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annotate src/org/tmatesoft/hg/repo/HgRemoteRepository.java @ 428:ead6c67f3319

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Actual 'hello' check of the remote server/connection
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 29 Mar 2012 18:05:05 +0200
parents 48f993aa2f41
children 2a08466838d3
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 java.io.BufferedReader;
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20 import java.io.File;
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21 import java.io.FileOutputStream;
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22 import java.io.IOException;
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23 import java.io.InputStream;
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24 import java.io.InputStreamReader;
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25 import java.io.OutputStream;
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26 import java.io.StreamTokenizer;
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27 import java.net.HttpURLConnection;
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28 import java.net.MalformedURLException;
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29 import java.net.URL;
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30 import java.net.URLConnection;
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31 import java.security.cert.CertificateException;
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32 import java.security.cert.X509Certificate;
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33 import java.util.ArrayList;
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34 import java.util.Arrays;
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35 import java.util.Collection;
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36 import java.util.Collections;
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37 import java.util.HashSet;
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38 import java.util.Iterator;
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39 import java.util.LinkedHashMap;
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40 import java.util.LinkedList;
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41 import java.util.List;
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42 import java.util.Map;
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43 import java.util.Set;
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44 import java.util.prefs.BackingStoreException;
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45 import java.util.prefs.Preferences;
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46 import java.util.zip.InflaterInputStream;
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47
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48 import javax.net.ssl.HttpsURLConnection;
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49 import javax.net.ssl.SSLContext;
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50 import javax.net.ssl.TrustManager;
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51 import javax.net.ssl.X509TrustManager;
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53 import org.tmatesoft.hg.core.HgBadArgumentException;
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54 import org.tmatesoft.hg.core.HgRemoteConnectionException;
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55 import org.tmatesoft.hg.core.HgRepositoryNotFoundException;
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56 import org.tmatesoft.hg.core.Nodeid;
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57 import org.tmatesoft.hg.core.SessionContext;
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59 /**
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60 * WORK IN PROGRESS, DO NOT USE
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61 *
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62 * @see http://mercurial.selenic.com/wiki/WireProtocol
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63 *
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64 * @author Artem Tikhomirov
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65 * @author TMate Software Ltd.
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66 */
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67 public class HgRemoteRepository {
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68
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69 private final URL url;
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70 private final SSLContext sslContext;
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71 private final String authInfo;
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72 private final boolean debug;
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73 private HgLookup lookupHelper;
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74 private final SessionContext sessionContext;
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75 private Set<String> remoteCapabilities;
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76
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77 HgRemoteRepository(SessionContext ctx, URL url) throws HgBadArgumentException {
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78 if (url == null || ctx == null) {
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79 throw new IllegalArgumentException();
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80 }
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81 this.url = url;
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82 sessionContext = ctx;
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83 Object debugProp = ctx.getProperty("hg4j.remote.debug", false);
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84 debug = debugProp instanceof Boolean ? ((Boolean) debugProp).booleanValue() : Boolean.parseBoolean(String.valueOf(debugProp));
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85 if ("https".equals(url.getProtocol())) {
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86 try {
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87 sslContext = SSLContext.getInstance("SSL");
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88 class TrustEveryone implements X509TrustManager {
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89 public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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90 if (debug) {
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91 System.out.println("checkClientTrusted:" + authType);
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92 }
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93 }
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94 public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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95 if (debug) {
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96 System.out.println("checkServerTrusted:" + authType);
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97 }
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98 }
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99 public X509Certificate[] getAcceptedIssuers() {
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100 return new X509Certificate[0];
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101 }
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102 };
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103 sslContext.init(null, new TrustManager[] { new TrustEveryone() }, null);
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104 } catch (Exception ex) {
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105 throw new HgBadArgumentException("Can't initialize secure connection", ex);
176
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106 }
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107 } else {
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108 sslContext = null;
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109 }
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110 if (url.getUserInfo() != null) {
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111 String ai = null;
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112 try {
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113 // Hack to get Base64-encoded credentials
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114 Preferences tempNode = Preferences.userRoot().node("xxx");
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115 tempNode.putByteArray("xxx", url.getUserInfo().getBytes());
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116 ai = tempNode.get("xxx", null);
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117 tempNode.removeNode();
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118 } catch (BackingStoreException ex) {
357
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119 sessionContext.getLog().info(getClass(), ex, null);
176
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120 // IGNORE
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121 }
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122 authInfo = ai;
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123 } else {
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124 authInfo = null;
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125 }
171
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126 }
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127
215
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128 public boolean isInvalid() throws HgRemoteConnectionException {
428
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129 if (remoteCapabilities == null) {
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130 remoteCapabilities = new HashSet<String>();
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131 // say hello to server, check response
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132 try {
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133 URL u = new URL(url, url.getPath() + "?cmd=hello");
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134 HttpURLConnection c = setupConnection(u.openConnection());
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135 c.connect();
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136 if (debug) {
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137 dumpResponseHeader(u, c);
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138 }
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139 BufferedReader r = new BufferedReader(new InputStreamReader(c.getInputStream(), "US-ASCII"));
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140 String line = r.readLine();
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141 c.disconnect();
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142 final String capsPrefix = "capabilities:";
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143 if (line == null || !line.startsWith(capsPrefix)) {
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144 // for whatever reason, some servers do not respond to hello command (e.g. svnkit)
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145 // but respond to 'capabilities' instead. Try it.
