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annotate src/org/tmatesoft/hg/repo/HgRemoteRepository.java @ 215:41a778e3fd31

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Issue 5: Facilities for progress and cancellation. More specific exceptions. Exceptions from callbacks as RuntimeException
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 17 May 2011 00:56:54 +0200
parents 6a2481866491
children 9fb50c04f03c
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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19 import java.io.File;
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20 import java.io.FileOutputStream;
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21 import java.io.IOException;
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22 import java.io.InputStream;
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23 import java.io.InputStreamReader;
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24 import java.io.OutputStream;
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25 import java.io.StreamTokenizer;
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26 import java.net.HttpURLConnection;
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27 import java.net.MalformedURLException;
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28 import java.net.URL;
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29 import java.net.URLConnection;
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30 import java.security.cert.CertificateException;
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31 import java.security.cert.X509Certificate;
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32 import java.util.ArrayList;
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33 import java.util.Collection;
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34 import java.util.Collections;
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35 import java.util.Iterator;
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36 import java.util.LinkedHashMap;
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37 import java.util.LinkedList;
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38 import java.util.List;
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39 import java.util.Map;
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40 import java.util.prefs.BackingStoreException;
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41 import java.util.prefs.Preferences;
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42 import java.util.zip.InflaterInputStream;
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43
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44 import javax.net.ssl.HttpsURLConnection;
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45 import javax.net.ssl.SSLContext;
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46 import javax.net.ssl.TrustManager;
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47 import javax.net.ssl.X509TrustManager;
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48
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49 import org.tmatesoft.hg.core.HgBadArgumentException;
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50 import org.tmatesoft.hg.core.HgBadStateException;
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51 import org.tmatesoft.hg.core.HgRemoteConnectionException;
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52 import org.tmatesoft.hg.core.Nodeid;
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53
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54 /**
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55 * WORK IN PROGRESS, DO NOT USE
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56 *
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57 * @see http://mercurial.selenic.com/wiki/WireProtocol
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58 *
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59 * @author Artem Tikhomirov
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60 * @author TMate Software Ltd.
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61 */
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62 public class HgRemoteRepository {
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63
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64 private final URL url;
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65 private final SSLContext sslContext;
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66 private final String authInfo;
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67 private final boolean debug = Boolean.parseBoolean(System.getProperty("hg4j.remote.debug"));
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68 private HgLookup lookupHelper;
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69
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70 HgRemoteRepository(URL url) throws HgBadArgumentException {
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71 if (url == null) {
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72 throw new IllegalArgumentException();
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73 }
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74 this.url = url;
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75 if ("https".equals(url.getProtocol())) {
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76 try {
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77 sslContext = SSLContext.getInstance("SSL");
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78 class TrustEveryone implements X509TrustManager {
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79 public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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80 if (debug) {
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81 System.out.println("checkClientTrusted:" + authType);
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82 }
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83 }
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84 public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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85 if (debug) {
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86 System.out.println("checkServerTrusted:" + authType);
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87 }
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88 }
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89 public X509Certificate[] getAcceptedIssuers() {
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90 return new X509Certificate[0];
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91 }
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92 };
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93 sslContext.init(null, new TrustManager[] { new TrustEveryone() }, null);
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94 } catch (Exception ex) {
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95 throw new HgBadArgumentException("Can't initialize secure connection", ex);
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96 }
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97 } else {
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98 sslContext = null;
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99 }
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100 if (url.getUserInfo() != null) {
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101 String ai = null;
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102 try {
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103 // Hack to get Base64-encoded credentials
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104 Preferences tempNode = Preferences.userRoot().node("xxx");
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105 tempNode.putByteArray("xxx", url.getUserInfo().getBytes());
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106 ai = tempNode.get("xxx", null);
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107 tempNode.removeNode();
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108 } catch (BackingStoreException ex) {
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109 ex.printStackTrace();
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110 // IGNORE
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111 }
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112 authInfo = ai;
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113 } else {
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114 authInfo = null;
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115 }
171
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116 }
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117
215
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118 public boolean isInvalid() throws HgRemoteConnectionException {
181
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119 // say hello to server, check response
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120 if (Boolean.FALSE.booleanValue()) {
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121 throw HgRepository.notImplemented();
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122 }
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123 return false; // FIXME
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124 }
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125
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126 /**
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127 * @return human-readable address of the server, without user credentials or any other security information
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128 */
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129 public String getLocation() {
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130 if (url.getUserInfo() == null) {
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131 return url.toExternalForm();
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132 }
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133 if (url.getPort() != -1) {
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134 return String.format("%s://%s:%d%s", url.getProtocol(), url.getHost(), url.getPort(), url.getPath());
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135 } else {
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136 return String.format("%s://%s%s", url.getProtocol(), url.getHost(), url.getPath());
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137 }
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138 }
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139
215
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140 public List<Nodeid> heads() throws HgRemoteConnectionException {
178
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141 try {
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142 URL u = new URL(url, url.getPath() + "?cmd=heads");
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143 HttpURLConnection c = setupConnection(u.openConnection());
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144 c.connect();
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145 if (debug) {
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146 dumpResponseHeader(u, c);
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147 }
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148 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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149 StreamTokenizer st = new StreamTokenizer(is);
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150 st.ordinaryChars('0', '9');
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151 st.wordChars('0', '9');
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152 st.eolIsSignificant(false);
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153 LinkedList<Nodeid> parseResult = new LinkedList<Nodeid>();
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154 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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155 parseResult.add(Nodeid.fromAscii(st.sval));
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156 }
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157 return parseResult;
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158 } catch (MalformedURLException ex) {
215
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159 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("heads").setServerInfo(getLocation());
178
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160 } catch (IOException ex) {
215
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161 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("heads").setServerInfo(getLocation());
178
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162 }
171
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163 }
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164
215
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165 public List<Nodeid> between(Nodeid tip, Nodeid base) throws HgRemoteConnectionException {
177
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166 Range r = new Range(base, tip);
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167 // XXX shall handle errors like no range key in the returned map, not sure how.
