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annotate src/org/tmatesoft/hg/repo/HgRemoteRepository.java @ 178:62665d8f0686

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Complete logic to discover all branches missing locally. Most of wire protocol in HgRemoteRepository
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 06 Apr 2011 01:34:16 +0200
parents e10225daface
children da426c2fe1ec
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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19 import java.io.File;
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20 import java.io.IOException;
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21 import java.io.InputStreamReader;
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22 import java.io.OutputStream;
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23 import java.io.StreamTokenizer;
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24 import java.net.HttpURLConnection;
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25 import java.net.MalformedURLException;
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26 import java.net.URL;
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27 import java.net.URLConnection;
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28 import java.security.cert.CertificateException;
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29 import java.security.cert.X509Certificate;
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30 import java.util.ArrayList;
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31 import java.util.Collection;
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32 import java.util.Collections;
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33 import java.util.Iterator;
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34 import java.util.LinkedHashMap;
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35 import java.util.LinkedList;
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36 import java.util.List;
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37 import java.util.Map;
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38 import java.util.prefs.BackingStoreException;
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39 import java.util.prefs.Preferences;
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40
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41 import javax.net.ssl.HttpsURLConnection;
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42 import javax.net.ssl.SSLContext;
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43 import javax.net.ssl.TrustManager;
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44 import javax.net.ssl.X509TrustManager;
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45
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46 import org.tmatesoft.hg.core.HgBadStateException;
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47 import org.tmatesoft.hg.core.HgException;
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48 import org.tmatesoft.hg.core.Nodeid;
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49
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50 /**
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51 * WORK IN PROGRESS, DO NOT USE
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52 *
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53 * @see http://mercurial.selenic.com/wiki/WireProtocol
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54 *
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55 * @author Artem Tikhomirov
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56 * @author TMate Software Ltd.
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57 */
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58 public class HgRemoteRepository {
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59
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60 private final URL url;
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61 private final SSLContext sslContext;
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62 private final String authInfo;
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63 private final boolean debug = Boolean.FALSE.booleanValue();
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64
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65 HgRemoteRepository(URL url) throws HgException {
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66 if (url == null) {
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67 throw new IllegalArgumentException();
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68 }
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69 this.url = url;
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70 if ("https".equals(url.getProtocol())) {
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71 try {
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72 sslContext = SSLContext.getInstance("SSL");
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73 class TrustEveryone implements X509TrustManager {
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74 public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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75 System.out.println("checkClientTrusted " + authType);
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76 }
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77 public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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78 System.out.println("checkServerTrusted" + authType);
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79 }
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80 public X509Certificate[] getAcceptedIssuers() {
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81 return new X509Certificate[0];
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82 }
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83 };
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84 sslContext.init(null, new TrustManager[] { new TrustEveryone() }, null);
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85 } catch (Exception ex) {
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86 throw new HgException(ex);
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87 }
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88 } else {
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89 sslContext = null;
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90 }
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91 if (url.getUserInfo() != null) {
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92 String ai = null;
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93 try {
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94 // Hack to get Base64-encoded credentials
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95 Preferences tempNode = Preferences.userRoot().node("xxx");
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96 tempNode.putByteArray("xxx", url.getUserInfo().getBytes());
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97 ai = tempNode.get("xxx", null);
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98 tempNode.removeNode();
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99 } catch (BackingStoreException ex) {
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100 ex.printStackTrace();
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101 // IGNORE
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102 }
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103 authInfo = ai;
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104 } else {
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105 authInfo = null;
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106 }
171
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107 }
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108
178
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109 public List<Nodeid> heads() throws HgException {
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110 try {
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111 URL u = new URL(url, url.getPath() + "?cmd=heads");
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112 HttpURLConnection c = setupConnection(u.openConnection());
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113 c.connect();
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114 if (debug) {
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115 dumpResponseHeader(u, c);
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116 }
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117 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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118 StreamTokenizer st = new StreamTokenizer(is);
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119 st.ordinaryChars('0', '9');
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120 st.wordChars('0', '9');
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121 st.eolIsSignificant(false);
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122 LinkedList<Nodeid> parseResult = new LinkedList<Nodeid>();
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123 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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124 parseResult.add(Nodeid.fromAscii(st.sval));
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125 }
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126 return parseResult;
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127 } catch (MalformedURLException ex) {
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128 throw new HgException(ex);
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129 } catch (IOException ex) {
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130 throw new HgException(ex);
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131 }
171
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132 }
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133
176
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134 public List<Nodeid> between(Nodeid tip, Nodeid base) throws HgException {
177
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135 Range r = new Range(base, tip);
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136 // XXX shall handle errors like no range key in the returned map, not sure how.
