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main
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c9c4800d68
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c9c4800d68 | ||
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d793e13361 |
@@ -1,4 +1,13 @@
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package main
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import (
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"net/http"
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"tts-room/src/server"
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)
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func main() {
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s := server.NewServer()
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if err := http.ListenAndServe(":10000", s); err != nil {
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panic(err)
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}
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}
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7
go.mod
7
go.mod
@@ -1,3 +1,8 @@
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module tts-room
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go 1.22.2
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go 1.24.0
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require (
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github.com/gorilla/websocket v1.5.3
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golang.org/x/time v0.14.0
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)
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4
go.sum
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4
go.sum
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@@ -0,0 +1,4 @@
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github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
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github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
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golang.org/x/time v0.14.0 h1:MRx4UaLrDotUKUdCIqzPC48t1Y9hANFKIRpNx+Te8PI=
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golang.org/x/time v0.14.0/go.mod h1:eL/Oa2bBBK0TkX57Fyni+NgnyQQN4LitPmob2Hjnqw4=
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77
src/public/index.html
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77
src/public/index.html
Normal file
@@ -0,0 +1,77 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<script>
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window.addEventListener("load", function(evt) {
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var output = document.getElementById("output");
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var input = document.getElementById("input");
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var ws;
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var print = function(message) {
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var d = document.createElement("div");
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d.textContent = message;
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output.appendChild(d);
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output.scroll(0, output.scrollHeight);
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};
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document.getElementById("open").onclick = function(evt) {
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if (ws) {
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return false;
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}
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ws = new WebSocket("ws://"+window.location.host+"/ws");
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ws.onopen = function(evt) {
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print("OPEN");
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}
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ws.onclose = function(evt) {
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print("CLOSE");
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ws = null;
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}
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ws.onmessage = function(evt) {
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print("RESPONSE: " + evt.data);
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}
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ws.onerror = function(evt) {
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print("ERROR: " + evt.data);
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}
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return false;
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};
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document.getElementById("send").onclick = function(evt) {
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if (!ws) {
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return false;
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}
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print("SEND: " + input.value);
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ws.send(input.value);
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return false;
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};
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document.getElementById("close").onclick = function(evt) {
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if (!ws) {
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return false;
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}
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ws.close();
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return false;
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};
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});
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</script>
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</head>
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<body>
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<table>
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<tr><td valign="top" width="50%">
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<p>Click "Open" to create a connection to the server,
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"Send" to send a message to the server and "Close" to close the connection.
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You can change the message and send multiple times.
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<p>
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<form>
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<button id="open">Open</button>
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<button id="close">Close</button>
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<p><input id="input" type="text" value="Hello world!">
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<button id="send">Send</button>
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</form>
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</td><td valign="top" width="50%">
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<div id="output" style="max-height: 70vh;overflow-y: scroll;"></div>
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</td></tr></table>
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</body>
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</html>
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33
src/server/server.go
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33
src/server/server.go
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@@ -0,0 +1,33 @@
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package server
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import (
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"log"
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"net/http"
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)
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type Server struct{}
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func NewServer() Server {
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return Server{}
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}
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func (s Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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switch r.URL.Path {
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case "/ws":
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if err := s.WS(w, r); err != nil {
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log.Println("[ws]", err)
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}
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default:
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http.FileServer(http.Dir("./src/public")).ServeHTTP(w, r)
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}
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}
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func (s Server) WS(w http.ResponseWriter, r *http.Request) error {
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sess, err := newSession(w, r)
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if err != nil {
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return err
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}
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defer sess.Close()
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return sess.Run()
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}
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81
src/server/session.go
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81
src/server/session.go
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@@ -0,0 +1,81 @@
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package server
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import (
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"context"
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"log"
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"net/http"
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"sync"
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"github.com/gorilla/websocket"
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"golang.org/x/time/rate"
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)
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type session struct {
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ctx context.Context
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can context.CancelFunc
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ws *websocket.Conn
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wg sync.WaitGroup
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}
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var upgrader = websocket.Upgrader{}
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func newSession(w http.ResponseWriter, r *http.Request) (*session, error) {
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c, err := upgrader.Upgrade(w, r, nil)
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ctx, can := context.WithCancel(r.Context())
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return &session{
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ctx: ctx,
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can: can,
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ws: c,
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}, err
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}
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func (s *session) Close() {
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if s.ws != nil {
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s.ws.Close()
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}
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s.ws = nil
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s.can()
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s.wg.Wait()
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}
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func (s *session) Run() error {
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defer s.Close()
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go s.gather()
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go s.scatter()
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<-s.ctx.Done()
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return s.ctx.Err()
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}
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func (s *session) gather() {
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s.while(func() error {
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mt, message, err := s.ws.ReadMessage()
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if err != nil {
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return err
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}
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log.Println(" read:", mt, message) // TODO
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return nil
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})
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}
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func (s *session) scatter() {
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s.while(func() error {
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return s.ws.WriteMessage(1, []byte("message")) // TODO
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})
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}
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func (s *session) while(foo func() error) {
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defer s.can()
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s.wg.Add(1)
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defer s.wg.Done()
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l := rate.NewLimiter(20, 1)
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for l.Wait(s.ctx) == nil {
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if err := foo(); err != nil {
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log.Println(err)
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return
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}
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}
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}
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