sentinel support custom block response by sentinelClientHttpResponse

spring-cloud-alibaba-dependencies/pom.xml

@@ -146,6 +146,16 @@
                 <artifactId>sentinel-dubbo-api</artifactId>
                 <version>${project.version}</version>
             </dependency>
+            <dependency>
+                <groupId>com.alibaba.csp</groupId>
+                <artifactId>sentinel-cluster-server-default</artifactId>
+                <version>${sentinel.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.alibaba.csp</groupId>
+                <artifactId>sentinel-cluster-client-default</artifactId>
+                <version>${sentinel.version}</version>
+            </dependency>
 
 
             <!-- Aliyun OSS dependencies -->

spring-cloud-alibaba-docs/src/main/asciidoc-zh/sentinel.adoc

@@ -165,6 +165,7 @@ public RestTemplate restTemplate() {
 其中 `blockHandler` 或 `fallback` 对应的方法必须是对应 `blockHandlerClass` 或 `fallbackClass` 中的静态方法。
 
 该注解对应的方法参数跟 `ClientHttpRequestInterceptor` 接口中的参数一致，并多出了一个 `BlockException` 参数，且返回值是 `ClientHttpResponse`。
+被限流后如果不继续执行后面的 Http 请求拦截器，则可以通过 `SentinelClientHttpResponse` 的一个实例来自定义被限流后的返回值结果。
 
 比如上述 `ExceptionUtil` 的 `handleException` 方法对应的声明如下：
 

spring-cloud-alibaba-docs/src/main/asciidoc/sentinel.adoc

@@ -167,6 +167,7 @@ The parameter of the `@SentinelRestTemplate` annotation support flow control(`bl
 The `blockHandler` or `fallback` is the static method of `blockHandlerClass` or `fallbackClass`.
 
 The parameter of method in `@SentinelRestTemplate` is same as `ClientHttpRequestInterceptor`, but it has one more parameter `BlockException` and its value of return type should be `ClientHttpResponse`.
+If you do not continue to execute the following Http request interceptor after being restricted, you can use the instance of `SentinelClientHttpResponse` to customize the return value result after the current limit.
 
 The method signature of `handleException` in `ExceptionUtil` above should be like this:
 

spring-cloud-alibaba-sentinel/pom.xml

@@ -47,6 +47,16 @@
             <artifactId>sentinel-parameter-flow-control</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>com.alibaba.csp</groupId>
+            <artifactId>sentinel-cluster-server-default</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.alibaba.csp</groupId>
+            <artifactId>sentinel-cluster-client-default</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-alibaba-sentinel-datasource</artifactId>

spring-cloud-alibaba-sentinel/src/main/java/org/springframework/cloud/alibaba/sentinel/rest/SentinelClientHttpResponse.java

@@ -16,6 +16,13 @@
 
 package org.springframework.cloud.alibaba.sentinel.rest;
 
+import org.springframework.cloud.alibaba.sentinel.annotation.SentinelRestTemplate;
+import org.springframework.cloud.alibaba.sentinel.custom.SentinelProtectInterceptor;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.client.AbstractClientHttpResponse;
+
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
@@ -24,20 +31,21 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import org.springframework.cloud.alibaba.sentinel.annotation.SentinelRestTemplate;
-import org.springframework.cloud.alibaba.sentinel.custom.SentinelProtectInterceptor;
-import org.springframework.http.HttpHeaders;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
-import org.springframework.http.client.AbstractClientHttpResponse;
-
 /**
  * Using by {@link SentinelRestTemplate} and {@link SentinelProtectInterceptor}
+ *
  * @author <a href="mailto:fangjian0423@gmail.com">Jim</a>
  */
 public class SentinelClientHttpResponse extends AbstractClientHttpResponse {
 
-	private final String BLOCK_STR = "RestTemplate request block by sentinel";
+    private String blockResponse = "RestTemplate request block by sentinel";
+
+    public SentinelClientHttpResponse() {
+    }
+
+    public SentinelClientHttpResponse(String blockResponse) {
+        this.blockResponse = blockResponse;
+    }
 
     @Override
     public int getRawStatusCode() throws IOException {
@@ -46,7 +54,7 @@ public class SentinelClientHttpResponse extends AbstractClientHttpResponse {
 
     @Override
     public String getStatusText() throws IOException {
-		return BLOCK_STR;
+        return blockResponse;
     }
 
     @Override
@@ -56,7 +64,7 @@ public class SentinelClientHttpResponse extends AbstractClientHttpResponse {
 
     @Override
     public InputStream getBody() throws IOException {
-		return new ByteArrayInputStream(BLOCK_STR.getBytes());
+        return new ByteArrayInputStream(blockResponse.getBytes());
     }
 
     @Override