大家!我试图让与OpenStack的串行控制台我去的代码工作。它`通过网络窝中露出。我有与它的问题。
我发现gorrilla的WebSocket LIB(这是伟大的),把this example 作为参考
有了一些调整,现在我有这样的代码:
package main
import (
"log"
"net/url"
"os"
"os/signal"
"time"
"net/http"
"github.com/gorilla/websocket"
)
func main() {
DialSettings := &websocket.Dialer {
Proxy: http.ProxyFromEnvironment,
HandshakeTimeout: 45 * time.Second,
Subprotocols: []string{"binary",},
ReadBufferSize: 4096,
WriteBufferSize: 4096,
}
log.SetFlags(0)
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, os.Interrupt)
u, _ := url.Parse("ws://172.17.0.64:6083/?token=d1763f2b-3466-424c-aece-6aeea2a733d5") //websocket url as it outputs from 'nova get-serial-console test' cmd
log.Printf("connecting to %s", u.String())
c, _, err := DialSettings.Dial(u.String(), nil)
if err != nil {
log.Fatal("dial:", err)
}
defer c.Close()
done := make(chan struct{})
go func() {
defer close(done)
for {
_, message, err := c.ReadMessage()
if err != nil {
log.Println("read:", err)
return
}
log.Printf("%s", message)
}
}()
c.WriteMessage(websocket.TextMessage, []byte("\n")) //just to force output to console
for {
select {
case <-done:
return
case <-interrupt:
log.Println("interrupt")
// Cleanly close the connection by sending a close message and then
// waiting (with timeout) 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):
}
return
}
}
}
我得到这样的输出:
connecting to ws://172.17.0.64:6083/?token=d1763f2b-3466-424c-aece-6aeea2a733d5
CentOS Linux 7
(C
ore)
K
erne
l
3.10.0-862.el7.x86_64
o
n an
x
86_64
centos
-test login:
一塌糊涂......
我想这是因为我收到只是一个字节的块,没有办法分隔。我需要一些缓冲来存储它们,当这样做bufio.ReadLine
。但我不是最有经验的程序员去,和我江郎才尽如何做到这一点。最后我只需要串的工作。
在log封装在单独的行中写入每个日志消息。如果日志消息不以新行终止,那么日志包将增加一个。
这些额外的换行符错乱输出。固定输出,调用替换与不换行添加到输出的功能,log.Printf("%s", message)
。这里有一些选择:
写消息到stderr(相同的目的地默认日志包配置):
os.Stderr.Write(message)
写邮件到stdout(更常规的位置写入程序输出):
os.Stdout.Write(message)