package Ymodem; // ¶¨Òå°üÃûΪYmodem
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import java.io.*; // µ¼ÈëJavaÊäÈëÊä³ö°ü
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import java.nio.file.Files; // µ¼ÈëNIOÎļþ²Ù×÷Àà
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import java.nio.file.Path; // µ¼ÈëNIO·¾¶Àà
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import java.nio.file.attribute.BasicFileAttributes; // µ¼ÈëÎļþÊôÐÔÀà
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import java.util.Arrays; // µ¼ÈëÊý×鹤¾ßÀà
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public class YModem { // ¶¨ÒåYModemÀà
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private Modem modem; // ÉùÃ÷Modem¶ÔÏó
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static int size; // ¾²Ì¬´óС±äÁ¿
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/**
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* ¹¹Ô캯Êý
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* @param inputStream Á÷£¬ÓÃÓÚ´ÓÁíÒ»¶Ë¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
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* @param outputStream ÓÃÓÚ½«Êý¾ÝдÈëÁíÒ»¶ËµÄÁ÷
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*/
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public YModem(InputStream inputStream, OutputStream outputStream) { // ¹¹Ô캯Êý
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this.modem = new Modem(inputStream, outputStream); // ³õʼ»¯Modem¶ÔÏó
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}
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// ½ø¶È»Øµ÷½Ó¿Ú
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public interface ProgressCallback { // ¶¨Òå½ø¶È»Øµ÷½Ó¿Ú
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void onProgress(int currentBlock, int totalBlocks); // ½ø¶È»Øµ÷·½·¨
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}
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/**
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* ·¢ËÍÎļþ¡£
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£
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* Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£
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* @param file Îļþ·¾¶
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* @throws IOException
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*/
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public void send(Path file) throws IOException { // ·¢ËÍÎļþ·½·¨
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send(file, null); // µ÷Óôø½ø¶È»Øµ÷µÄ·¢ËÍ·½·¨
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}
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/**
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* ·¢ËÍÎļþ£¨´ø½ø¶È»Øµ÷£©¡£
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£
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* Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£
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* @param file Îļþ·¾¶
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* @param progressCallback ½ø¶È»Øµ÷
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* @throws IOException
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*/
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public void send(Path file, ProgressCallback progressCallback) throws IOException { // ´ø½ø¶È»Øµ÷µÄ·¢ËÍ·½·¨
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try (DataInputStream dataStream = new DataInputStream(Files.newInputStream(file))) { // ´´½¨ÎļþÊäÈëÁ÷
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Timer timer = new Timer(Modem.WAIT_FOR_RECEIVER_TIMEOUT).start(); // ´´½¨²¢Æô¶¯¼ÆʱÆ÷
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boolean useCRC16 = modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó²¢È·¶¨CRCÀàÐÍ
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CRC crc; // ÉùÃ÷CRC¶ÔÏó
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if (useCRC16) // Èç¹ûʹÓÃCRC16
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crc = new CRC16(); // ´´½¨CRC16¶ÔÏó
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else // ·ñÔò
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crc = new CRC8(); // ´´½¨CRC8¶ÔÏó
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// ¼ÆËã×Ü¿éÊý
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long fileSize = Files.size(file); // »ñÈ¡Îļþ´óС
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int totalDataBlocks = (int) Math.ceil(fileSize / 128.0); // ¼ÆËãÊý¾Ý¿é×ÜÊý
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int totalBlocks = 2 + totalDataBlocks; // ÎļþÍ·¿é + Êý¾Ý¿é + ½áÊø¿é
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//·¢ËÍ¿é0£¨ÎļþÍ·£©
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BasicFileAttributes readAttributes = Files.readAttributes(file, BasicFileAttributes.class); // ¶ÁÈ¡ÎļþÊôÐÔ
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String name=file.getFileName().toString(); // »ñÈ¡ÎļþÃû
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String fileNameString = name + (char)0 + fileSize + " "+ Long.toOctalString(readAttributes.lastModifiedTime().toMillis() / 1000); // ¹¹½¨ÎļþÃû×Ö·û´®
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byte[] fileNameBytes = Arrays.copyOf(fileNameString.getBytes(), 128); // ½«ÎļþÃûת»»Îª×Ö½ÚÊý×é
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modem.sendBlock(0, Arrays.copyOf(fileNameBytes, 128), 128, crc); // ·¢ËÍÎļþÍ·¿é
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// ¸üнø¶È£¨ÎļþÍ·¿é£©
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if (progressCallback != null) { // Èç¹û½ø¶È»Øµ÷²»Îª¿Õ
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progressCallback.onProgress(1, totalBlocks); // µ÷Óýø¶È»Øµ÷
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}
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modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó
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byte[] block = new byte[128]; // ´´½¨Êý¾Ý¿éÊý×é
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// ·¢ËÍÊý¾Ý¿é
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int blockNumber = 1; // ³õʼ»¯¿é±àºÅ
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int bytesRead; // ÉùÃ÷¶ÁÈ¡×Ö½ÚÊý±äÁ¿
