Mercurial > hg4j

annotate src/org/tmatesoft/hg/repo/HgRemoteRepository.java @ 608:e1b29756f901

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Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 07 May 2013 21:27:51 +0200
parents b3c16d1aede0
children 14dac192aa26
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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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18
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
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20
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21 import java.io.BufferedReader;
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22 import java.io.File;
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23 import java.io.FileOutputStream;
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24 import java.io.IOException;
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25 import java.io.InputStream;
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26 import java.io.InputStreamReader;
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27 import java.io.OutputStream;
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28 import java.io.StreamTokenizer;
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29 import java.net.HttpURLConnection;
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30 import java.net.MalformedURLException;
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31 import java.net.URL;
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32 import java.net.URLConnection;
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33 import java.security.cert.CertificateException;
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34 import java.security.cert.X509Certificate;
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35 import java.util.ArrayList;
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36 import java.util.Arrays;
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37 import java.util.Collection;
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38 import java.util.Collections;
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39 import java.util.HashSet;
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40 import java.util.Iterator;
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41 import java.util.LinkedHashMap;
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42 import java.util.LinkedList;
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43 import java.util.List;
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44 import java.util.Map;
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45 import java.util.Set;
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46 import java.util.prefs.BackingStoreException;
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47 import java.util.prefs.Preferences;
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48 import java.util.zip.InflaterInputStream;
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50 import javax.net.ssl.HttpsURLConnection;
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51 import javax.net.ssl.SSLContext;
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52 import javax.net.ssl.TrustManager;
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53 import javax.net.ssl.X509TrustManager;
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54
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55 import org.tmatesoft.hg.core.HgBadArgumentException;
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56 import org.tmatesoft.hg.core.HgRemoteConnectionException;
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57 import org.tmatesoft.hg.core.HgRepositoryNotFoundException;
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58 import org.tmatesoft.hg.core.Nodeid;
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59 import org.tmatesoft.hg.core.SessionContext;
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60 import org.tmatesoft.hg.internal.PropertyMarshal;
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62 /**
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63 * WORK IN PROGRESS, DO NOT USE
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64 *
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65 * @see http://mercurial.selenic.com/wiki/WireProtocol
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66 *
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67 * @author Artem Tikhomirov
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68 * @author TMate Software Ltd.
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69 */
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70 public class HgRemoteRepository implements SessionContext.Source {
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71
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72 private final URL url;
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73 private final SSLContext sslContext;
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74 private final String authInfo;
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75 private final boolean debug;
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76 private HgLookup lookupHelper;
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77 private final SessionContext sessionContext;
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78 private Set<String> remoteCapabilities;
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79
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80 HgRemoteRepository(SessionContext ctx, URL url) throws HgBadArgumentException {
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81 if (url == null || ctx == null) {
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82 throw new IllegalArgumentException();
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83 }
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84 this.url = url;
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85 sessionContext = ctx;
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86 debug = new PropertyMarshal(ctx).getBoolean("hg4j.remote.debug", false);
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87 if ("https".equals(url.getProtocol())) {
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88 try {
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89 sslContext = SSLContext.getInstance("SSL");
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90 class TrustEveryone implements X509TrustManager {
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91 public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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92 if (debug) {
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93 System.out.println("checkClientTrusted:" + authType);
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94 }
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95 }
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96 public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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97 if (debug) {
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98 System.out.println("checkServerTrusted:" + authType);
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99 }
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100 }
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101 public X509Certificate[] getAcceptedIssuers() {
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102 return new X509Certificate[0];
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103 }
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104 };
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105 sslContext.init(null, new TrustManager[] { new TrustEveryone() }, null);
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106 } catch (Exception ex) {
181
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107 throw new HgBadArgumentException("Can't initialize secure connection", ex);
176
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108 }
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109 } else {
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110 sslContext = null;
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111 }
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112 if (url.getUserInfo() != null) {
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113 String ai = null;
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114 try {
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115 // Hack to get Base64-encoded credentials
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116 Preferences tempNode = Preferences.userRoot().node("xxx");
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117 tempNode.putByteArray("xxx", url.getUserInfo().getBytes());
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118 ai = tempNode.get("xxx", null);
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119 tempNode.removeNode();
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120 } catch (BackingStoreException ex) {
456
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121 sessionContext.getLog().dump(getClass(), Info, ex, null);
176
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122 // IGNORE
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123 }
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124 authInfo = ai;
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125 } else {
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126 authInfo = null;
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127 }
171
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128 }
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129
215
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130 public boolean isInvalid() throws HgRemoteConnectionException {
428
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131 if (remoteCapabilities == null) {
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132 remoteCapabilities = new HashSet<String>();
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133 // say hello to server, check response
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134 try {
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135 URL u = new URL(url, url.getPath() + "?cmd=hello");
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136 HttpURLConnection c = setupConnection(u.openConnection());
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137 c.connect();
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138 if (debug) {
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139 dumpResponseHeader(u, c);
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140 }
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141 BufferedReader r = new BufferedReader(new InputStreamReader(c.getInputStream(), "US-ASCII"));
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142 String line = r.readLine();
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143 c.disconnect();
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144 final String capsPrefix = "capabilities:";
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145 if (line == null || !line.startsWith(capsPrefix)) {
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146 // for whatever reason, some servers do not respond to hello command (e.g. svnkit)
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147 // but respond to 'capabilities' instead. Try it.
