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package rpc
import (
"bytes"
crand "crypto/rand"
"fmt"
"math/rand"
"net/http"
"os/exec"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
client "github.com/tendermint/go-rpc/client"
server "github.com/tendermint/go-rpc/server"
types "github.com/tendermint/go-rpc/types"
wire "github.com/tendermint/go-wire"
)
// Client and Server should work over tcp or unix sockets
const (
tcpAddr = "tcp://0.0.0.0:46657"
unixSocket = "/tmp/go-rpc.sock"
unixAddr = "unix:///tmp/go-rpc.sock"
websocketEndpoint = "/websocket/endpoint"
)
// Define a type for results and register concrete versions
type Result interface{}
type ResultEcho struct {
Value string
}
type ResultEchoBytes struct {
Value []byte
}
var _ = wire.RegisterInterface(
struct{ Result }{},
wire.ConcreteType{&ResultEcho{}, 0x1},
wire.ConcreteType{&ResultEchoBytes{}, 0x2},
)
// 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"),
}
func EchoResult(v string) (Result, error) {
return &ResultEcho{v}, nil
}
func EchoWSResult(wsCtx types.WSRPCContext, v string) (Result, error) {
return &ResultEcho{v}, nil
}
func EchoBytesResult(v []byte) (Result, error) {
return &ResultEchoBytes{v}, nil
}
// launch unix and tcp servers
func init() {
cmd := exec.Command("rm", "-f", unixSocket)
err := cmd.Start()
if err != nil {
panic(err)
}
if err = cmd.Wait(); err != nil {
panic(err)
}
mux := http.NewServeMux()
server.RegisterRPCFuncs(mux, Routes)
wm := server.NewWebsocketManager(Routes, nil)
mux.HandleFunc(websocketEndpoint, wm.WebsocketHandler)
go func() {
_, err := server.StartHTTPServer(tcpAddr, mux)
if err != nil {
panic(err)
}
}()
mux2 := http.NewServeMux()
server.RegisterRPCFuncs(mux2, Routes)
wm = server.NewWebsocketManager(Routes, nil)
mux2.HandleFunc(websocketEndpoint, wm.WebsocketHandler)
go func() {
_, err := server.StartHTTPServer(unixAddr, mux2)
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,
}
var result Result
if _, err := cl.Call("echo", params, &result); err != nil {
return "", err
}
return result.(*ResultEcho).Value, nil
}
func echoBytesViaHTTP(cl client.HTTPClient, bytes []byte) ([]byte, error) {
params := map[string]interface{}{
"arg": bytes,
}
var result Result
if _, err := cl.Call("echo_bytes", params, &result); err != nil {
return []byte{}, err
}
return result.(*ResultEchoBytes).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)
}
func echoViaWS(cl *client.WSClient, val string) (string, error) {
params := map[string]interface{}{
"arg": val,
}
err := cl.Call("echo", params)
if err != nil {
return "", err
}
select {
case msg := <-cl.ResultsCh:
result := new(Result)
wire.ReadJSONPtr(result, msg, &err)
if err != nil {
return "", nil
}
return (*result).(*ResultEcho).Value, nil
case err := <-cl.ErrorsCh:
return "", err
}
}
func echoBytesViaWS(cl *client.WSClient, bytes []byte) ([]byte, error) {
params := map[string]interface{}{
"arg": bytes,
}
err := cl.Call("echo_bytes", params)
if err != nil {
return []byte{}, err
}
select {
case msg := <-cl.ResultsCh:
result := new(Result)
wire.ReadJSONPtr(result, msg, &err)
if err != nil {
return []byte{}, nil
}
return (*result).(*ResultEchoBytes).Value, nil
case err := <-cl.ErrorsCh:
return []byte{}, err
}
}
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(tcpAddr)
fmt.Printf("=== testing server on %s using %v client", addr, cl2)
testWithHTTPClient(t, cl2)
cl3 := client.NewWSClient(tcpAddr, websocketEndpoint)
_, 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)
_, err := cl.Start()
require.Nil(t, err)
defer cl.Stop()
val := "acbd"
params := map[string]interface{}{
"arg": val,
}
err = cl.WriteJSON(types.RPCRequest{
JSONRPC: "2.0",
ID: "",
Method: "echo_ws",
Params: params,
})
require.Nil(t, err)
select {
case msg := <-cl.ResultsCh:
result := new(Result)
wire.ReadJSONPtr(result, msg, &err)
require.Nil(t, err)
got := (*result).(*ResultEcho).Value
assert.Equal(t, got, val)
case err := <-cl.ErrorsCh:
t.Fatal(err)
}
}
func TestWSHandlesArrayParams(t *testing.T) {
cl := client.NewWSClient(tcpAddr, websocketEndpoint)
_, err := cl.Start()
require.Nil(t, err)
defer cl.Stop()
val := "acbd"
params := []interface{}{val}
err = cl.WriteJSON(types.RPCRequest{
JSONRPC: "2.0",
ID: "",
Method: "echo_ws",
Params: params,
})
require.Nil(t, err)
select {
case msg := <-cl.ResultsCh:
result := new(Result)
wire.ReadJSONPtr(result, msg, &err)
require.Nil(t, err)
got := (*result).(*ResultEcho).Value
assert.Equal(t, got, val)
case err := <-cl.ErrorsCh:
t.Fatalf("%+v", err)
}
}
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)
}