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1
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2 package com.trilead.ssh2;
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3
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4 import java.io.BufferedInputStream;
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5 import java.io.BufferedOutputStream;
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6 import java.io.File;
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7 import java.io.FileInputStream;
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8 import java.io.FileOutputStream;
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9 import java.io.IOException;
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10 import java.io.InputStream;
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11 import java.io.OutputStream;
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12
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13 /**
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14 * A very basic <code>SCPClient</code> that can be used to copy files from/to
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15 * the SSH-2 server. On the server side, the "scp" program must be in the PATH.
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16 * <p>
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17 * This scp client is thread safe - you can download (and upload) different sets
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18 * of files concurrently without any troubles. The <code>SCPClient</code> is
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19 * actually mapping every request to a distinct {@link Session}.
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20 *
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21 * @author Christian Plattner, plattner@trilead.com
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22 * @version $Id: SCPClient.java,v 1.2 2008/04/01 12:38:09 cplattne Exp $
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23 */
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24
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25 public class SCPClient {
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26 Connection conn;
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27
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28 class LenNamePair {
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29 long length;
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30 String filename;
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31 }
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32
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33 public SCPClient(Connection conn) {
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34 if (conn == null)
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35 throw new IllegalArgumentException("Cannot accept null argument!");
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36
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37 this.conn = conn;
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38 }
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39
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40 private void readResponse(InputStream is) throws IOException {
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41 int c = is.read();
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42
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43 if (c == 0)
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44 return;
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45
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46 if (c == -1)
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47 throw new IOException("Remote scp terminated unexpectedly.");
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48
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49 if ((c != 1) && (c != 2))
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50 throw new IOException("Remote scp sent illegal error code.");
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51
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52 if (c == 2)
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53 throw new IOException("Remote scp terminated with error.");
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54
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55 String err = receiveLine(is);
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56 throw new IOException("Remote scp terminated with error (" + err + ").");
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57 }
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58
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59 private String receiveLine(InputStream is) throws IOException {
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60 StringBuffer sb = new StringBuffer(30);
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61
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62 while (true) {
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63 /*
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64 * This is a random limit - if your path names are longer, then
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65 * adjust it
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66 */
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67 if (sb.length() > 8192)
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68 throw new IOException("Remote scp sent a too long line");
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69
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70 int c = is.read();
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71
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72 if (c < 0)
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73 throw new IOException("Remote scp terminated unexpectedly.");
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74
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75 if (c == '\n')
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76 break;
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77
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78 sb.append((char) c);
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79 }
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80
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81 return sb.toString();
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82 }
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83
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84 private LenNamePair parseCLine(String line) throws IOException {
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85 /* Minimum line: "xxxx y z" ---> 8 chars */
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86 long len;
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87
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88 if (line.length() < 8)
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89 throw new IOException("Malformed C line sent by remote SCP binary, line too short.");
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90
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91 if ((line.charAt(4) != ' ') || (line.charAt(5) == ' '))
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92 throw new IOException("Malformed C line sent by remote SCP binary.");
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93
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94 int length_name_sep = line.indexOf(' ', 5);
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95
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96 if (length_name_sep == -1)
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97 throw new IOException("Malformed C line sent by remote SCP binary.");
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98
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99 String length_substring = line.substring(5, length_name_sep);
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100 String name_substring = line.substring(length_name_sep + 1);
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101
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102 if ((length_substring.length() <= 0) || (name_substring.length() <= 0))
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103 throw new IOException("Malformed C line sent by remote SCP binary.");
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104
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105 if ((6 + length_substring.length() + name_substring.length()) != line.length())
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106 throw new IOException("Malformed C line sent by remote SCP binary.");
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107
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108 try {
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109 len = Long.parseLong(length_substring);
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110 }
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111 catch (NumberFormatException e) {
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112 throw new IOException("Malformed C line sent by remote SCP binary, cannot parse file length.");
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113 }
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114
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115 if (len < 0)
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116 throw new IOException("Malformed C line sent by remote SCP binary, illegal file length.");
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117
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118 LenNamePair lnp = new LenNamePair();
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119 lnp.length = len;
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120 lnp.filename = name_substring;
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121 return lnp;
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122 }
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123