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148 // TODO [post-1.0] tests needed
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149 u = new URL(url, url.getPath() + "?cmd=capabilities");
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150 c = setupConnection(u.openConnection());
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151 c.connect();
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152 if (debug) {
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153 dumpResponseHeader(u, c);
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154 }
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155 r = new BufferedReader(new InputStreamReader(c.getInputStream(), "US-ASCII"));
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156 line = r.readLine();
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157 c.disconnect();
441
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158 if (line == null || line.trim().length() == 0) {
428
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159 return true;
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160 }
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161 } else {
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diff changeset
162 line = line.substring(capsPrefix.length()).trim();
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163 }
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164 String[] caps = line.split("\\s");
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165 remoteCapabilities.addAll(Arrays.asList(caps));
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166 c.disconnect();
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diff changeset
167 } catch (MalformedURLException ex) {
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diff changeset
168 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("hello").setServerInfo(getLocation());
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diff changeset
169 } catch (IOException ex) {
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diff changeset
170 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("hello").setServerInfo(getLocation());
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171 }
181
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172 }
428
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diff changeset
173 return remoteCapabilities.isEmpty();
181
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174 }
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diff changeset
175
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diff changeset
176 /**
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177 * @return human-readable address of the server, without user credentials or any other security information
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diff changeset
178 */
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diff changeset
179 public String getLocation() {
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diff changeset
180 if (url.getUserInfo() == null) {
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diff changeset
181 return url.toExternalForm();
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182 }
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diff changeset
183 if (url.getPort() != -1) {
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diff changeset
184 return String.format("%s://%s:%d%s", url.getProtocol(), url.getHost(), url.getPort(), url.getPath());
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185 } else {
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diff changeset
186 return String.format("%s://%s%s", url.getProtocol(), url.getHost(), url.getPath());
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187 }
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188 }
490
b3c16d1aede0 Refactoring: move HgRepository's implementation aspects to Internals (which is now its imlementation counterpart and primary repository class to be used by other parts of the library)
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parents: 456
diff changeset
189
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diff changeset
190 public SessionContext getSessionContext() {
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diff changeset
191 return sessionContext;
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192 }
181
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diff changeset
193
215
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diff changeset
194 public List<Nodeid> heads() throws HgRemoteConnectionException {
178
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diff changeset
195 try {
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diff changeset
196 URL u = new URL(url, url.getPath() + "?cmd=heads");
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diff changeset
197 HttpURLConnection c = setupConnection(u.openConnection());
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diff changeset
198 c.connect();
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diff changeset
199 if (debug) {
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diff changeset
200 dumpResponseHeader(u, c);
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diff changeset
201 }
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diff changeset
202 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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diff changeset
203 StreamTokenizer st = new StreamTokenizer(is);
428
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diff changeset
204 st.ordinaryChars('0', '9'); // wordChars performs |, hence need to 0 first
178
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diff changeset
205 st.wordChars('0', '9');
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diff changeset
206 st.eolIsSignificant(false);
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diff changeset
207 LinkedList<Nodeid> parseResult = new LinkedList<Nodeid>();
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diff changeset
208 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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diff changeset
209 parseResult.add(Nodeid.fromAscii(st.sval));
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diff changeset
210 }
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diff changeset
211 return parseResult;
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diff changeset
212 } catch (MalformedURLException ex) {
215
41a778e3fd31 Issue 5: Facilities for progress and cancellation. More specific exceptions. Exceptions from callbacks as RuntimeException
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parents: 210
diff changeset
213 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("heads").setServerInfo(getLocation());
178
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diff changeset
214 } catch (IOException ex) {
215
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215 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("heads").setServerInfo(getLocation());
178
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216 }
171
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217 }
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218
215
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219 public List<Nodeid> between(Nodeid tip, Nodeid base) throws HgRemoteConnectionException {
177
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220 Range r = new Range(base, tip);
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221 // XXX shall handle errors like no range key in the returned map, not sure how.
