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Update middleware.md
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# 中间件
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# Middleware
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## 如何注册中间件?
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## How to register middleware?
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中间件的注册方法一般写在 load 方法里
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The registration method for middleware is usually written in the load method
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```ts
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export class MyPlugin extends Plugin {
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@ -14,13 +14,13 @@ export class MyPlugin extends Plugin {
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}
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```
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说明:
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Notes.
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1. `app.acl.use()` 添加资源权限级中间件,在权限判断之前执行
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2. `app.resourcer.use()` 添加资源级中间件,只有请求已定义的 resource 时才执行
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3. `app.use()` 添加应用级中间件,每次请求都执行
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1. `app.acl.use()` Add a resource-permission-level middleware to be executed before permission determination
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2. `app.resourcer.use()` Adds a resource-level middleware that is executed only when a defined resource is requested
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3. `app.use()` Add an application-level middleware to be executed on every request
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## 洋葱圈模型
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## Onion Circle Model
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```ts
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app.use(async (ctx, next) => {
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@ -38,45 +38,45 @@ app.use(async (ctx, next) => {
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});
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```
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访问 http://localhost:13000/api/hello 查看,浏览器响应的数据是:
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Visit http://localhost:13000/api/hello to see that the browser responds with the following data
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```js
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{"data": [1,3,4,2]}
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```
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## 内置中间件及执行顺序
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## Built-in middlewares and execution order
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1. `cors`
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2. `bodyParser`
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3. `i18n`
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4. `dataWrapping`
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5. `db2resource`
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6. `restApi`
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1. `parseToken`
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5. `db2resource` 6.
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6. `restApi` 1.
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1. `parseToken` 2.
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2. `checkRole`
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3. `acl`
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1. `acl.use()` 添加的其他中间件
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4. `resourcer.use()` 添加的其他中间件
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5. action handler
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7. `app.use()` 添加的其他中间件
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3. `acl` 1.
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1. `acl.use()` Additional middleware added
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4. `resourcer.use()` Additional middleware added
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5. `action handler`
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7. `app.use()` Additional middleware added
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也可以使用 `before` 或 `after` 将中间件插入到前面的某个 `tag` 标记的位置,如:
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You can also use `before` or `after` to insert the middleware into the location of one of the preceding `tag`, e.g.
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```ts
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app.use(m1, { tag: 'restApi' });
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app.resourcer.use(m2, { tag: 'parseToken' });
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app.resourcer.use(m3, { tag: 'checkRole' });
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// m4 将排在 m1 前面
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// m4 will come before m1
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app.use(m4, { before: 'restApi' });
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// m5 会插入到 m2 和 m3 之间
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// m5 will be inserted between m2 and m3
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app.resourcer.use(m5, { after: 'parseToken', before: 'checkRole' });
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```
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如果未特殊指定位置,新增的中间件的执行顺序是:
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If no location is specifically specified, the order of execution of the added middlewares is
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1. 优先执行 acl.use 添加的,
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2. 然后是 resourcer.use 添加的,包括 middleware handler 和 action handler,
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3. 最后是 app.use 添加的。
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1. middlewares added by `acl.use` will be executed first
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2. then the ones added by `resourcer.use`, including the middleware handler and action handler
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3. and finally the ones added by `app.use`
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```ts
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app.use(async (ctx, next) => {
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@ -113,19 +113,19 @@ app.resourcer.define({
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});
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```
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访问 http://localhost:13000/api/hello 查看,浏览器响应的数据是:
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Visit http://localhost:13000/api/hello to see that the browser responds with the data
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```js
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{"data": [1,2]}
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```
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访问 http://localhost:13000/api/test:list 查看,浏览器响应的数据是:
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Visiting http://localhost:13000/api/test:list to see, the browser responds with the following data
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```js
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{"data": [5,3,7,1,2,8,4,6]}
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```
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### resource 未定义,不执行 resourcer.use() 添加的中间件
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### Resource undefined, middlewares added by resourcer.use() will not be executed
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```ts
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app.use(async (ctx, next) => {
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@ -143,18 +143,18 @@ app.resourcer.use(async (ctx, next) => {
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});
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```
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访问 http://localhost:13000/api/hello 查看,浏览器响应的数据是:
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Visit http://localhost:13000/api/hello to see that the browser responds with the following data
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```js
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{"data": [1,2]}
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```
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以上示例,hello 资源未定义,不会进入 resourcer,所以就不会执行 resourcer 里的中间件
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In the above example, the hello resource is not defined and will not enter the resourcer, so the middleware in the resourcer will not be executed
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## 中间件用途
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## Middleware Usage
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待补充
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TODO
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## 示例
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## Example
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- [samples/ratelimit](https://github.com/nocobase/nocobase/blob/main/packages/samples/ratelimit/) IP rate-limiting
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