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124 private void sendBytes(Session sess, byte[] data, String fileName, String mode) throws IOException {
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125 OutputStream os = sess.getStdin();
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126 InputStream is = new BufferedInputStream(sess.getStdout(), 512);
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127 readResponse(is);
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128 String cline = "C" + mode + " " + data.length + " " + fileName + "\n";
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129 os.write(cline.getBytes("ISO-8859-1"));
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130 os.flush();
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131 readResponse(is);
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132 os.write(data, 0, data.length);
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133 os.write(0);
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134 os.flush();
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135 readResponse(is);
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136 os.write("E\n".getBytes("ISO-8859-1"));
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137 os.flush();
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138 }
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139
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140 private void sendFiles(Session sess, String[] files, String[] remoteFiles, String mode) throws IOException {
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141 byte[] buffer = new byte[8192];
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142 OutputStream os = new BufferedOutputStream(sess.getStdin(), 40000);
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143 InputStream is = new BufferedInputStream(sess.getStdout(), 512);
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144 readResponse(is);
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145
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146 for (int i = 0; i < files.length; i++) {
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147 File f = new File(files[i]);
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148 long remain = f.length();
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149 String remoteName;
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150
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151 if ((remoteFiles != null) && (remoteFiles.length > i) && (remoteFiles[i] != null))
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152 remoteName = remoteFiles[i];
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153 else
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154 remoteName = f.getName();
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155
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156 String cline = "C" + mode + " " + remain + " " + remoteName + "\n";
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157 os.write(cline.getBytes("ISO-8859-1"));
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158 os.flush();
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159 readResponse(is);
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160 FileInputStream fis = null;
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161
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162 try {
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163 fis = new FileInputStream(f);
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164
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165 while (remain > 0) {
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166 int trans;
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167
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168 if (remain > buffer.length)
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169 trans = buffer.length;
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170 else
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171 trans = (int) remain;
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172
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173 if (fis.read(buffer, 0, trans) != trans)
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174 throw new IOException("Cannot read enough from local file " + files[i]);
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175
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176 os.write(buffer, 0, trans);
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177 remain -= trans;
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178 }
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179 }
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180 finally {
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181 if (fis != null)
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182 fis.close();
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183 }
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184
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185 os.write(0);
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186 os.flush();
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187 readResponse(is);
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188 }
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189
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190 os.write("E\n".getBytes("ISO-8859-1"));
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191 os.flush();
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192 }
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193
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194 private void receiveFiles(Session sess, OutputStream[] targets) throws IOException {
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195 byte[] buffer = new byte[8192];
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196 OutputStream os = new BufferedOutputStream(sess.getStdin(), 512);
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197 InputStream is = new BufferedInputStream(sess.getStdout(), 40000);
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198 os.write(0x0);
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199 os.flush();
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200
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201 for (int i = 0; i < targets.length; i++) {
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202 LenNamePair lnp = null;
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203
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204 while (true) {
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205 int c = is.read();
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206
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207 if (c < 0)
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208 throw new IOException("Remote scp terminated unexpectedly.");
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209
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210 String line = receiveLine(is);
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211
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212 if (c == 'T') {
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213 /* Ignore modification times */
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214 continue;
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215 }
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216
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217 if ((c == 1) || (c == 2))
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218 throw new IOException("Remote SCP error: " + line);
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219
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220 if (c == 'C') {
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221 lnp = parseCLine(line);
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222 break;
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223 }
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224
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225 throw new IOException("Remote SCP error: " + ((char) c) + line);
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226 }
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227
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228 os.write(0x0);
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229 os.flush();
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230 long remain = lnp.length;
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231
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232 while (remain > 0) {
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233 int trans;
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234
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235 if (remain > buffer.length)
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236 trans = buffer.length;
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237 else
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238 trans = (int) remain;
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239
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240 int this_time_received = is.read(buffer, 0, trans);
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241
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242 if (this_time_received < 0) {
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243 throw new IOException("Remote scp terminated connection unexpectedly");
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244 }
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245
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246 targets[i].write(buffer, 0, this_time_received);
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247 remain -= this_time_received;
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248 }
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249
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250 readResponse(is);
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251 os.write(0x0);
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252 os.flush();
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253 }
