/
handler.go
367 lines (331 loc) · 8.44 KB
/
handler.go
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package socketio
import (
"fmt"
"reflect"
"sync"
"github.com/pschlump/godebug"
logrus "github.com/pschlump/pslog" // "github.com/sirupsen/logrus"
)
// PJS - could have it return more than just an error, if "rmsg" and "rbody" - then emit response?
// that makes it more like a RPC - call a func get back a response
type EventHandlerFunc func(so *Socket, message string, args [][]byte) error
type baseHandler struct {
events map[string]*caller
allEvents []*caller
x_events map[string]EventHandlerFunc
x_allEvents []EventHandlerFunc
name string
broadcast BroadcastAdaptor
lock sync.RWMutex
}
func newBaseHandler(name string, broadcast BroadcastAdaptor) *baseHandler {
// fmt.Printf("*********************************************************************** this one *********************************************************************\n")
return &baseHandler{
events: make(map[string]*caller),
allEvents: make([]*caller, 0, 5),
name: name,
broadcast: broadcast,
}
}
// On registers the function f to handle message.
func (h *baseHandler) On(message string, f interface{}) error {
c, err := newCaller(f)
if err != nil {
return err
}
h.lock.Lock()
h.events[message] = c
h.lock.Unlock()
return nil
}
func (h *baseHandler) Handle(message string, f EventHandlerFunc) error {
h.lock.Lock()
h.x_events[message] = f
h.lock.Unlock()
return nil
}
func (h *baseHandler) HandleAny(f EventHandlerFunc) error {
h.lock.Lock()
h.x_allEvents = append(h.x_allEvents, f)
h.lock.Unlock()
return nil
}
// On registers the function f to handle ANY message.
func (h *baseHandler) OnAny(f interface{}) error {
c, err := newCaller(f)
if err != nil {
return err
}
h.lock.Lock()
h.allEvents = append(h.allEvents, c)
h.lock.Unlock()
return nil
}
func (h *baseHandler) PrintEventsRespondedTo() {
fmt.Printf("\tEvents:[")
com := ""
for i := range h.events {
fmt.Printf("%s%s", com, i)
com = ", "
}
fmt.Printf(" ] AllEvents = %d", len(h.allEvents))
fmt.Printf("\n")
}
type socketHandler struct {
*baseHandler
acks map[int]*caller
socket *socket
rooms map[string]struct{}
}
func newSocketHandler(s *socket, base *baseHandler) *socketHandler {
events := make(map[string]*caller)
allEvents := make([]*caller, 0, 5)
x_events := make(map[string]EventHandlerFunc)
x_allEvents := make([]EventHandlerFunc, 0, 5)
base.lock.Lock()
for k, v := range base.events {
events[k] = v
}
base.lock.Unlock()
return &socketHandler{
baseHandler: &baseHandler{
events: events,
allEvents: allEvents,
x_events: x_events,
x_allEvents: x_allEvents,
broadcast: base.broadcast,
},
acks: make(map[int]*caller),
socket: s,
rooms: make(map[string]struct{}),
}
}
func (h *socketHandler) Emit(message string, args ...interface{}) error {
var c *caller
if l := len(args); l > 0 {
fv := reflect.ValueOf(args[l-1])
if fv.Kind() == reflect.Func {
var err error
c, err = newCaller(args[l-1])
if err != nil {
return err
}
args = args[:l-1]
}
}
args = append([]interface{}{message}, args...)
h.lock.Lock()
defer h.lock.Unlock()
if c != nil {
id, err := h.socket.sendId(args)
if err != nil {
return err
}
h.acks[id] = c
return nil
}
return h.socket.send(args)
}
func (h *socketHandler) Rooms() []string {
h.lock.RLock()
defer h.lock.RUnlock()
ret := make([]string, len(h.rooms))
i := 0
for room := range h.rooms {
ret[i] = room
i++
}
return ret
}
func (h *socketHandler) Join(room string) error {
if err := h.baseHandler.broadcast.Join(h.broadcastName(room), h.socket); err != nil {
return err
}
h.lock.Lock()
h.rooms[room] = struct{}{}
h.lock.Unlock()
return nil
}
func (h *socketHandler) Leave(room string) error {
if err := h.baseHandler.broadcast.Leave(h.broadcastName(room), h.socket); err != nil {
return err
}
h.lock.Lock()
delete(h.rooms, room)
h.lock.Unlock()
return nil
}
func (h *socketHandler) LeaveAll() error {
h.lock.RLock()
tmp := h.rooms
h.lock.RUnlock()
for room := range tmp {
if err := h.baseHandler.broadcast.Leave(h.broadcastName(room), h.socket); err != nil {
return err
}
}
return nil
}
func (h *baseHandler) BroadcastTo(room, message string, args ...interface{}) error {
return h.broadcast.Send(nil, h.broadcastName(room), message, args...)
