From 0586f3958ee7e7b2bf9be90911b3eb3c8b8494b2 Mon Sep 17 00:00:00 2001
From: pig666 <pig666@qq.com>
Date: Sun, 24 May 2020 19:43:34 +0800
Subject: [PATCH] =?UTF-8?q?:sparkles:=20Introducing=20new=20features.=20#1?=
 =?UTF-8?q?279=20Spring=20Cloud=20Gateway=20=E5=85=A8=E5=B1=80=E9=80=9A?=
 =?UTF-8?q?=E7=94=A8=E5=BC=82=E5=B8=B8=E5=A4=84=E7=90=86?=
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---
 .../GlobalExceptionConfiguration.java         | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 pigx-common/pigx-common-gateway/src/main/java/com/pig4cloud/pigx/common/gateway/configuration/GlobalExceptionConfiguration.java

diff --git a/pigx-common/pigx-common-gateway/src/main/java/com/pig4cloud/pigx/common/gateway/configuration/GlobalExceptionConfiguration.java b/pigx-common/pigx-common-gateway/src/main/java/com/pig4cloud/pigx/common/gateway/configuration/GlobalExceptionConfiguration.java
new file mode 100644
index 000000000..cf154bfa0
--- /dev/null
+++ b/pigx-common/pigx-common-gateway/src/main/java/com/pig4cloud/pigx/common/gateway/configuration/GlobalExceptionConfiguration.java
@@ -0,0 +1,57 @@
+package com.pig4cloud.pigx.common.gateway.configuration;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.pig4cloud.pigx.common.core.util.R;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
+import org.springframework.core.io.buffer.DataBufferFactory;
+import org.springframework.http.MediaType;
+import org.springframework.http.server.reactive.ServerHttpResponse;
+import org.springframework.web.server.ResponseStatusException;
+import org.springframework.web.server.ServerWebExchange;
+import reactor.core.publisher.Mono;
+
+/**
+ * @author lengleng
+ * @date 2020/5/23
+ * <p>
+ * 网关异常通用处理器，只作用在webflux 环境下 , 优先级低于 {@link ResponseStatusExceptionHandler} 执行
+ */
+@Slf4j
+@Order(-1)
+@Configuration
+@RequiredArgsConstructor
+public class GlobalExceptionConfiguration implements ErrorWebExceptionHandler {
+	private final ObjectMapper objectMapper;
+
+	@Override
+	public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
+		ServerHttpResponse response = exchange.getResponse();
+
+		if (response.isCommitted()) {
+			return Mono.error(ex);
+		}
+
+		// header set
+		response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
+		if (ex instanceof ResponseStatusException) {
+			response.setStatusCode(((ResponseStatusException) ex).getStatus());
+		}
+
+		return response
+				.writeWith(Mono.fromSupplier(() -> {
+					DataBufferFactory bufferFactory = response.bufferFactory();
+					try {
+						return bufferFactory.wrap(objectMapper.writeValueAsBytes(R.failed(ex.getMessage())));
+					} catch (JsonProcessingException e) {
+						log.warn("Error writing response", ex);
+						return bufferFactory.wrap(new byte[0]);
+					}
+				}));
+	}
+
+}