package Ymodem; // ¶¨Òå°üÃûΪYmodem import java.io.*; // µ¼ÈëJavaÊäÈëÊä³ö°ü import java.nio.file.Files; // µ¼ÈëNIOÎļþ²Ù×÷Àà import java.nio.file.Path; // µ¼ÈëNIO·¾¶Àà import java.nio.file.attribute.BasicFileAttributes; // µ¼ÈëÎļþÊôÐÔÀà import java.util.Arrays; // µ¼ÈëÊý×鹤¾ßÀà public class YModem { // ¶¨ÒåYModemÀà private Modem modem; // ÉùÃ÷Modem¶ÔÏó static int size; // ¾²Ì¬´óС±äÁ¿ /** * ¹¹Ô캯Êý * @param inputStream Á÷£¬ÓÃÓÚ´ÓÁíÒ»¶Ë¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý * @param outputStream ÓÃÓÚ½«Êý¾ÝдÈëÁíÒ»¶ËµÄÁ÷ */ public YModem(InputStream inputStream, OutputStream outputStream) { // ¹¹Ô캯Êý this.modem = new Modem(inputStream, outputStream); // ³õʼ»¯Modem¶ÔÏó } // ½ø¶È»Øµ÷½Ó¿Ú public interface ProgressCallback { // ¶¨Òå½ø¶È»Øµ÷½Ó¿Ú void onProgress(int currentBlock, int totalBlocks); // ½ø¶È»Øµ÷·½·¨ } /** * ·¢ËÍÎļþ¡£ * ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£ * Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£ * @param file Îļþ·¾¶ * @throws IOException */ public void send(Path file) throws IOException { // ·¢ËÍÎļþ·½·¨ send(file, null); // µ÷Óôø½ø¶È»Øµ÷µÄ·¢ËÍ·½·¨ } /** * ·¢ËÍÎļþ£¨´ø½ø¶È»Øµ÷£©¡£ * ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£ * Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£ * @param file Îļþ·¾¶ * @param progressCallback ½ø¶È»Øµ÷ * @throws IOException */ public void send(Path file, ProgressCallback progressCallback) throws IOException { // ´ø½ø¶È»Øµ÷µÄ·¢ËÍ·½·¨ try (DataInputStream dataStream = new DataInputStream(Files.newInputStream(file))) { // ´´½¨ÎļþÊäÈëÁ÷ Timer timer = new Timer(Modem.WAIT_FOR_RECEIVER_TIMEOUT).start(); // ´´½¨²¢Æô¶¯¼ÆʱÆ÷ boolean useCRC16 = modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó²¢È·¶¨CRCÀàÐÍ CRC crc; // ÉùÃ÷CRC¶ÔÏó if (useCRC16) // Èç¹ûʹÓÃCRC16 crc = new CRC16(); // ´´½¨CRC16¶ÔÏó else // ·ñÔò crc = new CRC8(); // ´´½¨CRC8¶ÔÏó // ¼ÆËã×Ü¿éÊý long fileSize = Files.size(file); // »ñÈ¡Îļþ´óС int totalDataBlocks = (int) Math.ceil(fileSize / 128.0); // ¼ÆËãÊý¾Ý¿é×ÜÊý int totalBlocks = 2 + totalDataBlocks; // ÎļþÍ·¿é + Êý¾Ý¿é + ½áÊø¿é //·¢ËÍ¿é0£¨ÎļþÍ·£© BasicFileAttributes readAttributes = Files.readAttributes(file, BasicFileAttributes.class); // ¶ÁÈ¡ÎļþÊôÐÔ String name=file.getFileName().toString(); // »ñÈ¡ÎļþÃû String fileNameString = name + (char)0 + fileSize + " "+ Long.toOctalString(readAttributes.lastModifiedTime().toMillis() / 1000); // ¹¹½¨ÎļþÃû×Ö·û´® byte[] fileNameBytes = Arrays.copyOf(fileNameString.getBytes(), 128); // ½«ÎļþÃûת»»Îª×Ö½ÚÊý×é modem.sendBlock(0, Arrays.copyOf(fileNameBytes, 