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146 // TODO [post-1.0] tests needed
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147 u = new URL(url, url.getPath() + "?cmd=capabilities");
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148 c = setupConnection(u.openConnection());
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149 c.connect();
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150 if (debug) {
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151 dumpResponseHeader(u, c);
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152 }
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153 r = new BufferedReader(new InputStreamReader(c.getInputStream(), "US-ASCII"));
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154 line = r.readLine();
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155 c.disconnect();
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156 if (line == null || line.trim().isEmpty()) {
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157 return true;
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158 }
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159 } else {
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160 line = line.substring(capsPrefix.length()).trim();
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161 }
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162 String[] caps = line.split("\\s");
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163 remoteCapabilities.addAll(Arrays.asList(caps));
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164 c.disconnect();
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165 } catch (MalformedURLException ex) {
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166 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("hello").setServerInfo(getLocation());
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167 } catch (IOException ex) {
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diff changeset
168 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("hello").setServerInfo(getLocation());
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169 }
181
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170 }
428
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diff changeset
171 return remoteCapabilities.isEmpty();
181
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172 }
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173
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diff changeset
174 /**
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175 * @return human-readable address of the server, without user credentials or any other security information
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176 */
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177 public String getLocation() {
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178 if (url.getUserInfo() == null) {
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179 return url.toExternalForm();
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180 }
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diff changeset
181 if (url.getPort() != -1) {
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182 return String.format("%s://%s:%d%s", url.getProtocol(), url.getHost(), url.getPort(), url.getPath());
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183 } else {
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diff changeset
184 return String.format("%s://%s%s", url.getProtocol(), url.getHost(), url.getPath());
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185 }
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186 }
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187
215
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188 public List<Nodeid> heads() throws HgRemoteConnectionException {
178
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diff changeset
189 try {
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diff changeset
190 URL u = new URL(url, url.getPath() + "?cmd=heads");
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191 HttpURLConnection c = setupConnection(u.openConnection());
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diff changeset
192 c.connect();
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diff changeset
193 if (debug) {
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diff changeset
194 dumpResponseHeader(u, c);
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diff changeset
195 }
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diff changeset
196 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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diff changeset
197 StreamTokenizer st = new StreamTokenizer(is);
428
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diff changeset
198 st.ordinaryChars('0', '9'); // wordChars performs |, hence need to 0 first
178
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199 st.wordChars('0', '9');
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200 st.eolIsSignificant(false);
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201 LinkedList<Nodeid> parseResult = new LinkedList<Nodeid>();
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diff changeset
202 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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diff changeset
203 parseResult.add(Nodeid.fromAscii(st.sval));
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diff changeset
204 }
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diff changeset
205 return parseResult;
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diff changeset
206 } catch (MalformedURLException ex) {
215
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diff changeset
207 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("heads").setServerInfo(getLocation());
178
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diff changeset
208 } catch (IOException ex) {
215
41a778e3fd31 Issue 5: Facilities for progress and cancellation. More specific exceptions. Exceptions from callbacks as RuntimeException
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diff changeset
209 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("heads").setServerInfo(getLocation());
178
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210 }
171
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diff changeset
211 }
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diff changeset
212
215
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diff changeset
213 public List<Nodeid> between(Nodeid tip, Nodeid base) throws HgRemoteConnectionException {
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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diff changeset
214 Range r = new Range(base, tip);
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215 // XXX shall handle errors like no range key in the returned map, not sure how.
