forked from bitfinexcom/bitfinex-api-go
/
test_ws_service.go
233 lines (210 loc) · 4.88 KB
/
test_ws_service.go
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package tests
import (
"bytes"
"fmt"
"log"
"net"
"net/http"
"sync"
"time"
"github.com/gorilla/websocket"
)
var upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
type client struct {
parent *TestWsService
*websocket.Conn
send chan []byte
received []string
lock sync.Mutex
}
func (c *client) writePump() {
for msg := range c.send {
err := c.Conn.WriteMessage(websocket.TextMessage, msg)
if err != nil {
log.Printf("could not send message (%s) to client: %s", string(msg), err.Error())
continue
}
}
}
func (c *client) readPump() {
defer func() {
c.parent.unregister <- c
c.Conn.Close()
}()
for {
_, message, err := c.Conn.ReadMessage()
if err != nil {
if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
log.Printf("error: %v", err)
}
log.Printf("test ws service drop client: %s", err.Error())
return
}
message = bytes.TrimSpace(bytes.Replace(message, []byte("\n"), []byte(" "), -1))
c.lock.Lock()
log.Printf("[DEBUG] WsClient -> WsService: %s", string(message))
c.received = append(c.received, string(message))
c.lock.Unlock()
}
}
type TestWsService struct {
clients map[*client]bool
listener net.Listener
port int
register chan *client
unregister chan *client
broadcast chan []byte
totalClients int
lock *sync.RWMutex
publishOnConnect string
}
func (s *TestWsService) WaitForClientCount(count int) error {
loops := 80
delay := time.Millisecond * 50
for i := 0; i < loops; i++ {
s.lock.RLock()
if s.totalClients == count {
return nil
}
s.lock.RUnlock()
time.Sleep(delay)
}
return fmt.Errorf("client peer #%d did not connect", count)
}
func (s *TestWsService) TotalClientCount() int {
return s.totalClients
}
func (s *TestWsService) PublishOnConnect(msg string) {
s.publishOnConnect = msg
}
func NewTestWsService(port int) *TestWsService {
return &TestWsService{
port: port,
clients: make(map[*client]bool),
register: make(chan *client),
unregister: make(chan *client),
broadcast: make(chan []byte),
lock: &sync.RWMutex{},
}
}
// Broadcast sends a message to all connected clients.
func (s *TestWsService) Broadcast(msg string) {
s.broadcast <- []byte(msg)
}
// ReceivedCount starts indexing clients at position 0.
func (s *TestWsService) ReceivedCount(clientNum int) int {
i := 0
for client := range s.clients {
if i == clientNum {
client.lock.Lock()
defer client.lock.Unlock()
return len(client.received)
}
i++
}
return 0
}
// Received starts indexing clients and message positions at position 0.
func (s *TestWsService) Received(clientNum int, msgNum int) (string, error) {
var client *client
i := 0
for client = range s.clients {
if i == clientNum {
break
}
i++
}
if client != nil {
client.lock.Lock()
defer client.lock.Unlock()
if len(client.received) > msgNum {
return string(client.received[msgNum]), nil
}
return "", fmt.Errorf("could not find message index %d, %d messages exist", msgNum, len(client.received))
}
return "", fmt.Errorf("could not find client %d", clientNum)
}
func (s *TestWsService) WaitForMessage(clientNum int, msgNum int) (string, error) {
loops := 80
delay := time.Millisecond * 50
var msg string
var err error
for i := 0; i < loops; i++ {
msg, err = s.Received(clientNum, msgNum)
if err != nil {
time.Sleep(delay)
} else {
return msg, nil
}
}
return "", err
}
func (s *TestWsService) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.serveWs(w, r)
}
func (s *TestWsService) Stop() {
//s.lock.RLock()
//defer s.lock.RUnlock()
s.listener.Close() // stop listening to http
for c := range s.clients {
c.Close()
}
}
//nolint
func (s *TestWsService) Start() error {
go s.loop()
l, err := net.Listen("tcp", fmt.Sprintf(":%d", s.port))
if err != nil {
return err
}
s.listener = l
go http.Serve(s.listener, s)
return nil
}
//nolint
func (s *TestWsService) serveWs(w http.ResponseWriter, r *http.Request) {
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Print(err)
return
}
s.totalClients++
client := &client{parent: s, Conn: conn, send: make(chan []byte, 256), received: make([]string, 0)}
go client.writePump()
go client.readPump()
s.clients[client] = true
if s.publishOnConnect != "" {
s.Broadcast(s.publishOnConnect)
}
}
func (s *TestWsService) loop() {
for {
select {
case client := <-s.register:
//s.lock.Lock()
s.clients[client] = true
//s.lock.Unlock()
case client := <-s.unregister:
if _, ok := s.clients[client]; ok {
//s.lock.Lock()
delete(s.clients, client)
close(client.send)
//s.lock.Unlock()
}
case msg := <-s.broadcast:
for client := range s.clients {
select {
case client.send <- msg:
default: // send failure
//s.lock.Lock()
close(client.send)
delete(s.clients, client)
//s.lock.Unlock()
}
}
}
}
}