feat: integrate Kafka consumer into WebSocket server and enhance message handling capabilities

app/websocket/cmd/websocket/main.go

@@ -34,7 +34,7 @@ func init() {
 	flag.StringVar(&flagconf, "conf", "../../configs", "config path, eg: -conf config.yaml")
 }
 
-func newApp(logger log.Logger, ws *server.WebSocketServer, gs *grpc.Server, hs *http.Server) *kratos.App {
+func newApp(logger log.Logger, ks *server.KafkaConsumerServer, ws *server.WebSocketServer, gs *grpc.Server, hs *http.Server) *kratos.App {
 	return kratos.New(
 		kratos.ID(id),
 		kratos.Name(Name),
@@ -42,6 +42,7 @@ func newApp(logger log.Logger, ws *server.WebSocketServer, gs *grpc.Server, hs *
 		kratos.Metadata(map[string]string{}),
 		kratos.Logger(logger),
 		kratos.Server(
+			ks,
 			ws,
 			gs,
 			hs,

app/websocket/cmd/websocket/wire.go

@@ -18,13 +18,6 @@ import (
 )
 
 // wireApp init kratos application.
-func wireApp(c *conf.Server, d *conf.Data, logger log.Logger) (*kratos.App, func(), error) {
+func wireApp(*conf.Server, *conf.Data, log.Logger) (*kratos.App, func(), error) {
-	wire.Build(
+	panic(wire.Build(server.ProviderSet, data.ProviderSet, biz.ProviderSet, service.ProviderSet, newApp))
-		data.ProviderSet,
-		biz.ProviderSet,
-		service.ProviderSet,
-		server.ProviderSet,
-		newApp,
-	)
-	return nil, nil, nil
 }

app/websocket/cmd/websocket/wire_gen.go

@@ -23,19 +23,22 @@ import (
 // Injectors from wire.go:
 
 // wireApp init kratos application.
-func wireApp(c *conf.Server, d *conf.Data, logger log.Logger) (*kratos.App, func(), error) {
+func wireApp(confServer *conf.Server, confData *conf.Data, logger log.Logger) (*kratos.App, func(), error) {
-	dataData, cleanup, err := data.NewData(d, logger)
+	dataData, cleanup, err := data.NewData(confData, logger)
 	if err != nil {
 		return nil, nil, err
 	}
 	webSocketRepo := data.NewWebSocketRepo(dataData, logger)
 	webSocketUsecase := biz.NewWebSocketUsecase(webSocketRepo)
 	webSocketService := service.NewWebSocketService(webSocketUsecase)
-	webSocketServer := server.NewWebSocketServer(c, webSocketService)
+	messageHandler := service.NewMessageHandler(webSocketService)
-	grpcServer := server.NewGRPCServer(c, logger)
+	kafkaConsumerServer, cleanup2 := server.NewKafkaConsumerServer(confData, messageHandler)
-	httpServer := server.NewHTTPServer(c, logger)
+	webSocketServer := server.NewWebSocketServer(confServer, webSocketService)
-	app := newApp(logger, webSocketServer, grpcServer, httpServer)
+	grpcServer := server.NewGRPCServer(confServer, logger)
+	httpServer := server.NewHTTPServer(confServer, logger)
+	app := newApp(logger, kafkaConsumerServer, webSocketServer, grpcServer, httpServer)
 	return app, func() {
+		cleanup2()
 		cleanup()
 	}, nil
 }

app/websocket/configs/config.yaml

@@ -20,3 +20,4 @@ data:
     brokers:
       - 47.108.232.131:9092
     topic: websocket-topic
+    partition: 0

app/websocket/internal/conf/conf.pb.go

@@ -354,6 +354,7 @@ type Data_Kafka struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Brokers       []string               `protobuf:"bytes,1,rep,name=brokers,proto3" json:"brokers,omitempty"`
 	Topic         string                 `protobuf:"bytes,2,opt,name=topic,proto3" json:"topic,omitempty"`
+	Partition     int64                  `protobuf:"varint,3,opt,name=partition,proto3" json:"partition,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -402,6 +403,13 @@ func (x *Data_Kafka) GetTopic() string {
 	return ""
 }
 
