diff --git a/code/rest/share_controller.go b/code/rest/share_controller.go
index e8028ea..e0838e9 100644
--- a/code/rest/share_controller.go
+++ b/code/rest/share_controller.go
@@ -70,38 +70,19 @@ func (this *ShareController) RegisterRoutes() map[string]func(writer http.Respon
 
 func (this *ShareController) Create(writer http.ResponseWriter, request *http.Request) *result.WebResult {
 
-	matterUuids := request.FormValue("matterUuids")
-	expireInfinityStr := request.FormValue("expireInfinity")
-	expireTimeStr := request.FormValue("expireTime")
-
-	if matterUuids == "" {
-		panic(result.BadRequest("matterUuids cannot be null"))
-	}
-
-	var expireTime time.Time
-	expireInfinity := false
-	if expireInfinityStr == TRUE {
-		expireInfinity = true
-		expireTime = time.Now()
-	} else {
-
-		if expireTimeStr == "" {
-			panic(result.BadRequest("time format error"))
-		} else {
-			expireTime = util.ConvertDateTimeStringToTime(expireTimeStr)
-		}
+	uuidArray := util.ExtractRequestArray(request, "matterUuids")
+	expireInfinity := util.ExtractRequestBool(request, "expireInfinity")
+	spaceUuid := util.ExtractRequestString(request, "spaceUuid")
 
+	var expireTime = time.Now()
+	if !expireInfinity {
+		expireTime = util.ExtractRequestTime(request, "expireTime")
 		if expireTime.Before(time.Now()) {
 			panic(result.BadRequest("expire time cannot before now"))
 		}
-
 	}
 
-	uuidArray := strings.Split(matterUuids, ",")
-
-	if len(uuidArray) == 0 {
-		panic(result.BadRequest("share at least one file"))
-	} else if len(uuidArray) > SHARE_MAX_NUM {
+	if len(uuidArray) > SHARE_MAX_NUM {
 		panic(result.BadRequestI18n(request, i18n.ShareNumExceedLimit, len(uuidArray), SHARE_MAX_NUM))
 	}
 
@@ -150,6 +131,7 @@ func (this *ShareController) Create(writer http.ResponseWriter, request *http.Re
 		Code:           util.RandomString4(),
 		ExpireInfinity: expireInfinity,
 		ExpireTime:     expireTime,
+		SpaceUuid:      spaceUuid,
 	}
 	this.shareDao.Create(share)
 
@@ -194,14 +176,14 @@ func (this *ShareController) DeleteBatch(writer http.ResponseWriter, request *ht
 
 	for _, uuid := range uuidArray {
 
-		imageCache := this.shareDao.FindByUuid(uuid)
+		share := this.shareDao.FindByUuid(uuid)
 
 		user := this.checkUser(request)
-		if imageCache.UserUuid != user.Uuid {
+		if share.UserUuid != user.Uuid {
 			panic(result.UNAUTHORIZED)
 		}
 
-		this.shareDao.Delete(imageCache)
+		this.shareDao.Delete(share)
 	}
 
 	return this.Success("OK")
diff --git a/code/rest/share_model.go b/code/rest/share_model.go
index 996629c..aa23737 100644
--- a/code/rest/share_model.go
+++ b/code/rest/share_model.go
@@ -33,6 +33,7 @@ type Share struct {
 	Code           string    `json:"code" gorm:"type:varchar(45) not null"`
 	ExpireInfinity bool      `json:"expireInfinity" gorm:"type:tinyint(1) not null;default:0"`
 	ExpireTime     time.Time `json:"expireTime" gorm:"type:timestamp not null;default:'2018-01-01 00:00:00'"`
+	SpaceUuid      string    `json:"spaceUuid" gorm:"type:char(36) not null;index:idx_space_uuid"`
 	DirMatter      *Matter   `json:"dirMatter" gorm:"-"`
 	Matters        []*Matter `json:"matters" gorm:"-"`
 }
diff --git a/code/tool/util/util_params.go b/code/tool/util/util_params.go
index 007f77e..1bade3a 100644
--- a/code/tool/util/util_params.go
+++ b/code/tool/util/util_params.go
@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"net/http"
 	"strconv"
+	"strings"
+	"time"
 )
 
 // param is required. when missing, panic error.
@@ -26,6 +28,20 @@ func ExtractRequestStringWithErrorHint(request *http.Request, key string, errorH
 	}
 }
 
+// split by comma , param is required. when missing, panic error.
+func ExtractRequestArray(request *http.Request, key string) []string {
+	str := request.FormValue(key)
+	if str == "" {
+		panic(fmt.Sprintf("%s is required", key))
+	} else {
+		arr := strings.Split(str, ",")
+		if len(arr) == 0 {
+			panic(fmt.Sprintf("%s cannot be empty", key))
+		}
+		return arr
+	}
+}
+
 // param is required. when missing, panic error.
 func ExtractRequestInt64(request *http.Request, key string) int64 {
 	keyStr := request.FormValue(key)
@@ -85,6 +101,22 @@ func ExtractRequestOptionalString(request *http.Request, key string, defaultValu
 }
 
 // param is required. when missing, panic error.
+func ExtractRequestBool(request *http.Request, key string) bool {
+	str := request.FormValue(key)
+	if str == "true" {
+		return true
+	} else {
+		return false
+	}
+}
+
+// param is required. when missing, panic error.
+func ExtractRequestTime(request *http.Request, key string) time.Time {
+	str := request.FormValue(key)
+	return ConvertDateTimeStringToTime(str)
+}
+
+// param is optional. when missing, use default.
 func ExtractRequestOptionalBool(request *http.Request, key string, defaultValue bool) bool {
 	str := request.FormValue(key)
 	if str == "" {