springcloud：Zuul动态网关demo源码案例演示

package cloud.node05.zuul.config; import com.netflix.hystrix.exception.HystrixTimeoutException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.client.ClientHttpResponse; import org.springframework.stereotype.Component; import java.io.ByteArrayInputStream; import java.io.InputStream; /** * 自定义服务降级策略 */ @Component public class FallBackConfig implements FallbackProvider { private static final Logger LOGGER = LoggerFactory.getLogger(FallBackConfig.class) ; @Override public ClientHttpResponse fallbackResponse(Throwable cause) { // 捕获超时异常，返回自定义信息 if (cause instanceof HystrixTimeoutException) { return response(HttpStatus.GATEWAY_TIMEOUT); } else { return fallbackResponse(); } } private ClientHttpResponse response(final HttpStatus status) { return new ClientHttpResponse() { @Override public HttpStatus getStatusCode() { return status; } @Override public int getRawStatusCode() { return status.value(); } @Override public String getStatusText() { return status.getReasonPhrase(); } @Override public void close() { LOGGER.info("close"); } @Override public InputStream getBody() { String message = "{\n" + "\"code\": 200,\n" + "\"message\": \"微服务飞出了地球\"\n" + "}"; return new ByteArrayInputStream(message.getBytes()); } @Override public HttpHeaders getHeaders() { HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_JSON); return headers; } }; } @Override public String getRoute() { return "*"; } @Override public ClientHttpResponse fallbackResponse() { return response(HttpStatus.INTERNAL_SERVER_ERROR); } }