143 lines
3.1 KiB
Go
143 lines
3.1 KiB
Go
package overflow_gateway_websocket
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import (
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"context"
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"net/http"
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"go.uber.org/zap"
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"git.loafle.net/commons_go/logging"
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channelUtil "git.loafle.net/commons_go/util/channel"
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"git.loafle.net/overflow/overflow_gateway_websocket/websocket"
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"github.com/valyala/fasthttp"
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)
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type ()
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type socketsChannelAction struct {
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channelUtil.Action
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s Socket
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}
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type Server interface {
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ListenAndServe(addr string) error
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HandleSocket(pattern string, o *SocketOptions)
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}
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type server struct {
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_ctx context.Context
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_logger *zap.Logger
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_option *ServerOptions
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_upgrader *websocket.Upgrader
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_handlers map[string]*SocketOptions
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_sockets map[string]Socket
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_socketsCh chan socketsChannelAction
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}
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func NewServer(ctx context.Context, o *ServerOptions) Server {
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s := &server{
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_ctx: ctx,
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_logger: logging.WithContext(ctx),
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_option: o.Validate(),
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_handlers: make(map[string]*SocketOptions, 1),
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_sockets: make(map[string]Socket, 100),
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_socketsCh: make(chan socketsChannelAction),
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}
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s._upgrader = &websocket.Upgrader{
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HandshakeTimeout: s._option.HandshakeTimeout,
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ReadBufferSize: s._option.ReadBufferSize,
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WriteBufferSize: s._option.WriteBufferSize,
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CheckOrigin: s._option.OnCheckOrigin,
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Error: s.onError,
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EnableCompression: s._option.EnableCompression,
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}
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return s
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}
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func (s *server) addSocket(soc Socket) {
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ca := socketsChannelAction{
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s: soc,
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}
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ca.Type = channelUtil.ActionTypeCreate
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s._socketsCh <- ca
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}
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func (s *server) removeSocket(soc Socket) {
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ca := socketsChannelAction{
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s: soc,
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}
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ca.Type = channelUtil.ActionTypeDelete
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s._socketsCh <- ca
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}
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func (s *server) onError(ctx *fasthttp.RequestCtx, status int, reason error) {
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ctx.Response.Header.Set("Sec-Websocket-Version", "13")
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ctx.Error(http.StatusText(status), status)
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s._option.OnError(ctx, status, reason)
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}
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func (s *server) onDisconnected(soc Socket) {
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s.removeSocket(soc)
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s._option.OnDisconnected(soc)
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}
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func (s *server) onConnection(ctx *fasthttp.RequestCtx) {
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path := string(ctx.Path())
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co, ok := s._handlers[path]
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if !ok {
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s.onError(ctx, fasthttp.StatusNotFound, nil)
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return
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}
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s._upgrader.Upgrade(ctx, nil, func(conn *websocket.Conn, err error) {
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if err != nil {
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s.onError(ctx, fasthttp.StatusInternalServerError, err)
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return
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}
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id := s._option.IDGenerator(ctx)
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soc := NewSocket(s._ctx, id, path, co, conn)
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s.addSocket(soc)
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s._option.OnConnection(soc)
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soc.run()
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})
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}
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func (s *server) listenHandler() {
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for {
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select {
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case <-s._ctx.Done():
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s._logger.Info("websocket server: Context Done")
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return
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case ca := <-s._socketsCh:
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switch ca.Type {
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case channelUtil.ActionTypeCreate:
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s._sockets[ca.s.ID()] = ca.s
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break
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case channelUtil.ActionTypeDelete:
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delete(s._sockets, ca.s.ID())
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break
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}
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}
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}
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}
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func (s *server) Sockets() map[string]Socket {
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return s._sockets
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}
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func (s *server) HandleSocket(pattern string, o *SocketOptions) {
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o.onDisconnected = s.onDisconnected
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s._handlers[pattern] = o.Validate()
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}
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func (s *server) ListenAndServe(addr string) error {
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go s.listenHandler()
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return fasthttp.ListenAndServe(addr, s.onConnection)
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}
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