diff options
Diffstat (limited to 'vendor/gopkg.in')
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/.gitignore | 5 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/.travis.yml | 10 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/CHANGELOG.md | 44 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/LICENSE | 22 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/README.md | 185 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/config.go | 22 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/doc.go | 22 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/envelope.go | 7 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/hub.go | 80 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/melody.go | 313 | ||||
| -rw-r--r-- | vendor/gopkg.in/olahol/melody.v1/session.go | 219 |
11 files changed, 929 insertions, 0 deletions
diff --git a/vendor/gopkg.in/olahol/melody.v1/.gitignore b/vendor/gopkg.in/olahol/melody.v1/.gitignore new file mode 100644 index 00000000..31ea56b1 --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/.gitignore @@ -0,0 +1,5 @@ +.DS_Store +benchmark +*.swp +coverage.out +Makefile diff --git a/vendor/gopkg.in/olahol/melody.v1/.travis.yml b/vendor/gopkg.in/olahol/melody.v1/.travis.yml new file mode 100644 index 00000000..f1a141cd --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/.travis.yml @@ -0,0 +1,10 @@ +language: go +sudo: required +go: +- 1.6 +- 1.7 +- 1.8 +install: + - go get github.com/gorilla/websocket +script: + - go test diff --git a/vendor/gopkg.in/olahol/melody.v1/CHANGELOG.md b/vendor/gopkg.in/olahol/melody.v1/CHANGELOG.md new file mode 100644 index 00000000..ff511ddd --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/CHANGELOG.md @@ -0,0 +1,44 @@ +## 2017-05-18 + +* Fix `HandleSentMessageBinary`. + +## 2017-04-11 + +* Allow any origin by default. +* Add `BroadcastMultiple`. + +## 2017-04-09 + +* Add control message support. +* Add `IsClosed` to Session. + +## 2017-02-10 + +* Return errors for some exposed methods. +* Add `HandleRequestWithKeys`. +* Add `HandleSentMessage` and `HandleSentMessageBinary`. + +## 2017-01-20 + +* Add `Len()` to fetch number of connected sessions. + +## 2016-12-09 + +* Add metadata management for sessions. + +## 2016-05-09 + +* Add method `HandlePong` to melody instance. + +## 2015-10-07 + +* Add broadcast methods for binary messages. + +## 2015-09-03 + +* Add `Close` method to melody instance. + +### 2015-06-10 + +* Support for binary messages. +* BroadcastOthers method. diff --git a/vendor/gopkg.in/olahol/melody.v1/LICENSE b/vendor/gopkg.in/olahol/melody.v1/LICENSE new file mode 100644 index 00000000..4ae857e8 --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/LICENSE @@ -0,0 +1,22 @@ +Copyright (c) 2015 Ola Holmström. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + + Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/gopkg.in/olahol/melody.v1/README.md b/vendor/gopkg.in/olahol/melody.v1/README.md new file mode 100644 index 00000000..67e3ab50 --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/README.md @@ -0,0 +1,185 @@ +# melody + +[](https://travis-ci.org/olahol/melody) +[](https://coveralls.io/r/olahol/melody) +[](https://godoc.org/github.com/olahol/melody) + +> :notes: Minimalist websocket framework for Go. + +Melody is websocket framework based on [github.com/gorilla/websocket](https://github.com/gorilla/websocket) +that abstracts away the tedious parts of handling websockets. It gets out of +your way so you can write real-time apps. Features include: + +* [x] Clear and easy interface similar to `net/http` or Gin. +* [x] A simple way to broadcast to all or selected connected sessions. +* [x] Message buffers making concurrent writing safe. +* [x] Automatic handling of ping/pong and session timeouts. +* [x] Store data on sessions. + +## Install + +```bash +go get gopkg.in/olahol/melody.v1 +``` + +## [Example: chat](https://github.com/olahol/melody/tree/master/examples/chat) + +[](https://github.com/olahol/melody/tree/master/examples/chat) + +Using [Gin](https://github.com/gin-gonic/gin): +```go +package main + +import ( + "github.com/gin-gonic/gin" + "gopkg.in/olahol/melody.v1" + "net/http" +) + +func