![](/img/trans.png)
[英]Using AWS IoT's ThingShadow with a Websocket Connection
[英]Websocket connection drops using Golang's gorilla/websocket package
我正在尝试移植一个NodeJS脚本,该脚本使用gorilla / websocket包建立并维护与第三方服务器的Websocket连接。 在Node脚本中 ,ping之后会收到一个pong,并且连接将无限期地保持活动状态。 在Go脚本中 ,ping / pong可以正常工作,但是大约30秒后服务器会断开连接。
我怀疑使用Go websocket包发送的ping是不正确的,但我无法确定原因。 在运行这些程序时比较捕获的加密网络流量,显示TCP请求和响应的响应长度没有差异,因此这可能不是问题。 任何帮助将不胜感激!
websocket.js
#!/usr/bin/env node
// npm install websocket@1.0.25 --save
const WebSocketClient = require('websocket').client;
const client = new WebSocketClient();
let lastPing = new Date().getTime();
client.on('connectFailed', function(error) {
console.log('Connect Error: ' + error.toString());
});
client.on('connect', function(connection) {
console.log('Connected to Server...');
connection.on('error', function(error) {
console.log("Connection Error: " + error.toString());
});
connection.on('close', function() {
console.log('Connection Closed');
});
connection.on('message', function(message) {
if (message.type === 'utf8') {
console.log(message.utf8Data);
}
});
connection.on('pong', function(){
console.log('[pingpong] response took', (new Date().getTime() - lastPing) + 'ms');
})
function send(message) {
if (connection.connected) {
connection.sendUTF(message);
}
}
// Send a ping every 10s
// to keep the connection live
setInterval(function(){
lastPing = new Date().getTime();
connection.ping();
}, 10000);
});
client.connect('wss://ws.radarrelay.com/0x/v0/ws');
websocket.go
package main
import (
"flag"
"log"
"os"
"os/signal"
"time"
"github.com/gorilla/websocket"
)
var addr = "wss://api.radarrelay.com/0x/v0/ws"
func main() {
flag.Parse()
log.SetFlags(0)
timeoutDuration := 2 * time.Minute
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, os.Interrupt)
c, _, err := websocket.DefaultDialer.Dial(addr, nil)
if err != nil {
log.Fatal("dial:", err)
} else {
log.Println("Connected to server")
}
c.SetPongHandler(func(str string) error {
log.Println("pong received", str)
return nil
})
defer c.Close()
done := make(chan struct{})
go func() {
defer c.Close()
defer close(done)
for {
c.SetReadDeadline(time.Now().Add(timeoutDuration))
_, message, err := c.ReadMessage()
if err != nil {
log.Println("read:", err)
return
}
if len(message) >= 2 {
message = message[2:]
}
log.Printf("recv: %s", message)
}
}()
ticker := time.NewTicker(10 * time.Second)
defer ticker.Stop()
for {
select {
case _ = <-ticker.C:
err := c.WriteMessage(websocket.PingMessage, []byte{})
if err != nil {
log.Println("write:", err)
return
} else {
log.Println("ping sent")
}
case <-interrupt:
log.Println("interrupt")
// To cleanly close a connection, a client should send a close
// frame and wait for the server to close the connection.
err := c.WriteMessage(
websocket.CloseMessage,
websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
if err != nil {
log.Println("write close:", err)
return
}
select {
case <-done:
case <-time.After(time.Second):
}
c.Close()
return
}
}
}
addr在两者之间是不同的。 节点代码正在与之交谈
wss://ws.radarrelay.com/0x/v0/ws
go代码正在与之交谈:
wss://api.radarrelay.com/0x/v0/ws
看起来这些解析为不同的IP,因此它们可能具有不同的入口基础结构,并且在子域上存在超时,该子域不存在于ws子域中。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.