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254 }
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255
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256 private void receiveFiles(Session sess, String[] files, String target) throws IOException {
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257 byte[] buffer = new byte[8192];
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258 OutputStream os = new BufferedOutputStream(sess.getStdin(), 512);
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259 InputStream is = new BufferedInputStream(sess.getStdout(), 40000);
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260 os.write(0x0);
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261 os.flush();
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262
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263 for (int i = 0; i < files.length; i++) {
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264 LenNamePair lnp = null;
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265
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266 while (true) {
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267 int c = is.read();
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268
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269 if (c < 0)
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270 throw new IOException("Remote scp terminated unexpectedly.");
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271
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272 String line = receiveLine(is);
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273
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274 if (c == 'T') {
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275 /* Ignore modification times */
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276 continue;
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277 }
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278
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279 if ((c == 1) || (c == 2))
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280 throw new IOException("Remote SCP error: " + line);
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281
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282 if (c == 'C') {
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283 lnp = parseCLine(line);
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284 break;
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285 }
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286
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287 throw new IOException("Remote SCP error: " + ((char) c) + line);
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288 }
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289
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290 os.write(0x0);
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291 os.flush();
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292 File f = new File(target + File.separatorChar + lnp.filename);
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293 FileOutputStream fop = null;
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294
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295 try {
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296 fop = new FileOutputStream(f);
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297 long remain = lnp.length;
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298
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299 while (remain > 0) {
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300 int trans;
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301
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302 if (remain > buffer.length)
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303 trans = buffer.length;
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304 else
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305 trans = (int) remain;
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306
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307 int this_time_received = is.read(buffer, 0, trans);
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308
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309 if (this_time_received < 0) {
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310 throw new IOException("Remote scp terminated connection unexpectedly");
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311 }
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312
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313 fop.write(buffer, 0, this_time_received);
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314 remain -= this_time_received;
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315 }
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316 }
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317 finally {
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318 if (fop != null)
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319 fop.close();
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320 }
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321
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322 readResponse(is);
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323 os.write(0x0);
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324 os.flush();
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325 }
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326 }
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327
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328 /**
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329 * Copy a local file to a remote directory, uses mode 0600 when creating the
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330 * file on the remote side.
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331 *
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332 * @param localFile
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333 * Path and name of local file.
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334 * @param remoteTargetDirectory
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335 * Remote target directory. Use an empty string to specify the
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336 * default directory.
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337 *
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338 * @throws IOException
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339 */
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340 public void put(String localFile, String remoteTargetDirectory) throws IOException {
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341 put(new String[] { localFile }, remoteTargetDirectory, "0600");
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342 }
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343
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344 /**
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345 * Copy a set of local files to a remote directory, uses mode 0600 when
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346 * creating files on the remote side.
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347 *
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348 * @param localFiles
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349 * Paths and names of local file names.
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350 * @param remoteTargetDirectory
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351 * Remote target directory. Use an empty string to specify the
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352 * default directory.
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353 *
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354 * @throws IOException
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355 */
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356
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357 public void put(String[] localFiles, String remoteTargetDirectory) throws IOException {
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358 put(localFiles, remoteTargetDirectory, "0600");
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359 }
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360
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361 /**
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362 * Copy a local file to a remote directory, uses the specified mode when
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363 * creating the file on the remote side.
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364 *
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365 * @param localFile
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366 * Path and name of local file.
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367 * @param remoteTargetDirectory
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368 * Remote target directory. Use an empty string to specify the
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369 * default directory.
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370 * @param mode
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371 * a four digit string (e.g., 0644, see "man chmod", "man open")
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372 * @throws IOException
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373 */
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374 public void put(String localFile, String remoteTargetDirectory, String mode) throws IOException {
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375 put(new String[] { localFile }, remoteTargetDirectory, mode);
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376 }
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377
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378 /**
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379 * Copy a local file to a remote directory, uses the specified mode and
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380 * remote filename when creating the file on the remote side.