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222 return between(Collections.singletonList(r)).get(r);
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223 }
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224
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225 /**
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226 * @param ranges
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227 * @return map, where keys are input instances, values are corresponding server reply
215
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228 * @throws HgRemoteConnectionException
177
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229 */
215
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230 public Map<Range, List<Nodeid>> between(Collection<Range> ranges) throws HgRemoteConnectionException {
177
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231 if (ranges.isEmpty()) {
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232 return Collections.emptyMap();
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233 }
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234 // if fact, shall do other way round, this method shall send
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235 LinkedHashMap<Range, List<Nodeid>> rv = new LinkedHashMap<HgRemoteRepository.Range, List<Nodeid>>(ranges.size() * 4 / 3);
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236 StringBuilder sb = new StringBuilder(20 + ranges.size() * 82);
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237 sb.append("pairs=");
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238 for (Range r : ranges) {
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239 sb.append(r.end.toString());
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240 sb.append('-');
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241 sb.append(r.start.toString());
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242 sb.append('+');
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243 }
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244 if (sb.charAt(sb.length() - 1) == '+') {
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245 // strip last space
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246 sb.setLength(sb.length() - 1);
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247 }
176
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248 try {
177
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249 boolean usePOST = ranges.size() > 3;
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250 URL u = new URL(url, url.getPath() + "?cmd=between" + (usePOST ? "" : '&' + sb.toString()));
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251 HttpURLConnection c = setupConnection(u.openConnection());
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252 if (usePOST) {
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253 c.setRequestMethod("POST");
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254 c.setRequestProperty("Content-Length", String.valueOf(sb.length()/*nodeids are ASCII, bytes == characters */));
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255 c.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
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256 c.setDoOutput(true);
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257 c.connect();
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258 OutputStream os = c.getOutputStream();
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259 os.write(sb.toString().getBytes());
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260 os.flush();
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261 os.close();
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262 } else {
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263 c.connect();
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264 }
178
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265 if (debug) {
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266 System.out.printf("%d ranges, method:%s \n", ranges.size(), c.getRequestMethod());
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267 dumpResponseHeader(u, c);
176
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268 }
177
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269 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
176
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270 StreamTokenizer st = new StreamTokenizer(is);
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271 st.ordinaryChars('0', '9');
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272 st.wordChars('0', '9');
177
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273 st.eolIsSignificant(true);
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274 Iterator<Range> rangeItr = ranges.iterator();
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275 LinkedList<Nodeid> currRangeList = null;
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276 Range currRange = null;
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277 boolean possiblyEmptyNextLine = true;
176
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278 while (st.nextToken() != StreamTokenizer.TT_EOF) {
177
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279 if (st.ttype == StreamTokenizer.TT_EOL) {
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280 if (possiblyEmptyNextLine) {
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281 // newline follows newline;
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282 assert currRange == null;
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283 assert currRangeList == null;
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284 if (!rangeItr.hasNext()) {
423
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285 throw new HgInvalidStateException("Internal error"); // TODO revisit-1.1
177
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286 }
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diff changeset
287 rv.put(rangeItr.next(), Collections.<Nodeid>emptyList());
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288 } else {
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289 if (currRange == null || currRangeList == null) {
423
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290 throw new HgInvalidStateException("Internal error"); // TODO revisit-1.1
177
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291 }
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292 // indicate next range value is needed
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293 currRange = null;
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294 currRangeList = null;
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295 possiblyEmptyNextLine = true;
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296 }
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297 } else {
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298 possiblyEmptyNextLine = false;
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299 if (currRange == null) {
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diff changeset
300 if (!rangeItr.hasNext()) {
423
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301 throw new HgInvalidStateException("Internal error"); // TODO revisit-1.1
177
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302 }
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303 currRange = rangeItr.next();
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304 currRangeList = new LinkedList<Nodeid>();
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305 rv.put(currRange, currRangeList);
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306 }
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307 Nodeid nid = Nodeid.fromAscii(st.sval);
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308 currRangeList.addLast(nid);
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diff changeset
309 }
176
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310 }
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311 is.close();
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312 return rv;
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diff changeset
313 } catch (MalformedURLException ex) {
215
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diff changeset
314 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("between").setServerInfo(getLocation());
176
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315 } catch (IOException ex) {
215
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diff changeset
316 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("between").setServerInfo(getLocation());
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317 }
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318 }
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319
215
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diff changeset