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137 return between(Collections.singletonList(r)).get(r);
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138 }
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139
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140 /**
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141 * @param ranges
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142 * @return map, where keys are input instances, values are corresponding server reply
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143 * @throws HgException
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144 */
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145 public Map<Range, List<Nodeid>> between(Collection<Range> ranges) throws HgException {
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146 if (ranges.isEmpty()) {
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147 return Collections.emptyMap();
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148 }
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149 // if fact, shall do other way round, this method shall send
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150 LinkedHashMap<Range, List<Nodeid>> rv = new LinkedHashMap<HgRemoteRepository.Range, List<Nodeid>>(ranges.size() * 4 / 3);
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151 StringBuilder sb = new StringBuilder(20 + ranges.size() * 82);
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152 sb.append("pairs=");
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153 for (Range r : ranges) {
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154 sb.append(r.end.toString());
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155 sb.append('-');
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156 sb.append(r.start.toString());
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157 sb.append('+');
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158 }
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159 if (sb.charAt(sb.length() - 1) == '+') {
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160 // strip last space
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161 sb.setLength(sb.length() - 1);
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162 }
176
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163 try {
177
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164 boolean usePOST = ranges.size() > 3;
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165 URL u = new URL(url, url.getPath() + "?cmd=between" + (usePOST ? "" : '&' + sb.toString()));
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166 HttpURLConnection c = setupConnection(u.openConnection());
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167 if (usePOST) {
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168 c.setRequestMethod("POST");
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169 c.setRequestProperty("Content-Length", String.valueOf(sb.length()/*nodeids are ASCII, bytes == characters */));
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170 c.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
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171 c.setDoOutput(true);
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172 c.connect();
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173 OutputStream os = c.getOutputStream();
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174 os.write(sb.toString().getBytes());
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175 os.flush();
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diff changeset
176 os.close();
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diff changeset
177 } else {
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diff changeset
178 c.connect();
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179 }
178
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180 if (debug) {
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181 System.out.printf("%d ranges, method:%s \n", ranges.size(), c.getRequestMethod());
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diff changeset
182 dumpResponseHeader(u, c);
176
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183 }
177
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184 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
176
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185 StreamTokenizer st = new StreamTokenizer(is);
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186 st.ordinaryChars('0', '9');
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187 st.wordChars('0', '9');
177
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188 st.eolIsSignificant(true);
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189 Iterator<Range> rangeItr = ranges.iterator();
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190 LinkedList<Nodeid> currRangeList = null;
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191 Range currRange = null;
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diff changeset
192 boolean possiblyEmptyNextLine = true;
176
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diff changeset
193 while (st.nextToken() != StreamTokenizer.TT_EOF) {
177
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diff changeset
194 if (st.ttype == StreamTokenizer.TT_EOL) {
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diff changeset
195 if (possiblyEmptyNextLine) {
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diff changeset
196 // newline follows newline;
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diff changeset
197 assert currRange == null;
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198 assert currRangeList == null;
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diff changeset
199 if (!rangeItr.hasNext()) {
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200 throw new HgBadStateException();
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201 }
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diff changeset
202 rv.put(rangeItr.next(), Collections.<Nodeid>emptyList());
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203 } else {
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diff changeset
204 if (currRange == null || currRangeList == null) {
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205 throw new HgBadStateException();
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diff changeset
206 }
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diff changeset
207 // indicate next range value is needed
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diff changeset
208 currRange = null;
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209 currRangeList = null;
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210 possiblyEmptyNextLine = true;
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211 }
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212 } else {
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213 possiblyEmptyNextLine = false;
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214 if (currRange == null) {
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215 if (!rangeItr.hasNext()) {
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216 throw new HgBadStateException();
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217 }
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218 currRange = rangeItr.next();
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219 currRangeList = new LinkedList<Nodeid>();
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220 rv.put(currRange, currRangeList);
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221 }
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222 Nodeid nid = Nodeid.fromAscii(st.sval);
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223 currRangeList.addLast(nid);
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224 }
176
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225 }
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226 is.close();
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227 return rv;
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228 } catch (MalformedURLException ex) {
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229 throw new HgException(ex);
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230 } catch (IOException ex) {
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231 throw new HgException(ex);
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232 }
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233 }
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234
178
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235 public List<RemoteBranch> branches(List<Nodeid> nodes) throws HgException {
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236 StringBuilder sb = new StringBuilder(20 + nodes.size() * 41);
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237 sb.append("nodes=");
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238 for (Nodeid n : nodes) {
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239 sb.append(n.toString());
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240 sb.append('+');
