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examples.ftp |
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1 | /* |
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2 | * Copyright 2001-2005 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package examples; |
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17 | ||
18 | import java.io.FileInputStream; |
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19 | import java.io.FileOutputStream; |
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20 | import java.io.IOException; |
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21 | import java.io.InputStream; |
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22 | import java.io.OutputStream; |
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23 | import java.io.PrintWriter; |
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24 | import org.apache.commons.net.ftp.FTP; |
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25 | import org.apache.commons.net.ftp.FTPClient; |
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26 | import org.apache.commons.net.ftp.FTPConnectionClosedException; |
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27 | import org.apache.commons.net.ftp.FTPReply; |
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28 | ||
29 | /*** |
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30 | * This is an example program demonstrating how to use the FTPClient class. |
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31 | * This program connects to an FTP server and retrieves the specified |
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32 | * file. If the -s flag is used, it stores the local file at the FTP server. |
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33 | * Just so you can see what's happening, all reply strings are printed. |
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34 | * If the -b flag is used, a binary transfer is assumed (default is ASCII). |
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35 | * <p> |
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36 | * Usage: ftp [-s] [-b] <hostname> <username> <password> <remote file> <local file> |
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37 | * <p> |
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38 | ***/ |
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39 | 0 | public final class ftp |
40 | { |
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41 | ||
42 | public static final String USAGE = |
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43 | "Usage: ftp [-s] [-b] <hostname> <username> <password> <remote file> <local file>\n" + |
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44 | "\nDefault behavior is to download a file and use ASCII transfer mode.\n" + |
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45 | "\t-s store file on server (upload)\n" + |
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46 | "\t-b use binary transfer mode\n"; |
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47 | ||
48 | public static final void main(String[] args) |
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49 | { |
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50 | 0 | int base = 0; |
51 | 0 | boolean storeFile = false, binaryTransfer = false, error = false; |
52 | String server, username, password, remote, local; |
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53 | FTPClient ftp; |
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54 | ||
55 | 0 | for (base = 0; base < args.length; base++) |
56 | { |
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57 | 0 | if (args[base].startsWith("-s")) |
58 | 0 | storeFile = true; |
59 | 0 | else if (args[base].startsWith("-b")) |
60 | 0 | binaryTransfer = true; |
61 | else |
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62 | break; |
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63 | } |
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64 | ||
65 | 0 | if ((args.length - base) != 5) |
66 | { |
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67 | 0 | System.err.println(USAGE); |
68 | 0 | System.exit(1); |
69 | } |
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70 | ||
71 | 0 | server = args[base++]; |
72 | 0 | username = args[base++]; |
73 | 0 | password = args[base++]; |
74 | 0 | remote = args[base++]; |
75 | 0 | local = args[base]; |
76 | ||
77 | 0 | ftp = new FTPClient(); |
78 | 0 | ftp.addProtocolCommandListener(new PrintCommandListener( |
79 | new PrintWriter(System.out))); |
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80 | ||
81 | try |
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82 | { |
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83 | int reply; |
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84 | 0 | ftp.connect(server); |
85 | 0 | System.out.println("Connected to " + server + "."); |
86 | ||
87 | // After connection attempt, you should check the reply code to verify |
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88 | // success. |
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89 | 0 | reply = ftp.getReplyCode(); |
90 | ||
91 | 0 | if (!FTPReply.isPositiveCompletion(reply)) |
92 | { |
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93 | 0 | ftp.disconnect(); |
94 | 0 | System.err.println("FTP server refused connection."); |
95 | 0 | System.exit(1); |
96 | } |
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97 | } |
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98 | 0 | catch (IOException e) |
99 | { |
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100 | 0 | if (ftp.isConnected()) |
101 | { |
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102 | try |
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103 | { |
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104 | 0 | ftp.disconnect(); |
105 | } |
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106 | 0 | catch (IOException f) |
107 | { |
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108 | // do nothing |
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109 | 0 | } |
110 | } |
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111 | 0 | System.err.println("Could not connect to server."); |
112 | 0 | e.printStackTrace(); |
113 | 0 | System.exit(1); |
114 | 0 | } |
115 | ||
116 | __main: |
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117 | try |
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118 | { |
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119 | 0 | if (!ftp.login(username, password)) |
120 | { |
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121 | 0 | ftp.logout(); |
122 | 0 | error = true; |
123 | break __main; |
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124 | } |
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125 | ||
126 | 0 | System.out.println("Remote system is " + ftp.getSystemName()); |
127 | ||
128 | 0 | if (binaryTransfer) |
129 | 0 | ftp.setFileType(FTP.BINARY_FILE_TYPE); |
130 | ||
131 | // Use passive mode as default because most of us are |
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132 | // behind firewalls these days. |
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133 | 0 | ftp.enterLocalPassiveMode(); |
134 | ||
135 | 0 | if (storeFile) |
136 | { |
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137 | InputStream input; |
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138 | ||
139 | 0 | input = new FileInputStream(local); |
140 | ||
141 | 0 | ftp.storeFile(remote, input); |
142 | ||
143 | 0 | input.close(); |
144 | } |
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145 | else |
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146 | { |
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147 | OutputStream output; |
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148 | ||
149 | 0 | output = new FileOutputStream(local); |
150 | ||
151 | 0 | ftp.retrieveFile(remote, output); |
152 | ||
153 | 0 | output.close(); |
154 | } |
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155 | ||
156 | 0 | ftp.logout(); |
157 | } |
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158 | 0 | catch (FTPConnectionClosedException e) |
159 | { |
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160 | 0 | error = true; |
161 | 0 | System.err.println("Server closed connection."); |
162 | 0 | e.printStackTrace(); |
163 | } |
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164 | 0 | catch (IOException e) |
165 | { |
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166 | 0 | error = true; |
167 | 0 | e.printStackTrace(); |
168 | } |
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169 | finally |
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170 | { |
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171 | 0 | if (ftp.isConnected()) |
172 | { |
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173 | try |
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174 | { |
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175 | 0 | ftp.disconnect(); |
176 | } |
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177 | 0 | catch (IOException f) |
178 | { |
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179 | // do nothing |
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180 | 0 | } |
181 | } |
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182 | } |
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183 | ||
184 | 0 | System.exit(error ? 1 : 0); |
185 | 0 | } // end main |
186 | ||
187 | } |
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188 |
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