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annotate src/ch/ethz/ssh2/SCPInputStream.java @ 273:91a31873c42a ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 11:21:46 -0700
parents
children 071eccdff8ea
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Carl Byington <carl@five-ten-sg.com>
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1 /*
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2 * Copyright (c) 2011 David Kocher. All rights reserved.
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3 * Please refer to the LICENSE.txt for licensing details.
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4 */
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5 package ch.ethz.ssh2;
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6
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7 import java.io.BufferedInputStream;
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8 import java.io.BufferedOutputStream;
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9 import java.io.IOException;
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10 import java.io.OutputStream;
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11
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12 /**
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13 * @version $Id: SCPInputStream.java 151 2014-04-28 10:03:39Z dkocher@sudo.ch $
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14 */
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15 public class SCPInputStream extends BufferedInputStream
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16 {
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17 private Session session;
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18
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19 /**
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20 * Bytes remaining to be read from the stream
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21 */
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22 private long remaining;
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23
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24 public SCPInputStream(SCPClient client, Session session) throws IOException
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25 {
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26 super(session.getStdout());
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27
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28 this.session = session;
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29
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30 OutputStream os = new BufferedOutputStream(session.getStdin(), 512);
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31
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32 os.write(0x0);
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33 os.flush();
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34
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35 final SCPClient.LenNamePair lnp;
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36
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37 while (true)
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38 {
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39 int c = session.getStdout().read();
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40 if (c < 0)
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41 {
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42 throw new IOException("Remote scp terminated unexpectedly.");
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43 }
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44
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45 String line = client.receiveLine(session.getStdout());
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46
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47 if (c == 'T')
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48 {
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49 /* Ignore modification times */
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50 continue;
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51 }
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52
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53 if ((c == 1) || (c == 2))
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54 {
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55 throw new IOException("Remote SCP error: " + line);
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56 }
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57
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58 if (c == 'C')
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59 {
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60 lnp = client.parseCLine(line);
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61 break;
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62
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63 }
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64 throw new IOException("Remote SCP error: " + ((char) c) + line);
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65 }
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66
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67 os.write(0x0);
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68 os.flush();
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69
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70 this.remaining = lnp.length;
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71 }
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72
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73 @Override
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74 public int read() throws IOException
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75 {
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76 if (!(remaining > 0))
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77 {
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78 return -1;
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79 }
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80
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81 int b = super.read();
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82 if (b < 0)
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83 {
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84 throw new IOException("Remote scp terminated connection unexpectedly");
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85 }
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86
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87 remaining -= 1;
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88
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89 return b;
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90 }
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91
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92 @Override
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93 public int read(byte b[], int off, int len) throws IOException
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94 {
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95 if (!(remaining > 0))
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96 {
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97 return -1;
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98 }
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99
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100 int trans = (int) remaining;
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101 if (remaining > len)
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102 {
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103 trans = len;
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104 }
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105
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106 int read = super.read(b, off, trans);
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107 if (read < 0)
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108 {
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109 throw new IOException("Remote scp terminated connection unexpectedly");
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110 }
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111
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112 remaining -= read;
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113
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114 return read;
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115 }
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116
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117 @Override
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118 public void close() throws IOException
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119 {
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120 try
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121 {
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122 session.getStdin().write(0x0);
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123 session.getStdin().flush();
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124 }
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125 finally
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126 {
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127 if (session != null)
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128 {
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129 session.close();
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130 }
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131 }
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132 }
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133 }