add shorturl example code

example/shorturl/api/internal/logic/expandlogic.go

@@ -0,0 +1,26 @@
+package logic
+
+import (
+	"context"
+
+	"shorturl/api/internal/svc"
+	"shorturl/api/internal/types"
+
+	"github.com/tal-tech/go-zero/core/logx"
+)
+
+type ExpandLogic struct {
+	ctx context.Context
+	logx.Logger
+}
+
+func NewExpandLogic(ctx context.Context, svcCtx *svc.ServiceContext) ExpandLogic {
+	return ExpandLogic{
+		ctx:    ctx,
+		Logger: logx.WithContext(ctx),
+	}
+}
+
+func (l *ExpandLogic) Expand(req types.ExpandReq) (*types.ExpandResp, error) {
+	return &types.ExpandResp{}, nil
+}

example/shorturl/api/internal/logic/shortenlogic.go

@@ -0,0 +1,26 @@
+package logic
+
+import (
+	"context"
+
+	"shorturl/api/internal/svc"
+	"shorturl/api/internal/types"
+
+	"github.com/tal-tech/go-zero/core/logx"
+)
+
+type ShortenLogic struct {
+	ctx context.Context
+	logx.Logger
+}
+
+func NewShortenLogic(ctx context.Context, svcCtx *svc.ServiceContext) ShortenLogic {
+	return ShortenLogic{
+		ctx:    ctx,
+		Logger: logx.WithContext(ctx),
+	}
+}
+
+func (l *ShortenLogic) Shorten(req types.ShortenReq) (*types.ShortenResp, error) {
+	return &types.ShortenResp{}, nil
+}