package com.bolt.gateway.handler; import com.bolt.gateway.provider.ResponseProvider; import org.springframework.boot.autoconfigure.web.ErrorProperties; import org.springframework.boot.autoconfigure.web.ResourceProperties; import org.springframework.boot.autoconfigure.web.reactive.error.DefaultErrorWebExceptionHandler; import org.springframework.boot.web.reactive.error.ErrorAttributes; import org.springframework.cloud.gateway.support.NotFoundException; import org.springframework.context.ApplicationContext; import org.springframework.http.HttpStatus; import org.springframework.web.reactive.function.server.*; import org.springframework.web.server.ResponseStatusException; import java.util.Map; /** * 异常处理 * * @author arch_group */ public class ErrorExceptionHandler extends DefaultErrorWebExceptionHandler { public ErrorExceptionHandler(ErrorAttributes errorAttributes, ResourceProperties resourceProperties, ErrorProperties errorProperties, ApplicationContext applicationContext) { super(errorAttributes, resourceProperties, errorProperties, applicationContext); } /** * 获取异常属性 */ @Override protected Map<String, Object> getErrorAttributes(ServerRequest request, boolean includeStackTrace) { int code = 500; Throwable error = super.getError(request); if (error instanceof NotFoundException) { code = 404; } if (error instanceof ResponseStatusException) { code = ((ResponseStatusException) error).getStatus().value(); } return ResponseProvider.response(code, this.buildMessage(request, error)); } /** * 指定响应处理方法为JSON处理的方法 * * @param errorAttributes */ @Override protected RouterFunction<ServerResponse> getRoutingFunction(ErrorAttributes errorAttributes) { return RouterFunctions.route(RequestPredicates.all(), this::renderErrorResponse); } /** * 根据code获取对应的HttpStatus * * @param errorAttributes */ @Override protected HttpStatus getHttpStatus(Map<String, Object> errorAttributes) { int statusCode = (int) errorAttributes.get("code"); return HttpStatus.valueOf(statusCode); } /** * 构建异常信息 * * @param request * @param ex * @return */ private String buildMessage(ServerRequest request, Throwable ex) { StringBuilder message = new StringBuilder("Failed to handle request ["); message.append(request.methodName()); message.append(" "); message.append(request.uri()); message.append("]"); if (ex != null) { message.append(": "); message.append(ex.getMessage()); } return message.toString(); } }