update 修改包名为org.dromara

ruoyi-gateway/src/main/java/org/dromara/gateway/utils/WebFluxUtils.java

@@ -0,0 +1,145 @@
+package org.dromara.gateway.utils;
+
+import cn.hutool.core.util.ObjectUtil;
+import org.dromara.common.core.domain.R;
+import org.dromara.common.core.utils.JsonUtils;
+import org.dromara.common.core.utils.StringUtils;
+import org.dromara.gateway.filter.GlobalCacheRequestFilter;
+import org.springframework.cloud.gateway.support.ServerWebExchangeUtils;
+import org.springframework.core.io.buffer.DataBuffer;
+import org.springframework.core.io.buffer.DataBufferUtils;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.http.server.reactive.ServerHttpResponse;
+import org.springframework.web.server.ServerWebExchange;
+import org.springframework.web.util.UriComponentsBuilder;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.net.URI;
+import java.nio.CharBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.LinkedHashSet;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Function;
+
+import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR;
+
+/**
+ * WebFlux 工具类
+ *
+ * @author Lion Li
+ */
+public class WebFluxUtils {
+
+    /**
+     * 获取原请求路径
+     */
+    public static String getOriginalRequestUrl(ServerWebExchange exchange) {
+        ServerHttpRequest request = exchange.getRequest();
+        LinkedHashSet<URI> uris = exchange.getAttributeOrDefault(GATEWAY_ORIGINAL_REQUEST_URL_ATTR, new LinkedHashSet<>());
+        URI requestUri = uris.stream().findFirst().orElse(request.getURI());
+        return UriComponentsBuilder.fromPath(requestUri.getRawPath()).build().toUriString();
+    }
+
+    /**
+     * 是否是Json请求
+     *
+     * @param exchange HTTP请求
+     */
+    public static boolean isJsonRequest(ServerWebExchange exchange) {
+        String header = exchange.getRequest().getHeaders().getFirst(HttpHeaders.CONTENT_TYPE);
+        return StringUtils.startsWithIgnoreCase(header, MediaType.APPLICATION_JSON_VALUE);
+    }
+
+    /**
+     * 读取request内的body
+     *
+     * 注意一个request只能读取一次 读取之后需要重新包装
+     */
+    public static String resolveBodyFromRequest(ServerHttpRequest serverHttpRequest) {
+        // 获取请求体
+        Flux<DataBuffer> body = serverHttpRequest.getBody();
+        AtomicReference<String> bodyRef = new AtomicReference<>();
+        body.subscribe(buffer -> {
+            CharBuffer charBuffer = StandardCharsets.UTF_8.decode(buffer.asByteBuffer());
+            DataBufferUtils.release(buffer);
+            bodyRef.set(charBuffer.toString());
+        });
+        return bodyRef.get();
+    }
+
+    /**
+     * 从缓存中读取request内的body
+     *
+     * 注意要求经过 {@link ServerWebExchangeUtils#cacheRequestBody(ServerWebExchange, Function)} 此方法创建缓存
+     * 框架内已经使用 {@link GlobalCacheRequestFilter} 全局创建了body缓存
+     *
+     * @return body
+     */
+    public static String resolveBodyFromCacheRequest(ServerWebExchange exchange) {
+        Object obj = exchange.getAttributes().get(ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR);
+        if (ObjectUtil.isNull(obj)) {
+            return null;
+        }
+        DataBuffer buffer = (DataBuffer) obj;
+        CharBuffer charBuffer = StandardCharsets.UTF_8.decode(buffer.asByteBuffer());
+        return charBuffer.toString();
+    }
+
+    /**
+     * 设置webflux模型响应
+     *
+     * @param response ServerHttpResponse
+     * @param value    响应内容
+     * @return Mono<Void>
+     */
+    public static Mono<Void> webFluxResponseWriter(ServerHttpResponse response, Object value) {
+        return webFluxResponseWriter(response, HttpStatus.OK, value, R.FAIL);
+    }
+
+    /**
+     * 设置webflux模型响应
+     *
+     * @param response ServerHttpResponse
+     * @param code     响应状态码
+     * @param value    响应内容
+     * @return Mono<Void>
+     */
+    public static Mono<Void> webFluxResponseWriter(ServerHttpResponse response, Object value, int code) {
+        return webFluxResponseWriter(response, HttpStatus.OK, value, code);
+    }
+
+    /**
+     * 设置webflux模型响应
+     *
+     * @param response ServerHttpResponse
+     * @param status   http状态码
+     * @param code     响应状态码
+     * @param value    响应内容
+     * @return Mono<Void>
+     */
+    public static Mono<Void> webFluxResponseWriter(ServerHttpResponse response, HttpStatus status, Object value, int code) {
+        return webFluxResponseWriter(response, MediaType.APPLICATION_JSON_VALUE, status, value, code);
+    }
+
+    /**
+     * 设置webflux模型响应
+     *
+     * @param response    ServerHttpResponse
+     * @param contentType content-type
+     * @param status      http状态码
+     * @param code        响应状态码
+     * @param value       响应内容
+     * @return Mono<Void>
+     */
+    public static Mono<Void> webFluxResponseWriter(ServerHttpResponse response, String contentType, HttpStatus status, Object value, int code) {
+        response.setStatusCode(status);
+        response.getHeaders().add(HttpHeaders.CONTENT_TYPE, contentType);
+        R<?> result = R.fail(code, value.toString());
+        DataBuffer dataBuffer = response.bufferFactory().wrap(JsonUtils.toJsonString(result).getBytes());
+        return response.writeWith(Mono.just(dataBuffer));
+    }
+}