diff --git a/src/content/mod.ts b/src/content/mod.ts
index db96484..6bebf16 100644
--- a/src/content/mod.ts
+++ b/src/content/mod.ts
@@ -1 +1,3 @@
+import './manga';
+import './video';
 export {ContentReferrer,createContentReferrer} from './referrer';
\ No newline at end of file
diff --git a/src/content/referrer.ts b/src/content/referrer.ts
index fada096..32e8146 100644
--- a/src/content/referrer.ts
+++ b/src/content/referrer.ts
@@ -37,8 +37,14 @@ export const createDefaultClass = (type:string):ContentReferrerConstructor=>{
 }
 let ContstructorTable:{[k:string]:ContentReferrerConstructor} = {};
 export function registerContentReferrer(s: ContentReferrerConstructor){
+    console.log(`registered content type: ${s.content_type}`)
     ContstructorTable[s.content_type] = s;
 }
 export function createContentReferrer(type:string,path:string,desc?:object){
-    return new ContstructorTable[type](path,desc);
+    const constructorMethod = ContstructorTable[type];
+    if(constructorMethod === undefined){
+        console.log(type);
+        throw new Error("undefined");
+    }
+    return new constructorMethod(path,desc);
 }
\ No newline at end of file
diff --git a/src/model/contents.ts b/src/model/contents.ts
index b3d32eb..823489e 100644
--- a/src/model/contents.ts
+++ b/src/model/contents.ts
@@ -7,7 +7,7 @@ export interface ContentContent{
     content_type    : string,
     basepath        : string,
     filename        : string,
-    thumbnail?      : string,
+    hash?           : string,
     additional      : object,
     tags            : string[],//eager loading 
 }
@@ -17,6 +17,7 @@ export const MetaContentContent = {
     content_type  : "string",
     basepath      : "string",
     filename      : "string",
+    hash          : "string",
     additional    : "object",
     tags          : "string[]",
 }
diff --git a/src/route/all.ts b/src/route/all.ts
index dc22c53..1237c03 100644
--- a/src/route/all.ts
+++ b/src/route/all.ts
@@ -15,6 +15,7 @@ const all_middleware = (cont: string|undefined, restarg: string|undefined)=>asyn
         return;
     }
     if(ctx.state.content.type != cont){
+        console.error("not matched")
         ctx.status = 404;
         return;
     }
@@ -26,7 +27,6 @@ const all_middleware = (cont: string|undefined, restarg: string|undefined)=>asyn
     const rest = "/"+(restarg as string|undefined || "");
 
     const result = router.match(rest,"GET");
-    console.log(`s : ${result.pathAndMethod}`);
     if(!result.route){
         return await next();
     }
@@ -46,11 +46,9 @@ export class AllContentRouter extends Router<ContentContext>{
     constructor(){
         super();
         this.get('/:content_type',async (ctx,next)=>{
-            console.log("no x");
             return await (all_middleware(ctx.params["content_type"],undefined))(ctx,next);
         });
         this.get('/:content_type/:rest(.*)', async (ctx,next) => {
-            console.log("yes x");
             const cont = ctx.params["content_type"] as string;
             return await (all_middleware(cont,ctx.params["rest"]))(ctx,next);
         });
diff --git a/src/route/contents.ts b/src/route/contents.ts
index c7c892c..b995cce 100644
--- a/src/route/contents.ts
+++ b/src/route/contents.ts
@@ -4,7 +4,7 @@ import {Content, ContentAccessor, isContentContent} from './../model/contents';
 import {QueryListOption} from './../model/contents';
 import {ParseQueryNumber, ParseQueryArray, ParseQueryBoolean} from './util'
 import {sendError} from './error_handler';
-import { createContentReferrer } from '../content/referrer';
+import { createContentReferrer } from '../content/mod';
 import { join } from 'path';
 import {AllContentRouter} from './all';
 
diff --git a/src/route/context.ts b/src/route/context.ts
index f810743..9ca6268 100644
--- a/src/route/context.ts
+++ b/src/route/context.ts
@@ -1,4 +1,4 @@
-import {ContentReferrer} from '../content/referrer';
+import {ContentReferrer} from '../content/mod';
 
 export interface ContentContext{
     content:ContentReferrer
diff --git a/src/route/manga.ts b/src/route/manga.ts
index 44ef2b7..610baf2 100644
--- a/src/route/manga.ts
+++ b/src/route/manga.ts
@@ -78,6 +78,9 @@ export class MangaRouter extends Router<ContentContext>{
             const page = Number.parseInt(ctx.params['page']);
             await renderZipImage(ctx,ctx.state.content.path,page);
         });
+        this.get("/thumbnail", async (ctx,next)=>{
+            await renderZipImage(ctx,ctx.state.content.path,0);
+        });
     }
 }
 
diff --git a/src/route/video.ts b/src/route/video.ts
index 8638085..c859384 100644
--- a/src/route/video.ts
+++ b/src/route/video.ts
@@ -59,6 +59,9 @@ export class VideoRouter extends Router<ContentContext>{
         this.get("/", async (ctx,next)=>{
             await renderVideo(ctx,ctx.state.content.path);
         });
+        this.get("/thumbnail", async (ctx,next)=>{
+            await renderVideo(ctx,ctx.state.content.path);
+        })
     }
 }
 
diff --git a/src/server.ts b/src/server.ts
index bc40b31..ec6b48a 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -1,5 +1,5 @@
-import Koa, { DefaultState } from 'koa';
-import Router, { IParamMiddleware, IRouterParamContext } from 'koa-router';
+import Koa from 'koa';
+import Router from 'koa-router';
 
 import {get_setting} from './setting';
 import {connectDB} from './database';
@@ -10,11 +10,6 @@ import getContentRouter from './route/contents';
 import { createKnexContentsAccessor } from './db/contents';
 import bodyparser from 'koa-bodyparser';
 import {error_handler} from './route/error_handler';
-import {MangaReferrer} from './content/manga';
-import {VideoReferrer} from './content/video';
-
-import { ContentContext } from './route/context';
-import { AllContentRouter } from './route/all';
 
 //let Koa = require("koa");
 async function main(){
@@ -39,6 +34,7 @@ async function main(){
     });
     router.get('/dist/js/bundle.js',async (ctx,next)=>{
         ctx.type = "js";
+        //ctx.set("","");
         ctx.body = createReadStream("dist/js/bundle.js");
     });
     router.get('/get'
@@ -51,17 +47,7 @@ async function main(){
     let content_router = getContentRouter(createKnexContentsAccessor(db));
     router.use('/content',content_router.routes());
     router.use('/content',content_router.allowedMethods());
-    let ctnrouter = new AllContentRouter();
-    router.all('/image/(.*)', async (ctx,next)=>{
-        ctx.state['content'] = new MangaReferrer("testdata/test_zip.zip");
-        await next();
-    });
-    router.use('/image',ctnrouter.routes());
-    router.all('/ss/(.*)', async (ctx,next)=>{
-        ctx.state['content'] = new VideoReferrer("testdata/video_test.mp4");
-        await next();
-    });
-    router.use('/ss',ctnrouter.routes());
+    
     let mm_count=0;
     app.use(async (ctx,next)=>{
         console.log(`==========================${mm_count++}`);