main() { + r := gin.Default() + m := melody.New() + + r.GET("/", func(c *gin.Context) { + http.ServeFile(c.Writer, c.Request, "index.html") + }) + + r.GET("/ws", func(c *gin.Context) { + m.HandleRequest(c.Writer, c.Request) + }) + + m.HandleMessage(func(s *melody.Session, msg []byte) { + m.Broadcast(msg) + }) + + r.Run(":5000") +} +``` + +Using [Echo](https://github.com/labstack/echo): +```go +package main + +import ( + "github.com/labstack/echo" + "github.com/labstack/echo/engine/standard" + "github.com/labstack/echo/middleware" + "gopkg.in/olahol/melody.v1" + "net/http" +) + +func main() { + e := echo.New() + m := melody.New() + + e.Use(middleware.Logger()) + e.Use(middleware.Recover()) + + e.GET("/", func(c echo.Context) error { + http.ServeFile(c.Response().(*standard.Response).ResponseWriter, c.Request().(*standard.Request).Request, "index.html") + return nil + }) + + e.GET("/ws", func(c echo.Context) error { + m.HandleRequest(c.Response().(*standard.Response).ResponseWriter, c.Request().(*standard.Request).Request) + return nil + }) + + m.HandleMessage(func(s *melody.Session, msg []byte) { + m.Broadcast(msg) + }) + + e.Run(standard.New(":5000")) +} +``` + +## [Example: gophers](https://github.com/olahol/melody/tree/master/examples/gophers) + +[](https://github.com/olahol/melody/tree/master/examples/gophers) + +```go +package main + +import ( + "github.com/gin-gonic/gin" + "gopkg.in/olahol/melody.v1" + "net/http" + "strconv" + "strings" + "sync" +) + +type GopherInfo struct { + ID, X, Y string +} + +func main() { + router := gin.Default() + mrouter := melody.New() + gophers := make(map[*melody.Session]*GopherInfo) + lock := new(sync.Mutex) + counter := 0 + + router.GET("/", func(c *gin.Context) { + http.ServeFile(c.Writer, c.Request, "index.html") + }) + + router.GET("/ws", func(c *gin.Context) { + mrouter.HandleRequest(c.Writer, c.Request) + }) + + mrouter.HandleConnect(func(s *melody.Session) { + lock.Lock() + for _, info := range gophers { + s.Write([]byte("set " + info.ID + " " + info.X + " " + info.Y)) + } + gophers[s] = &GopherInfo{strconv.Itoa(counter), "0", "0"} + s.Write([]byte("iam " + gophers[s].ID)) + counter += 1 + lock.Unlock() + }) + + mrouter.HandleDisconnect(func(s *melody.Session) { + lock.Lock() + mrouter.BroadcastOthers([]byte("dis "+gophers[s].ID), s) + delete(gophers, s) + lock.Unlock() + }) + + mrouter.HandleMessage(func(s *melody.Session, msg []byte) { + p := strings.Split(string(msg), " ") + lock.Lock() + info := gophers[s] + if len(p) == 2 { + info.X = p[0] + info.Y = p[1] + mrouter.BroadcastOthers([]byte("set "+info.ID+" "+info.X+" "+info.Y), s) + } + lock.Unlock() + }) + + router.Run(":5000") +} +``` + +### [More examples](https://github.com/olahol/melody/tree/master/examples) + +## [Documentation](https://godoc.org/github.com/olahol/melody) + +## Contributors + +* Ola Holmström (@olahol) +* Shogo Iwano (@shiwano) +* Matt Caldwell (@mattcaldwell) +* Heikki Uljas (@huljas) +* Robbie Trencheny (@robbiet480) +* yangjinecho (@yangjinecho) + +## FAQ + +If you are getting a `403` when trying to connect to your websocket you can [change allow all origin hosts](http://godoc.org/github.com/gorilla/websocket#hdr-Origin_Considerations): + +```go +m := melody.New() +m.Upgrader.CheckOrigin = func(r *http.Request) bool { return true } +``` diff --git a/vendor/gopkg.in/olahol/melody.v1/config.go b/vendor/gopkg.in/olahol/melody.v1/config.go new file mode 100644 index 00000000..81ebd057 --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/config.go @@ -0,0 +1,22 @@ +package melody + +import "time" + +// Config melody configuration struct. +type Config struct { + WriteWait time.Duration // Milliseconds until write times out. + PongWait time.Duration // Timeout for waiting on pong. + PingPeriod time.Duration // Milliseconds between pings. + MaxMessageSize int64 // Maximum size in bytes of a message. + MessageBufferSize int // The max amount of messages that can be in a sessions buffer before it starts dropping them. +} + +func newConfig() *Config { + return &Config{ + WriteWait: 10 * time.Second, + PongWait: 60 * time.Second, + PingPeriod: (60 * time.Second * 9) / 10, + MaxMessageSize: 512, + MessageBufferSize: 256, + } +} diff --git a/vendor/gopkg.in/olahol/melody.v1/doc.go b/vendor/gopkg.in/olahol/melody.v1/doc.go new file mode 100644 index 00000000..a65aa634 --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/doc.go @@ -0,0 +1,22 @@ +// Copyright 2015 Ola Holmström. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package melody implements a framework for dealing with WebSockets. +// +// Example +// +// A broadcasting echo server: +// +// func main() { +// r := gin.Default() +// m := melody.New() +// r.GET("/ws", func(c *gin.Context) { +// m.HandleRequest(c.Writer, c.Request) +// }) +// m.HandleMessage(func(s *melody.Session, msg []byte) { +// m.Broadcast(msg) +// }) +// r.Run(":5000") +// } +package melody diff --git a/vendor/gopkg.in/olahol/melody.v1/envelope.go b/vendor/gopkg.in/olahol/melody.v1/envelope.go new file mode 100644 index 00000000..baa55a3a --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/envelope.go @@ -0,0 +1,7 @@ +package melody + +type envelope struct { + t int + msg []byte + filter filterFunc +} diff --git a/vendor/gopkg.in/olahol/melody.v1/hub.go b/vendor/gopkg.in/olahol/melody.v1/hub.go new file mode 100644 index 00000000..edc6337d --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/hub.go @@ -0,0 +1,80 @@ +package melody + +import ( + "sync" +) + +type hub struct { + sessions map[*Session]bool + broadcast chan *envelope + register chan *Session + unregister chan *Session + exit chan *envelope + open bool + rwmutex *sync.RWMutex +} + +func newHub() *hub { + return &hub{ + sessions: make(map[*Session]bool), + broadcast: make(chan *envelope), + register: make(chan *Session), + unregister: make(chan *Session), + exit: make(chan *envelope), + open: true, + rwmutex: &sync.RWMutex{}, + } +} + +func (h *hub) run() { +loop: + for { + select { + case s := <-h.register: + h.rwmutex.Lock() + h.sessions[s] = true + h.rwmutex.Unlock() + case s := <-h.unregister: + if _, ok := h.sessions[s]; ok { + h.rwmutex.Lock() + delete(h.sessions, s) + h.rwmutex.Unlock() + } + case m := <-h.broadcast: + h.rwmutex.RLock() + for s := range h.sessions { + if m.filter != nil { + if m.filter(s) { + s.writeMessage(m) + } + } else { + s.writeMessage(m) + } + } + h.rwmutex.RUnlock() + case m := <-h.exit: + h.rwmutex.Lock() + for s := range h.sessions { + s.writeMessage(m) + delete(h.sessions, s) + s.Close() + } + h.open = false + h.rwmutex.Unlock() + break loop + } + } +} + +func (h *hub) closed() bool { + h.rwmutex.RLock() + defer h.rwmutex.RUnlock() + return !h.open +} + +func (h *hub) len() int { + h.rwmutex.RLock() + defer h.rwmutex.RUnlock() + + return len(h.sessions) +} diff --git a/vendor/gopkg.in/olahol/melody.v1/melody.go b/vendor/gopkg.in/olahol/melody.v1/melody.go new file mode 100644 index 00000000..6e416b15 --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/melody.go @@ -0,0 +1,313 @@ +package melody + +import ( + "errors" + "net/http" + "sync" + + "github.com/gorilla/websocket" +) + +// Close codes defined in RFC 6455, section 11.7. +// Duplicate of codes from gorilla/websocket for convenience. +const ( + CloseNormalClosure = 1000 + CloseGoingAway = 1001 + CloseProtocolError = 1002 + CloseUnsupportedData = 1003 + CloseNoStatusReceived = 1005 + CloseAbnormalClosure = 1006 + CloseInvalidFramePayloadData = 1007 + ClosePolicyViolation = 1008 + CloseMessageTooBig = 1009 + CloseMandatoryExtension = 1010 + CloseInternalServerErr = 1011 + CloseServiceRestart = 1012 + CloseTryAgainLater = 1013 + CloseTLSHandshake = 1015 +) + +// Duplicate of codes from gorilla/websocket for convenience. +var validReceivedCloseCodes = map[int]bool{ + // see http://www.iana.org/assignments/websocket/websocket.xhtml#close-code-number + + CloseNormalClosure: true, + CloseGoingAway: true, + CloseProtocolError: true, + CloseUnsupportedData: true, + CloseNoStatusReceived: false, + CloseAbnormalClosure: false, + CloseInvalidFramePayloadData: true, + ClosePolicyViolation: true, + CloseMessageTooBig: true, + CloseMandatoryExtension: true, + CloseInternalServerErr: true, + CloseServiceRestart: true, + CloseTryAgainLater: true, + CloseTLSHandshake: false, +} + +type handleMessageFunc func(*Session, []byte) +type