Add HW 2

2026-09-17 16:34:16 +03:00
parent 43f49f4b2a
commit a5011dd94b
28 changed files with 1468 additions and 0 deletions
@@ -0,0 +1,12 @@
+module github.com/distsys-course/grpc-messenger/client
+
+go 1.23
+
+replace github.com/distsys-course/grpc-messenger/grpc => ../proto
+
+require (
+	github.com/distsys-course/grpc-messenger/grpc v0.0.0-00010101000000-000000000000
+	github.com/gin-gonic/gin v1.10.1
+	github.com/golang/protobuf v1.5.4
+	google.golang.org/grpc v1.75.0
+)
@@ -0,0 +1,80 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+	"sync"
+	"time"
+	
+	mes_grpc "github.com/distsys-course/grpc-messenger/grpc"
+	"github.com/gin-gonic/gin"
+	"github.com/golang/protobuf/jsonpb"
+	"google.golang.org/grpc"
+)
+
+type ChatMessage struct {
+	Author   string    `json:"author"`
+	Text     string    `json:"text"`
+	SendTime time.Time `json:"sendTime"`
+}
+
+type MessengerClient struct {
+	pendingMessages []ChatMessage
+	pendingMutex    sync.Mutex
+	grpcClient      YourMessengerServerClient
+}
+
+func NewMessengerClient(serverAddr string) *MessengerClient {
+	// TODO
+}
+
+func (c *MessengerClient) ReadMessages() {
+	// TODO: implement messages consumer here
+}
+
+func (c *MessengerClient) GetPending() (messages []ChatMessage) {
+	c.pendingMutex.Lock()
+	result := c.pendingMessages
+	c.pendingMessages = nil
+	c.pendingMutex.Unlock()
+	return result
+}
+
+type MessageResponse struct {
+	SendTime *time.Time `json:"sendTime"`
+	Error    *string    `json:"error"`
+}
+
+func main() {
+	r := gin.Default()
+	serverAddr := os.Getenv("MESSENGER_SERVER_ADDR")
+	if serverAddr == "" {
+		serverAddr = "localhost:51075"
+		fmt.Println("Missing MESSENGER_SERVER_ADDR variable, using default value: " + serverAddr)
+	}
+	// TODO: create your grpc client with given address
+	r.POST("/getAndFlushMessages", func(c *gin.Context) {
+		c.JSON(http.StatusOK, client.GetPending())
+	})
+
+	r.POST("/sendMessage", func(c *gin.Context) {
+		// TODO: implement send message here, that parses body into protobuf and sends to the server
+		c.JSON(http.StatusOK, MessageResponse{SendTime: nil})  // TODO: do not forget to fill SendTime
+		return
+	})
+
+	// TODO: run consumer in a goroutine
+
+	addr := os.Getenv("MESSENGER_HTTP_PORT")
+	if addr == "" {
+		addr = "0.0.0.0:8080"
+		fmt.Println("Missing MESSENGER_HTTP_PORT variable, using default value: 8080")
+	} else {
+		addr = "0.0.0.0:" + addr
+	}
+	if err := r.Run(addr); err != nil {
+		panic(err)
+	}
+}