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381 *
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382 * @param localFile
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383 * Path and name of local file.
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384 * @param remoteFileName
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385 * The name of the file which will be created in the remote
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386 * target directory.
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387 * @param remoteTargetDirectory
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388 * Remote target directory. Use an empty string to specify the
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389 * default directory.
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390 * @param mode
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391 * a four digit string (e.g., 0644, see "man chmod", "man open")
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392 * @throws IOException
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393 */
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394 public void put(String localFile, String remoteFileName, String remoteTargetDirectory, String mode)
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395 throws IOException {
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396 put(new String[] { localFile }, new String[] { remoteFileName }, remoteTargetDirectory, mode);
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397 }
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398
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399 /**
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400 * Create a remote file and copy the contents of the passed byte array into
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401 * it. Uses mode 0600 for creating the remote file.
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402 *
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403 * @param data
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404 * the data to be copied into the remote file.
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405 * @param remoteFileName
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406 * The name of the file which will be created in the remote
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407 * target directory.
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408 * @param remoteTargetDirectory
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409 * Remote target directory. Use an empty string to specify the
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410 * default directory.
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411 * @throws IOException
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412 */
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413
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414 public void put(byte[] data, String remoteFileName, String remoteTargetDirectory) throws IOException {
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415 put(data, remoteFileName, remoteTargetDirectory, "0600");
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416 }
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417
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418 /**
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419 * Create a remote file and copy the contents of the passed byte array into
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420 * it. The method use the specified mode when creating the file on the
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421 * remote side.
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422 *
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423 * @param data
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424 * the data to be copied into the remote file.
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425 * @param remoteFileName
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426 * The name of the file which will be created in the remote
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427 * target directory.
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428 * @param remoteTargetDirectory
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429 * Remote target directory. Use an empty string to specify the
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430 * default directory.
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431 * @param mode
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432 * a four digit string (e.g., 0644, see "man chmod", "man open")
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433 * @throws IOException
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434 */
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435 public void put(byte[] data, String remoteFileName, String remoteTargetDirectory, String mode) throws IOException {
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436 Session sess = null;
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437
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438 if ((remoteFileName == null) || (remoteTargetDirectory == null) || (mode == null))
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439 throw new IllegalArgumentException("Null argument.");
|
|
|
440
|
|
|
441 if (mode.length() != 4)
|
|
|
442 throw new IllegalArgumentException("Invalid mode.");
|
|
|
443
|
|
|
444 for (int i = 0; i < mode.length(); i++)
|
|
|
445 if (Character.isDigit(mode.charAt(i)) == false)
|
|
|
446 throw new IllegalArgumentException("Invalid mode.");
|
|
|
447
|
|
|
448 remoteTargetDirectory = remoteTargetDirectory.trim();
|
|
|
449 remoteTargetDirectory = (remoteTargetDirectory.length() > 0) ? remoteTargetDirectory : ".";
|
|
|
450 String cmd = "scp -t -d " + remoteTargetDirectory;
|
|
|
451
|
|
|
452 try {
|
|
|
453 sess = conn.openSession();
|
|
|
454 sess.execCommand(cmd);
|
|
|
455 sendBytes(sess, data, remoteFileName, mode);
|
|
|
456 }
|
|
|
457 catch (IOException e) {
|
|
|
458 throw(IOException) new IOException("Error during SCP transfer.").initCause(e);
|
|
|
459 }
|
|
|
460 finally {
|
|
|
461 if (sess != null)
|
|
|
462 sess.close();
|
|
|
463 }
|
|
|
464 }
|
|
|
465
|
|
|
466 /**
|
|
|
467 * Copy a set of local files to a remote directory, uses the specified mode
|
|
|
468 * when creating the files on the remote side.
|
|
|
469 *
|
|
|
470 * @param localFiles
|
|
|
471 * Paths and names of the local files.