+func (x *Data_Kafka) GetPartition() int64 {
+	if x != nil {
+		return x.Partition
+	}
+	return 0
+}
+
 var File_conf_conf_proto protoreflect.FileDescriptor
 
 const file_conf_conf_proto_rawDesc = "" +
@@ -425,12 +433,13 @@ const file_conf_conf_proto_rawDesc = "" +
 	"\atimeout\x18\x03 \x01(\v2\x19.google.protobuf.DurationR\atimeout\x1a3\n" +
 	"\tWebSocket\x12\x12\n" +
 	"\x04addr\x18\x01 \x01(\tR\x04addr\x12\x12\n" +
-	"\x04path\x18\x02 \x01(\tR\x04path\"m\n" +
+	"\x04path\x18\x02 \x01(\tR\x04path\"\x8b\x01\n" +
 	"\x04Data\x12,\n" +
-	"\x05kafka\x18\x01 \x01(\v2\x16.kratos.api.Data.KafkaR\x05kafka\x1a7\n" +
+	"\x05kafka\x18\x01 \x01(\v2\x16.kratos.api.Data.KafkaR\x05kafka\x1aU\n" +
 	"\x05Kafka\x12\x18\n" +
 	"\abrokers\x18\x01 \x03(\tR\abrokers\x12\x14\n" +
-	"\x05topic\x18\x02 \x01(\tR\x05topicB/Z-ky-go-kratos/app/websocket/internal/conf;confb\x06proto3"
+	"\x05topic\x18\x02 \x01(\tR\x05topic\x12\x1c\n" +
+	"\tpartition\x18\x03 \x01(\x03R\tpartitionB/Z-ky-go-kratos/app/websocket/internal/conf;confb\x06proto3"
 
 var (
 	file_conf_conf_proto_rawDescOnce sync.Once

app/websocket/internal/conf/conf.proto

@@ -34,6 +34,7 @@ message Data {
   message Kafka {
     repeated string brokers = 1;
     string topic = 2;
+    int64 partition = 3;
   }
   Kafka kafka = 1;
 }

app/websocket/internal/server/kafka_consume.go

@@ -0,0 +1,79 @@
+package server
+
+import (
+	"context"
+	"sync"
+
+	"ky-go-kratos/app/websocket/internal/conf"
+	"ky-go-kratos/app/websocket/internal/service"
+	"ky-go-kratos/pkg/kafka"
+
+	"github.com/go-kratos/kratos/v2/log"
+)
+
+type KafkaConsumerServer struct {
+	consumer       *kafka.KafkaConsumer
+	messageHandler *service.MessageHandler
+	wg             sync.WaitGroup
+}
+
+func NewKafkaConsumerServer(c *conf.Data, messageHandler *service.MessageHandler) (*KafkaConsumerServer, func()) {
+	consumer := kafka.NewKafkaReader(c.Kafka.Brokers, c.Kafka.Topic, int(c.Kafka.Partition))
+	server := &KafkaConsumerServer{
+		consumer:       consumer,
+		messageHandler: messageHandler,
+	}
+
+	ctx := context.Background()
+	if err := server.Start(ctx); err != nil {
+		panic(err)
+	}
+
+	return server, func() {
+		if err := server.Stop(ctx); err != nil {
+			log.Errorf("failed to stop kafka consumer: %v", err)
+		}
+	}
+}
+
+func (s *KafkaConsumerServer) Start(ctx context.Context) error {
+	if err := s.messageHandler.Start(); err != nil {
+		return err
+	}
+
+	s.wg.Add(1)
+	go s.consumeMessages(ctx)
+	return nil
+}
+
+func (s *KafkaConsumerServer) Stop(ctx context.Context) error {
+	s.wg.Wait()
+	if err := s.messageHandler.Stop(); err != nil {
+		return err
+	}
+	return s.consumer.Close()
+}
+
+func (s *KafkaConsumerServer) consumeMessages(ctx context.Context) {
+	defer s.wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		default:
+			message, err := s.consumer.Reader.ReadMessage(ctx)
+			log.Infof("message data: %v", message)
+			if err != nil {
+				if s.consumer.IsTransientNetworkError(err) {
+					continue
+				}
+				return
+			}
+
+			if err := s.messageHandler.HandleMessage(&message); err != nil {
+				log.Errorf("failed to handle message: %v", err)
+			}
+		}
+	}
+}

