/
conn.go
157 lines (130 loc) · 2.27 KB
/
conn.go
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/**
* go run conn.go > conn.log 2>&1
* sudo sysctl -w kern.maxfiles=65536
* ulimit -n 65536
*/
package main
import (
"bufio"
"bytes"
"io"
"io/ioutil"
"log"
"net/http"
"golang.org/x/net/websocket"
)
func main() {
log.Println("WebSocket Bench")
wrapper(func() (ch chan bool) {
ch = wsCli("ws://127.0.0.1:3000/subscribe")
return
})
log.Println("Server-Sent Events Bench")
wrapper(func() (ch chan bool) {
ch = sseCli("http://127.0.0.1:3000/sse")
return
})
}
func wrapper(client func() chan bool) {
chs := make([]chan bool, 10000)
for i := range chs {
log.Println(i)
chs[i] = client()
}
jsonBuffer := bytes.NewBuffer([]byte(`{
"channel": "test",
"ttl": 0,
"data": {"message": "json"}
}`))
res, err := http.Post("http://127.0.0.1:3000/", "application/json", jsonBuffer)
if err != nil {
panic(err)
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
if err != nil {
panic(err)
}
log.Println(string(body))
for _, ch := range chs {
<-ch
}
}
func sseCli(url string) (ch chan bool) {
defer catchError()
ch = make(chan bool, 1)
res, err := http.Get(url)
if err != nil {
go func() {
ch <- true
}()
log.Println("sse: connection failure")
panic(err)
}
sc := bufio.NewScanner(res.Body)
go func() {
defer res.Body.Close()
defer func() {
ch <- true
}()
for {
switch {
case res.Close:
log.Println("closed")
return
case sc.Scan():
line := sc.Text()
log.Println(line)
// auto close
if line == "\n" {
return
}
}
}
}()
return
}
func wsCli(url string) (ch chan bool) {
defer catchError()
ch = make(chan bool, 1)
ws, err := websocket.Dial(url, "", "http://localhost/")
if err != nil {
go func() {
ch <- true
}()
log.Println("ws: connection failure")
panic(err)
}
go func() {
defer ws.Close()
defer func() {
ch <- true
}()
for {
var msg string
err := websocket.Message.Receive(ws, &msg)
if err != nil {
if err == io.EOF {
log.Println("close event")
return
}
panic(err)
}
log.Println(msg)
// auto close
return
}
}()
return
}
func catchError() {
cause := recover()
if cause == nil {
return
}
err, check := cause.(error)
if check == false {
panic(cause)
}
log.Println("error:", err.Error())
}