|
|
|
472 * @param remoteTargetDirectory
|
|
|
473 * Remote target directory. Use an empty string to specify the
|
|
|
474 * default directory.
|
|
|
475 * @param mode
|
|
|
476 * a four digit string (e.g., 0644, see "man chmod", "man open")
|
|
|
477 * @throws IOException
|
|
|
478 */
|
|
|
479 public void put(String[] localFiles, String remoteTargetDirectory, String mode) throws IOException {
|
|
|
480 put(localFiles, null, remoteTargetDirectory, mode);
|
|
|
481 }
|
|
|
482
|
|
|
483 public void put(String[] localFiles, String[] remoteFiles, String remoteTargetDirectory, String mode)
|
|
|
484 throws IOException {
|
|
|
485 Session sess = null;
|
|
|
486
|
|
|
487 /*
|
|
|
488 * remoteFiles may be null, indicating that the local filenames shall be
|
|
|
489 * used
|
|
|
490 */
|
|
|
491
|
|
|
492 if ((localFiles == null) || (remoteTargetDirectory == null) || (mode == null))
|
|
|
493 throw new IllegalArgumentException("Null argument.");
|
|
|
494
|
|
|
495 if (mode.length() != 4)
|
|
|
496 throw new IllegalArgumentException("Invalid mode.");
|
|
|
497
|
|
|
498 for (int i = 0; i < mode.length(); i++)
|
|
|
499 if (Character.isDigit(mode.charAt(i)) == false)
|
|
|
500 throw new IllegalArgumentException("Invalid mode.");
|
|
|
501
|
|
|
502 if (localFiles.length == 0)
|
|
|
503 return;
|
|
|
504
|
|
|
505 remoteTargetDirectory = remoteTargetDirectory.trim();
|
|
|
506 remoteTargetDirectory = (remoteTargetDirectory.length() > 0) ? remoteTargetDirectory : ".";
|
|
|
507 String cmd = "scp -t -d " + remoteTargetDirectory;
|
|
|
508
|
|
|
509 for (int i = 0; i < localFiles.length; i++) {
|
|
|
510 if (localFiles[i] == null)
|
|
|
511 throw new IllegalArgumentException("Cannot accept null filename.");
|
|
|
512 }
|
|
|
513
|
|
|
514 try {
|
|
|
515 sess = conn.openSession();
|
|
|
516 sess.execCommand(cmd);
|
|
|
517 sendFiles(sess, localFiles, remoteFiles, mode);
|
|
|
518 }
|
|
|
519 catch (IOException e) {
|
|
|
520 throw(IOException) new IOException("Error during SCP transfer.").initCause(e);
|
|
|
521 }
|
|
|
522 finally {
|
|
|
523 if (sess != null)
|
|
|
524 sess.close();
|
|
|
525 }
|
|
|
526 }
|
|
|
527
|
|
|
528 /**
|
|
|
529 * Download a file from the remote server to a local directory.
|
|
|
530 *
|
|
|
531 * @param remoteFile
|
|
|
532 * Path and name of the remote file.
|
|
|
533 * @param localTargetDirectory
|
|
|
534 * Local directory to put the downloaded file.
|
|
|
535 *
|
|
|
536 * @throws IOException
|
|
|
537 */
|
|
|
538 public void get(String remoteFile, String localTargetDirectory) throws IOException {
|
|
|
539 get(new String[] { remoteFile }, localTargetDirectory);
|
|
|
540 }
|
|
|
541
|
|
|
542 /**
|
|
|
543 * Download a file from the remote server and pipe its contents into an
|
|
|
544 * <code>OutputStream</code>. Please note that, to enable flexible usage
|
|
|
545 * of this method, the <code>OutputStream</code> will not be closed nor
|
|
|
546 * flushed.
|
|
|
547 *
|
|
|
548 * @param remoteFile
|
|
|
549 * Path and name of the remote file.
|
|
|
550 * @param target
|
|
|
551 * OutputStream where the contents of the file will be sent to.