app/websocket/internal/server/server.go

@@ -5,4 +5,4 @@ import (
 )
 
 // ProviderSet is server providers.
-var ProviderSet = wire.NewSet(NewGRPCServer, NewHTTPServer, NewWebSocketServer)
+var ProviderSet = wire.NewSet(NewGRPCServer, NewHTTPServer, NewWebSocketServer, NewKafkaConsumerServer)

app/websocket/internal/service/message_handler.go

@@ -0,0 +1,92 @@
+package service
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+
+	kafkago "github.com/segmentio/kafka-go"
+)
+
+// MessageHandler 处理 Kafka 消息
+type MessageHandler struct {
+	wsService *WebSocketService
+}
+
+// WebSocketMessage 定义 WebSocket 消息结构
+type WebSocketMessage struct {
+	Type    string          `json:"type"`
+	Content string          `json:"content"`
+	Payload json.RawMessage `json:"payload,omitempty"`
+}
+
+func NewMessageHandler(wsService *WebSocketService) *MessageHandler {
+	return &MessageHandler{
+		wsService: wsService,
+	}
+}
+
+func (h *MessageHandler) Start() error {
+	return nil
+}
+
+func (h *MessageHandler) Stop() error {
+	return nil
+}
+
+// parseJSONMessage 解析并格式化 JSON 消息
+func (h *MessageHandler) parseJSONMessage(message []byte) (string, error) {
+	var jsonData interface{}
+	if err := json.Unmarshal(message, &jsonData); err != nil {
+		return "", fmt.Errorf("failed to parse JSON: %v", err)
+	}
+
+	prettyJSON, err := json.MarshalIndent(jsonData, "", "    ")
+	if err != nil {
+		return "", fmt.Errorf("failed to format JSON: %v", err)
+	}
+
+	return string(prettyJSON), nil
+}
+
+// parseWebSocketMessage 解析为 WebSocketMessage 结构
+func (h *MessageHandler) parseWebSocketMessage(message []byte) (*WebSocketMessage, error) {
+	var wsMsg WebSocketMessage
+	if err := json.Unmarshal(message, &wsMsg); err != nil {
+		return nil, fmt.Errorf("failed to parse WebSocket message: %v", err)
+	}
+	return &wsMsg, nil
+}
+
+func (h *MessageHandler) HandleMessage(message *kafkago.Message) error {
+	// 解析并打印格式化的 JSON
+	prettyJSON, err := h.parseJSONMessage(message.Value)
+	if err != nil {
+		log.Printf("Error parsing message: %v", err)
+		return err
+	}
+	fmt.Printf("Received message:\n%s\n", prettyJSON)
+
+	// 解析为 WebSocketMessage
+	wsMsg, err := h.parseWebSocketMessage(message.Value)
+	if err != nil {
+		log.Printf("Error parsing WebSocket message: %v", err)
+		return err
+	}
+
+	// 根据消息类型处理不同的业务逻辑
+	switch wsMsg.Type {
+	case "message":
+		// 处理普通消息
+		return h.wsService.Broadcast(message.Value)
+	case "broadcast":
+		// 广播消息给所有连接的客户端
+		return h.wsService.Broadcast(wsMsg.Payload)
+	case "private":
+		// 处理私聊消息
+		return h.wsService.SendPrivateMessage(wsMsg.Payload)
+	default:
+		log.Printf("Unknown message type: %s", wsMsg.Type)
+		return nil
+	}
+}

app/websocket/internal/service/service.go

@@ -1,6 +1,8 @@
 package service
 
-import "github.com/google/wire"
+import (
+	"github.com/google/wire"
+)
 