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168 return between(Collections.singletonList(r)).get(r);
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169 }
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170
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171 /**
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172 * @param ranges
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173 * @return map, where keys are input instances, values are corresponding server reply
215
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174 * @throws HgRemoteConnectionException
177
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175 */
215
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176 public Map<Range, List<Nodeid>> between(Collection<Range> ranges) throws HgRemoteConnectionException {
177
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177 if (ranges.isEmpty()) {
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178 return Collections.emptyMap();
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179 }
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180 // if fact, shall do other way round, this method shall send
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181 LinkedHashMap<Range, List<Nodeid>> rv = new LinkedHashMap<HgRemoteRepository.Range, List<Nodeid>>(ranges.size() * 4 / 3);
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182 StringBuilder sb = new StringBuilder(20 + ranges.size() * 82);
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183 sb.append("pairs=");
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184 for (Range r : ranges) {
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185 sb.append(r.end.toString());
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186 sb.append('-');
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187 sb.append(r.start.toString());
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188 sb.append('+');
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189 }
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190 if (sb.charAt(sb.length() - 1) == '+') {
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191 // strip last space
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192 sb.setLength(sb.length() - 1);
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193 }
176
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194 try {
177
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195 boolean usePOST = ranges.size() > 3;
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196 URL u = new URL(url, url.getPath() + "?cmd=between" + (usePOST ? "" : '&' + sb.toString()));
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197 HttpURLConnection c = setupConnection(u.openConnection());
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198 if (usePOST) {
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199 c.setRequestMethod("POST");
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200 c.setRequestProperty("Content-Length", String.valueOf(sb.length()/*nodeids are ASCII, bytes == characters */));
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201 c.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
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202 c.setDoOutput(true);
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203 c.connect();
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204 OutputStream os = c.getOutputStream();
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205 os.write(sb.toString().getBytes());
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206 os.flush();
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207 os.close();
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208 } else {
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209 c.connect();
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210 }
178
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211 if (debug) {
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212 System.out.printf("%d ranges, method:%s \n", ranges.size(), c.getRequestMethod());
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213 dumpResponseHeader(u, c);
176
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214 }
177
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215 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
176
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216 StreamTokenizer st = new StreamTokenizer(is);
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217 st.ordinaryChars('0', '9');
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218 st.wordChars('0', '9');
177
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219 st.eolIsSignificant(true);
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220 Iterator<Range> rangeItr = ranges.iterator();
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221 LinkedList<Nodeid> currRangeList = null;
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222 Range currRange = null;
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223 boolean possiblyEmptyNextLine = true;
176
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224 while (st.nextToken() != StreamTokenizer.TT_EOF) {
177
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225 if (st.ttype == StreamTokenizer.TT_EOL) {
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226 if (possiblyEmptyNextLine) {
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227 // newline follows newline;
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228 assert currRange == null;
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229 assert currRangeList == null;
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230 if (!rangeItr.hasNext()) {
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231 throw new HgBadStateException();
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232 }
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233 rv.put(rangeItr.next(), Collections.<Nodeid>emptyList());
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234 } else {
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235 if (currRange == null || currRangeList == null) {
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236 throw new HgBadStateException();
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237 }
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238 // indicate next range value is needed
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239 currRange = null;
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240 currRangeList = null;
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241 possiblyEmptyNextLine = true;
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242 }
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243 } else {
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244 possiblyEmptyNextLine = false;
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245 if (currRange == null) {
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246 if (!rangeItr.hasNext()) {