}
func (h *socketHandler) BroadcastTo(room, message string, args ...interface{}) error {
return h.baseHandler.broadcast.Send(h.socket, h.broadcastName(room), message, args...)
}
func (h *baseHandler) broadcastName(room string) string {
return fmt.Sprintf("%s:%s", h.name, room)
}
func (h *socketHandler) onPacket(decoder *decoder, packet *packet) ([]interface{}, error) {
if Db1 {
fmt.Printf("At:%s\n", godebug.LF())
}
var message string
switch packet.Type {
case _CONNECT:
message = "connection"
case _DISCONNECT:
message = "disconnect"
case _ERROR:
message = "error"
case _ACK:
case _BINARY_ACK:
return nil, h.onAck(packet.Id, decoder, packet)
default:
message = decoder.Message()
}
if Db1 {
fmt.Printf("At:%s\n", godebug.LF())
}
h.PrintEventsRespondedTo()
if DbLogMessage {
fmt.Printf("Message [%s] ", message)
if Db1 {
fmt.Printf("%s\n", godebug.LF())
}
}
/*
// xyzzy - allEvents
for _, c2 := range h.allEvents {
args := c2.GetArgs() // returns Array of interface{}
olen := len(args)
}
*/
h.lock.RLock()
c, ok := h.events[message]
xc, ok1 := h.x_events[message]
h.lock.RUnlock()
if !ok && !ok1 {
if Db1 {
fmt.Printf("Did not have a handler for %s At:%s\n", message, godebug.LF())
}
// If the message is not recognized by the server, the decoder.currentCloser
// needs to be closed otherwise the server will be stuck until the e xyzzy
fmt.Printf("Error: %s was not found in h.events\n", message)
decoder.Close()
return nil, nil
}
_ = xc
/* New -----------------------------------------------------------------------------------------------------------------
if ok1 {
// type EventHandlerFunc func(so *Socket, message string, args [][]byte) error
err, xargs, nargs := decoder.DecodeDataX(packet)
if err != nil {
fmt.Printf("Unable to decode packet, %s, %s\n", err, godebug.LF())
return nil, err
}
err := xc(xyzzy, message, xargs, nargs)
if err != nil {
fmt.Printf("Handler reported an error: %s, message=%s\n", err, message, godebug.LF())
return nil, err
}
return nil, nil
}
*/
args := c.GetArgs() // returns Array of interface{}
if Db1 {
fmt.Printf("len(args) = %d At:%s\n", len(args), godebug.LF())
}
olen := len(args)
if Db1 {
fmt.Printf("args = %v, %s\n", args, godebug.LF())
}
if olen > 0 {
packet.Data = &args
if err := decoder.DecodeData(packet); err != nil {
if Db1 {
fmt.Printf("At:%s, err=%s, an error at this point means that your handler did not get called\n", godebug.LF(), err)
}
fmt.Printf("Try a `map[string]interface{}` for a parameter type, %s\n", godebug.LF())
return nil, err
}
}
// Padd out args to olen
for i := len(args); i < olen; i++ {
args = append(args, nil)
}
if DbLogMessage {
if Db1 {
fmt.Printf("\tArgs = %s, %s\n", godebug.SVar(args), godebug.LF())
} else {
fmt.Printf("Args = %s\n", godebug.SVar(args))
}
}
if LogMessage {
logrus.Infof("Message [%s] Auruments %s", message, godebug.SVar(args))
}
// ------------------------------------------------------ call ---------------------------------------------------------------------------------------
retV := c.Call(h.socket, args)
if len(retV) == 0 {
if Db1 {
fmt.Printf("At:%s\n", godebug.LF())
}
return nil, nil
}
var err error
if last, ok := retV[len(retV)-1].Interface().(error); ok {
err = last
retV = retV[0 : len(retV)-1]
}
ret := make([]interface{}, len(retV))
for i, v := range retV {
ret[i] = v.Interface()
}
if Db1 {
fmt.Printf("At:%s\n", godebug.LF())
}
if DbLogMessage {
if err != nil {
fmt.Printf("Response/Error %s", err)
} else {
fmt.Printf("Response %s", godebug.SVar(ret))
}
}
if LogMessage {
if err != nil {
logrus.Infof("Response/Error %s", err)
} else {
logrus.Infof("Response %s", godebug.SVar(ret))
}
}
return ret, err
}
func (h *socketHandler) onAck(id int, decoder *decoder, packet *packet) error {
h.lock.Lock()
defer h.lock.Unlock()
c, ok := h.acks[id]
if !ok {
return nil
}
delete(h.acks, id)
args := c.GetArgs()
packet.Data = &args
if err := decoder.DecodeData(packet); err != nil {
return err
}
c.Call(h.socket, args)
return nil
}
var Db1 = false
var DbLogMessage = true
var LogMessage = true
/* vim: set noai ts=4 sw=4: */