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216 return between(Collections.singletonList(r)).get(r);
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217 }
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218
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219 /**
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220 * @param ranges
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221 * @return map, where keys are input instances, values are corresponding server reply
215
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222 * @throws HgRemoteConnectionException
177
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223 */
215
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224 public Map<Range, List<Nodeid>> between(Collection<Range> ranges) throws HgRemoteConnectionException {
177
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225 if (ranges.isEmpty()) {
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226 return Collections.emptyMap();
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227 }
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228 // if fact, shall do other way round, this method shall send
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229 LinkedHashMap<Range, List<Nodeid>> rv = new LinkedHashMap<HgRemoteRepository.Range, List<Nodeid>>(ranges.size() * 4 / 3);
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230 StringBuilder sb = new StringBuilder(20 + ranges.size() * 82);
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231 sb.append("pairs=");
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232 for (Range r : ranges) {
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233 sb.append(r.end.toString());
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234 sb.append('-');
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235 sb.append(r.start.toString());
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236 sb.append('+');
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237 }
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238 if (sb.charAt(sb.length() - 1) == '+') {
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239 // strip last space
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240 sb.setLength(sb.length() - 1);
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241 }
176
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242 try {
177
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243 boolean usePOST = ranges.size() > 3;
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244 URL u = new URL(url, url.getPath() + "?cmd=between" + (usePOST ? "" : '&' + sb.toString()));
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245 HttpURLConnection c = setupConnection(u.openConnection());
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246 if (usePOST) {
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247 c.setRequestMethod("POST");
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248 c.setRequestProperty("Content-Length", String.valueOf(sb.length()/*nodeids are ASCII, bytes == characters */));
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249 c.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
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250 c.setDoOutput(true);
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251 c.connect();
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252 OutputStream os = c.getOutputStream();
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253 os.write(sb.toString().getBytes());
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254 os.flush();
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255 os.close();
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256 } else {
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257 c.connect();
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258 }
178
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259 if (debug) {
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260 System.out.printf("%d ranges, method:%s \n", ranges.size(), c.getRequestMethod());
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261 dumpResponseHeader(u, c);
176
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262 }
177
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263 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
176
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264 StreamTokenizer st = new StreamTokenizer(is);
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265 st.ordinaryChars('0', '9');
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266 st.wordChars('0', '9');
177
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267 st.eolIsSignificant(true);
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268 Iterator<Range> rangeItr = ranges.iterator();
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269 LinkedList<Nodeid> currRangeList = null;
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270 Range currRange = null;
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271 boolean possiblyEmptyNextLine = true;
176
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272 while (st.nextToken() != StreamTokenizer.TT_EOF) {
177
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273 if (st.ttype == StreamTokenizer.TT_EOL) {
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274 if (possiblyEmptyNextLine) {
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275 // newline follows newline;
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276 assert currRange == null;
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277 assert currRangeList == null;
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278 if (!rangeItr.hasNext()) {
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279 throw new HgInvalidStateException("Internal error"); // TODO revisit-1.1
177
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280 }
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281 rv.put(rangeItr.next(), Collections.<Nodeid>emptyList());
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282 } else {
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283 if (currRange == null || currRangeList == null) {
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284 throw new HgInvalidStateException("Internal error"); // TODO revisit-1.1
177
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285 }
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286 // indicate next range value is needed
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287 currRange = null;
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288 currRangeList = null;
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289 possiblyEmptyNextLine = true;
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290 }
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291 } else {
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292 possiblyEmptyNextLine = false;
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diff changeset
293 if (currRange == null) {
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294 if (!rangeItr.hasNext()) {
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295 throw new HgInvalidStateException("Internal error"); // TODO revisit-1.1
177
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296 }
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297 currRange = rangeItr.next();
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298 currRangeList = new LinkedList<Nodeid>();
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299 rv.put(currRange, currRangeList);
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300 }
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301 Nodeid nid = Nodeid.fromAscii(st.sval);
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302 currRangeList.addLast(nid);
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diff changeset
303 }
176
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304 }
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305 is.close();
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306 return rv;
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diff changeset
307 } catch (MalformedURLException ex) {
215
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diff changeset
308 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("between").setServerInfo(getLocation());
176
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309 } catch (IOException ex) {
215
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diff changeset
310 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("between").setServerInfo(getLocation());
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311 }
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312 }
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313
215
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diff changeset
