annotate src/com/five_ten_sg/connectbot/transport/Local.java @ 46:34ce32c4e807 tn5250

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author Carl Byington <carl@five-ten-sg.com>
date Wed, 11 Jun 2014 09:55:40 -0700
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children 77ac18bc1b2f
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1 /*
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2 * ConnectBot: simple, powerful, open-source SSH client for Android
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3 * Copyright 2007 Kenny Root, Jeffrey Sharkey
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4 *
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5 * Licensed under the Apache License, Version 2.0 (the "License");
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6 * you may not use this file except in compliance with the License.
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7 * You may obtain a copy of the License at
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8 *
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9 * http://www.apache.org/licenses/LICENSE-2.0
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10 *
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11 * Unless required by applicable law or agreed to in writing, software
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12 * distributed under the License is distributed on an "AS IS" BASIS,
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13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 * See the License for the specific language governing permissions and
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15 * limitations under the License.
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16 */
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17
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18 package com.five_ten_sg.connectbot.transport;
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19
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20 import java.io.FileDescriptor;
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21 import java.io.FileInputStream;
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22 import java.io.FileOutputStream;
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23 import java.io.IOException;
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24 import java.util.Map;
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25
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26 import com.five_ten_sg.connectbot.R;
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27 import com.five_ten_sg.connectbot.bean.HostBean;
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28 import com.five_ten_sg.connectbot.service.TerminalBridge;
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29 import com.five_ten_sg.connectbot.service.TerminalManager;
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30 import com.five_ten_sg.connectbot.util.HostDatabase;
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31 import android.content.Context;
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32 import android.net.Uri;
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33 import android.util.Log;
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34
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35 import com.google.ase.Exec;
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36
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37 /**
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38 * @author Kenny Root
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39 *
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40 */
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41 public class Local extends AbsTransport {
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42 private static final String TAG = "ConnectBot.Local";
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43 private static final String PROTOCOL = "local";
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44 private static final String DEFAULT_URI = "local:#Local";
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45
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46 private FileDescriptor shellFd;
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47 private FileInputStream is;
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48 private FileOutputStream os;
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49
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50 /**
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51 *
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52 */
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53 public Local() {
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54 }
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55
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56
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57 public static String getProtocolName() {
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58 return PROTOCOL;
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59 }
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60
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61
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62 public Uri getUri(String input) {
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63 Uri uri = Uri.parse(DEFAULT_URI);
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64
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65 if (input != null && input.length() > 0) {
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66 uri = uri.buildUpon().fragment(input).build();
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67 }
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68
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69 return uri;
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70 }
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72
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73 @Override
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74 public void connect() {
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75 int[] pids = new int[1];
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76
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77 try {
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78 shellFd = Exec.createSubprocess("/system/bin/sh", "-", null, pids);
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79 }
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80 catch (Exception e) {
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81 bridge.outputLine(manager.res.getString(R.string.local_shell_unavailable));
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82 Log.e(TAG, "Cannot start local shell", e);
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83 return;
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84 }
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85
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86 final int shellPid = pids[0];
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87 Runnable exitWatcher = new Runnable() {
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88 public void run() {
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89 Exec.waitFor(shellPid);
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90 bridge.dispatchDisconnect(false);
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91 }
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92 };
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93 Thread exitWatcherThread = new Thread(exitWatcher);
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94 exitWatcherThread.setName("LocalExitWatcher");
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95 exitWatcherThread.setDaemon(true);
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96 exitWatcherThread.start();
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97 is = new FileInputStream(shellFd);
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98 os = new FileOutputStream(shellFd);
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99 bridge.onConnected();
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100 }
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101
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102
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103 @Override
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104 public boolean willBlock() {
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105 if (is == null) return true;
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106 try {
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107 return is.available() == 0;
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108 } catch (Exception e) {
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109 return true;
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110 }
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111 }
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112
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113 @Override
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114 public int read(byte[] buffer, int start, int len) throws IOException {
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115 if (is == null) {
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116 bridge.dispatchDisconnect(false);
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117 throw new IOException("session closed");
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118 }
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119
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120 return is.read(buffer, start, len);
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121 }
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122
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123 @Override
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124 public void write(byte[] buffer) throws IOException {
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125 if (os != null)
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126 os.write(buffer);
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127 }
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128
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129 @Override
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130 public void write(int c) throws IOException {
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131 if (os != null)
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132 os.write(c);
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133 }
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134
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135 @Override
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136 public void flush() throws IOException {
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137 os.flush();
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138 }
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139
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140 @Override
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141 public void close() {
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142 try {
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143 if (os != null) {
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144 os.close();
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145 os = null;
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146 }
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147
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148 if (is != null) {
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149 is.close();
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150 is = null;
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151 }
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152 }
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153 catch (IOException e) {
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154 Log.e(TAG, "Couldn't close shell", e);
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155 }
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156 }
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157
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158 @Override
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159 public void setDimensions(int columns, int rows, int width, int height) {
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160 try {
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161 Exec.setPtyWindowSize(shellFd, rows, columns, width, height);
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162 }
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163 catch (Exception e) {
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164 Log.e(TAG, "Couldn't resize pty", e);
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165 }
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166 }
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167
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168 @Override
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169 public int getDefaultPort() {
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170 return 0;
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171 }
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172
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173 @Override
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174 public boolean isConnected() {
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175 return is != null && os != null;
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176 }
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177
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178 @Override
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179 public boolean isSessionOpen() {
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180 return isConnected();
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181 }
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182
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183 @Override
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184 public boolean isAuthenticated() {
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185 return isConnected();
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186 }
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187
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188 @Override
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189 public String getDefaultNickname(String username, String hostname, int port) {
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190 return DEFAULT_URI;
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191 }
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192
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193 @Override
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194 public void getSelectionArgs(Uri uri, Map<String, String> selection) {
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195 selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL);
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196 selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment());
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197 }
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198
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199 @Override
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200 public HostBean createHost(Uri uri) {
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201 HostBean host = new HostBean();
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202 host.setProtocol(PROTOCOL);
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203 String nickname = uri.getFragment();
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204
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205 if (nickname == null || nickname.length() == 0) {
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206 host.setNickname(getDefaultNickname(host.getUsername(),
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207 host.getHostname(), host.getPort()));
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208 }
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209 else {
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210 host.setNickname(uri.getFragment());
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211 }
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212
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213 return host;
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214 }
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215
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216 public String getFormatHint(Context context) {
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217 return context.getString(R.string.hostpref_nickname_title);
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218 }
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219
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220 @Override
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221 public boolean usesNetwork() {
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222 return false;
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223 }
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224 }