128), 128, crc); // ·¢ËÍÎļþÍ·¿é // ¸üнø¶È£¨ÎļþÍ·¿é£© if (progressCallback != null) { // Èç¹û½ø¶È»Øµ÷²»Îª¿Õ progressCallback.onProgress(1, totalBlocks); // µ÷Óýø¶È»Øµ÷ } modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó byte[] block = new byte[128]; // ´´½¨Êý¾Ý¿éÊý×é // ·¢ËÍÊý¾Ý¿é int blockNumber = 1; // ³õʼ»¯¿é±àºÅ int bytesRead; // ÉùÃ÷¶ÁÈ¡×Ö½ÚÊý±äÁ¿ while ((bytesRead = dataStream.read(block)) != -1) { // ¶ÁÈ¡ÎļþÊý¾Ý if (bytesRead < 128) { // Èç¹û¶ÁÈ¡×Ö½ÚÊýСÓÚ128 // Ìî³ä²»×㲿·Ö Arrays.fill(block, bytesRead, 128, Modem.CPMEOF); // ÓÃCPMEOFÌî³äÊ£Óಿ·Ö } modem.sendBlock(blockNumber, block, 128, crc); // ·¢ËÍÊý¾Ý¿é // ¸üнø¶È£¨Êý¾Ý¿é£© if (progressCallback != null) { // Èç¹û½ø¶È»Øµ÷²»Îª¿Õ progressCallback.onProgress(1 + blockNumber, totalBlocks); // µ÷Óýø¶È»Øµ÷ } blockNumber++; // ¿é±àºÅµÝÔö } modem.sendEOT(); // ·¢ËÍ´«Êä½áÊøÐźŠmodem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó byte[] bytes = new byte[128]; // ´´½¨¿Õ×Ö½ÚÊý×é modem.sendBlock(0, bytes, 128, crc); // ·¢ËÍ¿Õ¿é±íʾ´«Êä½áÊø // ¸üнø¶È£¨½áÊø¿é£© if (progressCallback != null) { // Èç¹û½ø¶È»Øµ÷²»Îª¿Õ progressCallback.onProgress(totalBlocks, totalBlocks); // µ÷Óýø¶È»Øµ÷ } } } /** * ÅúÁ¿·¢ËÍÎļþ¡£
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£ * Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£ * * @param files * @throws IOException */ public void batchSend(Path... files) throws IOException { // ÅúÁ¿·¢ËÍÎļþ·½·¨ for (Path file : files) { // ±éÀúÎļþÊý×é send(file); // ·¢ËÍÿ¸öÎļþ } sendBatchStop(); // ·¢ËÍÅúÁ¿´«Êä½áÊøÐźŠ} private void sendBatchStop() throws IOException { // ·¢ËÍÅúÁ¿´«Êä½áÊø·½·¨ Timer timer = new Timer(Modem.WAIT_FOR_RECEIVER_TIMEOUT).start(); // ´´½¨²¢Æô¶¯¼ÆʱÆ÷ boolean useCRC16 = modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó²¢È·¶¨CRCÀàÐÍ CRC crc; // ÉùÃ÷CRC¶ÔÏó if (useCRC16) // Èç¹ûʹÓÃCRC16 crc = new CRC16(); // ´´½¨CRC16¶ÔÏó else // ·ñÔò crc = new CRC8(); // ´´½¨CRC8¶ÔÏó //·¢ËÍ¿é0 byte[] bytes = new byte[128]; // ´´½¨¿Õ×Ö½ÚÊý×é modem.sendBlock(0, bytes, bytes.length, crc); // ·¢ËÍ¿Õ¿é±íʾÅúÁ¿´«Êä½áÊø } /** * ½ÓÊÕµ¥¸öÎļþ
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£ * Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£ * * @param directory Îļþ½«±£´æµÄĿ¼ * @return ´´½¨µÄÎļþ·¾¶ * @throws IOException */ public Path receiveSingleFileInDirectory(Path directory) throws IOException { // ½ÓÊÕµ¥¸öÎļþ·½·¨ return receive(directory, true); // µ÷ÓýÓÊÕ·½·¨ } /** * ÅúÁ¿½ÓÊÕÎļþ
