maji-KY/HttpBackdoor.java

## HttpBackdoor.java
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.URL;
import java.util.List;
import java.util.Map.Entry;

import com.sun.net.httpserver.Headers;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

/**
 * usage:<br>
 *  java HttpBackdoor<br>
 *  java HttpBackdoor 8080<br>
 *  java HttpBackdoor -cp &lt;docRoot&gt;;.\ 8080
 *
 * @author maji_KY
 *
 */
public class HttpBackdoor implements HttpHandler {

	private static final Class<HttpBackdoor> cls = HttpBackdoor.class;
	private static final byte[] NOT_FOUND = "<html><head><title>404 - Not Found</title></head><body>404 - Not Found</body></html>".getBytes();
	private static final byte[] SERVER_ERROR = "<html><head><title>500 - Error</title></head><body>500 - Error</body></html>".getBytes();


	/**
	 * @param args port
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {

		HttpBackdoor httpBackdoor = new HttpBackdoor();

		int port = (args.length >= 1)?Integer.parseInt(args[0]):80;

		HttpServer server = HttpServer.create(new InetSocketAddress(port), 0);

		server.createContext("/", httpBackdoor);
		server.start();

	}

	@Override
	public void handle(HttpExchange ex)  throws IOException {

		OutputStream out = ex.getResponseBody();

		try {

			printLog(ex);
			URL url = cls.getResource(ex.getRequestURI().toString());

			if(url != null) {

				File file = new File(url.toURI());
				System.err.println(file);

				byte[] buf;
				if(file.isFile()) {
					InputStream is = cls.getResourceAsStream(ex.getRequestURI().toString());
					buf = new byte[(int) file.length()];
					is.read(buf);
					is.close();
				}else {
					StringBuilder sb = new StringBuilder("<html><title></title><body><a href=\"../\">../</a><br>\n");
					for(File f : file.listFiles()) {
						String name = f.isDirectory()?f.getName()+"/" : f.getName();
						sb.append("<a href=\"").append(name).append("\">").append(name).append("</a><br>\n");
					}
					sb.append("</body></html>");
					buf = sb.toString().getBytes();
				}

				ex.sendResponseHeaders(200, buf.length);
				out.write(buf);
				System.err.println("ok\n");
			}else {
				try {
					System.err.println("not found\n");
					ex.sendResponseHeaders(404, NOT_FOUND.length);
					out.write(NOT_FOUND);
				} catch (IOException e) {
					e.printStackTrace();
				}

			}

		} catch (Exception e) {
			System.err.println("error\n");
			ex.sendResponseHeaders(500, SERVER_ERROR.length);
			out.write(SERVER_ERROR);

			e.printStackTrace();
		} finally {
			out.close();
			ex.close();
		}

	}

	private void printLog(HttpExchange ex) {
		Headers headers = ex.getRequestHeaders();

		System.err.println(ex.getRemoteAddress());
		System.err.print(ex.getRequestMethod());
		System.err.print(" ");
		System.err.println(ex.getRequestURI());
		for(Entry<String, List<String>>  h : headers.entrySet()) {
			System.err.print(h.getKey()+":");
			System.err.println(h.getValue());
		}
		System.err.println();
	}

}
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.net.InetSocketAddress;
	import java.net.URL;
	import java.util.List;
	import java.util.Map.Entry;

	import com.sun.net.httpserver.Headers;
	import com.sun.net.httpserver.HttpExchange;
	import com.sun.net.httpserver.HttpHandler;
	import com.sun.net.httpserver.HttpServer;

	/**
	* usage:<br>
	* java HttpBackdoor<br>
	* java HttpBackdoor 8080<br>
	* java HttpBackdoor -cp <docRoot>;.\ 8080
	*
	* @author maji_KY
	*
	*/
	public class HttpBackdoor implements HttpHandler {

	private static final Class<HttpBackdoor> cls = HttpBackdoor.class;
	private static final byte[] NOT_FOUND = "<html><head><title>404 - Not Found</title></head><body>404 - Not Found</body></html>".getBytes();
	private static final byte[] SERVER_ERROR = "<html><head><title>500 - Error</title></head><body>500 - Error</body></html>".getBytes();


	/**
	* @param args port
	* @throws IOException
	*/
	public static void main(String[] args) throws IOException {

	HttpBackdoor httpBackdoor = new HttpBackdoor();

	int port = (args.length >= 1)?Integer.parseInt(args[0]):80;

	HttpServer server = HttpServer.create(new InetSocketAddress(port), 0);

	server.createContext("/", httpBackdoor);
	server.start();

	}

	@Override
	public void handle(HttpExchange ex) throws IOException {

	OutputStream out = ex.getResponseBody();

	try {

	printLog(ex);
	URL url = cls.getResource(ex.getRequestURI().toString());

	if(url != null) {

	File file = new File(url.toURI());
	System.err.println(file);

	byte[] buf;
	if(file.isFile()) {
	InputStream is = cls.getResourceAsStream(ex.getRequestURI().toString());
	buf = new byte[(int) file.length()];
	is.read(buf);
	is.close();
	}else {
	StringBuilder sb = new StringBuilder("<html><title></title><body><a href=\"../\">../</a><br>\n");
	for(File f : file.listFiles()) {
	String name = f.isDirectory()?f.getName()+"/" : f.getName();
	sb.append("<a href=\"").append(name).append("\">").append(name).append("</a><br>\n");
	}
	sb.append("</body></html>");
	buf = sb.toString().getBytes();
	}

	ex.sendResponseHeaders(200, buf.length);
	out.write(buf);
	System.err.println("ok\n");
	}else {
	try {
	System.err.println("not found\n");
	ex.sendResponseHeaders(404, NOT_FOUND.length);
	out.write(NOT_FOUND);
	} catch (IOException e) {
	e.printStackTrace();
	}

	}

	} catch (Exception e) {
	System.err.println("error\n");
	ex.sendResponseHeaders(500, SERVER_ERROR.length);
	out.write(SERVER_ERROR);

	e.printStackTrace();
	} finally {
	out.close();
	ex.close();
	}

	}

	private void printLog(HttpExchange ex) {
	Headers headers = ex.getRequestHeaders();

	System.err.println(ex.getRemoteAddress());
	System.err.print(ex.getRequestMethod());
	System.err.print(" ");
	System.err.println(ex.getRequestURI());
	for(Entry<String, List<String>> h : headers.entrySet()) {
	System.err.print(h.getKey()+":");
	System.err.println(h.getValue());
	}
	System.err.println();
	}

	}