314 public List<RemoteBranch> branches(List<Nodeid> nodes) throws HgRemoteConnectionException {
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315 StringBuilder sb = new StringBuilder(20 + nodes.size() * 41);
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316 sb.append("nodes=");
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317 for (Nodeid n : nodes) {
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318 sb.append(n.toString());
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319 sb.append('+');
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320 }
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diff changeset
321 if (sb.charAt(sb.length() - 1) == '+') {
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322 // strip last space
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323 sb.setLength(sb.length() - 1);
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324 }
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325 try {
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326 URL u = new URL(url, url.getPath() + "?cmd=branches&" + sb.toString());
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327 HttpURLConnection c = setupConnection(u.openConnection());
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328 c.connect();
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329 if (debug) {
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330 dumpResponseHeader(u, c);
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331 }
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332 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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333 StreamTokenizer st = new StreamTokenizer(is);
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334 st.ordinaryChars('0', '9');
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335 st.wordChars('0', '9');
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336 st.eolIsSignificant(false);
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337 ArrayList<Nodeid> parseResult = new ArrayList<Nodeid>(nodes.size() * 4);
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338 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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339 parseResult.add(Nodeid.fromAscii(st.sval));
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340 }
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341 if (parseResult.size() != nodes.size() * 4) {
215
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342 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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343 }
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344 ArrayList<RemoteBranch> rv = new ArrayList<RemoteBranch>(nodes.size());
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345 for (int i = 0; i < nodes.size(); i++) {
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346 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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347 rv.add(rb);
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348 }
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349 return rv;
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350 } catch (MalformedURLException ex) {
215
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351 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("branches").setServerInfo(getLocation());
178
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352 } catch (IOException ex) {
215
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353 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("branches").setServerInfo(getLocation());
178
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354 }
171
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355 }
170
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356
186
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357 /*
202
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358 * XXX need to describe behavior when roots arg is empty; our RepositoryComparator code currently returns empty lists when
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359 * no common elements found, which in turn means we need to query changes starting with NULL nodeid.
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360 *
186
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361 * 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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362 *
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363 * Perhaps, shall be named 'changegroup'
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364
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365 * Changegroup:
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366 * http://mercurial.selenic.com/wiki/Merge
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367 * http://mercurial.selenic.com/wiki/WireProtocol
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368 *
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369 * according to latter, bundleformat data is sent through zlib
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370 * (there's no header like HG10?? with the server output, though,
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371 * as one may expect according to http://mercurial.selenic.com/wiki/BundleFormat)
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372 */
425
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373 public HgBundle getChanges(List<Nodeid> roots) throws HgRemoteConnectionException, HgRuntimeException {
202
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374 List<Nodeid> _roots = roots.isEmpty() ? Collections.singletonList(Nodeid.NULL) : roots;
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375 StringBuilder sb = new StringBuilder(20 + _roots.size() * 41);
179
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376 sb.append("roots=");
202
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377 for (Nodeid n : _roots) {
179
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378 sb.append(n.toString());
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379 sb.append('+');
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380 }
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diff changeset
381 if (sb.charAt(sb.length() - 1) == '+') {
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382 // strip last space
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383 sb.setLength(sb.length() - 1);
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384 }
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385 try {
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386 URL u = new URL(url, url.getPath() + "?cmd=changegroup&" + sb.toString());
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387 HttpURLConnection c = setupConnection(u.openConnection());
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388 c.connect();
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diff changeset
389 if (debug) {
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390 dumpResponseHeader(u, c);
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391 }
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392 File tf = writeBundle(c.getInputStream(), false, "HG10GZ" /*didn't see any other that zip*/);
190
9b99d27aeddc More debug printouts
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diff changeset
393 if (debug) {
210
6a2481866491 Wrong parent assignment when building branch chain
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diff changeset
394 System.out.printf("Wrote bundle %s for roots %s\n", tf, sb);
190
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diff changeset
395 }
186
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diff changeset
396 return getLookupHelper().loadBundle(tf);
215
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397 } catch (MalformedURLException ex) { // XXX in fact, this exception might be better to be re-thrown as RuntimeEx,
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398 // as there's little user can do about this issue (URLs are constructed by our code)
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399 throw new HgRemoteConnectionException("Bad URL", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
179
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diff changeset
400 } catch (IOException ex) {
215
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401 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
425
48f993aa2f41 FIXMEs: exceptions, javadoc
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diff changeset
402 } catch (HgRepositoryNotFoundException ex) {
48f993aa2f41 FIXMEs: exceptions, javadoc
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diff changeset
