1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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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.BufferedReader;
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7 | import java.io.IOException;
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8 | import java.io.InputStream;
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9 | import java.io.InputStreamReader;
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10 | import java.net.HttpURLConnection;
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11 | import java.net.MalformedURLException;
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12 | import java.net.URL;
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13 | import java.util.zip.GZIPInputStream;
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14 | import java.util.zip.Inflater;
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15 | import java.util.zip.InflaterInputStream;
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16 |
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17 | import org.openstreetmap.josm.Main;
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18 | import org.openstreetmap.josm.data.gpx.GpxData;
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19 | import org.openstreetmap.josm.data.osm.DataSet;
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20 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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21 | import org.openstreetmap.josm.tools.Utils;
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22 |
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23 | /**
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24 | * This DataReader reads directly from the REST API of the osm server.
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25 | *
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26 | * It supports plain text transfer as well as gzip or deflate encoded transfers;
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27 | * if compressed transfers are unwanted, set property osm-server.use-compression
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28 | * to false.
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29 | *
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30 | * @author imi
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31 | */
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32 | public abstract class OsmServerReader extends OsmConnection {
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33 | private OsmApi api = OsmApi.getOsmApi();
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34 | private boolean doAuthenticate = false;
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35 | protected boolean gpxParsedProperly;
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36 |
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37 | protected enum Compression {
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38 | NONE,
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39 | BZIP2,
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40 | GZIP
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41 | }
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42 |
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43 | /**
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44 | * Open a connection to the given url and return a reader on the input stream
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45 | * from that connection. In case of user cancel, return <code>null</code>.
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46 | * Relative URL's are directed to API base URL.
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47 | * @param urlStr The url to connect to.
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48 | * @param progressMonitor progress monitoring and abort handler
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49 | * @return An reader reading the input stream (servers answer) or <code>null</code>.
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50 | * @throws OsmTransferException thrown if data transfer errors occur
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51 | */
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52 | protected InputStream getInputStream(String urlStr, ProgressMonitor progressMonitor) throws OsmTransferException {
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53 | try {
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54 | api.initialize(progressMonitor);
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55 | urlStr = urlStr.startsWith("http") ? urlStr : (getBaseUrl() + urlStr);
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56 | return getInputStreamRaw(urlStr, progressMonitor);
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57 | } finally {
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58 | progressMonitor.invalidate();
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59 | }
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60 | }
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61 |
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62 | /**
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63 | * Retrun the base URL for relative URL requests
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64 | * @return base url of API
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65 | */
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66 | protected String getBaseUrl() {
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67 | return api.getBaseUrl();
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68 | }
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69 |
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70 | /**
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71 | * Open a connection to the given url and return a reader on the input stream
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72 | * from that connection. In case of user cancel, return <code>null</code>.
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73 | * @param urlStr The exact url to connect to.
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74 | * @param progressMonitor progress monitoring and abort handler
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75 | * @return An reader reading the input stream (servers answer) or <code>null</code>.
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76 | * @throws OsmTransferException thrown if data transfer errors occur
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77 | */
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78 | protected InputStream getInputStreamRaw(String urlStr, ProgressMonitor progressMonitor) throws OsmTransferException {
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79 | try {
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80 | URL url = null;
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81 | try {
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82 | url = new URL(urlStr.replace(" ", "%20"));
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83 | } catch(MalformedURLException e) {
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84 | throw new OsmTransferException(e);
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85 | }
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86 | try {
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87 | // fix #7640, see http://www.tikalk.com/java/forums/httpurlconnection-disable-keep-alive
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88 | activeConnection = Utils.openHttpConnection(url, false);
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89 | } catch(Exception e) {
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90 | throw new OsmTransferException(tr("Failed to open connection to API {0}.", url.toExternalForm()), e);
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91 | }
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92 | if (cancel) {
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93 | activeConnection.disconnect();
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94 | return null;
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95 | }
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96 |
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97 | if (doAuthenticate) {
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98 | addAuth(activeConnection);
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99 | }
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100 | if (cancel)
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101 | throw new OsmTransferCanceledException();
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102 | if (Main.pref.getBoolean("osm-server.use-compression", true)) {
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103 | activeConnection.setRequestProperty("Accept-Encoding", "gzip, deflate");
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104 | }
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105 |
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106 | activeConnection.setConnectTimeout(Main.pref.getInteger("socket.timeout.connect",15)*1000);
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107 |
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108 | try {
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109 | Main.info("GET " + url);
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110 | activeConnection.connect();
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111 | } catch (Exception e) {
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112 | e.printStackTrace();
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113 | OsmTransferException ote = new OsmTransferException(tr("Could not connect to the OSM server. Please check your internet connection."), e);
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114 | ote.setUrl(url.toString());
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115 | throw ote;
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116 | }
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117 | try {
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118 | if (activeConnection.getResponseCode() == HttpURLConnection.HTTP_UNAUTHORIZED)
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119 | throw new OsmApiException(HttpURLConnection.HTTP_UNAUTHORIZED,null,null);
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120 |
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121 | if (activeConnection.getResponseCode() == HttpURLConnection.HTTP_PROXY_AUTH)
