halo/docs/extension-points/authentication.md

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# Halo 认证扩展点
此前Halo 提供了 AdditionalWebFilter 作为扩展点供插件扩展认证相关的功能。但是近期我们明确了 AdditionalWebFilter
的使用用途,故不再作为认证的扩展点。
目前Halo 提供了三种认证扩展点:表单登录认证、普通认证和匿名认证。
## 表单登录FormLogin
示例如下:
```java
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;
import run.halo.app.security.FormLoginSecurityWebFilter;
@Component
public class MyFormLoginSecurityWebFilter implements FormLoginSecurityWebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
// Do your logic here
return chain.filter(exchange);
}
}
```
## 普通认证Authentication
示例如下:
```java
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;
import run.halo.app.security.AuthenticationSecurityWebFilter;
@Component
public class MyAuthenticationSecurityWebFilter implements AuthenticationSecurityWebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
// Do your logic here
return chain.filter(exchange);
}
}
```
## 匿名认证Anonymous Authentication
示例如下:
```java
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;
import run.halo.app.security.AnonymousAuthenticationSecurityWebFilter;
@Component
public class MyAnonymousAuthenticationSecurityWebFilter
implements AnonymousAuthenticationSecurityWebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
// Do your logic here
return chain.filter(exchange);
}
}
```
## 前置过滤器BeforeSecurityWebFilter
主要用于在进行认证之前的一些处理。需要注意的是,当前过滤器中无法直接通过 ReactiveSecurityContextHolder 获取
SecurityContext。示例如下
```java
public class MyBeforeSecurityWebFilter implements BeforeSecurityWebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
// Do your logic here
return chain.filter(exchange);
}
}
```
## 后置过滤器AfterSecurityWebFilter
主要用于进行认证之后的一些处理。在当前过滤器中,可以通过 ReactiveSecurityContextHolder 获取 SecurityContext。示例如下
```java
public class MyAfterSecurityWebFilter implements AfterSecurityWebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
return ReactiveSecurityContextHolder.getContext()
.switchIfEmpty(Mono.defer(() -> {
// do something...
return chain.filter(exchange).then(Mono.empty());
}))
.flatMap(securityContext -> {
// do something...
return chain.filter(exchange);
});
}
}
```
---
我们在实现扩展点的时候需要注意:如果当前请求不满足认证条件,请一定要调用 `chain.filter(exchange)`,给其他 filter 留下机会。
后续会根据需求实现其他认证相关的扩展点。