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247 throw new HgBadStateException();
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248 }
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249 currRange = rangeItr.next();
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250 currRangeList = new LinkedList<Nodeid>();
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251 rv.put(currRange, currRangeList);
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252 }
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253 Nodeid nid = Nodeid.fromAscii(st.sval);
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254 currRangeList.addLast(nid);
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255 }
176
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256 }
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diff changeset
257 is.close();
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258 return rv;
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259 } catch (MalformedURLException ex) {
215
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260 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("between").setServerInfo(getLocation());
176
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261 } catch (IOException ex) {
215
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262 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("between").setServerInfo(getLocation());
176
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263 }
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264 }
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265
215
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266 public List<RemoteBranch> branches(List<Nodeid> nodes) throws HgRemoteConnectionException {
178
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267 StringBuilder sb = new StringBuilder(20 + nodes.size() * 41);
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268 sb.append("nodes=");
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diff changeset
269 for (Nodeid n : nodes) {
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270 sb.append(n.toString());
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271 sb.append('+');
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diff changeset
272 }
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diff changeset
273 if (sb.charAt(sb.length() - 1) == '+') {
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diff changeset
274 // strip last space
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diff changeset
275 sb.setLength(sb.length() - 1);
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diff changeset
276 }
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diff changeset
277 try {
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diff changeset
278 URL u = new URL(url, url.getPath() + "?cmd=branches&" + sb.toString());
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diff changeset
279 HttpURLConnection c = setupConnection(u.openConnection());
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280 c.connect();
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diff changeset
281 if (debug) {
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diff changeset
282 dumpResponseHeader(u, c);
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diff changeset
283 }
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diff changeset
284 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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diff changeset
285 StreamTokenizer st = new StreamTokenizer(is);
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diff changeset
286 st.ordinaryChars('0', '9');
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287 st.wordChars('0', '9');
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diff changeset
288 st.eolIsSignificant(false);
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diff changeset
289 ArrayList<Nodeid> parseResult = new ArrayList<Nodeid>(nodes.size() * 4);
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diff changeset
290 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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291 parseResult.add(Nodeid.fromAscii(st.sval));
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diff changeset
292 }
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diff changeset
293 if (parseResult.size() != nodes.size() * 4) {
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294 throw new HgRemoteConnectionException(String.format("Bad number of nodeids in result (shall be factor 4), expected %d, got %d", nodes.size()*4, parseResult.size()));
178
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diff changeset
295 }
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diff changeset
296 ArrayList<RemoteBranch> rv = new ArrayList<RemoteBranch>(nodes.size());
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297 for (int i = 0; i < nodes.size(); i++) {
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298 RemoteBranch rb = new RemoteBranch(parseResult.get(i*4), parseResult.get(i*4 + 1), parseResult.get(i*4 + 2), parseResult.get(i*4 + 3));
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299 rv.add(rb);
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300 }
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301 return rv;
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diff changeset
302 } catch (MalformedURLException ex) {
215
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303 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("branches").setServerInfo(getLocation());
178
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304 } catch (IOException ex) {
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305 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("branches").setServerInfo(getLocation());
178
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306 }
171
2c3e96674e2a Towards outgoing changes - initial detection logic, get connected with remote repo stub
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diff changeset
307 }
170
71ddbf8603e8 Initial clone: populate given directory from a bundle. Everything but remote server access is there, albeit prototype code style
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diff changeset
308
186
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diff changeset
309 /*
202
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diff changeset
310 * XXX need to describe behavior when roots arg is empty; our RepositoryComparator code currently returns empty lists when
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311 * no common elements found, which in turn means we need to query changes starting with NULL nodeid.
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312 *
186
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diff changeset
313 * WireProtocol wiki: roots = a list of the latest nodes on every service side changeset branch that both the client and server know about.
