3-6 Service fault tolerance sentinel-4 authorization rules

1 Brief description of authorization rules

Whitelist users use requests to distinguish sources such as different services, apps or pcs.

2 Case simulation

2.1 Add custom source processing rules under config, need to implement RequsetOriginParser

@Component
public class MyRequestOriginParser implements RequestOriginParser {
    /**
     * 区分来源：本质通过request域获取来源标识
     * 根据不同来源如app/pc，最后返回结果值交给sentinel流控匹配处理
     */
    @Override
    public String parseOrigin(HttpServletRequest request) {
        String servName = request.getParameter("servName");
        // 这个不是授权规则必须的判断
        if (StringUtils.isEmpty(servName)) {
            throw new RuntimeException("servName不能为空");
        }
        return servName;
    }
}

2.2 Console

Before setting rules

访问`http://localhost:8091/sentinel/highConcurrency?servName=pc`，正常返回
访问`http://localhost:8091/sentinel/highConcurrency?servName=app`，正常返回

Set the whitelist value of the resource/sentinel/highConcurrency to pc, and then test

访问`http://localhost:8091/sentinel/highConcurrency?servName=pc`，正常返回
访问`http://localhost:8091/sentinel/highConcurrency?servName=app`，提示限流
ghConcurrency?servName=app`，提示限流