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while ((bytesRead = dataStream.read(block)) != -1) { // ¶ÁÈ¡ÎļþÊý¾Ý
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if (bytesRead < 128) { // Èç¹û¶ÁÈ¡×Ö½ÚÊýСÓÚ128
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// Ìî³ä²»×㲿·Ö
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Arrays.fill(block, bytesRead, 128, Modem.CPMEOF); // ÓÃCPMEOFÌî³äÊ£Óಿ·Ö
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}
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modem.sendBlock(blockNumber, block, 128, crc); // ·¢ËÍÊý¾Ý¿é
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// ¸üнø¶È£¨Êý¾Ý¿é£©
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if (progressCallback != null) { // Èç¹û½ø¶È»Øµ÷²»Îª¿Õ
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progressCallback.onProgress(1 + blockNumber, totalBlocks); // µ÷Óýø¶È»Øµ÷
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}
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blockNumber++; // ¿é±àºÅµÝÔö
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}
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modem.sendEOT(); // ·¢ËÍ´«Êä½áÊøÐźÅ
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modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó
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byte[] bytes = new byte[128]; // ´´½¨¿Õ×Ö½ÚÊý×é
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modem.sendBlock(0, bytes, 128, crc); // ·¢ËÍ¿Õ¿é±íʾ´«Êä½áÊø
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// ¸üнø¶È£¨½áÊø¿é£©
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if (progressCallback != null) { // Èç¹û½ø¶È»Øµ÷²»Îª¿Õ
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progressCallback.onProgress(totalBlocks, totalBlocks); // µ÷Óýø¶È»Øµ÷
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}
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}
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}
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/**
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* ÅúÁ¿·¢ËÍÎļþ¡£<br/>
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* <p>
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£
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* Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£
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*
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* @param files
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* @throws IOException
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*/
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public void batchSend(Path... files) throws IOException { // ÅúÁ¿·¢ËÍÎļþ·½·¨
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for (Path file : files) { // ±éÀúÎļþÊý×é
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send(file); // ·¢ËÍÿ¸öÎļþ
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}
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sendBatchStop(); // ·¢ËÍÅúÁ¿´«Êä½áÊøÐźÅ
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}
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private void sendBatchStop() throws IOException { // ·¢ËÍÅúÁ¿´«Êä½áÊø·½·¨
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Timer timer = new Timer(Modem.WAIT_FOR_RECEIVER_TIMEOUT).start(); // ´´½¨²¢Æô¶¯¼ÆʱÆ÷
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boolean useCRC16 = modem.waitReceiverRequest(timer); // µÈ´ý½ÓÊÕ·½ÇëÇó²¢È·¶¨CRCÀàÐÍ
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CRC crc; // ÉùÃ÷CRC¶ÔÏó
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if (useCRC16) // Èç¹ûʹÓÃCRC16
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crc = new CRC16(); // ´´½¨CRC16¶ÔÏó
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else // ·ñÔò
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crc = new CRC8(); // ´´½¨CRC8¶ÔÏó
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//·¢ËÍ¿é0
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byte[] bytes = new byte[128]; // ´´½¨¿Õ×Ö½ÚÊý×é
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modem.sendBlock(0, bytes, bytes.length, crc); // ·¢ËÍ¿Õ¿é±íʾÅúÁ¿´«Êä½áÊø
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}
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/**
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* ½ÓÊÕµ¥¸öÎļþ <br/>
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* <p>
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£
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* Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£
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*
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* @param directory Îļþ½«±£´æµÄĿ¼
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* @return ´´½¨µÄÎļþ·¾¶
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* @throws IOException
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*/
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public Path receiveSingleFileInDirectory(Path directory) throws IOException { // ½ÓÊÕµ¥¸öÎļþ·½·¨
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return receive(directory, true); // µ÷ÓýÓÊÕ·½·¨
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}
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/**
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* ÅúÁ¿½ÓÊÕÎļþ <br/>
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* <p>
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£
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* Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£
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*
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* @param directory Îļþ½«±£´æµÄĿ¼
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* @throws IOException
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*/
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public void receiveFilesInDirectory(Path directory) throws IOException { // ÅúÁ¿½ÓÊÕÎļþ·½·¨
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while (receive(directory, true) != null) { // Ñ»·½ÓÊÕÎļþÖ±µ½·µ»Ønull
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}
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}
