81 lines
1.5 KiB
Go
81 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"log"
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"net/http"
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"os"
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"time"
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"github.com/gorilla/websocket"
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)
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var podName string
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var upgrader = websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool {
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return true // Ignore http origin
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},
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}
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func init() {
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podName = os.Getenv("podname")
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}
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func ws(w http.ResponseWriter, r *http.Request) {
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log.Println("Received request", r.RemoteAddr)
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Println("failed to upgrade:", err)
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return
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}
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defer c.Close()
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s := fmt.Sprintf("Connected to %v", podName)
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c.WriteMessage(websocket.TextMessage, []byte(s))
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handleWSConn(c)
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}
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func handleWSConn(c *websocket.Conn) {
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stop := make(chan struct{})
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go func() {
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for {
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time.Sleep(5 * time.Second)
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select {
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case <-stop:
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return
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default:
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}
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s := fmt.Sprintf("%s reports time: %v", podName, time.Now().String())
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c.WriteMessage(websocket.TextMessage, []byte(s))
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}
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}()
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for {
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mt, message, err := c.ReadMessage()
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if err != nil {
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log.Println("Error while reading:", err)
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break
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}
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if err = c.WriteMessage(mt, message); err != nil {
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log.Println("Error while writing:", err)
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break
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}
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}
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close(stop)
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}
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func root(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path != "/" {
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http.NotFound(w, r)
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return
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}
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w.Write([]byte(`Websocket example. Connect to /ws`))
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}
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func main() {
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log.Println("Starting")
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http.HandleFunc("/ws", ws)
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http.HandleFunc("/", root)
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log.Fatal(http.ListenAndServe(":8080", nil))
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}
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