1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.io;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.io.IOException;
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7 | import java.net.InetSocketAddress;
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8 | import java.net.Proxy;
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9 | import java.net.Proxy.Type;
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10 | import java.net.ProxySelector;
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11 | import java.net.SocketAddress;
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12 | import java.net.URI;
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13 | import java.util.Arrays;
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14 | import java.util.Collections;
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15 | import java.util.HashSet;
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16 | import java.util.List;
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17 | import java.util.Set;
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18 | import java.util.TreeSet;
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19 |
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20 | import org.openstreetmap.josm.Main;
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21 | import org.openstreetmap.josm.gui.preferences.server.ProxyPreferencesPanel;
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22 | import org.openstreetmap.josm.gui.preferences.server.ProxyPreferencesPanel.ProxyPolicy;
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23 |
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24 | /**
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25 | * This is the default proxy selector used in JOSM.
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26 | *
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27 | */
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28 | public class DefaultProxySelector extends ProxySelector {
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29 |
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30 | private static final List<Proxy> NO_PROXY_LIST = Collections.singletonList(Proxy.NO_PROXY);
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31 |
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32 | private static final String IPV4_LOOPBACK = "127.0.0.1";
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33 | private static final String IPV6_LOOPBACK = "::1";
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34 |
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35 | /**
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36 | * The {@link ProxySelector} provided by the JDK will retrieve proxy information
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37 | * from the system settings, if the system property <tt>java.net.useSystemProxies</tt>
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38 | * is defined <strong>at startup</strong>. It has no effect if the property is set
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39 | * later by the application.
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40 | *
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41 | * We therefore read the property at class loading time and remember it's value.
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42 | */
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43 | private static boolean JVM_WILL_USE_SYSTEM_PROXIES;
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44 | static {
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45 | String v = System.getProperty("java.net.useSystemProxies");
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46 | if (v != null && v.equals(Boolean.TRUE.toString())) {
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47 | JVM_WILL_USE_SYSTEM_PROXIES = true;
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48 | }
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49 | }
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50 |
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51 | /**
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52 | * The {@link ProxySelector} provided by the JDK will retrieve proxy information
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53 | * from the system settings, if the system property <tt>java.net.useSystemProxies</tt>
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54 | * is defined <strong>at startup</strong>. If the property is set later by the application,
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55 | * this has no effect.
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56 | *
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57 | * @return true, if <tt>java.net.useSystemProxies</tt> was set to true at class initialization time
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58 | *
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59 | */
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60 | public static boolean willJvmRetrieveSystemProxies() {
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61 | return JVM_WILL_USE_SYSTEM_PROXIES;
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62 | }
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63 |
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64 | private ProxyPolicy proxyPolicy;
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65 | private InetSocketAddress httpProxySocketAddress;
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66 | private InetSocketAddress socksProxySocketAddress;
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67 | private final ProxySelector delegate;
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68 |
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69 | private final Set<String> errorResources = new HashSet<>();
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70 | private final Set<String> errorMessages = new HashSet<>();
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71 | private Set<String> proxyExceptions;
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72 |
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73 | /**
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74 | * A typical example is:
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75 | * <pre>
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76 | * PropertySelector delegate = PropertySelector.getDefault();
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77 | * PropertySelector.setDefault(new DefaultPropertySelector(delegate));
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78 | * </pre>
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79 | *
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80 | * @param delegate the proxy selector to delegate to if system settings are used. Usually
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81 | * this is the proxy selector found by ProxySelector.getDefault() before this proxy
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82 | * selector is installed
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83 | */
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84 | public DefaultProxySelector(ProxySelector delegate) {
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85 | this.delegate = delegate;
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86 | initFromPreferences();
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87 | }
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88 |
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89 | protected int parseProxyPortValue(String property, String value) {
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90 | if (value == null) return 0;
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91 | int port = 0;
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92 | try {
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93 | port = Integer.parseInt(value);
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94 | } catch (NumberFormatException e) {
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95 | Main.error(tr("Unexpected format for port number in preference ''{0}''. Got ''{1}''.", property, value));
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96 | Main.error(tr("The proxy will not be used."));
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97 | return 0;
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98 | }
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99 | if (port <= 0 || port > 65_535) {
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100 | Main.error(tr("Illegal port number in preference ''{0}''. Got {1}.", property, port));
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101 | Main.error(tr("The proxy will not be used."));
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102 | return 0;
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103 | }
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104 | return port;
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105 | }
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106 |
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107 | /**
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108 | * Initializes the proxy selector from the setting in the preferences.