320 public List<RemoteBranch> branches(List<Nodeid> nodes) throws HgRemoteConnectionException {
178
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321 StringBuilder sb = new StringBuilder(20 + nodes.size() * 41);
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322 sb.append("nodes=");
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323 for (Nodeid n : nodes) {
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324 sb.append(n.toString());
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325 sb.append('+');
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326 }
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327 if (sb.charAt(sb.length() - 1) == '+') {
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328 // strip last space
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329 sb.setLength(sb.length() - 1);
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330 }
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331 try {
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332 URL u = new URL(url, url.getPath() + "?cmd=branches&" + sb.toString());
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333 HttpURLConnection c = setupConnection(u.openConnection());
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334 c.connect();
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335 if (debug) {
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336 dumpResponseHeader(u, c);
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337 }
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338 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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339 StreamTokenizer st = new StreamTokenizer(is);
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340 st.ordinaryChars('0', '9');
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341 st.wordChars('0', '9');
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342 st.eolIsSignificant(false);
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343 ArrayList<Nodeid> parseResult = new ArrayList<Nodeid>(nodes.size() * 4);
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344 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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345 parseResult.add(Nodeid.fromAscii(st.sval));
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346 }
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347 if (parseResult.size() != nodes.size() * 4) {
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348 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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349 }
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350 ArrayList<RemoteBranch> rv = new ArrayList<RemoteBranch>(nodes.size());
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351 for (int i = 0; i < nodes.size(); i++) {
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352 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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353 rv.add(rb);
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354 }
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355 return rv;
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356 } catch (MalformedURLException ex) {
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357 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("branches").setServerInfo(getLocation());
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358 } catch (IOException ex) {
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359 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("branches").setServerInfo(getLocation());
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360 }
171
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361 }
170
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362
186
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363 /*
202
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364 * XXX need to describe behavior when roots arg is empty; our RepositoryComparator code currently returns empty lists when
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365 * no common elements found, which in turn means we need to query changes starting with NULL nodeid.
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366 *
186
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367 * 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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368 *
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369 * Perhaps, shall be named 'changegroup'
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370
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371 * Changegroup:
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372 * http://mercurial.selenic.com/wiki/Merge
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373 * http://mercurial.selenic.com/wiki/WireProtocol
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374 *
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375 * according to latter, bundleformat data is sent through zlib
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376 * (there's no header like HG10?? with the server output, though,
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377 * as one may expect according to http://mercurial.selenic.com/wiki/BundleFormat)
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378 */
425
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379 public HgBundle getChanges(List<Nodeid> roots) throws HgRemoteConnectionException, HgRuntimeException {
202
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380 List<Nodeid> _roots = roots.isEmpty() ? Collections.singletonList(Nodeid.NULL) : roots;
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381 StringBuilder sb = new StringBuilder(20 + _roots.size() * 41);
179
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382 sb.append("roots=");
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383 for (Nodeid n : _roots) {
179
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384 sb.append(n.toString());
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385 sb.append('+');
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386 }
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387 if (sb.charAt(sb.length() - 1) == '+') {
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388 // strip last space
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389 sb.setLength(sb.length() - 1);
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390 }
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391 try {
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392 URL u = new URL(url, url.getPath() + "?cmd=changegroup&" + sb.toString());
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393 HttpURLConnection c = setupConnection(u.openConnection());
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394 c.connect();
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diff changeset
395 if (debug) {
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396 dumpResponseHeader(u, c);
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397 }
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398 File tf = writeBundle(c.getInputStream(), false, "HG10GZ" /*didn't see any other that zip*/);
190
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diff changeset
399 if (debug) {
210
6a2481866491 Wrong parent assignment when building branch chain
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400 System.out.printf("Wrote bundle %s for roots %s\n", tf, sb);
190
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401 }
186
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402 return getLookupHelper().loadBundle(tf);
215
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403 } catch (MalformedURLException ex) { // XXX in fact, this exception might be better to be re-thrown as RuntimeEx,
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404 // as there's little user can do about this issue (URLs are constructed by our code)
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405 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
179
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406 } catch (IOException ex) {
215
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407 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
425
48f993aa2f41 FIXMEs: exceptions, javadoc
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408 } catch (HgRepositoryNotFoundException ex) {
48f993aa2f41 FIXMEs: exceptions, javadoc
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diff changeset
409 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
179
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410 }
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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411 }
186
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412
203