|
|
|
552 * @throws IOException
|
|
|
553 */
|
|
|
554 public void get(String remoteFile, OutputStream target) throws IOException {
|
|
|
555 get(new String[] { remoteFile }, new OutputStream[] { target });
|
|
|
556 }
|
|
|
557
|
|
|
558 private void get(String remoteFiles[], OutputStream[] targets) throws IOException {
|
|
|
559 Session sess = null;
|
|
|
560
|
|
|
561 if ((remoteFiles == null) || (targets == null))
|
|
|
562 throw new IllegalArgumentException("Null argument.");
|
|
|
563
|
|
|
564 if (remoteFiles.length != targets.length)
|
|
|
565 throw new IllegalArgumentException("Length of arguments does not match.");
|
|
|
566
|
|
|
567 if (remoteFiles.length == 0)
|
|
|
568 return;
|
|
|
569
|
|
|
570 String cmd = "scp -f";
|
|
|
571
|
|
|
572 for (int i = 0; i < remoteFiles.length; i++) {
|
|
|
573 if (remoteFiles[i] == null)
|
|
|
574 throw new IllegalArgumentException("Cannot accept null filename.");
|
|
|
575
|
|
|
576 String tmp = remoteFiles[i].trim();
|
|
|
577
|
|
|
578 if (tmp.length() == 0)
|
|
|
579 throw new IllegalArgumentException("Cannot accept empty filename.");
|
|
|
580
|
|
|
581 cmd += (" " + tmp);
|
|
|
582 }
|
|
|
583
|
|
|
584 try {
|
|
|
585 sess = conn.openSession();
|
|
|
586 sess.execCommand(cmd);
|
|
|
587 receiveFiles(sess, targets);
|
|
|
588 }
|
|
|
589 catch (IOException e) {
|
|
|
590 throw(IOException) new IOException("Error during SCP transfer.").initCause(e);
|
|
|
591 }
|
|
|
592 finally {
|
|
|
593 if (sess != null)
|
|
|
594 sess.close();
|
|
|
595 }
|
|
|
596 }
|
|
|
597
|
|
|
598 /**
|
|
|
599 * Download a set of files from the remote server to a local directory.
|
|
|
600 *
|
|
|
601 * @param remoteFiles
|
|
|
602 * Paths and names of the remote files.
|
|
|
603 * @param localTargetDirectory
|
|
|
604 * Local directory to put the downloaded files.
|
|
|
605 *
|
|
|
606 * @throws IOException
|
|
|
607 */
|
|
|
608 public void get(String remoteFiles[], String localTargetDirectory) throws IOException {
|
|
|
609 Session sess = null;
|
|
|
610
|
|
|
611 if ((remoteFiles == null) || (localTargetDirectory == null))
|
|
|
612 throw new IllegalArgumentException("Null argument.");
|
|
|
613
|
|
|
614 if (remoteFiles.length == 0)
|
|
|
615 return;
|
|
|
616
|
|
|
617 String cmd = "scp -f";
|
|
|
618
|
|
|
619 for (int i = 0; i < remoteFiles.length; i++) {
|
|
|
620 if (remoteFiles[i] == null)
|
|
|
621 throw new IllegalArgumentException("Cannot accept null filename.");
|
|
|
622
|
|
|
623 String tmp = remoteFiles[i].trim();
|
|
|
624
|
|
|
625 if (tmp.length() == 0)
|
|
|
626 throw new IllegalArgumentException("Cannot accept empty filename.");
|
|
|
627
|
|
|
628 cmd += (" " + tmp);
|
|
|
629 }
|
|
|
630
|
|
|
631 try {
|
|
|
632 sess = conn.openSession();
|
|
|
633 sess.execCommand(cmd);
|
|
|
634 receiveFiles(sess, remoteFiles, localTargetDirectory);
|
|
|
635 }
|
|
|
636 catch (IOException e) {
|
|
|
637 throw(IOException) new IOException("Error during SCP transfer.").initCause(e);
|
|
|
638 }
|
|
|
639 finally {
|
|
|
640 if (sess != null)
|
|
|
641 sess.close();
|
|
|
642 }
|
|
|
643 }
|
|
|
644 }
|
