Java tutorial
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We also recommend that a * file or class name and description of purpose be included on the * same "printed page" as the copyright notice for easier * identification within third-party archives. * * Copyright 2016 Alibaba Group * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * */ package com.taobao.android.builder.tools.classinject; import java.io.BufferedOutputStream; import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Collection; import java.util.Enumeration; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.jar.JarEntry; import java.util.jar.JarFile; import java.util.jar.JarOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipException; import java.util.zip.ZipOutputStream; import com.alibaba.fastjson.JSON; import javassist.CannotCompileException; import javassist.ClassPool; import javassist.CtClass; import javassist.CtConstructor; import javassist.CtField; import javassist.CtMethod; import javassist.CtNewMethod; import javassist.Modifier; import javassist.NotFoundException; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOUtils; import org.apache.commons.lang.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Javassist?? * Created by shenghua.nish on 2015-10-22 ?6:35. */ public class CodeInjectByJavassist { public static Map<String, ClazzInjecter> sInjecterMap = new HashMap<String, ClazzInjecter>(); private static Logger logger = LoggerFactory.getLogger(CodeInjectByJavassist.class); public synchronized static byte[] inject(ClassPool pool, String className, InjectParam injectParam) throws Exception { CtClass cc = pool.get(className); cc.defrost(); if (className.equalsIgnoreCase("android.taobao.atlas.framework.FrameworkProperties") || className.equalsIgnoreCase("android.taobao.atlas.version.VersionKernal")) { if (StringUtils.isNotBlank(injectParam.version)) { CtClass ctClass = pool.get("java.lang.String"); CtField ctField = new CtField(ctClass, "version", cc); ctField.setModifiers(Modifier.PRIVATE); CtMethod ctMethod = CtNewMethod.getter("getVersion", ctField); ctMethod.setModifiers(Modifier.PUBLIC); CtField.Initializer initializer = CtField.Initializer.constant(injectParam.version); cc.addField(ctField, initializer); cc.addMethod(ctMethod); logger.info("[android.taobao.atlas.framework.FrameworkProperties] inject version " + injectParam.version); } addField(pool, cc, "bundleInfo", injectParam.bundleInfo); addField(pool, cc, "autoStartBundles", injectParam.autoStartBundles); addField(pool, cc, "preLaunch", injectParam.preLaunch); addField(pool, cc, "group", injectParam.group); addField(pool, cc, "outApp", String.valueOf(injectParam.outApp)); if (null != injectParam.outputFile) { Map output = new HashMap(); output.put("bundleInfo", JSON.parseArray(injectParam.bundleInfo)); output.put("autoStartBundles", injectParam.autoStartBundles); output.put("preLaunch", injectParam.preLaunch); output.put("group", injectParam.group); output.put("outApp", injectParam.outApp); FileUtils.write(injectParam.outputFile, JSON.toJSONString(output, true)); } } ClazzInjecter clazzInjecter = sInjecterMap.get(className); if (null != clazzInjecter) { Map<String, String> stringMap = clazzInjecter.getInjectFields(); if (!stringMap.isEmpty()) { for (String key : stringMap.keySet()) { addField(pool, cc, key, stringMap.get(key)); } } } if (!injectParam.removePreverify) { Collection<String> refClasses = cc.getRefClasses(); if (refClasses.contains("com.taobao.verify.Verifier")) { return cc.toBytecode(); } boolean flag = false; if (className.equalsIgnoreCase("com.ut.mini.crashhandler.IUTCrashCaughtListner")) { flag = true; } if (cc.isInterface()) { final CtClass defClass = pool.get(Class.class.getName()); CtField defField = new CtField(defClass, "_inject_field__", cc); defField.setModifiers(Modifier.STATIC | Modifier.PUBLIC | Modifier.FINAL); cc.addField(defField, CtField.Initializer.byExpr( "Boolean.TRUE.booleanValue()?java.lang.String.class:com.taobao.verify.Verifier" + ".class;")); } else { CtConstructor[] ctConstructors = cc.getDeclaredConstructors(); if (null != ctConstructors && ctConstructors.length > 0) { CtConstructor ctConstructor = ctConstructors[0]; ctConstructor.insertBeforeBody( "if(Boolean.FALSE.booleanValue()){java.lang.String.valueOf(com.taobao.verify.Verifier" + ".class);}"); } else { final CtClass defClass = pool.get(Class.class.getName()); CtField defField = new CtField(defClass, "_inject_field__", cc); defField.setModifiers(Modifier.STATIC); cc.addField(defField, CtField.Initializer .byExpr("Boolean.TRUE.booleanValue()?java.lang.String.class:com.taobao.verify" + ".Verifier.class;")); } } } return cc.toBytecode(); } private static void addField(ClassPool pool, CtClass cc, String key, String value) throws NotFoundException, CannotCompileException { if (StringUtils.isNotBlank(value)) { try { cc.removeField(cc.getField(key)); } catch (NotFoundException notfoundException) { } logger.info("inject key " + key + "->" + value); CtClass ctClass = pool.get("java.lang.String"); CtField ctField = new CtField(ctClass, key, cc); ctField.setModifiers(Modifier.STATIC | Modifier.PUBLIC); CtField.Initializer initializer = CtField.Initializer.constant(value); cc.addField(ctField, initializer); } } /** * folderclass?? * * @param pool * @param folder * @param outFolder * @return * @throws IOException * @throws CannotCompileException * @throws NotFoundException * @throws Exception */ public static List<String> injectFolder(ClassPool pool, File folder, File outFolder, InjectParam injectParam) throws Exception { List<String> errorFiles = new ArrayList<String>(); if (folder.exists() && folder.isDirectory()) { Collection<File> classFiles = FileUtils.listFiles(folder, new String[] { "class" }, true); for (File classFile : classFiles) { String className = toRelative(folder, classFile.getAbsolutePath()); File outClassFile = new File(outFolder, className); outClassFile.getParentFile().mkdirs(); className = StringUtils.replace(className, File.separator, "."); className = className.substring(0, className.length() - 6); byte[] codes; codes = inject(pool, className, injectParam); FileUtils.writeByteArrayToFile(outClassFile, codes); } } return errorFiles; } /** * jar? * * @param inJar * @param outJar * @throws IOException * @throws NotFoundException * @throws CannotCompileException */ public static List<String> inject(ClassPool pool, File inJar, File outJar, InjectParam injectParam) throws Exception { List<String> errorFiles = new ArrayList<String>(); JarFile jarFile = newJarFile(inJar); outJar.getParentFile().mkdirs(); FileOutputStream fileOutputStream = new FileOutputStream(outJar); JarOutputStream jos = new JarOutputStream(new BufferedOutputStream(fileOutputStream)); Enumeration<JarEntry> jarFileEntries = jarFile.entries(); JarEntry jarEntry = null; while (jarFileEntries.hasMoreElements()) { jarEntry = jarFileEntries.nextElement(); String name = jarEntry.getName(); String className = StringUtils.replace(name, File.separator, "/"); className = StringUtils.replace(className, "/", "."); className = StringUtils.substring(className, 0, className.length() - 6); if (!StringUtils.endsWithIgnoreCase(name, ".class")) { InputStream inputStream = jarFile.getInputStream(jarEntry); copyStreamToJar(inputStream, jos, name, jarEntry.getTime(), jarEntry); IOUtils.closeQuietly(inputStream); } else { byte[] codes; codes = inject(pool, className, injectParam); InputStream classInstream = new ByteArrayInputStream(codes); copyStreamToJar(classInstream, jos, name, jarEntry.getTime(), jarEntry); } } jarFile.close(); IOUtils.closeQuietly(jos); return errorFiles; } private static void copyStreamToJar(InputStream zin, ZipOutputStream out, String currentName, long fileTime, ZipEntry zipEntry) throws IOException { // Create new entry for zip file. ZipEntry newEntry = new ZipEntry(currentName); // Make sure there is date and time set. if (fileTime != -1) { newEntry.setTime(fileTime); // If found set it into output file. } out.putNextEntry(newEntry); if (zin != null) { IOUtils.copy(zin, out); } } private static JarFile newJarFile(File jar) throws IOException { try { return new JarFile(jar); } catch (ZipException zex) { throw new ZipException("error in opening zip file " + jar); } } public static String toRelative(File basedir, String absolutePath) { absolutePath = absolutePath.replace('\\', '/'); String basedirPath = basedir.getAbsolutePath().replace('\\', '/'); String relative; if (absolutePath.startsWith(basedirPath)) { relative = absolutePath.substring(basedirPath.length()); if (relative.startsWith("/")) { relative = relative.substring(1); } if (relative.length() <= 0) { relative = "."; } } else { relative = absolutePath; } return relative; } }