feat: support command agent with asm on filterChain and contextValve (#51)

2026-09-22 23:11:52 +08:00 · 2025-03-30 15:33:31 +08:00
parent db579ce39e
commit dd4832a5a8
47 changed files with 1060 additions and 46 deletions
@@ -0,0 +1,70 @@
+package com.reajason.javaweb.asm;
+
+import lombok.Getter;
+import net.bytebuddy.jar.asm.ClassReader;
+import net.bytebuddy.jar.asm.ClassVisitor;
+import net.bytebuddy.jar.asm.Opcodes;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashSet;
+import java.util.Set;
+
+public class InnerClassDiscovery {
+
+    /**
+     * Discovers all inner classes for a given class
+     *
+     * @param originalClass The class to discover inner classes for
+     * @return A set of fully qualified inner class names
+     */
+    public static Set<String> findAllInnerClasses(Class<?> originalClass) throws IOException {
+        Set<String> innerClasses;
+        String resourceName = originalClass.getName().replace('.', '/') + ".class";
+        try (InputStream is = originalClass.getClassLoader().getResourceAsStream(resourceName)) {
+            if (is == null) {
+                throw new IOException("Could not find class file for " + originalClass.getName());
+            }
+
+            ClassReader reader = new ClassReader(is);
+            InnerClassCollector collector = new InnerClassCollector(originalClass.getName());
+            reader.accept(collector, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
+
+            innerClasses = new HashSet<>(collector.getInnerClasses());
+        }
+        try {
+            for (Class<?> innerClass : originalClass.getDeclaredClasses()) {
+                innerClasses.add(innerClass.getName());
+                innerClasses.addAll(findAllInnerClasses(innerClass));
+            }
+        } catch (SecurityException ignored) {
+        }
+
+        return innerClasses;
+    }
+
+    private static class InnerClassCollector extends ClassVisitor {
+        private final String originalClassName;
+        @Getter
+        private final Set<String> innerClasses = new HashSet<>();
+
+        public InnerClassCollector(String originalClassName) {
+            super(Opcodes.ASM9);
+            this.originalClassName = originalClassName.replace('/', '.');
+        }
+
+        @Override
+        public void visitInnerClass(String name, String outerName, String innerName, int access) {
+            String className = name.replace('/', '.');
+            if (outerName != null) {
+                String outerClassName = outerName.replace('/', '.');
+                if (outerClassName.equals(originalClassName)) {
+                    innerClasses.add(className);
+                }
+            } else if (className.startsWith(originalClassName + "$")) {
+                innerClasses.add(className);
+            }
+        }
+
+    }
+}
@@ -0,0 +1,62 @@
+package com.reajason.javaweb.buddy;
+
+import net.bytebuddy.asm.AsmVisitorWrapper;
+import net.bytebuddy.description.field.FieldDescription;
+import net.bytebuddy.description.field.FieldList;
+import net.bytebuddy.description.method.MethodList;
+import net.bytebuddy.description.type.TypeDescription;
+import net.bytebuddy.implementation.Implementation;
+import net.bytebuddy.jar.asm.ClassVisitor;
+import net.bytebuddy.jar.asm.commons.ClassRemapper;
+import net.bytebuddy.jar.asm.commons.Remapper;
+import net.bytebuddy.pool.TypePool;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author ReaJason
+ * @since 2025/3/27
+ */
+public class ClassRenameVisitorWrapper implements AsmVisitorWrapper {
+    public final String originalClassName;
+    public final String newClassName;
+
+    public ClassRenameVisitorWrapper(String originalClassName, String newClassName) {
+        this.originalClassName = originalClassName.replace('.', '/');
+        this.newClassName = newClassName.replace('.', '/');
+    }
+
+
+    @Override
+    public int mergeReader(int flags) {
+        return flags;
+    }
+
+    @Override
+    public int mergeWriter(int flags) {
+        return flags;
+    }
+
+    @NotNull
+    @Override
+    public ClassVisitor wrap(@NotNull TypeDescription instrumentedType,
+                             @NotNull ClassVisitor classVisitor,
+                             @NotNull Implementation.Context implementationContext,
+                             @NotNull TypePool typePool,
+                             @NotNull FieldList<FieldDescription.InDefinedShape> fields,
+                             @NotNull MethodList<?> methods,
+                             int writerFlags,
+                             int readerFlags) {
+        return new ClassRemapper(
+                classVisitor,
+                new Remapper() {
+                    @Override
+                    public String map(String typeName) {
+                        if (typeName.startsWith(originalClassName)) {
+                            return typeName.replaceFirst(originalClassName, newClassName);
+                        } else {
+                            return typeName;
+                        }
+                    }
+                });
+    }
+}