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314 *
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315 * Perhaps, shall be named 'changegroup'
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316
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317 * Changegroup:
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318 * http://mercurial.selenic.com/wiki/Merge
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319 * http://mercurial.selenic.com/wiki/WireProtocol
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320 *
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321 * according to latter, bundleformat data is sent through zlib
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322 * (there's no header like HG10?? with the server output, though,
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323 * as one may expect according to http://mercurial.selenic.com/wiki/BundleFormat)
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324 */
215
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325 public HgBundle getChanges(List<Nodeid> roots) throws HgRemoteConnectionException {
202
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326 List<Nodeid> _roots = roots.isEmpty() ? Collections.singletonList(Nodeid.NULL) : roots;
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327 StringBuilder sb = new StringBuilder(20 + _roots.size() * 41);
179
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328 sb.append("roots=");
202
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329 for (Nodeid n : _roots) {
179
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330 sb.append(n.toString());
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331 sb.append('+');
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332 }
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333 if (sb.charAt(sb.length() - 1) == '+') {
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334 // strip last space
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335 sb.setLength(sb.length() - 1);
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336 }
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337 try {
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338 URL u = new URL(url, url.getPath() + "?cmd=changegroup&" + sb.toString());
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339 HttpURLConnection c = setupConnection(u.openConnection());
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340 c.connect();
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341 if (debug) {
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342 dumpResponseHeader(u, c);
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343 }
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344 File tf = writeBundle(c.getInputStream(), false, "HG10GZ" /*didn't see any other that zip*/);
190
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345 if (debug) {
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346 System.out.printf("Wrote bundle %s for roots %s\n", tf, sb);
190
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347 }
186
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348 return getLookupHelper().loadBundle(tf);
215
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349 } catch (MalformedURLException ex) { // XXX in fact, this exception might be better to be re-thrown as RuntimeEx,
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350 // as there's little user can do about this issue (URLs are constructed by our code)
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351 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
179
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352 } catch (IOException ex) {
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353 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
179
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354 }
170
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355 }
186
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356
203
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357 @Override
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358 public String toString() {
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359 return getClass().getSimpleName() + '[' + getLocation() + ']';
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360 }
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361
186
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362 private HgLookup getLookupHelper() {
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363 if (lookupHelper == null) {
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364 lookupHelper = new HgLookup();
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365 }
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366 return lookupHelper;
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367 }
176
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368
177
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369 private HttpURLConnection setupConnection(URLConnection urlConnection) {
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370 urlConnection.setRequestProperty("User-Agent", "hg4j/0.5.0");
176
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371 urlConnection.addRequestProperty("Accept", "application/mercurial-0.1");
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372 if (authInfo != null) {
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373 urlConnection.addRequestProperty("Authorization", "Basic " + authInfo);
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374 }
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375 if (sslContext != null) {
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376 ((HttpsURLConnection) urlConnection).setSSLSocketFactory(sslContext.getSocketFactory());
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377 }
177
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378 return (HttpURLConnection) urlConnection;
176
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379 }
171
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380
178
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381 private void dumpResponseHeader(URL u, HttpURLConnection c) {
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382 System.out.printf("Query (%d bytes):%s\n", u.getQuery().length(), u.getQuery());
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383 System.out.println("Response headers:");
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384 final Map<String, List<String>> headerFields = c.getHeaderFields();
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385 for (String s : headerFields.keySet()) {
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386 System.out.printf("%s: %s\n", s, c.getHeaderField(s));
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387 }
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388 }
179
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389
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390 private static File writeBundle(InputStream is, boolean decompress, String header) throws IOException {
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391 InputStream zipStream = decompress ? new InflaterInputStream(is) : is;
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392 File tf = File.createTempFile("hg-bundle-", null);
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393 FileOutputStream fos = new FileOutputStream(tf);
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394 fos.write(header.getBytes());
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395 int r;
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396 byte[] buf = new byte[8*1024];
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397 while ((r = zipStream.read(buf)) != -1) {
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398 fos.write(buf, 0, r);
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399 }
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400 fos.close();
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401 zipStream.close();
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402 return tf;
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403 }
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404
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405
176
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406 public static final class Range {
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407 /**
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408 * Root of the range, earlier revision
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409 */
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410 public final Nodeid start;
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411 /**
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412 * Head of the range, later revision.
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413 */
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414 public final Nodeid end;
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415
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416 /**
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417 * @param from - root/base revision
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418 * @param to - head/tip revision
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419 */
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420 public Range(Nodeid from, Nodeid to) {
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421 start = from;
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422 end = to;
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423 }
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424 }
184
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425
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426 public static final class RemoteBranch {
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427 public final Nodeid head, root, p1, p2;
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428
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429 public RemoteBranch(Nodeid h, Nodeid r, Nodeid parent1, Nodeid parent2) {
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430 head = h;
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431 root = r;
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432 p1 = parent1;
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433 p2 = parent2;
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434 }
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435
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parents: 170
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436 @Override
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437 public boolean equals(Object obj) {
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438 if (this == obj) {
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439 return true;
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parents: 170
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440 }
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parents: 170
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441 if (false == obj instanceof RemoteBranch) {
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442 return false;
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443 }
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444 RemoteBranch o = (RemoteBranch) obj;
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445 return head.equals(o.head) && root.equals(o.root) && (p1 == null && o.p1 == null || p1.equals(o.p1)) && (p2 == null && o.p2 == null || p2.equals(o.p2));
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parents: 170
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446 }
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447 }
170
71ddbf8603e8 Initial clone: populate given directory from a bundle. Everything but remote server access is there, albeit prototype code style
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448 }