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/**
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* ½ÓÊÕ·¾¶ <br/>
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* <p>
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* ´Ë·½·¨Ö§³ÖÕýÈ·µÄÏß³ÌÖжϣ¬µ±Ïß³ÌÖжÏʱ½«·¢ËÍ"È¡Ïû´«Êä"¡£
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* Òò´Ë£¬Äú¿ÉÒÔ½«³¤´«ÊäÒƶ¯µ½ÆäËûÏ̲߳¢¸ù¾ÝÄúµÄËã·¨ÖжÏËü¡£
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*
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* @param path Êý¾Ý½«±£´æµÄÎļþ·¾¶
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* @return Îļþ·¾¶
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* @throws IOException
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*/
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public Path receive(Path path) throws IOException { // ½ÓÊÕÎļþ·½·¨
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return receive(path, false); // µ÷ÓýÓÊÕ·½·¨
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}
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private Path receive(Path path, boolean inDirectory) throws IOException { // ˽ÓнÓÊÕ·½·¨
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DataOutputStream dataOutput = null; // ÉùÃ÷Êý¾ÝÊä³öÁ÷
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Path filePath; // ÉùÃ÷Îļþ·¾¶
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try {
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CRC crc = new CRC16(); // ´´½¨CRC16¶ÔÏó
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int errorCount = 0; // ³õʼ»¯´íÎó¼ÆÊý
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// ´¦Àí¿é0
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byte[] block; // ÉùÃ÷Êý¾Ý¿éÊý×é
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int character; // ÉùÃ÷×Ö·û±äÁ¿
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while (true) { // Ñ»·´¦Àí¿é0
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character = modem.requestTransmissionStart(true); // ÇëÇó´«Ê俪ʼ
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try {
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// ´ÓÁã¿é¶ÁÈ¡ÎļþÃû
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block = modem.readBlock(0, (character == Modem.SOH), crc); // ¶ÁÈ¡¿é0
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if (inDirectory) { // Èç¹ûÔÚĿ¼ÖÐ
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StringBuilder sb = new StringBuilder(); // ´´½¨×Ö·û´®¹¹½¨Æ÷
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if (block[0] == 0) { // Èç¹û¿éÊ××Ö½ÚΪ0
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//ÕâÊÇÅúÁ¿Îļþ´«ÊäµÄÍ£Ö¹¿é
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modem.sendByte(Modem.ACK); // ·¢ËÍACK
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return null; // ·µ»Ønull
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}
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for (int i = 0; i < block.length; i++) { // ±éÀú¿éÊý¾Ý
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if (block[i] == 0) { // Èç¹ûÓöµ½0×Ö½Ú
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break; // Ìø³öÑ»·
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}
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sb.append((char) block[i]); // ×·¼Ó×Ö·ûµ½×Ö·û´®¹¹½¨Æ÷
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}
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filePath = path.resolve(sb.toString()); // ½âÎöÎļþ·¾¶
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} else { // ·ñÔò
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filePath = path; // Ö±½ÓʹÓ÷¾¶
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}
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dataOutput = new DataOutputStream(Files.newOutputStream(filePath)); // ´´½¨ÎļþÊä³öÁ÷
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modem.sendByte(Modem.ACK); // ·¢ËÍACK
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break; // Ìø³öÑ»·
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} catch (TimeoutException | Modem.InvalidBlockException e) { // ²¶»ñ³¬Ê±ºÍÎÞЧ¿éÒì³£
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errorCount++; // ´íÎó¼ÆÊýÔö¼Ó
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if (errorCount == Modem.MAXERRORS) { // Èç¹û´íÎó¼ÆÊý´ïµ½×î´óÖµ
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modem.interruptTransmission(); // Öжϴ«Êä
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throw new IOException("Transmission aborted, error count exceeded max"); // Å׳öIOÒì³£
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}
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modem.sendByte(Modem.NAK); // ·¢ËÍNAK
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} catch (Modem.RepeatedBlockException | Modem.SynchronizationLostException e) { // ²¶»ñÖظ´¿éºÍͬ²½¶ªÊ§Òì³£
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//ÖÂÃü´«Êä´íÎó
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modem.interruptTransmission(); // Öжϴ«Êä
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throw new IOException("Fatal transmission error", e); // Å׳öIOÒì³£
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}
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}
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//½ÓÊÕÊý¾Ý¿é
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modem.receive(filePath, true); // ½ÓÊÕÊý¾Ý¿é
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} finally {
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if (dataOutput != null) { // Èç¹ûÊý¾ÝÊä³öÁ÷²»Îª¿Õ
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dataOutput.close(); // ¹Ø±ÕÊý¾ÝÊä³öÁ÷
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}
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}
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return filePath; // ·µ»ØÎļþ·¾¶
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}
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public static int getSize() { // »ñÈ¡´óС·½·¨
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return size; // ·µ»Ø´óС
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}
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}
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