fix: api descript

app/objectstory/api/internal/logic/file/getFileLogic.go

@@ -5,9 +5,13 @@ package file
 
 import (
 	"context"
+	"errors"
+	"strconv"
 
 	"juwan-backend/app/objectstory/api/internal/svc"
 	"juwan-backend/app/objectstory/api/internal/types"
+	"juwan-backend/app/objectstory/rpc/fileservice"
+	"juwan-backend/common/utils/contextx"
 
 	"github.com/zeromicro/go-zero/core/logx"
 )
@@ -27,8 +31,26 @@ func NewGetFileLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetFileLo
 	}
 }
 
-func (l *GetFileLogic) GetFile(req *types.GetFileReq) error {
-	// todo: add your logic here and delete this line
+func (l *GetFileLogic) GetFile(req *types.GetFileReq) (string, error) {
+	if req == nil || req.FileId == "" {
+		return "", errors.New("file id is required")
+	}
 
-	return nil
+	userID, err := contextx.UserIDFrom(l.ctx)
+	if err != nil {
+		return "", contextx.ERRILLEGALUSER
+	}
+
+	rpcResp, err := l.svcCtx.FileRpc.GetFileUrl(l.ctx, &fileservice.GetFileUrlReq{
+		FileId: req.FileId,
+		UserId: strconv.FormatInt(userID, 10),
+	})
+	if err != nil {
+		return "", err
+	}
+	if rpcResp.GetUrl() == "" {
+		return "", errors.New("file url is empty")
+	}
+
+	return rpcResp.GetUrl(), nil
 }