公司开发框架增加了web系统license授权证书校验模块,实行一台机器一个授权证书,初步方案是增加拦截器针对全局请求进行拦截校验,评估后认为校验方式单一,应该增加重要工具类,业务service实现中每个方法的进行校验,因为涉及代码量较大硬编码工作困难,故选择通过自定义maven插件在编译期间进行动态代码插桩操作
新建maven项目设置打包方式
<packaging>maven-plugin</packaging>
增加依赖项
<!--使用doc的方式-->
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>3.5.2</version>
</dependency>
<!--使用注解的方式-->
<dependency>
<groupId>org.apache.maven.plugin-tools</groupId>
<artifactId>maven-plugin-annotations</artifactId>
<version>3.5.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-project</artifactId>
<version>2.2.1</version>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>9.0</version>
</dependency>
build内容配置
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-plugin-plugin</artifactId>
<version>3.5</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
创建编译操作类FramePlugin,继承AbstractMojo并使用Mojo注解标注,output参数是class文件编译后路径
@Mojo(name = "deepcompile", defaultPhase = LifecyclePhase.COMPILE)
public class FramePlugin extends AbstractMojo {
@Parameter(name = "output", defaultValue = "${project.build.directory}")
private File output;
public void execute() throws MojoExecutionException {
File f = ;
if (!f.exists()) {
f.mkdirs();
}
try {
insertPile(f);
} catch (Exception e) {
exceptioncount++;
e.printStackTrace();
}
}
新建ClassVisitor重写visitMethod方法来过滤访问需要插桩的方法,需要排除自带的init方法
public class MethodCoverageClassVisitor extends ClassVisitor {
public MethodCoverageClassVisitor(ClassVisitor classVisitor) {
super(Opcodes.ASM9, classVisitor);
}
@Override
public MethodVisitor visitMethod(int access, String name, String descriptor, String signature,
String[] exceptions) {
final MethodVisitor methodVisitor = super.visitMethod(access, name, descriptor, signature, exceptions);
if (name.equals("<init>")) {
return methodVisitor;
}
return new MethodCoverageMethodVisitor(Opcodes.ASM9, methodVisitor);
}
}
新建MethodVisitor重写visitCode方法针对方法内部字节码进行自定义操作,这里是使用框架内部封装好的一个静态方法来校验license证书
public class MethodCoverageMethodVisitor extends MethodVisitor {
public MethodCoverageMethodVisitor(int api, MethodVisitor methodVisitor) {
super(api, methodVisitor);
}
@Override
public void visitCode() {
mv.visitFieldInsn(Opcodes.INVOKESTATIC, "com/xxxx/frame/common/utils/ComplieSDK", "checkLicense", "()V");
}
}
最后在execute中进行文件递归查找调用,就是将已经编译的class文件读取/自定义操作后保存
private void insertPile(File root) throws IOException {
if (root.isDirectory()) {
for (File file : root.listFiles()) {
insertPile(file);
}
}
String className = root.getName().replace(".class", "");
if (root.getName().endsWith(".class")) {
//class筛选
boolean flag = false;
//自定义的class文件筛选条件代码
if (flag) {
System.out.println("【insertPile】:" + className);
FileOutputStream fos = null;
try {
final byte[] instrumentBytes = doInsertPile(root);
fos = new FileOutputStream(root);
fos.write(instrumentBytes);
fos.flush();
} catch (MojoExecutionException e) {
System.out.println("【insertPile-exception】:" + className);
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
}
}
maven-plugin项目执行mvn install安装到本地仓库
框架项目配置自定义maven插件进行打包,配置执行的声明周期为complie(编译),这里goal自定义命令名称需要和mojo注解标注类中指定的name名称一致
<plugin>
<groupId>com.xxxxx</groupId>
<artifactId>frame-maven-plugin</artifactId>
<version>1.2.5</version>
<executions>
<execution>
<goals>
<!-- 执行目标 -->
<goal>deepcompile</goal>
</goals>
<!-- 执行这个目标所在的生命周期 -->
<phase>compile</phase>
</execution>
</executions>
</plugin>