139 lines
3.3 KiB
Go
139 lines
3.3 KiB
Go
// Copyright 2015 The Gorilla WebSocket Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// import "flag"
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import "log"
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import "net/url"
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import "os"
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import "os/signal"
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import "time"
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import "github.com/gorilla/websocket"
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import "github.com/golang/protobuf/proto"
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import pb "git.wit.com/wit/witProtobuf"
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var gorillaConn *websocket.Conn
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func readGorillaConn(conn *websocket.Conn) {
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for {
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mytype, message, err := conn.ReadMessage()
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if err != nil {
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log.Println("read:", err)
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return
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}
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if (mytype == websocket.BinaryMessage) {
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protobufMsg := new(pb.Event)
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err = proto.Unmarshal(message, protobufMsg)
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if (err != nil) {
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log.Printf("readConn() something fucked up happened in Unmarshal")
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}
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log.Printf("readGorillaConn() successfully read protobuf from gorilla websocket")
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addEvent(protobufMsg)
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} else {
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log.Printf("recv: %s", message)
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// log.Printf("type, err = ", mytype, err)
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}
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time.Sleep(time.Second)
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log.Println("gorilla readGorillaConn()", time.Now())
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}
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}
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func gorillaSendProtobuf() {
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if (gorillaConn == nil) {
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log.Println("gorillaSendProtobuf() gorillaConn == nil")
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log.Println("Need to re-open connection here")
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return
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}
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msg := pb.CreateSampleEvent()
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msg.Name = "test echo over gorilla websocket"
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data, _ := proto.Marshal(msg)
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err2 := gorillaConn.WriteMessage(websocket.BinaryMessage, data)
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if err2 != nil {
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log.Println("write:", err2)
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gorillaConn = nil
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return
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}
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}
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func closeGorillaConn() {
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if gorillaConn == nil {
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log.Println("gorillaConn already was nil")
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return
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}
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// Cleanly close the connection by sending a close message and then
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// waiting (with timeout) for the server to close the connection.
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err := gorillaConn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
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if err != nil {
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log.Println("write close:", err)
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return
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}
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// this must be called or set to be called with defer
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gorillaConn.Close()
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gorillaConn = nil
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}
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func gorillaDial(hostname string) {
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// var addr = flag.String("addr", "v000185.testing.com.customers.wprod.wit.com:9000", "http service address")
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for {
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// u := url.URL{Scheme: "ws", Host: *addr, Path: "/event"}
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u := url.URL{Scheme: "ws", Host: hostname, Path: "/event"}
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log.Printf("connecting to %s", u.String())
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conn, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
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if err != nil {
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log.Println("gorilla Dial failed", err)
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} else {
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gorillaConn = conn
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// handle inbound messages on the channel
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readGorillaConn(conn)
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closeGorillaConn()
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}
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time.Sleep(time.Second * 5) // try every 5 seconds
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}
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}
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//
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// this is a facinating code snippet that I wanted to leave here because it is
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// so interesting. Complements to the gorilla websocket example developers
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//
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func beautifulAndFacinatingChannel() {
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done := make(chan struct{})
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interrupt := make(chan os.Signal, 1)
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signal.Notify(interrupt, os.Interrupt)
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ticker := time.NewTicker(time.Second * 1)
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defer ticker.Stop()
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defer close(done)
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for {
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select {
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case <-done:
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return
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case t := <-ticker.C:
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log.Println("gorilla NewTicker()", t.String())
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case <-interrupt:
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log.Println("interrupt")
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gorillaSendProtobuf()
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// not sure what this does. nothing right?
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select {
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case <-done:
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case <-time.After(time.Second):
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}
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return
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}
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}
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}
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