 // ProviderSet is service providers.
-var ProviderSet = wire.NewSet(NewWebSocketService)
+var ProviderSet = wire.NewSet(NewWebSocketService, NewMessageHandler)

app/websocket/internal/service/websocket.go

@@ -2,20 +2,76 @@ package service
 
 import (
 	"context"
+	"encoding/json"
 	"ky-go-kratos/app/websocket/internal/biz"
+	"log"
+	"sync"
 )
 
 // WebSocketService is a WebSocket service.
 type WebSocketService struct {
 	uc         *biz.WebSocketUsecase
+	clients    map[string]*Client
+	clientsMux sync.RWMutex
+}
+
+type Client struct {
+	ID     string
+	Send   chan []byte
+	Topics map[string]bool
 }
 
 // NewWebSocketService new a WebSocket service.
 func NewWebSocketService(uc *biz.WebSocketUsecase) *WebSocketService {
-	return &WebSocketService{uc: uc}
+	return &WebSocketService{
+		uc:      uc,
+		clients: make(map[string]*Client),
+	}
 }
 
 // HandleMessage handles incoming WebSocket messages.
 func (s *WebSocketService) HandleMessage(ctx context.Context, message []byte) error {
 	return s.uc.HandleMessage(ctx, message)
 }
+
+// Broadcast 广播消息给所有客户端
+func (s *WebSocketService) Broadcast(message json.RawMessage) error {
+	s.clientsMux.RLock()
+	defer s.clientsMux.RUnlock()
+
+	for _, client := range s.clients {
+		select {
+		case client.Send <- message:
+		default:
+			log.Printf("Client %s buffer is full, message dropped", client.ID)
+		}
+	}
+	return nil
+}
+
+// SendPrivateMessage 发送私聊消息
+func (s *WebSocketService) SendPrivateMessage(message json.RawMessage) error {
+	var msg struct {
+		To      string          `json:"to"`
+		Content json.RawMessage `json:"content"`
+	}
+
+	if err := json.Unmarshal(message, &msg); err != nil {
+		return err
+	}
+
+	s.clientsMux.RLock()
+	client, exists := s.clients[msg.To]
+	s.clientsMux.RUnlock()
+
+	if !exists {
+		return nil
+	}
+
+	select {
+	case client.Send <- msg.Content:
+	default:
+		log.Printf("Client %s buffer is full, message dropped", client.ID)
+	}
+	return nil
+}

pkg/kafka/consumer.go

@@ -1 +1,39 @@
 package kafka
+
+import (
+	"errors"
+	"io"
+	"syscall"
+	"time"
+
+	"github.com/segmentio/kafka-go"
+)
+
+type KafkaConsumer struct {
+	Reader *kafka.Reader
+}
+
+func NewKafkaReader(brokers []string, topic string, partition int) *KafkaConsumer {
+	return &KafkaConsumer{
+		Reader: kafka.NewReader(kafka.ReaderConfig{
+			Brokers:        brokers,
+			Topic:          topic,
+			Partition:      partition,
+			MinBytes:       10e3,
+			MaxBytes:       10e6,
+			MaxWait:        500 * time.Millisecond,
+			CommitInterval: 5 * time.Second,
+		}),
+	}
+}
+
+func (c *KafkaConsumer) IsTransientNetworkError(err error) bool {
+	return errors.Is(err, io.ErrUnexpectedEOF) ||
+		errors.Is(err, syscall.ECONNREFUSED) ||
+		errors.Is(err, syscall.ECONNRESET) ||
+		errors.Is(err, syscall.EPIPE)
+}
+
+func (c *KafkaConsumer) Close() error {
+	return c.Reader.Close()
+}