一、错误页面优化
实现UrlBlockHandler
接口,提供异常处理
package com.uos.contentcenter.sentineltest;
import com.alibaba.csp.sentinel.adapter.servlet.callback.UrlBlockHandler;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.csp.sentinel.slots.block.authority.AuthorityException;
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeException;
import com.alibaba.csp.sentinel.slots.block.flow.FlowException;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowException;
import com.alibaba.csp.sentinel.slots.system.SystemBlockException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.stereotype.Component;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* @author 太子殿下
* @date 2020/3/29 11:43
*/
@Component
public class MyUrlBlockHandler implements UrlBlockHandler {
private ErrorMsg msg = null;
@Override
public void blocked(HttpServletRequest httpServletRequest, HttpServletResponse response, BlockException ex) throws IOException {
if (ex instanceof FlowException){
msg = ErrorMsg.builder()
.status(100)
.msg("限流了")
.build();
}
else if (ex instanceof DegradeException){
msg = ErrorMsg.builder()
.status(101)
.msg("降级了")
.build();
}
else if (ex instanceof ParamFlowException){
msg = ErrorMsg.builder()
.status(102)
.msg("热点参数限流了")
.build();
}
else if (ex instanceof SystemBlockException){
msg = ErrorMsg.builder()
.status(103)
.msg("系统规则(负载/...不满足要求)")
.build();
}
else if (ex instanceof AuthorityException){
msg = ErrorMsg.builder()
.status(104)
.msg("授权规则不通过")
.build();
}
// http状态码
response.setStatus(500);
response.setCharacterEncoding("utf-8");
response.setHeader("Content-Type","application/json;charset=utf-8");
response.setContentType("application/json;charset=utf-8");
// Spring MVC自带的json操作工具jackson
new ObjectMapper()
.writeValue(response.getWriter(),msg);
}
}
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
class ErrorMsg{
private Integer status;
private String msg;
}
设置限流规则,将出现如下的结果。
二、实现区分来源
实现RequestOriginParser
接口
package com.uos.contentcenter.sentineltest;
import com.alibaba.csp.sentinel.adapter.servlet.callback.RequestOriginParser;
import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Component;
import javax.servlet.http.HttpServletRequest;
/**
* @author 太子殿下
* @date 2020/3/29 13:08
*/
@Component
public class MyRequestOriginParser implements RequestOriginParser {
@Override
public String parseOrigin(HttpServletRequest request) {
// 从请求参数中获取名为origin的参数并返回
// 如果获取不到origin参数就抛异常
String origin = request.getParameter("origin");
if (StringUtils.isBlank(origin)){
throw new IllegalArgumentException("origin must be specified");
}
return origin;
}
}
新增授权规则
三、RESTful URL支持
实现UrlCleaner
接口,重新定义资源名称
package com.uos.contentcenter.sentineltest;
import com.alibaba.csp.sentinel.adapter.servlet.callback.UrlCleaner;
import org.apache.commons.lang.math.NumberUtils;
import org.springframework.stereotype.Component;
import java.util.Arrays;
/**
* @author 太子殿下
* @date 2020/3/29 13:40
*/
@Component
public class MyUrlCleaner implements UrlCleaner {
@Override
public String clean(String originUrl) {
// 让/shares/1与/shares/2返回值相同
// 返回/shares/{number}
String[] split = originUrl.split("/");
return Arrays.stream(split)
.map(string -> {
if (NumberUtils.isNumber(string)){
return "{number}";
}
return string;
})
.reduce((a,b) -> a + "/" + b)
.orElse("");
}
}