You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
232 lines
4.7 KiB
232 lines
4.7 KiB
package client
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"net/http"
|
|
"net/http/httptest"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/gorilla/websocket"
|
|
"github.com/stretchr/testify/require"
|
|
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
|
|
types "github.com/tendermint/tendermint/rpc/jsonrpc/types"
|
|
)
|
|
|
|
var wsCallTimeout = 5 * time.Second
|
|
|
|
type myHandler struct {
|
|
closeConnAfterRead bool
|
|
mtx sync.RWMutex
|
|
}
|
|
|
|
var upgrader = websocket.Upgrader{
|
|
ReadBufferSize: 1024,
|
|
WriteBufferSize: 1024,
|
|
}
|
|
|
|
func (h *myHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
conn, err := upgrader.Upgrade(w, r, nil)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer conn.Close() // nolint: errcheck
|
|
for {
|
|
messageType, in, err := conn.ReadMessage()
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
var req types.RPCRequest
|
|
err = json.Unmarshal(in, &req)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
h.mtx.RLock()
|
|
if h.closeConnAfterRead {
|
|
if err := conn.Close(); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
h.mtx.RUnlock()
|
|
|
|
res := json.RawMessage(`{}`)
|
|
emptyRespBytes, _ := json.Marshal(types.RPCResponse{Result: res, ID: req.ID})
|
|
if err := conn.WriteMessage(messageType, emptyRespBytes); err != nil {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestWSClientReconnectsAfterReadFailure(t *testing.T) {
|
|
var wg sync.WaitGroup
|
|
|
|
// start server
|
|
h := &myHandler{}
|
|
s := httptest.NewServer(h)
|
|
defer s.Close()
|
|
|
|
c := startClient(t, "//"+s.Listener.Addr().String())
|
|
defer c.Stop()
|
|
|
|
wg.Add(1)
|
|
go callWgDoneOnResult(t, c, &wg)
|
|
|
|
h.mtx.Lock()
|
|
h.closeConnAfterRead = true
|
|
h.mtx.Unlock()
|
|
|
|
// results in WS read error, no send retry because write succeeded
|
|
call(t, "a", c)
|
|
|
|
// expect to reconnect almost immediately
|
|
time.Sleep(10 * time.Millisecond)
|
|
h.mtx.Lock()
|
|
h.closeConnAfterRead = false
|
|
h.mtx.Unlock()
|
|
|
|
// should succeed
|
|
call(t, "b", c)
|
|
|
|
wg.Wait()
|
|
}
|
|
|
|
func TestWSClientReconnectsAfterWriteFailure(t *testing.T) {
|
|
var wg sync.WaitGroup
|
|
|
|
// start server
|
|
h := &myHandler{}
|
|
s := httptest.NewServer(h)
|
|
|
|
c := startClient(t, "//"+s.Listener.Addr().String())
|
|
defer c.Stop()
|
|
|
|
wg.Add(2)
|
|
go callWgDoneOnResult(t, c, &wg)
|
|
|
|
// hacky way to abort the connection before write
|
|
if err := c.conn.Close(); err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
// results in WS write error, the client should resend on reconnect
|
|
call(t, "a", c)
|
|
|
|
// expect to reconnect almost immediately
|
|
time.Sleep(10 * time.Millisecond)
|
|
|
|
// should succeed
|
|
call(t, "b", c)
|
|
|
|
wg.Wait()
|
|
}
|
|
|
|
func TestWSClientReconnectFailure(t *testing.T) {
|
|
// start server
|
|
h := &myHandler{}
|
|
s := httptest.NewServer(h)
|
|
|
|
c := startClient(t, "//"+s.Listener.Addr().String())
|
|
defer c.Stop()
|
|
|
|
go func() {
|
|
for {
|
|
select {
|
|
case <-c.ResponsesCh:
|
|
case <-c.Quit():
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
// hacky way to abort the connection before write
|
|
if err := c.conn.Close(); err != nil {
|
|
t.Error(err)
|
|
}
|
|
s.Close()
|
|
|
|
// results in WS write error
|
|
// provide timeout to avoid blocking
|
|
ctx, cancel := context.WithTimeout(context.Background(), wsCallTimeout)
|
|
defer cancel()
|
|
if err := c.Call(ctx, "a", make(map[string]interface{})); err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
// expect to reconnect almost immediately
|
|
time.Sleep(10 * time.Millisecond)
|
|
|
|
done := make(chan struct{})
|
|
go func() {
|
|
// client should block on this
|
|
call(t, "b", c)
|
|
close(done)
|
|
}()
|
|
|
|
// test that client blocks on the second send
|
|
select {
|
|
case <-done:
|
|
t.Fatal("client should block on calling 'b' during reconnect")
|
|
case <-time.After(5 * time.Second):
|
|
t.Log("All good")
|
|
}
|
|
}
|
|
|
|
func TestNotBlockingOnStop(t *testing.T) {
|
|
timeout := 2 * time.Second
|
|
s := httptest.NewServer(&myHandler{})
|
|
c := startClient(t, "//"+s.Listener.Addr().String())
|
|
c.Call(context.Background(), "a", make(map[string]interface{}))
|
|
// Let the readRoutine get around to blocking
|
|
time.Sleep(time.Second)
|
|
passCh := make(chan struct{})
|
|
go func() {
|
|
// Unless we have a non-blocking write to ResponsesCh from readRoutine
|
|
// this blocks forever ont the waitgroup
|
|
c.Stop()
|
|
passCh <- struct{}{}
|
|
}()
|
|
select {
|
|
case <-passCh:
|
|
// Pass
|
|
case <-time.After(timeout):
|
|
t.Fatalf("WSClient did failed to stop within %v seconds - is one of the read/write routines blocking?",
|
|
timeout.Seconds())
|
|
}
|
|
}
|
|
|
|
func startClient(t *testing.T, addr string) *WSClient {
|
|
c, err := NewWS(addr, "/websocket")
|
|
require.Nil(t, err)
|
|
err = c.Start()
|
|
require.Nil(t, err)
|
|
c.SetLogger(log.TestingLogger())
|
|
return c
|
|
}
|
|
|
|
func call(t *testing.T, method string, c *WSClient) {
|
|
err := c.Call(context.Background(), method, make(map[string]interface{}))
|
|
require.NoError(t, err)
|
|
}
|
|
|
|
func callWgDoneOnResult(t *testing.T, c *WSClient, wg *sync.WaitGroup) {
|
|
for {
|
|
select {
|
|
case resp := <-c.ResponsesCh:
|
|
if resp.Error != nil {
|
|
t.Errorf("unexpected error: %v", resp.Error)
|
|
return
|
|
}
|
|
if resp.Result != nil {
|
|
wg.Done()
|
|
}
|
|
case <-c.Quit():
|
|
return
|
|
}
|
|
}
|
|
}
|