handleErrorFunc func(*Session, error) +type handleCloseFunc func(*Session, int, string) error +type handleSessionFunc func(*Session) +type filterFunc func(*Session) bool + +// Melody implements a websocket manager. +type Melody struct { + Config *Config + Upgrader *websocket.Upgrader + messageHandler handleMessageFunc + messageHandlerBinary handleMessageFunc + messageSentHandler handleMessageFunc + messageSentHandlerBinary handleMessageFunc + errorHandler handleErrorFunc + closeHandler handleCloseFunc + connectHandler handleSessionFunc + disconnectHandler handleSessionFunc + pongHandler handleSessionFunc + hub *hub +} + +// New creates a new melody instance with default Upgrader and Config. +func New() *Melody { + upgrader := &websocket.Upgrader{ + ReadBufferSize: 1024, + WriteBufferSize: 1024, + CheckOrigin: func(r *http.Request) bool { return true }, + } + + hub := newHub() + + go hub.run() + + return &Melody{ + Config: newConfig(), + Upgrader: upgrader, + messageHandler: func(*Session, []byte) {}, + messageHandlerBinary: func(*Session, []byte) {}, + messageSentHandler: func(*Session, []byte) {}, + messageSentHandlerBinary: func(*Session, []byte) {}, + errorHandler: func(*Session, error) {}, + closeHandler: nil, + connectHandler: func(*Session) {}, + disconnectHandler: func(*Session) {}, + pongHandler: func(*Session) {}, + hub: hub, + } +} + +// HandleConnect fires fn when a session connects. +func (m *Melody) HandleConnect(fn func(*Session)) { + m.connectHandler = fn +} + +// HandleDisconnect fires fn when a session disconnects. +func (m *Melody) HandleDisconnect(fn func(*Session)) { + m.disconnectHandler = fn +} + +// HandlePong fires fn when a pong is received from a session. +func (m *Melody) HandlePong(fn func(*Session)) { + m.pongHandler = fn +} + +// HandleMessage fires fn when a text message comes in. +func (m *Melody) HandleMessage(fn func(*Session, []byte)) { + m.messageHandler = fn +} + +// HandleMessageBinary fires fn when a binary message comes in. +func (m *Melody) HandleMessageBinary(fn func(*Session, []byte)) { + m.messageHandlerBinary = fn +} + +// HandleSentMessage fires fn when a text message is successfully sent. +func (m *Melody) HandleSentMessage(fn func(*Session, []byte)) { + m.messageSentHandler = fn +} + +// HandleSentMessageBinary fires fn when a binary message is successfully sent. +func (m *Melody) HandleSentMessageBinary(fn func(*Session, []byte)) { + m.messageSentHandlerBinary = fn +} + +// HandleError fires fn when a session has an error. +func (m *Melody) HandleError(fn func(*Session, error)) { + m.errorHandler = fn +} + +// HandleClose sets the handler for close messages received from the session. +// The code argument to h is the received close code or CloseNoStatusReceived +// if the close message is empty. The default close handler sends a close frame +// back to the session. +// +// The application must read the connection to process close messages as +// described in the section on Control Frames above. +// +// The connection read methods return a CloseError when a close frame is +// received. Most applications should handle close messages as part of their +// normal error handling. Applications should only set a close handler when the +// application must perform some action before sending a close frame back to +// the session. +func (m *Melody) HandleClose(fn func(*Session, int, string) error) { + if fn != nil { + m.closeHandler = fn + } +} + +// HandleRequest upgrades http requests to websocket connections and dispatches them to be handled by the melody instance. +func (m *Melody) HandleRequest(w http.ResponseWriter, r *http.Request) error { + return m.HandleRequestWithKeys(w, r, nil) +} + +// HandleRequestWithKeys does the same as HandleRequest but populates session.Keys with keys. +func (m *Melody) HandleRequestWithKeys(w http.ResponseWriter, r *http.Request, keys map[string]interface{}) error { + if m.hub.closed() { + return errors.New("melody instance is closed") + } + + conn, err := m.Upgrader.Upgrade(w, r, nil) + + if err != nil { + return err + } + + session := &Session{ + Request: r, + Keys: keys, + conn: conn, + output: make(chan *envelope, m.Config.MessageBufferSize), + melody: m, + open: true, + rwmutex: &sync.RWMutex{}, + } + + m.hub.register <- session + + m.connectHandler(session) + + go session.writePump() + + session.readPump() + + if !m.hub.closed() { + m.hub.unregister <- session + } + + session.close() + + m.disconnectHandler(session) + + return nil +} + +// Broadcast broadcasts a text message to all sessions. +func (m *Melody) Broadcast(msg []byte) error { + if m.hub.closed() { + return errors.New("melody instance is closed") + } + + message := &envelope{t: websocket.TextMessage, msg: msg} + m.hub.broadcast <- message + + return nil +} + +// BroadcastFilter broadcasts a text message to all sessions that fn returns true for. +func (m *Melody) BroadcastFilter(msg []byte, fn func(*Session) bool) error { + if m.hub.closed() { + return errors.New("melody instance is closed") + } + + message := &envelope{t: websocket.TextMessage, msg: msg, filter: fn} + m.hub.broadcast <- message + + return nil +} + +// BroadcastOthers broadcasts a text message to all sessions except session s. +func (m *Melody) BroadcastOthers(msg []byte, s *Session) error { + return m.BroadcastFilter(msg, func(q *Session) bool { + return s != q + }) +} + +// BroadcastMultiple broadcasts a text message to multiple sessions given in the sessions slice. +func (m *Melody) BroadcastMultiple(msg []byte, sessions []*Session) error { + for _, sess := range sessions { + if writeErr := sess.Write(msg); writeErr != nil { + return writeErr + } + } + return nil +} + +// BroadcastBinary broadcasts a binary message to all sessions. +func (m *Melody) BroadcastBinary(msg []byte) error { + if m.hub.closed() { + return errors.New("melody instance is closed") + } + + message := &envelope{t: websocket.BinaryMessage, msg: msg} + m.hub.broadcast <- message + + return nil +} + +// BroadcastBinaryFilter broadcasts a binary message to all sessions that fn returns true for. +func (m *Melody) BroadcastBinaryFilter(msg []byte, fn func(*Session) bool) error { + if m.hub.closed() { + return errors.New("melody instance is closed") + } + + message := &envelope{t: websocket.BinaryMessage, msg: msg, filter: fn} + m.hub.broadcast <- message + + return nil +} + +// BroadcastBinaryOthers broadcasts a binary message to all sessions except session s. +func (m *Melody) BroadcastBinaryOthers(msg []byte, s *Session) error { + return m.BroadcastBinaryFilter(msg, func(q *Session) bool { + return s != q + }) +} + +// Close closes the melody instance and all connected sessions. +func (m *Melody) Close() error { + if m.hub.closed() { + return errors.New("melody instance is already closed") + } + + m.hub.exit <- &envelope{t: websocket.CloseMessage, msg: []byte{}} + + return nil +} + +// CloseWithMsg closes the melody instance with the given close payload and all connected sessions. +// Use the FormatCloseMessage function to format a proper close message payload. +func (m *Melody) CloseWithMsg(msg []byte) error { + if m.hub.closed() { + return errors.New("melody instance is already closed") + } + + m.hub.exit <- &envelope{t: websocket.CloseMessage, msg: msg} + + return nil +} + +// Len return the number of connected sessions. +func (m *Melody) Len() int { + return m.hub.len() +} + +// IsClosed returns the status of the melody instance. +func (m *Melody) IsClosed() bool { + return m.hub.closed() +} + +// FormatCloseMessage formats closeCode and text as a WebSocket close message. +func FormatCloseMessage(closeCode int, text string) []byte { + return websocket.FormatCloseMessage(closeCode, text) +} diff --git a/vendor/gopkg.in/olahol/melody.v1/session.go b/vendor/gopkg.in/olahol/melody.v1/session.go new file mode 100644 index 00000000..3997cefe --- /dev/null +++ b/vendor/gopkg.in/olahol/melody.v1/session.go @@ -0,0 +1,219 @@ +package melody + +import ( + "errors" + "net/http" + "sync" + "time" + + "github.com/gorilla/websocket" +) + +// Session wrapper around websocket connections. +type Session struct { + Request *http.Request + Keys map[string]interface{} + conn *websocket.Conn + output chan *envelope + melody *Melody + open bool + rwmutex *sync.RWMutex +} + +func (s *Session) writeMessage(message *envelope) { + if