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413 @Override
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diff changeset
414 public String toString() {
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415 return getClass().getSimpleName() + '[' + getLocation() + ']';
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416 }
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diff changeset
417
186
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418 private HgLookup getLookupHelper() {
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diff changeset
419 if (lookupHelper == null) {
295
981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities
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420 lookupHelper = new HgLookup(sessionContext);
186
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421 }
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422 return lookupHelper;
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423 }
176
a8df7162ec75 Extracting complete branch using remote between call to detect incoming changes is done. Arguments reorderd in remote repo to better match Hg server ideology, not my mental convenience
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424
177
e10225daface Use POST for long between queries. Batch between queries (pass multiple pairs to a server) to minimize number thereof
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425 private HttpURLConnection setupConnection(URLConnection urlConnection) {
e10225daface Use POST for long between queries. Batch between queries (pass multiple pairs to a server) to minimize number thereof
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426 urlConnection.setRequestProperty("User-Agent", "hg4j/0.5.0");
176
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427 urlConnection.addRequestProperty("Accept", "application/mercurial-0.1");
a8df7162ec75 Extracting complete branch using remote between call to detect incoming changes is done. Arguments reorderd in remote repo to better match Hg server ideology, not my mental convenience
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428 if (authInfo != null) {
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429 urlConnection.addRequestProperty("Authorization", "Basic " + authInfo);
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430 }
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431 if (sslContext != null) {
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432 ((HttpsURLConnection) urlConnection).setSSLSocketFactory(sslContext.getSocketFactory());
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433 }
177
e10225daface Use POST for long between queries. Batch between queries (pass multiple pairs to a server) to minimize number thereof
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434 return (HttpURLConnection) urlConnection;
176
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435 }
171
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436
178
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437 private void dumpResponseHeader(URL u, HttpURLConnection c) {
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438 System.out.printf("Query (%d bytes):%s\n", u.getQuery().length(), u.getQuery());
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439 System.out.println("Response headers:");
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440 final Map<String, List<String>> headerFields = c.getHeaderFields();
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441 for (String s : headerFields.keySet()) {
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442 System.out.printf("%s: %s\n", s, c.getHeaderField(s));
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443 }
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444 }
179
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445
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446 private static File writeBundle(InputStream is, boolean decompress, String header) throws IOException {
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447 InputStream zipStream = decompress ? new InflaterInputStream(is) : is;
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448 File tf = File.createTempFile("hg-bundle-", null);
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449 FileOutputStream fos = new FileOutputStream(tf);
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450 fos.write(header.getBytes());
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451 int r;
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452 byte[] buf = new byte[8*1024];
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453 while ((r = zipStream.read(buf)) != -1) {
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454 fos.write(buf, 0, r);
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455 }
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456 fos.close();
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457 zipStream.close();
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458 return tf;
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459 }
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460
178
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461
176
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462 public static final class Range {
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463 /**
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464 * Root of the range, earlier revision
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465 */
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466 public final Nodeid start;
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467 /**
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468 * Head of the range, later revision.
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469 */
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470 public final Nodeid end;
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471
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472 /**
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473 * @param from - root/base revision
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474 * @param to - head/tip revision
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475 */
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476 public Range(Nodeid from, Nodeid to) {
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477 start = from;
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478 end = to;
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479 }
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480 }
184
ec1820f64d2b Complete incoming cmdline client, with both lite (revisions) and complete (full changeset) information dump
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481
171
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482 public static final class RemoteBranch {
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483 public final Nodeid head, root, p1, p2;
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484
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485 public RemoteBranch(Nodeid h, Nodeid r, Nodeid parent1, Nodeid parent2) {
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486 head = h;
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487 root = r;
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488 p1 = parent1;
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489 p2 = parent2;
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490 }
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491
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492 @Override
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493 public boolean equals(Object obj) {
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494 if (this == obj) {
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495 return true;
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diff changeset
496 }
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497 if (false == obj instanceof RemoteBranch) {
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498 return false;
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diff changeset
499 }
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500 RemoteBranch o = (RemoteBranch) obj;
274
9fb50c04f03c Use Nodeid.isNull check instead of NULL.equals
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501 // in fact, p1 and p2 are not supposed to be null, ever (at least for RemoteBranch created from server output)
171
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502 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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503 }
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diff changeset
504 }
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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parents:
diff changeset
505 }