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£ * Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£ * * @param directory Îļþ½«±£´æµÄĿ¼ * @throws IOException */ public void receiveFilesInDirectory(Path directory) throws IOException { // ÅúÁ¿½ÓÊÕÎļþ·½·¨ while (receive(directory, true) != null) { // Ñ­»·½ÓÊÕÎļþÖ±µ½·µ»Ønull } } /** * ½ÓÊÕ·¾¶
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£ * Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£ * * @param path Êý¾Ý½«±£´æµÄÎļþ·¾¶ * @return Îļþ·¾¶ * @throws IOException */ public Path receive(Path path) throws IOException { // ½ÓÊÕÎļþ·½·¨ return receive(path, false); // µ÷ÓýÓÊÕ·½·¨ } private Path receive(Path path, boolean inDirectory) throws IOException { // ˽ÓнÓÊÕ·½·¨ DataOutputStream dataOutput = null; // ÉùÃ÷Êý¾ÝÊä³öÁ÷ Path filePath; // ÉùÃ÷Îļþ·¾¶ try { CRC crc = new CRC16(); // ´´½¨CRC16¶ÔÏó int errorCount = 0; // ³õʼ»¯´íÎó¼ÆÊý // ´¦Àí¿é0 byte[] block; // ÉùÃ÷Êý¾Ý¿éÊý×é int character; // ÉùÃ÷×Ö·û±äÁ¿ while (true) { // Ñ­»·´¦Àí¿é0 character = modem.requestTransmissionStart(true); // ÇëÇó´«Ê俪ʼ try { // ´ÓÁã¿é¶ÁÈ¡ÎļþÃû block = modem.readBlock(0, (character == Modem.SOH), crc); // ¶ÁÈ¡¿é0 if (inDirectory) { // Èç¹ûÔÚĿ¼ÖÐ StringBuilder sb = new StringBuilder(); // ´´½¨×Ö·û´®¹¹½¨Æ÷ if (block[0] == 0) { // Èç¹û¿éÊ××Ö½ÚΪ0 //ÕâÊÇÅúÁ¿Îļþ´«ÊäµÄÍ£Ö¹¿é modem.sendByte(Modem.ACK); // ·¢ËÍACK return null; // ·µ»Ønull } for (int i = 0; i < block.length; i++) { // ±éÀú¿éÊý¾Ý if (block[i] == 0) { // Èç¹ûÓöµ½0×Ö½Ú break; // Ìø³öÑ­»· } sb.append((char) block[i]); // ×·¼Ó×Ö·ûµ½×Ö·û´®¹¹½¨Æ÷ } filePath = path.resolve(sb.toString()); // ½âÎöÎļþ·¾¶ } else { // ·ñÔò filePath = path; // Ö±½ÓʹÓ÷¾¶ } dataOutput = new DataOutputStream(Files.newOutputStream(filePath)); // ´´½¨ÎļþÊä³öÁ÷ modem.sendByte(Modem.ACK); // ·¢ËÍACK break; // Ìø³öÑ­»· } catch (TimeoutException | Modem.InvalidBlockException e) { // ²¶»ñ³¬Ê±ºÍÎÞЧ¿éÒì³£ errorCount++; // ´íÎó¼ÆÊýÔö¼Ó if (errorCount == Modem.MAXERRORS) { // Èç¹û´íÎó¼ÆÊý´ïµ½×î´óÖµ modem.interruptTransmission(); // Öжϴ«Êä throw new IOException("Transmission aborted, error count exceeded max"); // Å׳öIOÒì³£ } modem.sendByte(Modem.NAK); // ·¢ËÍNAK } catch (Modem.RepeatedBlockException | Modem.SynchronizationLostException e) { // ²¶»ñÖظ´¿éºÍͬ²½¶ªÊ§Òì³£ //ÖÂÃü´«Êä´íÎó modem.interruptTransmission(); // Öжϴ«Êä throw new IOException("Fatal transmission error", e); // Å׳öIOÒì³£ } } //½ÓÊÕÊý¾Ý¿é modem.receive(filePath, true); // ½ÓÊÕÊý¾Ý¿é } finally { if (dataOutput != null) { // Èç¹ûÊý¾ÝÊä³öÁ÷²»Îª¿Õ dataOutput.close(); // ¹Ø±ÕÊý¾ÝÊä³öÁ÷ } } return filePath; // ·µ»ØÎļþ·¾¶ } public static int getSize() { // »ñÈ¡´óС·½·¨ return size; // ·µ»Ø´óС } }