gRPC Go服务器中如何使用中间件设置Cookie？

import (
    "context"
    "net/http"
    "time"

    "google.golang.org/grpc/codes"
    "google.golang.org/grpc/credentials"
    "google.golang.org/grpc/grpclog"
    "google.golang.org/grpc/status"
    "google.golang.org/grpc/tap"
)

type myauthmiddleware struct {
    *tap.serverintaphandle
}

func newmyauthmiddleware() *myauthmiddleware {
    return &myauthmiddleware{
        tap.serverintaphandle{
            recv: myauthunaryserverinterceptor,
        },
    }
}

func myauthunaryserverinterceptor(ctx context.Context, info *tap.Info) (context.Context, error) {
    token := info.Header().Get("authorization")
    if token == "" {
        grpclog.Error("Authorization token is empty")
        return ctx, status.Error(codes.Unauthenticated, "Authorization token is empty")
    }

    //  验证token并提取用户信息 (此处为示例，需替换为实际的token验证逻辑)
    claims, err := verifyToken(token)
    if err != nil {
        grpclog.Errorf("Failed to verify token: %v", err)
        return ctx, status.Error(codes.Unauthenticated, "Failed to verify token")
    }

    // 设置Cookie
    http.SetCookie(info.Trailer, &http.Cookie{
        Name:    "username",
        Value:   claims.Username,
        Expires: time.Now().Add(24 * time.Hour),
    })

    // 将用户信息添加到上下文
    return context.WithValue(ctx, "username", claims.Username), nil
}

// verifyToken  此处需替换为你的token验证逻辑
func verifyToken(token string) (*Claims, error) {
    // ... your token verification logic ...
    return nil, nil
}

// Claims  此处需替换为你的Claims结构体
type Claims struct {
    Username string `json:"username"`
    // ... other claims ...
}

import (
    "google.golang.org/grpc"
)

func SetupMiddleware(server *grpc.Server) {
    server.AddInTapHandle(newmyauthmiddleware())
}