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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"
amino "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, server.Config{})
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, server.Config{})
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 URI client", addr)
testWithHTTPClient(t, cl1)
cl2 := client.NewJSONRPCClient(addr)
fmt.Printf("=== testing server on %s using JSONRPC client", addr)
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 WS client", addr)
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)
}