mirror of
https://gitee.com/IrisVega/frp.git
synced 2024-11-01 22:31:29 +08:00
122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
// Copyright 2023 The frp Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package transport
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import (
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"context"
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"reflect"
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"sync"
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"github.com/fatedier/golib/errors"
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"github.com/fatedier/frp/pkg/msg"
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)
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type MessageTransporter interface {
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Send(msg.Message) error
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// Recv(ctx context.Context, laneKey string, msgType string) (Message, error)
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// Do will first send msg, then recv msg with the same laneKey and specified msgType.
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Do(ctx context.Context, req msg.Message, laneKey, recvMsgType string) (msg.Message, error)
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// Dispatch will dispatch message to related channel registered in Do function by its message type and laneKey.
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Dispatch(m msg.Message, laneKey string) bool
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// Same with Dispatch but with specified message type.
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DispatchWithType(m msg.Message, msgType, laneKey string) bool
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}
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func NewMessageTransporter(sendCh chan msg.Message) MessageTransporter {
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return &transporterImpl{
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sendCh: sendCh,
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registry: make(map[string]map[string]chan msg.Message),
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}
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}
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type transporterImpl struct {
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sendCh chan msg.Message
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// First key is message type and second key is lane key.
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// Dispatch will dispatch message to related channel by its message type
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// and lane key.
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registry map[string]map[string]chan msg.Message
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mu sync.RWMutex
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}
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func (impl *transporterImpl) Send(m msg.Message) error {
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return errors.PanicToError(func() {
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impl.sendCh <- m
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})
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}
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func (impl *transporterImpl) Do(ctx context.Context, req msg.Message, laneKey, recvMsgType string) (msg.Message, error) {
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ch := make(chan msg.Message, 1)
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defer close(ch)
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unregisterFn := impl.registerMsgChan(ch, laneKey, recvMsgType)
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defer unregisterFn()
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if err := impl.Send(req); err != nil {
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return nil, err
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}
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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case resp := <-ch:
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return resp, nil
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}
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}
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func (impl *transporterImpl) DispatchWithType(m msg.Message, msgType, laneKey string) bool {
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var ch chan msg.Message
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impl.mu.RLock()
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byLaneKey, ok := impl.registry[msgType]
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if ok {
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ch = byLaneKey[laneKey]
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}
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impl.mu.RUnlock()
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if ch == nil {
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return false
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}
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if err := errors.PanicToError(func() {
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ch <- m
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}); err != nil {
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return false
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}
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return true
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}
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func (impl *transporterImpl) Dispatch(m msg.Message, laneKey string) bool {
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msgType := reflect.TypeOf(m).Elem().Name()
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return impl.DispatchWithType(m, msgType, laneKey)
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}
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func (impl *transporterImpl) registerMsgChan(recvCh chan msg.Message, laneKey string, msgType string) (unregister func()) {
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impl.mu.Lock()
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byLaneKey, ok := impl.registry[msgType]
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if !ok {
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byLaneKey = make(map[string]chan msg.Message)
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impl.registry[msgType] = byLaneKey
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}
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byLaneKey[laneKey] = recvCh
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impl.mu.Unlock()
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unregister = func() {
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impl.mu.Lock()
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delete(byLaneKey, laneKey)
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impl.mu.Unlock()
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}
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return
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}
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