feat(config): 添加 gRPC 服务器配置支持

- 在配置结构中新增 GRPCServer 类型，包含 Host 和 Port 字段
- 更新 Load 函数以支持从环境变量读取 gRPC 服务器的配置
- 引入 gRPC 和 protobuf 依赖以支持 gRPC 功能

server/go.mod

@@ -6,6 +6,8 @@ require (
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/tjfoc/gmsm v1.4.1
 	github.com/xuri/excelize/v2 v2.8.1
+	google.golang.org/grpc v1.60.1
+	google.golang.org/protobuf v1.32.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 

server/internal/config/config.go

@@ -17,14 +17,27 @@ type DB struct {
 	Name     string `yaml:"name"`
 }
 
+type GRPCServer struct {
+	Host string `yaml:"host"`
+	Port string `yaml:"port"`
+}
+
+func (g GRPCServer) Address() string {
+	if g.Host == "" || g.Port == "" {
+		return ""
+	}
+	return g.Host + ":" + g.Port
+}
+
 type App struct {
-	Port                     string `yaml:"port"`
+	Port                     string     `yaml:"port"`
-	MarketingDB              DB     `yaml:"marketing_db"`
+	MarketingDB              DB         `yaml:"marketing_db"`
-	MarketingAuthorizationDB DB     `yaml:"marketing_authorization_db"`
+	MarketingAuthorizationDB DB         `yaml:"marketing_authorization_db"`
-	MarketingResellerDB      DB     `yaml:"marketing_reseller_db"`
+	MarketingResellerDB      DB         `yaml:"marketing_reseller_db"`
-	YMTDB                    DB     `yaml:"ymt_db"`
+	YMTDB                    DB         `yaml:"ymt_db"`
-	YMTTestDB                DB     `yaml:"ymt_test_db"`
+	YMTTestDB                DB         `yaml:"ymt_test_db"`
-	YMTKeyDecryptKeyB64      string `yaml:"ymt_key_decrypt_key_b64"`
+	YMTKeyDecryptKeyB64      string     `yaml:"ymt_key_decrypt_key_b64"`
+	GRPCServer               GRPCServer `yaml:"grpc_server"`
 }
 
 type root struct {
@@ -84,6 +97,13 @@ func Load() App {
 	if v := os.Getenv("YMT_TEST_DB_NAME"); v != "" {
 		cfg.YMTTestDB.Name = v
 	}
+	// gRPC server env overrides
+	if v := os.Getenv("GRPC_SERVER_HOST"); v != "" {
+		cfg.GRPCServer.Host = v
+	}
+	if v := os.Getenv("GRPC_SERVER_PORT"); v != "" {
+		cfg.GRPCServer.Port = v
+	}
 	return cfg
 }
 

server/internal/grpc/user_client.go

@@ -0,0 +1,93 @@
+package grpc
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/keepalive"
+	
+	// 使用生成的 proto 代码
+	// 注意：需要先运行 cd grpc && make generate 生成代码
+	userv1 "server/grpc/user/userv1"
+)
+
+var (
+	userClientOnce sync.Once
+	userClient     *UserClient
+)
+
+type UserClient struct {
+	conn   *grpc.ClientConn
+	addr   string
+	client userv1.UserClient
+}
+
+// NewUserClient 创建用户服务 gRPC 客户端
+func NewUserClient(addr string) (*UserClient, error) {
+	if addr == "" {
+		return nil, fmt.Errorf("gRPC server address is empty")
+	}
+
+	var err error
+	userClientOnce.Do(func() {
+		opts := []grpc.DialOption{
+			grpc.WithTransportCredentials(insecure.NewCredentials()),
+			grpc.WithKeepaliveParams(keepalive.ClientParameters{
+				Time:                10 * time.Second,
+				Timeout:             3 * time.Second,
+				PermitWithoutStream: true,
+			}),
+		}
+
+		conn, dialErr := grpc.Dial(addr, opts...)
+		if dialErr != nil {
+			err = fmt.Errorf("failed to connect to gRPC server %s: %w", addr, dialErr)
+			return
+		}
+
+		client := userv1.NewUserClient(conn)
+		userClient = &UserClient{
+			conn:   conn,
+			addr:   addr,
+			client: client,
+		}
+		log.Printf("gRPC user client connected to %s", addr)
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	return userClient, nil
+}
+
+// SimpleListAllUser 调用 SimpleListAllUser gRPC 方法
+func (c *UserClient) SimpleListAllUser(ctx context.Context, keyword string) (*userv1.SimpleListAllUserResp, error) {
+	req := &userv1.SimpleListAllUserReq{
+		Keyword: keyword,
+	}
+	resp, err := c.client.SimpleListAllUser(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("gRPC SimpleListAllUser failed: %w", err)
+	}
+	return resp, nil
+}
+
+// Close 关闭连接
+func (c *UserClient) Close() error {
+	if c.conn != nil {
+		return c.conn.Close()
+	}
+	return nil
+}
+
+// GetConn 获取 gRPC 连接（用于直接调用生成的客户端）
+func (c *UserClient) GetConn() *grpc.ClientConn {
+	return c.conn
+}
+