mirror of
https://github.com/42wim/matterbridge.git
synced 2024-12-18 06:52:01 -08:00
314 lines
9.0 KiB
Go
314 lines
9.0 KiB
Go
|
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)
|
||
|
}
|