修复跨域问题，修改一些问题

api/admin/challenge.go

@@ -134,11 +134,12 @@ func EditChallenge(c *gin.Context) {
 	DB := db.DBsnctf
 	id := c.Param("id")
 	cid, _ := strconv.Atoi(id)
-	var request ChallengeRequest
+	var request ChallengeRequeststrings
 	if err := c.ShouldBindJSON(&request); err != nil {
 		c.JSON(400, gin.H{"code": 400, "msg": "Request format wrong!"})
 		return
 	}
+	visable, _ := strconv.Atoi(request.Visible)
 	attachmentString := strings.Join(request.Attachment, ",")
 	hintString := strings.Join(request.Hints, ",")
 	challenge := &CrDb{
@@ -150,7 +151,7 @@ func EditChallenge(c *gin.Context) {
 		Category:    request.Category,
 		Tags:        request.Tags,
 		Hints:       hintString,
-		Visible:     request.Visible,
+		Visible:     visable,
 	}
 	err := DB.Debug().Table("challenge").Where("id = ?", cid).Updates(challenge).Error
 	if err != nil {