403 throw new HgRemoteConnectionException("Communication failure", ex).setRemoteCommand("changegroup").setServerInfo(getLocation());
179
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diff changeset
404 }
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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405 }
186
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406
203
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diff changeset
407 @Override
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diff changeset
408 public String toString() {
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diff changeset
409 return getClass().getSimpleName() + '[' + getLocation() + ']';
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diff changeset
410 }
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diff changeset
411
186
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412 private HgLookup getLookupHelper() {
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diff changeset
413 if (lookupHelper == null) {
295
981f9f50bb6c Issue 11: Error log facility. SessionContext to share common facilities
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diff changeset
414 lookupHelper = new HgLookup(sessionContext);
186
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diff changeset
415 }
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diff changeset
416 return lookupHelper;
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diff changeset
417 }
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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diff changeset
418
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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diff changeset
419 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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diff changeset
420 urlConnection.setRequestProperty("User-Agent", "hg4j/0.5.0");
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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diff changeset
421 urlConnection.addRequestProperty("Accept", "application/mercurial-0.1");
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diff changeset
422 if (authInfo != null) {
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diff changeset
423 urlConnection.addRequestProperty("Authorization", "Basic " + authInfo);
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diff changeset
424 }
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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diff changeset
425 if (sslContext != null) {
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diff changeset
426 ((HttpsURLConnection) urlConnection).setSSLSocketFactory(sslContext.getSocketFactory());
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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diff changeset
427 }
177
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diff changeset
428 return (HttpURLConnection) urlConnection;
176
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diff changeset
429 }
171
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430
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431 private void dumpResponseHeader(URL u, HttpURLConnection c) {
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432 System.out.printf("Query (%d bytes):%s\n", u.getQuery().length(), u.getQuery());
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433 System.out.println("Response headers:");
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434 final Map<String, List<String>> headerFields = c.getHeaderFields();
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435 for (String s : headerFields.keySet()) {
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436 System.out.printf("%s: %s\n", s, c.getHeaderField(s));
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437 }
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438 }
179
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439
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440 private static File writeBundle(InputStream is, boolean decompress, String header) throws IOException {
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441 InputStream zipStream = decompress ? new InflaterInputStream(is) : is;
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442 File tf = File.createTempFile("hg-bundle-", null);
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443 FileOutputStream fos = new FileOutputStream(tf);
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444 fos.write(header.getBytes());
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445 int r;
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446 byte[] buf = new byte[8*1024];
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447 while ((r = zipStream.read(buf)) != -1) {
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448 fos.write(buf, 0, r);
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449 }
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450 fos.close();
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451 zipStream.close();
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452 return tf;
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453 }
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454
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455
176
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456 public static final class Range {
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457 /**
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458 * Root of the range, earlier revision
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459 */
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460 public final Nodeid start;
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461 /**
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462 * Head of the range, later revision.
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463 */
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464 public final Nodeid end;
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465
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466 /**
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467 * @param from - root/base revision
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468 * @param to - head/tip revision
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469 */
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470 public Range(Nodeid from, Nodeid to) {
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471 start = from;
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472 end = to;
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473 }
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474 }
184
ec1820f64d2b Complete incoming cmdline client, with both lite (revisions) and complete (full changeset) information dump
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475
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476 public static final class RemoteBranch {
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477 public final Nodeid head, root, p1, p2;
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478
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479 public RemoteBranch(Nodeid h, Nodeid r, Nodeid parent1, Nodeid parent2) {
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480 head = h;
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481 root = r;
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482 p1 = parent1;
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483 p2 = parent2;
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484 }
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485
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486 @Override
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487 public boolean equals(Object obj) {
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488 if (this == obj) {
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489 return true;
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490 }
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491 if (false == obj instanceof RemoteBranch) {
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492 return false;
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493 }
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494 RemoteBranch o = (RemoteBranch) obj;
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9fb50c04f03c Use Nodeid.isNull check instead of NULL.equals
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495 // 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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496 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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497 }
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498 }
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
499 }