s.closed() { + s.melody.errorHandler(s, errors.New("tried to write to closed a session")) + return + } + + select { + case s.output <- message: + default: + s.melody.errorHandler(s, errors.New("session message buffer is full")) + } +} + +func (s *Session) writeRaw(message *envelope) error { + if s.closed() { + return errors.New("tried to write to a closed session") + } + + s.conn.SetWriteDeadline(time.Now().Add(s.melody.Config.WriteWait)) + err := s.conn.WriteMessage(message.t, message.msg) + + if err != nil { + return err + } + + return nil +} + +func (s *Session) closed() bool { + s.rwmutex.RLock() + defer s.rwmutex.RUnlock() + + return !s.open +} + +func (s *Session) close() { + if !s.closed() { + s.rwmutex.Lock() + s.open = false + s.conn.Close() + close(s.output) + s.rwmutex.Unlock() + } +} + +func (s *Session) ping() { + s.writeRaw(&envelope{t: websocket.PingMessage, msg: []byte{}}) +} + +func (s *Session) writePump() { + ticker := time.NewTicker(s.melody.Config.PingPeriod) + defer ticker.Stop() + +loop: + for { + select { + case msg, ok := <-s.output: + if !ok { + break loop + } + + err := s.writeRaw(msg) + + if err != nil { + s.melody.errorHandler(s, err) + break loop + } + + if msg.t == websocket.CloseMessage { + break loop + } + + if msg.t == websocket.TextMessage { + s.melody.messageSentHandler(s, msg.msg) + } + + if msg.t == websocket.BinaryMessage { + s.melody.messageSentHandlerBinary(s, msg.msg) + } + case <-ticker.C: + s.ping() + } + } +} + +func (s *Session) readPump() { + s.conn.SetReadLimit(s.melody.Config.MaxMessageSize) + s.conn.SetReadDeadline(time.Now().Add(s.melody.Config.PongWait)) + + s.conn.SetPongHandler(func(string) error { + s.conn.SetReadDeadline(time.Now().Add(s.melody.Config.PongWait)) + s.melody.pongHandler(s) + return nil + }) + + if s.melody.closeHandler != nil { + s.conn.SetCloseHandler(func(code int, text string) error { + return s.melody.closeHandler(s, code, text) + }) + } + + for { + t, message, err := s.conn.ReadMessage() + + if err != nil { + s.melody.errorHandler(s, err) + break + } + + if t == websocket.TextMessage { + s.melody.messageHandler(s, message) + } + + if t == websocket.BinaryMessage { + s.melody.messageHandlerBinary(s, message) + } + } +} + +// Write writes message to session. +func (s *Session) Write(msg []byte) error { + if s.closed() { + return errors.New("session is closed") + } + + s.writeMessage(&envelope{t: websocket.TextMessage, msg: msg}) + + return nil +} + +// WriteBinary writes a binary message to session. +func (s *Session) WriteBinary(msg []byte) error { + if s.closed() { + return errors.New("session is closed") + } + + s.writeMessage(&envelope{t: websocket.BinaryMessage, msg: msg}) + + return nil +} + +// Close closes session. +func (s *Session) Close() error { + if s.closed() { + return errors.New("session is already closed") + } + + s.writeMessage(&envelope{t: websocket.CloseMessage, msg: []byte{}}) + + return nil +} + +// CloseWithMsg closes the session with the provided payload. +// Use the FormatCloseMessage function to format a proper close message payload. +func (s *Session) CloseWithMsg(msg []byte) error { + if s.closed() { + return errors.New("session is already closed") + } + + s.writeMessage(&envelope{t: websocket.CloseMessage, msg: msg}) + + return nil +} + +// Set is used to store a new key/value pair exclusivelly for this session. +// It also lazy initializes s.Keys if it was not used previously. +func (s *Session) Set(key string, value interface{}) { + if s.Keys == nil { + s.Keys = make(map[string]interface{}) + } + + s.Keys[key] = value +} + +// Get returns the value for the given key, ie: (value, true). +// If the value does not exists it returns (nil, false) +func (s *Session) Get(key string) (value interface{}, exists bool) { + if s.Keys != nil { + value, exists = s.Keys[key] + } + + return +} + +// MustGet returns the value for the given key if it exists, otherwise it panics. +func (s *Session) MustGet(key string) interface{} { + if value, exists := s.Get(key); exists { + return value + } + + panic("Key \"" + key + "\" does not exist") +} + +// IsClosed returns the status of the connection. +func (s *Session) IsClosed() bool { + return s.closed() +} |