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conn_packet.go
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conn_packet.go
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package socketio
import (
"fmt"
"reflect"
"github.com/thisismz/go-socket.io/v4/parser"
)
func (c *conn) ackPacketHandler(header parser.Header) error {
nc, ok := c.namespaceConns.Get(header.Namespace)
if !ok {
_ = c.decoder.DiscardLast()
return nil
}
rawFunc, ok := nc.ack.LoadAndDelete(header.ID)
if !ok {
return nil
}
f, ok := rawFunc.(*funcHandler)
if !ok {
nc.conn.onError(nc.namespace, fmt.Errorf("incorrect data stored for header %d", header.ID))
return nil
}
args, err := nc.decoder.DecodeArgs(f.argTypes)
if err != nil {
nc.conn.onError(nc.namespace, err)
return nil
}
if _, err := f.Call(args); err != nil {
nc.conn.onError(nc.namespace, err)
return nil
}
return nil
}
func (c *conn) eventPacketHandler(event string, header parser.Header) error {
conn, ok := c.namespaceConns.Get(header.Namespace)
if !ok {
_ = c.decoder.DiscardLast()
return nil
}
handler, ok := c.handlers.Get(header.Namespace)
if !ok {
_ = c.decoder.DiscardLast()
return nil
}
args, err := c.decoder.DecodeArgs(handler.getEventTypes(event))
if err != nil {
c.onError(header.Namespace, err)
return errDecodeArgs
}
ret, err := handler.dispatchEvent(conn, event, args...)
if err != nil {
c.onError(header.Namespace, err)
return errHandleDispatch
}
if len(ret) > 0 {
header.Type = parser.Ack
c.write(header, ret...)
}
return nil
}
func (c *conn) connectPacketHandler(header parser.Header) error {
args, err := c.decoder.DecodeArgs(defaultHeaderType)
if err != nil {
c.onError(header.Namespace, err)
return errDecodeArgs
}
handler, ok := c.handlers.Get(header.Namespace)
if !ok {
c.onError(header.Namespace, errFailedConnectNamespace)
return errFailedConnectNamespace
}
conn, ok := c.namespaceConns.Get(header.Namespace)
if !ok {
conn = newNamespaceConn(c, header.Namespace, handler.broadcast)
c.namespaceConns.Set(header.Namespace, conn)
conn.Join(c.ID())
}
_, err = handler.dispatch(conn, header, args...)
if err != nil {
c.onError(header.Namespace, err)
return errHandleDispatch
}
c.writeWithArgs(header, reflect.ValueOf(map[string]interface{}{
"sid": conn.ID(),
}))
return nil
}
func (c *conn) disconnectPacketHandler(header parser.Header) error {
args, err := c.decoder.DecodeArgs(disconnectHeaderType)
if err != nil {
c.onError(header.Namespace, err)
return errDecodeArgs
}
conn, ok := c.namespaceConns.Get(header.Namespace)
if !ok {
_ = c.decoder.DiscardLast()
return nil
}
conn.LeaveAll()
c.namespaceConns.Delete(header.Namespace)
handler, ok := c.handlers.Get(header.Namespace)
if !ok {
return nil
}
_, err = handler.dispatch(conn, header, args...)
if err != nil {
c.onError(header.Namespace, err)
return errHandleDispatch
}
return nil
}
var (
defaultHeaderType = []reflect.Type{reflect.TypeOf(make(map[string]interface{}))}
disconnectHeaderType = []reflect.Type{reflect.TypeOf(""), reflect.TypeOf(make(map[string]interface{}))}
)
const (
goSocketIOConnInterface = "Conn"
)
type funcHandler struct {
argTypes []reflect.Type
f reflect.Value
}
func (h *funcHandler) Call(args []reflect.Value) (ret []reflect.Value, err error) {
defer func() {
if r := recover(); r != nil {
var ok bool
err, ok = r.(error)
if !ok {
err = fmt.Errorf("event call error: %s", r)
}
}
}()
ret = h.f.Call(args)
return
}
func newEventFunc(f interface{}) *funcHandler {
fv := reflect.ValueOf(f)
if fv.Kind() != reflect.Func {
panic("event handler must be a func.")
}
ft := fv.Type()
if ft.NumIn() < 1 || ft.In(0).Name() != goSocketIOConnInterface {
panic("handler function should be like func(socketio.Conn, ...)")
}
argTypes := make([]reflect.Type, ft.NumIn()-1)
for i := range argTypes {
argTypes[i] = ft.In(i + 1)
}
if len(argTypes) == 0 {
argTypes = nil
}
return &funcHandler{
argTypes: argTypes,
f: fv,
}
}
func newAckFunc(f interface{}) *funcHandler {
fv := reflect.ValueOf(f)
if fv.Kind() != reflect.Func {
panic("ack callback must be a func.")
}
ft := fv.Type()
argTypes := make([]reflect.Type, ft.NumIn())
for i := range argTypes {
argTypes[i] = ft.In(i)
}
if len(argTypes) == 0 {
argTypes = nil
}
return &funcHandler{
argTypes: argTypes,
f: fv,
}
}