diff --git a/src/content/mod.ts b/src/content/mod.ts
index e69de29..db96484 100644
--- a/src/content/mod.ts
+++ b/src/content/mod.ts
@@ -0,0 +1 @@
+export {ContentReferrer,createContentReferrer} from './referrer';
\ No newline at end of file
diff --git a/src/model/contents.ts b/src/model/contents.ts
index 960fe5b..b3d32eb 100644
--- a/src/model/contents.ts
+++ b/src/model/contents.ts
@@ -37,7 +37,7 @@ export const isContent = (c: any):c is Content =>{
     return false;
 }
 
-export interface QueryListOption{
+export type QueryListOption = {
     /**
      * search word
      */
diff --git a/src/route/contents.ts b/src/route/contents.ts
index c278b45..c7c892c 100644
--- a/src/route/contents.ts
+++ b/src/route/contents.ts
@@ -1,6 +1,6 @@
 import { Context, Next } from 'koa';
 import Router from 'koa-router';
-import {ContentAccessor, isContentContent} from './../model/contents';
+import {Content, ContentAccessor, isContentContent} from './../model/contents';
 import {QueryListOption} from './../model/contents';
 import {ParseQueryNumber, ParseQueryArray, ParseQueryBoolean} from './util'
 import {sendError} from './error_handler';
@@ -57,6 +57,15 @@ const ContentQueryHandler = (controller : ContentAccessor) => async (ctx: Contex
     ctx.body = content;
     ctx.type = 'json';
 }
+const UpdateContentHandler = (controller : ContentAccessor) => async (ctx: Context, next: Next) => {
+    const num = Number.parseInt(ctx.params['num']);
+    const content_desc: Partial<Content> & {id: number} = {
+        id:num,...ctx.request.body
+    };
+    const success = await controller.update(content_desc);
+    ctx.body = JSON.stringify(success);
+    ctx.type = 'json';
+}
 const CreateContentHandler = (controller : ContentAccessor) => async (ctx: Context, next: Next) => {
     const content_desc = ctx.request.body;
     if(!isContentContent(content_desc)){
@@ -64,7 +73,7 @@ const CreateContentHandler = (controller : ContentAccessor) => async (ctx: Conte
         return;
     }
     const id = await controller.add(content_desc);
-    ctx.body = {"ret":id};
+    ctx.body = JSON.stringify(id);
     ctx.type = 'json';
 };
 const AddTagHandler = (controller: ContentAccessor)=>async (ctx: Context, next: Next)=>{
@@ -80,7 +89,7 @@ const AddTagHandler = (controller: ContentAccessor)=>async (ctx: Context, next:
         return;
     }
     const r = await controller.addTag(c,tag_name);
-    ctx.body = {ret:r}
+    ctx.body = JSON.stringify(r);
     ctx.type = 'json';
 };
 const DelTagHandler = (controller: ContentAccessor)=>async (ctx: Context, next: Next)=>{
@@ -96,13 +105,13 @@ const DelTagHandler = (controller: ContentAccessor)=>async (ctx: Context, next:
         return;
     }
     const r = await controller.delTag(c,tag_name);
-    ctx.body = {ret:r}
+    ctx.body = JSON.stringify(r);
     ctx.type = 'json';
 }
 const DeleteContentHandler = (controller : ContentAccessor) => async (ctx: Context, next: Next) => {
     const num = Number.parseInt(ctx.params['num']);
     const r = await controller.del(num);
-    ctx.body = {"ret":r};
+    ctx.body = JSON.stringify(r);
     ctx.type = 'json';
 };
 const ContentHandler = (controller : ContentAccessor) => async (ctx:Context, next:Next) => {
@@ -121,6 +130,7 @@ export const getContentRouter = (controller: ContentAccessor)=>{
     const ret = new Router();
     ret.get("/search",ContentQueryHandler(controller));
     ret.get("/:num(\\d+)",ContentIDHandler(controller));
+    ret.get("/:num(\\d+)",UpdateContentHandler(controller));
     ret.use("/:num(\\d+)/:content_type");
     ret.post("/",CreateContentHandler(controller));
     ret.get("/:num(\\d+)/tags",ContentTagIDHandler(controller));