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109 | *
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110 | */
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111 | public final void initFromPreferences() {
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112 | String value = Main.pref.get(ProxyPreferencesPanel.PROXY_POLICY);
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113 | if (value.isEmpty()) {
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114 | proxyPolicy = ProxyPolicy.NO_PROXY;
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115 | } else {
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116 | proxyPolicy = ProxyPolicy.fromName(value);
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117 | if (proxyPolicy == null) {
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118 | Main.warn(tr("Unexpected value for preference ''{0}'' found. Got ''{1}''. Will use no proxy.",
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119 | ProxyPreferencesPanel.PROXY_POLICY, value));
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120 | proxyPolicy = ProxyPolicy.NO_PROXY;
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121 | }
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122 | }
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123 | String host = Main.pref.get(ProxyPreferencesPanel.PROXY_HTTP_HOST, null);
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124 | int port = parseProxyPortValue(ProxyPreferencesPanel.PROXY_HTTP_PORT, Main.pref.get(ProxyPreferencesPanel.PROXY_HTTP_PORT, null));
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125 | httpProxySocketAddress = null;
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126 | if (proxyPolicy.equals(ProxyPolicy.USE_HTTP_PROXY)) {
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127 | if (host != null && !host.trim().isEmpty() && port > 0) {
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128 | httpProxySocketAddress = new InetSocketAddress(host, port);
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129 | } else {
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130 | Main.warn(tr("Unexpected parameters for HTTP proxy. Got host ''{0}'' and port ''{1}''.", host, port));
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131 | Main.warn(tr("The proxy will not be used."));
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132 | }
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133 | }
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134 |
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135 | host = Main.pref.get(ProxyPreferencesPanel.PROXY_SOCKS_HOST, null);
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136 | port = parseProxyPortValue(ProxyPreferencesPanel.PROXY_SOCKS_PORT, Main.pref.get(ProxyPreferencesPanel.PROXY_SOCKS_PORT, null));
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137 | socksProxySocketAddress = null;
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138 | if (proxyPolicy.equals(ProxyPolicy.USE_SOCKS_PROXY)) {
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139 | if (host != null && !host.trim().isEmpty() && port > 0) {
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140 | socksProxySocketAddress = new InetSocketAddress(host, port);
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141 | } else {
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142 | Main.warn(tr("Unexpected parameters for SOCKS proxy. Got host ''{0}'' and port ''{1}''.", host, port));
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143 | Main.warn(tr("The proxy will not be used."));
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144 | }
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145 | }
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146 | proxyExceptions = new HashSet<>(
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147 | Main.pref.getCollection(ProxyPreferencesPanel.PROXY_EXCEPTIONS,
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148 | Arrays.asList(new String[]{"localhost", IPV4_LOOPBACK, IPV6_LOOPBACK}))
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149 | );
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150 | }
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151 |
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152 | @Override
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153 | public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
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154 | // Just log something. The network stack will also throw an exception which will be caught somewhere else
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155 | Main.error(tr("Connection to proxy ''{0}'' for URI ''{1}'' failed. Exception was: {2}", sa.toString(), uri.toString(), ioe.toString()));
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156 | // Remember errors to give a friendly user message asking to review proxy configuration
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157 | errorResources.add(uri.toString());
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158 | errorMessages.add(ioe.toString());
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159 | }
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160 |
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161 | /**
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162 | * Returns the set of current proxy resources that failed to be retrieved.
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163 | * @return the set of current proxy resources that failed to be retrieved
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164 | * @since 6523
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165 | */
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166 | public final Set<String> getErrorResources() {
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167 | return new TreeSet<>(errorResources);
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168 | }
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169 |
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170 | /**
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171 | * Returns the set of current proxy error messages.
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172 | * @return the set of current proxy error messages
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173 | * @since 6523
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174 | */
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175 | public final Set<String> getErrorMessages() {
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176 | return new TreeSet<>(errorMessages);
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177 | }
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178 |
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179 | /**
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180 | * Clear the sets of failed resources and error messages.
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181 | * @since 6523
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182 | */
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183 | public final void clearErrors() {
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184 | errorResources.clear();
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185 | errorMessages.clear();
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186 | }
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187 |
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188 | /**
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189 | * Determines if proxy errors have occured.
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190 | * @return {@code true} if errors have occured, {@code false} otherwise.
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191 | * @since 6523
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192 | */
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193 | public final boolean hasErrors() {
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194 | return !errorResources.isEmpty();
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195 | }
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196 |
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197 | @Override
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198 | public List<Proxy> select(URI uri) {
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199 | if (uri != null && proxyExceptions.contains(uri.getHost())) {
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200 | return NO_PROXY_LIST;
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201 | }
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202 | switch(proxyPolicy) {
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203 | case USE_SYSTEM_SETTINGS:
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204 | if (!JVM_WILL_USE_SYSTEM_PROXIES) {
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205 | Main.warn(tr("The JVM is not configured to lookup proxies from the system settings. "+
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206 | "The property ''java.net.useSystemProxies'' was missing at startup time. Will not use a proxy."));
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207 | return NO_PROXY_LIST;
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208 | }
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209 | // delegate to the former proxy selector
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210 | return delegate.select(uri);
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211 | case NO_PROXY:
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212 | return NO_PROXY_LIST;
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213 | case USE_HTTP_PROXY:
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214 | if (httpProxySocketAddress == null)
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215 | return NO_PROXY_LIST;
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216 | return Collections.singletonList(new Proxy(Type.HTTP, httpProxySocketAddress));
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217 | case USE_SOCKS_PROXY:
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218 | if (socksProxySocketAddress == null)
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219 | return NO_PROXY_LIST;
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220 | return Collections.singletonList(new Proxy(Type.SOCKS, socksProxySocketAddress));
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221 | }
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222 | // should not happen
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223 | return null;
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224 | }
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225 | }
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