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241 }
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242 if (sb.charAt(sb.length() - 1) == '+') {
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243 // strip last space
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244 sb.setLength(sb.length() - 1);
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245 }
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diff changeset
246 try {
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247 URL u = new URL(url, url.getPath() + "?cmd=branches&" + sb.toString());
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248 HttpURLConnection c = setupConnection(u.openConnection());
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249 c.connect();
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250 if (debug) {
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diff changeset
251 dumpResponseHeader(u, c);
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252 }
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253 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
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254 StreamTokenizer st = new StreamTokenizer(is);
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255 st.ordinaryChars('0', '9');
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256 st.wordChars('0', '9');
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257 st.eolIsSignificant(false);
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258 ArrayList<Nodeid> parseResult = new ArrayList<Nodeid>(nodes.size() * 4);
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259 while (st.nextToken() != StreamTokenizer.TT_EOF) {
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260 parseResult.add(Nodeid.fromAscii(st.sval));
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261 }
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262 if (parseResult.size() != nodes.size() * 4) {
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263 throw new HgException(String.format("Bad number of nodeids in result (shall be factor 4), expected %d, got %d", nodes.size()*4, parseResult.size()));
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264 }
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265 ArrayList<RemoteBranch> rv = new ArrayList<RemoteBranch>(nodes.size());
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266 for (int i = 0; i < nodes.size(); i++) {
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267 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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268 rv.add(rb);
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269 }
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270 return rv;
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271 } catch (MalformedURLException ex) {
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272 throw new HgException(ex);
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diff changeset
273 } catch (IOException ex) {
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diff changeset
274 throw new HgException(ex);
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275 }
171
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276 }
170
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277
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278 // 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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279 public HgBundle getChanges(List<Nodeid> roots) throws HgException {
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280 return new HgLookup().loadBundle(new File("/temp/hg/hg-bundle-000000000000-gz.tmp"));
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281 }
176
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282
177
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diff changeset
283 private HttpURLConnection setupConnection(URLConnection urlConnection) {
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diff changeset
284 urlConnection.setRequestProperty("User-Agent", "hg4j/0.5.0");
176
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285 urlConnection.addRequestProperty("Accept", "application/mercurial-0.1");
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diff changeset
286 if (authInfo != null) {
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287 urlConnection.addRequestProperty("Authorization", "Basic " + authInfo);
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diff changeset
288 }
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diff changeset
289 if (sslContext != null) {
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290 ((HttpsURLConnection) urlConnection).setSSLSocketFactory(sslContext.getSocketFactory());
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291 }
177
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diff changeset
292 return (HttpURLConnection) urlConnection;
176
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293 }
171
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294
178
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diff changeset
295 private void dumpResponseHeader(URL u, HttpURLConnection c) {
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diff changeset
296 System.out.printf("Query (%d bytes):%s\n", u.getQuery().length(), u.getQuery());
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297 System.out.println("Response headers:");
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diff changeset
298 final Map<String, List<String>> headerFields = c.getHeaderFields();
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diff changeset
299 for (String s : headerFields.keySet()) {
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diff changeset
300 System.out.printf("%s: %s\n", s, c.getHeaderField(s));
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diff changeset
301 }
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diff changeset
302 }
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diff changeset
303
176
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304 public static final class Range {
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305 /**
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diff changeset
306 * Root of the range, earlier revision
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307 */
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308 public final Nodeid start;
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309 /**
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diff changeset
310 * Head of the range, later revision.
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311 */
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diff changeset
312 public final Nodeid end;
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diff changeset
313
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314 /**
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315 * @param from - root/base revision
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316 * @param to - head/tip revision
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317 */
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318 public Range(Nodeid from, Nodeid to) {
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319 start = from;
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320 end = to;
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321 }
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322 }
171
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323 public static final class RemoteBranch {
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324 public final Nodeid head, root, p1, p2;
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325
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326 public RemoteBranch(Nodeid h, Nodeid r, Nodeid parent1, Nodeid parent2) {
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327 head = h;
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328 root = r;
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329 p1 = parent1;
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330 p2 = parent2;
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331 }
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332
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333 @Override
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334 public boolean equals(Object obj) {
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335 if (this == obj) {
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336 return true;
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337 }
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338 if (false == obj instanceof RemoteBranch) {
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339 return false;
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340 }
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341 RemoteBranch o = (RemoteBranch) obj;
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342 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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343 }
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344 }
170
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345 }