Java tutorial
/* * Copyright 2017 ZhangJiupeng * * 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 cc.agentx.client; import cc.agentx.protocol.request.XRequestWrapper; import cc.agentx.protocol.request.XRequestWrapperFactory; import cc.agentx.util.KeyHelper; import cc.agentx.wrapper.Wrapper; import cc.agentx.wrapper.WrapperFactory; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.annotations.Expose; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.util.Arrays; public class Configuration { private static final Logger log = LoggerFactory.getLogger(Configuration.class); private static final String BASE_PATH = System.getProperty("user.dir").replaceAll("\\\\", "/"); private static final String[] CONFIG_FILE_PATH = { "/conf/client.json", "/client.json", "/conf/agentx.json", "/agentx.json", "/conf/config.json", "/config.json" }; public static Configuration INSTANCE; @Expose private String localHost = "0.0.0.0"; @Expose private int localPort = 1080; @Expose private String mode = "agentx"; @Expose private String serverHost = "0.0.0.0"; @Expose private int[] serverPort = { 9999 }; @Expose private String protocol = "shadowsocks"; @Expose private String encryption = "aes-256-cfb"; @Expose private String password = "my_password"; @Expose private String[] process = { "encrypt" }; private String consoleDomain; private int consolePort; private Configuration() { } @Override public String toString() { return "{\n" + " localHost: \"" + localHost + "\",\n" + " localPort: " + localPort + ",\n" + " mode: \"" + mode + "\",\n" + " serverHost: \"" + serverHost + "\",\n" + " serverPort: " + Arrays.toString(serverPort) + ",\n" + " encryption: \"" + encryption + "\",\n" + " password: \"" + password + "\",\n" + " protocol: \"" + protocol + "\",\n" + " process: " + Arrays.toString(process) + "\n" + '}'; } @SuppressWarnings("Duplicates") private static void load() throws Exception { String json = ""; InputStream inputStream = null; for (String path : CONFIG_FILE_PATH) { inputStream = Configuration.class.getResourceAsStream(path); if (inputStream != null) { log.info("\tFound resource [{}]", path); break; } log.debug("\tCould NOT find resource [{}]", path); } for (String path : CONFIG_FILE_PATH) { File file = new File(BASE_PATH, path); if (file.exists()) { inputStream = new FileInputStream(file); log.info("\tFound resource [{}]", file.getAbsolutePath()); break; } log.debug("\tCould NOT find resource [{}]", file.getAbsolutePath()); } Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().setPrettyPrinting().create(); if (inputStream == null) { log.warn("\tCould NOT find resource [{}]", "config.json"); File configFile = new File(BASE_PATH, "config.json"); if (configFile.createNewFile()) { log.warn("\tCreate default [config.json] at [{}]", configFile.getPath()); BufferedWriter writer = new BufferedWriter(new FileWriter(configFile)); writer.write(json = gson.toJson(new Configuration())); writer.close(); log.warn("\tPlease reboot this program after configuration."); System.exit(0); } else { throw new RuntimeException("file not found (" + configFile.getPath() + ")"); } } else { BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); while (reader.ready()) { json += reader.readLine().concat("\n"); } reader.close(); } Configuration.INSTANCE = gson.fromJson(json, Configuration.class); log.debug(INSTANCE.toString()); } private static void check() throws Exception { if (!XRequestWrapperFactory.exists(INSTANCE.protocol)) { throw new Exception("unknown protocol \"" + INSTANCE.protocol + "\""); } if (!INSTANCE.mode.equals("agentx") && !INSTANCE.mode.equals("socks5")) { throw new Exception("unknown mode \"" + INSTANCE.mode + "\""); } for (String processFunction : INSTANCE.process) { if (!WrapperFactory.exists(INSTANCE, processFunction)) { throw new Exception("unknown encryption \"" + INSTANCE.encryption + "\"" + " or process function \"" + processFunction + "\""); } } } public static Configuration init() throws Exception { log.info("\tLoading configuration file..."); load(); log.info("\tChecking configuration items..."); check(); log.info("\tEnd of configuration"); return INSTANCE; } public void setConsole(String consoleHost, int consolePort) { this.consoleDomain = consoleHost; this.consolePort = consolePort; } public int getServerPort() { return serverPort[KeyHelper.generateRandomInteger(0, serverPort.length)]; } public String getLocalHost() { return localHost; } public int getLocalPort() { return localPort; } public String getServerHost() { return serverHost; } public String getProtocol() { return protocol; } public String getEncryption() { return encryption; } public String getPassword() { return password; } public String getMode() { return mode; } public int getConsolePort() { return consolePort; } public String getConsoleDomain() { return consoleDomain; } public Wrapper getWrapper() { Wrapper[] wrappers = new Wrapper[process.length]; for (int i = 0; i < process.length; i++) { try { wrappers[i] = WrapperFactory.getInstance(this, process[i]); } catch (Exception e) { e.printStackTrace(); return null; } } return WrapperFactory.getInstance(wrappers); } public XRequestWrapper getXRequestWrapper() { try { return XRequestWrapperFactory.getInstance(protocol); } catch (Exception e) { e.printStackTrace(); return null; } } }