docs: update use middleware

site/docs/middleware.md

@@ -317,6 +317,10 @@ export class MainConfiguration {
 这样的话，社区很多 koa 三方中间件都可以比较方便的接入。
 
 
+
+## 使用社区中间件
+
+
 我们以 `koa-static` 举例。
 
 
@@ -337,6 +341,49 @@ async onReady() {
 }
 ```
 
+如果中间件支持在路由上引入，比如：
+
+```typescript
+const Koa = require('koa');
+const app = new Koa();
+app.get('/controller', require('koa-static')(root, opts));
+```
+
+我们也可以将中间件看成普通函数，放在装饰器参数中。
+
+```typescript
+const staticMiddleware = require('koa-static')(root, opts);
+
+// ...
+class HomeController {
+  @Get('/controller', {middleware: [staticMiddleware]})
+  async getMethod() {
+    // ...
+  }
+}
+```
+
+也可以作为作为路由方法体使用。
+
+```typescript
+const staticMiddleware = require('koa-static')(root, opts);
+
+// ...
+class HomeController {
+  @Get('/controller')
+  async getMethod(ctx, next) {
+    // ...
+    return staticMiddleware(ctx, next);
+  }
+}
+```
+
+:::tip
+
+三方中间件写法有很多种，上面只是列出最基本的使用方式。
+
+:::
+
 
 
 ## 获取中间件名

site/i18n/en/docusaurus-plugin-content-docs/current/middleware.md

@@ -314,26 +314,73 @@ export class MainConfiguration {
 In this way, many koa tripartite middleware in the community can be easily accessed.
 
 
-Take `koa-static` as an example.
 
+## Use community middleware
 
-In the `koa-static` document, it is written as follows.
+
+Let's take `koa-static` as an example.
+
+
+In the `koa-static` documentation, it is written like this.
 
 ```typescript
 const Koa = require('koa');
 const app = new Koa();
 app.use(require('koa-static')(root, opts));
 ```
 
-Then, the `require('koa-static'))(root, opts)` is actually the returned middleware method. We can export it directly and call `useMiddleware`.
+Then, `require('koa-static')(root, opts)` is actually the returned middleware method, we can export it directly and call `useMiddleware`.
 
 ```typescript
 async onReady() {
-  // add middleware
-  this.app.useMiddleware(require('koa-static')(root, opts));
+   // add middleware
+   this.app.useMiddleware(require('koa-static')(root, opts));
 }
 ```
 
+If the middleware supports importing on routes, for example:
+
+```typescript
+const Koa = require('koa');
+const app = new Koa();
+app.get('/controller', require('koa-static')(root, opts));
+```
+
+We can also treat middleware as ordinary functions and place them in decorator parameters.
+
+```typescript
+const static Middleware = require('koa-static')(root, opts);
+
+//...
+class HomeController {
+   @Get('/controller', {middleware: [staticMiddleware]})
+   async getMethod() {
+     //...
+   }
+}
+```
+
+It can also be used as a routing method body.
+
+```typescript
+const static Middleware = require('koa-static')(root, opts);
+
+//...
+class HomeController {
+   @Get('/controller')
+   async getMethod(ctx, next) {
+     //...
+     return static Middleware(ctx, next);
+   }
+}
+```
+
+:::tip
+
+There are many ways to write three-party middleware, and the above are just the most basic ways to use it.
+
+:::
+
 
 
 ## Get the middleware name