实现 request body 重复读取的功能

src/main/java/cn/iocoder/dashboard/framework/web/config/WebConfiguration.java

@@ -1,5 +1,6 @@
 package cn.iocoder.dashboard.framework.web.config;
 
+import cn.iocoder.dashboard.framework.web.core.filter.RequestBodyCacheFilter;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -50,4 +51,13 @@ public class WebConfiguration implements WebMvcConfigurer {
         return new CorsFilter(source);
     }
 
+    /**
+     * 创建 RequestBodyCacheFilter Bean，可重复读取请求内容
+     */
+    @Bean
+    @Order(Integer.MIN_VALUE)
+    public RequestBodyCacheFilter requestBodyCacheFilter() {
+        return new RequestBodyCacheFilter();
+    }
+
 }

src/main/java/cn/iocoder/dashboard/framework/web/core/filter/RequestBodyCacheFilter.java

@@ -0,0 +1,35 @@
+package cn.iocoder.dashboard.framework.web.core.filter;
+
+import cn.hutool.core.util.StrUtil;
+import org.springframework.http.MediaType;
+import org.springframework.web.filter.OncePerRequestFilter;
+import org.springframework.web.util.ContentCachingRequestWrapper;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * Request Body 缓存 Filter，实现它的可重复读取
+ *
+ * 基于 Spring 提供的 {@link org.springframework.web.util.ContentCachingRequestWrapper} 实现
+ *
+ * @author 芋道源码
+ */
+public class RequestBodyCacheFilter extends OncePerRequestFilter {
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
+            throws IOException, ServletException {
+        filterChain.doFilter(new ContentCachingRequestWrapper(request), response);
+    }
+
+    @Override
+    protected boolean shouldNotFilter(HttpServletRequest request) {
+        // 只处理 json 请求内容
+        return !StrUtil.startWithIgnoreCase(request.getContentType(), MediaType.APPLICATION_JSON_VALUE);
+    }
+
+}