feat: gateway增加将query参数中带版本号的参数设置到header中

zlt-gateway/sc-gateway/src/main/java/com/central/gateway/filter/VersionLbIsolationFilter.java

+package com.central.gateway.filter;
+
+import com.central.common.constant.CommonConstant;
+import com.central.common.constant.ConfigConstants;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.cloud.gateway.filter.GatewayFilterChain;
+import org.springframework.cloud.gateway.filter.GlobalFilter;
+import org.springframework.core.Ordered;
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.stereotype.Component;
+import org.springframework.web.server.ServerWebExchange;
+import reactor.core.publisher.Mono;
+
+import java.util.List;
+
+/**
+ * 示例
+ *
+ * @author jarvis create by 2022/5/8
+ */
+@Component
+public class VersionLbIsolationFilter implements GlobalFilter, Ordered {
+
+    @Value("${"+ ConfigConstants.CONFIG_LOADBALANCE_ISOLATION_ENABLE+":}")
+    private Boolean enableVersionControl;
+
+    @Override
+    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
+        if(Boolean.TRUE.equals(enableVersionControl)
+                && exchange.getRequest().getQueryParams().containsKey(CommonConstant.Z_L_T_VERSION)){
+            String version = exchange.getRequest().getQueryParams().get(CommonConstant.Z_L_T_VERSION).get(0);
+            ServerHttpRequest rebuildRequest = exchange.getRequest().mutate().headers(header -> {
+                header.add(CommonConstant.Z_L_T_VERSION, version);
+            }).build();
+            ServerWebExchange rebuildServerWebExchange = exchange.mutate().request(rebuildRequest).build();
+            return chain.filter(rebuildServerWebExchange);
+        }
+        return chain.filter(exchange);
+    }
+
+    @Override
+    public int getOrder() {
+        return Ordered.HIGHEST_PRECEDENCE;
+    }
+}