]interface{}{ "arg": val, } err = cl.Call(context.Background(), "echo_ws", params) require.Nil(t, err) msg := <-cl.ResponsesCh if msg.Error != nil { t.Fatal(err) } result := new(ResultEcho) err = json.Unmarshal(msg.Result, result) require.Nil(t, err) got := result.Value assert.Equal(t, got, val) } func TestWSHandlesArrayParams(t *testing.T) { cl := client.NewWSClient(tcpAddr, websocketEndpoint) cl.SetLogger(log.TestingLogger()) err := cl.Start() require.Nil(t, err) defer cl.Stop() val := "acbd" params := []interface{}{val} err = cl.CallWithArrayParams(context.Background(), "echo_ws", params) require.Nil(t, err) msg := <-cl.ResponsesCh if msg.Error != nil { t.Fatalf("%+v", err) } result := new(ResultEcho) err = json.Unmarshal(msg.Result, result) require.Nil(t, err) got := result.Value assert.Equal(t, got, val) } // TestWSClientPingPong checks that a client & server exchange pings // & pongs so connection stays alive. func TestWSClientPingPong(t *testing.T) { cl := client.NewWSClient(tcpAddr, websocketEndpoint) cl.SetLogger(log.TestingLogger()) err := cl.Start() require.Nil(t, err) defer cl.Stop() time.Sleep(6 * time.Second) } func randBytes(t *testing.T) []byte { n := rand.Intn(10) + 2 buf := make([]byte, n) _, err := crand.Read(buf) require.Nil(t, err) return bytes.Replace(buf, []byte("="), []byte{100}, -1) }