/** * Checks if a given file exists and, if not, create it by copying a default template from * resources; used to create default conf files. * * @param file The path of the file that needs to exist * @param template The path of the template for the file */ public static void ensureFileExists(final String file, final String template) { if (LAUNCHED_FROM_JAR && !Files.exists(Paths.get(file))) { if (Debug.on) printDebug("[Meta] " + file + " does not exist: creating a default one."); InputStream stream = Meta.class.getResourceAsStream(template); if (stream == null) { printDebug( "[ WARNING ] template for " + template + " not found. Won't create a default " + file + "."); } else { int readBytes; byte[] buffer = new byte[4096]; try (OutputStream outStream = new FileOutputStream(new File(file))) { while ((readBytes = stream.read(buffer)) > 0) { outStream.write(buffer, 0, readBytes); } if (Debug.on) printDebug("[Meta] created default file " + file + " from " + template + "."); } catch (IOException e) { e.printStackTrace(); } finally { try { stream.close(); } catch (IOException ignore) { } } } } else { if (Meta.LAUNCHED_FROM_JAR && Debug.on) printDebug("[Meta] file exists: " + file + "."); } }
public static void write(OutputStream out, String content) { try (OutputStream o = out) { o.write(content.getBytes(DEFAULT_CHARSET)); } catch (Exception ex) { Exceptions.handle(ex); } }
public static void write(OutputStream out, String content, Charset charset) { try (OutputStream o = out) { o.write(content.getBytes(charset)); } catch (Exception ex) { Exceptions.handle(ex); } }
/** * 以阻塞的方式立即下载一个文件,该方法会覆盖已经存在的文件 * * @param task * @return "ok" if download success (else return errmessage); */ static String download(DownloadTask task) { if (!openedStatus && show) openStatus(); URL url; HttpURLConnection conn; try { url = new URL(task.getOrigin()); conn = (HttpURLConnection) url.openConnection(); conn.setConnectTimeout(30000); conn.setReadTimeout(30000); conn.setRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/" + Math.random()); if ("www.imgjav.com".equals(url.getHost())) { // 该网站需要带cookie请求 conn.setRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36"); // conn.setRequestProperty("Cookie", "__cfduid=d219ea333c7a9b5743b572697b631925a1446093229; // cf_clearance=6ae62d843f5d09acf393f9e4eb130d9366840c82-1446093303-28800"); conn.setRequestProperty( "Cookie", "__cfduid=d6ee846b378bb7d5d173a05541f8a2b6a1446090548; cf_clearance=ea10e8db31f8b6ee51570b118dd89b7e616d7b62-1446099714-28800"); conn.setRequestProperty("Host", "www.imgjav.com"); } Path directory = Paths.get(task.getDest()).getParent(); if (!Files.exists(directory)) Files.createDirectories(directory); } catch (Exception e) { e.printStackTrace(); return e.getMessage(); } try (InputStream is = conn.getInputStream(); BufferedInputStream in = new BufferedInputStream(is); FileOutputStream fos = new FileOutputStream(task.getDest()); OutputStream out = new BufferedOutputStream(fos); ) { int length = conn.getContentLength(); if (length < 1) throw new IOException("length<1"); byte[] binary = new byte[length]; byte[] buff = new byte[65536]; int len; int index = 0; while ((len = in.read(buff)) != -1) { System.arraycopy(buff, 0, binary, index, len); index += len; allLen += len; // allLen有线程安全的问题 ,可能会不正确。无需精确数据,所以不同步了 task.setReceivePercent(String.format("%.2f", ((float) index / length) * 100) + "%"); } out.write(binary); } catch (IOException e) { e.printStackTrace(); return e.getMessage(); } return "ok"; }
void copy(InputStream in, File dest) throws IOException { dest.getParentFile().mkdirs(); OutputStream out = new BufferedOutputStream(new FileOutputStream(dest)); try { byte[] data = new byte[8192]; int n; while ((n = in.read(data, 0, data.length)) > 0) out.write(data, 0, n); } finally { out.close(); in.close(); } }
// create file of random size in given directory static Path createSourceFile(Path dir) throws IOException { String name = "source" + Integer.toString(rand.nextInt()); Path file = dir.resolve(name); createFile(file); byte[] bytes = new byte[rand.nextInt(128 * 1024)]; rand.nextBytes(bytes); try (OutputStream out = newOutputStream(file)) { out.write(bytes); } randomizeAttributes(file); return file; }
public void run() { try { sc = new Socket(); InetSocketAddress isa = new InetSocketAddress("localhost", 9999); sc.connect(isa); OutputStream ost = sc.getOutputStream(); for (int i = 0; i < 10; ++i) { String str = "client interation " + (new Integer(i)).toString(); ost.write(str.getBytes()); ost.flush(); System.out.println("Client at " + (new Integer(i)).toString()); sleep(1000); } } catch (Exception e) { } }
/** Simple test of each of the standard events */ static void testEvents(Path dir) throws IOException { System.out.println("-- Standard Events --"); FileSystem fs = FileSystems.getDefault(); Path name = fs.getPath("foo"); try (WatchService watcher = fs.newWatchService()) { // --- ENTRY_CREATE --- // register for event System.out.format("register %s for ENTRY_CREATE\n", dir); WatchKey myKey = dir.register(watcher, new WatchEvent.Kind<?>[] {ENTRY_CREATE}); checkKey(myKey, dir); // create file Path file = dir.resolve("foo"); System.out.format("create %s\n", file); Files.createFile(file); // remove key and check that we got the ENTRY_CREATE event takeExpectedKey(watcher, myKey); checkExpectedEvent(myKey.pollEvents(), StandardWatchEventKinds.ENTRY_CREATE, name); System.out.println("reset key"); if (!myKey.reset()) throw new RuntimeException("key has been cancalled"); System.out.println("OKAY"); // --- ENTRY_DELETE --- System.out.format("register %s for ENTRY_DELETE\n", dir); WatchKey deleteKey = dir.register(watcher, new WatchEvent.Kind<?>[] {ENTRY_DELETE}); if (deleteKey != myKey) throw new RuntimeException("register did not return existing key"); checkKey(deleteKey, dir); System.out.format("delete %s\n", file); Files.delete(file); takeExpectedKey(watcher, myKey); checkExpectedEvent(myKey.pollEvents(), StandardWatchEventKinds.ENTRY_DELETE, name); System.out.println("reset key"); if (!myKey.reset()) throw new RuntimeException("key has been cancalled"); System.out.println("OKAY"); // create the file for the next test Files.createFile(file); // --- ENTRY_MODIFY --- System.out.format("register %s for ENTRY_MODIFY\n", dir); WatchKey newKey = dir.register(watcher, new WatchEvent.Kind<?>[] {ENTRY_MODIFY}); if (newKey != myKey) throw new RuntimeException("register did not return existing key"); checkKey(newKey, dir); System.out.format("update: %s\n", file); try (OutputStream out = Files.newOutputStream(file, StandardOpenOption.APPEND)) { out.write("I am a small file".getBytes("UTF-8")); } // remove key and check that we got the ENTRY_MODIFY event takeExpectedKey(watcher, myKey); checkExpectedEvent(myKey.pollEvents(), StandardWatchEventKinds.ENTRY_MODIFY, name); System.out.println("OKAY"); // done Files.delete(file); } }