mirror of
https://github.com/nocobase/nocobase
synced 2024-11-15 21:37:15 +00:00
161 lines
3.6 KiB
Markdown
161 lines
3.6 KiB
Markdown
# Middleware
|
|
|
|
## How to register middleware?
|
|
|
|
The registration method for middleware is usually written in the load method
|
|
|
|
```ts
|
|
export class MyPlugin extends Plugin {
|
|
load() {
|
|
this.app.acl.use();
|
|
this.app.resourcer.use();
|
|
this.app.use();
|
|
}
|
|
}
|
|
```
|
|
|
|
Notes.
|
|
|
|
1. `app.acl.use()` Add a resource-permission-level middleware to be executed before permission determination
|
|
2. `app.resourcer.use()` Adds a resource-level middleware that is executed only when a defined resource is requested
|
|
3. `app.use()` Add an application-level middleware to be executed on every request
|
|
|
|
## Onion Circle Model
|
|
|
|
```ts
|
|
app.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(1);
|
|
await next();
|
|
ctx.body.push(2);
|
|
});
|
|
|
|
app.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(3);
|
|
await next();
|
|
ctx.body.push(4);
|
|
});
|
|
```
|
|
|
|
Visit http://localhost:13000/api/hello to see that the browser responds with the following data
|
|
|
|
```js
|
|
{"data": [1,3,4,2]}
|
|
```
|
|
|
|
## Built-in middlewares and execution order
|
|
|
|
1. `cors`
|
|
2. `bodyParser`
|
|
3. `i18n`
|
|
4. `dataWrapping`
|
|
5. `db2resource` 6.
|
|
6. `restApi` 1.
|
|
1. `parseToken` 2.
|
|
2. `checkRole`
|
|
3. `acl` 1.
|
|
1. `acl.use()` Additional middleware added
|
|
4. `resourcer.use()` Additional middleware added
|
|
5. `action handler`
|
|
7. `app.use()` Additional middleware added
|
|
|
|
You can also use `before` or `after` to insert the middleware into the location of one of the preceding `tag`, e.g.
|
|
|
|
```ts
|
|
app.use(m1, { tag: 'restApi' });
|
|
app.resourcer.use(m2, { tag: 'parseToken' });
|
|
app.resourcer.use(m3, { tag: 'checkRole' });
|
|
// m4 will come before m1
|
|
app.use(m4, { before: 'restApi' });
|
|
// m5 will be inserted between m2 and m3
|
|
app.resourcer.use(m5, { after: 'parseToken', before: 'checkRole' });
|
|
```
|
|
|
|
If no location is specifically specified, the order of execution of the added middlewares is
|
|
|
|
1. middlewares added by `acl.use` will be executed first
|
|
2. then the ones added by `resourcer.use`, including the middleware handler and action handler
|
|
3. and finally the ones added by `app.use`
|
|
|
|
```ts
|
|
app.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(1);
|
|
await next();
|
|
ctx.body.push(2);
|
|
});
|
|
|
|
app.resourcer.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(3);
|
|
await next();
|
|
ctx.body.push(4);
|
|
});
|
|
|
|
app.acl.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(5);
|
|
await next();
|
|
ctx.body.push(6);
|
|
});
|
|
|
|
app.resourcer.define({
|
|
name: 'test',
|
|
actions: {
|
|
async list(ctx, next) {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(7);
|
|
await next();
|
|
ctx.body.push(8);
|
|
},
|
|
},
|
|
});
|
|
```
|
|
|
|
Visit http://localhost:13000/api/hello to see that the browser responds with the data
|
|
|
|
```js
|
|
{"data": [1,2]}
|
|
```
|
|
|
|
Visiting http://localhost:13000/api/test:list to see, the browser responds with the following data
|
|
|
|
```js
|
|
{"data": [5,3,7,1,2,8,4,6]}
|
|
```
|
|
|
|
### Resource undefined, middlewares added by resourcer.use() will not be executed
|
|
|
|
```ts
|
|
app.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(1);
|
|
await next();
|
|
ctx.body.push(2);
|
|
});
|
|
|
|
app.resourcer.use(async (ctx, next) => {
|
|
ctx.body = ctx.body || [];
|
|
ctx.body.push(3);
|
|
await next();
|
|
ctx.body.push(4);
|
|
});
|
|
```
|
|
|
|
Visit http://localhost:13000/api/hello to see that the browser responds with the following data
|
|
|
|
```js
|
|
{"data": [1,2]}
|
|
```
|
|
|
|
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
|
|
|
|
## Middleware Usage
|
|
|
|
TODO
|
|
|
|
## Example
|
|
|
|
- [samples/ratelimit](https://github.com/nocobase/nocobase/blob/main/packages/samples/ratelimit/) IP rate-limiting
|