This repository has been archived by the owner on May 27, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 276
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
use heartbeat instead of websocket discover, including whatsinput
- Loading branch information
1 parent
57b16a8
commit 96a2ae7
Showing
6 changed files
with
351 additions
and
97 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| package pubsub | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "encoding/json" | ||
| "errors" | ||
| "io" | ||
| "log" | ||
| "net" | ||
| "net/http" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/gorilla/mux" | ||
| "github.com/gorilla/websocket" | ||
| ) | ||
|
|
||
| type PubSub struct { | ||
| messageC chan Message | ||
| subs map[chan interface{}]Message | ||
| mu sync.Mutex | ||
| } | ||
|
|
||
| type Message struct { | ||
| Topic string | ||
| Receiver string | ||
| Data interface{} | ||
| } | ||
|
|
||
| func New() *PubSub { | ||
| return &PubSub{ | ||
| messageC: make(chan Message, 10), | ||
| } | ||
| } | ||
|
|
||
| func (ps *PubSub) drain() { | ||
| for message := range ps.messageC { | ||
| ps.mu.Lock() | ||
| for ch, m := range ps.subs { | ||
| if m.Topic == message.Topic && m.Receiver == message.Receiver { | ||
| select { | ||
| case ch <- message.Data: | ||
| case <-time.After(1 * time.Second): | ||
| log.Println("Sub-chan receive timeout 1s, deleted") | ||
| delete(ps.subs, ch) | ||
| } | ||
| } | ||
| } | ||
| ps.mu.Unlock() | ||
| } | ||
| } | ||
|
|
||
| func (ps *PubSub) Publish(data interface{}, topic string, receiver string) { | ||
| ps.messageC <- Message{ | ||
| Topic: topic, | ||
| Receiver: receiver, | ||
| Data: data, | ||
| } | ||
| } | ||
|
|
||
| func (ps *PubSub) Subscribe(topic string, receiver string) chan interface{} { | ||
| ps.mu.Lock() | ||
| defer ps.mu.Unlock() | ||
| C := make(chan interface{}) | ||
| ps.subs[C] = Message{ | ||
| Topic: topic, | ||
| Receiver: receiver, | ||
| } | ||
| return C | ||
| } | ||
|
|
||
| func (ps *PubSub) Unsubscribe(ch chan interface{}) { | ||
| ps.mu.Lock() | ||
| defer ps.mu.Unlock() | ||
| delete(ps.subs, ch) | ||
| } | ||
|
|
||
| type HTTPPubSub struct { | ||
| ps *PubSub | ||
| r *mux.Router | ||
| } | ||
|
|
||
| func NewHTTPPubSub(ps *PubSub) *HTTPPubSub { | ||
| r := mux.NewRouter() | ||
| upgrader := websocket.Upgrader{ | ||
| ReadBufferSize: 1024, | ||
| WriteBufferSize: 1024, | ||
| CheckOrigin: func(r *http.Request) bool { | ||
| return true | ||
| }, | ||
| } | ||
|
|
||
| // publish | ||
| r.HandleFunc("/{topic}/{receiver}", func(w http.ResponseWriter, r *http.Request) { | ||
| topic := mux.Vars(r)["topic"] | ||
| receiver := mux.Vars(r)["receiver"] | ||
| var data interface{} | ||
| json.NewDecoder(r.Body).Decode(&data) | ||
| ps.Publish(data, topic, receiver) | ||
| }).Methods("POST") | ||
|
|
||
| // subscribe WebSocket | ||
| r.HandleFunc("/{topic}/{receiver}", func(w http.ResponseWriter, r *http.Request) { | ||
| topic := mux.Vars(r)["topic"] | ||
| receiver := mux.Vars(r)["receiver"] | ||
| ws, err := upgrader.Upgrade(w, r, nil) | ||
| if err != nil { | ||
| log.Println(err) | ||
| return | ||
| } | ||
| dataC := ps.Subscribe(topic, receiver) | ||
| defer ps.Unsubscribe(dataC) | ||
| quitC := make(chan bool, 1) | ||
| go func() { | ||
| for { | ||
| select { | ||
| case <-quitC: | ||
| return | ||
| case data := <-dataC: | ||
| ws.WriteJSON(data) | ||
| } | ||
| } | ||
| }() | ||
| for { | ||
| _, _, err := ws.ReadMessage() | ||
| if err != nil { | ||
| quitC <- true | ||
| break | ||
| } | ||
| } | ||
| }).Methods("GET") | ||
|
|
||
| // subscribe hijack | ||
| r.HandleFunc("/{topic}/{receiver}", func(w http.ResponseWriter, r *http.Request) { | ||
| topic := mux.Vars(r)["topic"] | ||
| receiver := mux.Vars(r)["receiver"] | ||
| conn, err := hijackHTTPRequest(w) | ||
| if err != nil { | ||
| http.Error(w, err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| dataC := ps.Subscribe(topic, receiver) | ||
| defer ps.Unsubscribe(dataC) | ||
| for data := range dataC { | ||
| jsdata, _ := json.Marshal(data) | ||
| if _, err := io.WriteString(conn, string(jsdata)+"\n"); err != nil { | ||
| break | ||
| } | ||
| } | ||
| }).Methods("CONNECT") | ||
|
|
||
| return &HTTPPubSub{ | ||
| ps: ps, | ||
| r: r, | ||
| } | ||
| } | ||
|
|
||
| func (h *HTTPPubSub) ServeHTTP(w http.ResponseWriter, r *http.Request) { | ||
| h.r.ServeHTTP(w, r) | ||
| } | ||
|
|
||
| func hijackHTTPRequest(w http.ResponseWriter) (conn net.Conn, err error) { | ||
| hj, ok := w.(http.Hijacker) | ||
| if !ok { | ||
| err = errors.New("webserver don't support hijacking") | ||
| return | ||
| } | ||
|
|
||
| hjconn, bufrw, err := hj.Hijack() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| conn = newHijackReadWriteCloser(hjconn.(*net.TCPConn), bufrw) | ||
| return | ||
| } | ||
|
|
||
| type hijackRW struct { | ||
| *net.TCPConn | ||
| bufrw *bufio.ReadWriter | ||
| } | ||
|
|
||
| func (this *hijackRW) Write(data []byte) (int, error) { | ||
| nn, err := this.bufrw.Write(data) | ||
| this.bufrw.Flush() | ||
| return nn, err | ||
| } | ||
|
|
||
| func (this *hijackRW) Read(p []byte) (int, error) { | ||
| return this.bufrw.Read(p) | ||
| } | ||
|
|
||
| func newHijackReadWriteCloser(conn *net.TCPConn, bufrw *bufio.ReadWriter) net.Conn { | ||
| return &hijackRW{ | ||
| bufrw: bufrw, | ||
| TCPConn: conn, | ||
| } | ||
| } |
Oops, something went wrong.