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122 | throw new OsmTransferCanceledException();
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123 |
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124 | String encoding = activeConnection.getContentEncoding();
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125 | if (activeConnection.getResponseCode() != HttpURLConnection.HTTP_OK) {
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126 | String errorHeader = activeConnection.getHeaderField("Error");
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127 | StringBuilder errorBody = new StringBuilder();
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128 | try
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129 | {
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130 | InputStream i = FixEncoding(activeConnection.getErrorStream(), encoding);
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131 | if (i != null) {
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132 | BufferedReader in = new BufferedReader(new InputStreamReader(i));
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133 | String s;
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134 | while((s = in.readLine()) != null) {
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135 | errorBody.append(s);
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136 | errorBody.append("\n");
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137 | }
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138 | }
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139 | }
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140 | catch(Exception e) {
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141 | errorBody.append(tr("Reading error text failed."));
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142 | }
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143 |
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144 | throw new OsmApiException(activeConnection.getResponseCode(), errorHeader, errorBody.toString(), url.toString());
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145 | }
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146 |
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147 | return FixEncoding(new ProgressInputStream(activeConnection, progressMonitor), encoding);
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148 | } catch (OsmTransferException e) {
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149 | throw e;
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150 | } catch (Exception e) {
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151 | throw new OsmTransferException(e);
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152 | }
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153 | } finally {
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154 | progressMonitor.invalidate();
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155 | }
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156 | }
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157 |
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158 | private InputStream FixEncoding(InputStream stream, String encoding) throws IOException
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159 | {
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160 | if ("gzip".equalsIgnoreCase(encoding)) {
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161 | stream = new GZIPInputStream(stream);
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162 | }
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163 | else if ("deflate".equalsIgnoreCase(encoding)) {
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164 | stream = new InflaterInputStream(stream, new Inflater(true));
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165 | }
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166 | return stream;
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167 | }
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168 |
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169 | /**
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170 | * Download OSM files from somewhere
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171 | * @param progressMonitor The progress monitor
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172 | * @return The corresponding dataset
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173 | * @throws OsmTransferException if any error occurs
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174 | */
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175 | public abstract DataSet parseOsm(final ProgressMonitor progressMonitor) throws OsmTransferException;
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176 |
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177 | /**
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178 | * Download OSM Change files from somewhere
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179 | * @param progressMonitor The progress monitor
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180 | * @return The corresponding dataset
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181 | * @throws OsmTransferException if any error occurs
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182 | */
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183 | public DataSet parseOsmChange(final ProgressMonitor progressMonitor) throws OsmTransferException {
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184 | return null;
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185 | }
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186 |
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187 | /**
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188 | * Download BZip2-compressed OSM Change files from somewhere
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189 | * @param progressMonitor The progress monitor
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190 | * @return The corresponding dataset
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191 | * @throws OsmTransferException if any error occurs
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192 | */
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193 | public DataSet parseOsmChangeBzip2(final ProgressMonitor progressMonitor) throws OsmTransferException {
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194 | return null;
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195 | }
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196 |
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197 | /**
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198 | * Download GZip-compressed OSM Change files from somewhere
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199 | * @param progressMonitor The progress monitor
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200 | * @return The corresponding dataset
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201 | * @throws OsmTransferException if any error occurs
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202 | */
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203 | public DataSet parseOsmChangeGzip(final ProgressMonitor progressMonitor) throws OsmTransferException {
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204 | return null;
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205 | }
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206 |
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207 | /**
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208 | * Retrieve raw gps waypoints from the server API.
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209 | * @param progressMonitor The progress monitor
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210 | * @return The corresponding GPX tracks
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211 | * @throws OsmTransferException if any error occurs
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212 | */
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213 | public GpxData parseRawGps(final ProgressMonitor progressMonitor) throws OsmTransferException {
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214 | return null;
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215 | }
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216 |
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217 | /**
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218 | * Retrieve BZip2-compressed GPX files from somewhere.
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219 | * @param progressMonitor The progress monitor
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220 | * @return The corresponding GPX tracks
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221 | * @throws OsmTransferException if any error occurs
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222 | * @since 6244
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223 | */
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224 | public GpxData parseRawGpsBzip2(final ProgressMonitor progressMonitor) throws OsmTransferException {
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225 | return null;
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226 | }
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227 |
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228 | /**
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229 | * Download BZip2-compressed OSM files from somewhere
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230 | * @param progressMonitor The progress monitor
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231 | * @return The corresponding dataset
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232 | * @throws OsmTransferException if any error occurs
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233 | */
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234 | public DataSet parseOsmBzip2(final ProgressMonitor progressMonitor) throws OsmTransferException {
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235 | return null;
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236 | }
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237 |
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238 | /**
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239 | * Download GZip-compressed OSM files from somewhere
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240 | * @param progressMonitor The progress monitor
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241 | * @return The corresponding dataset
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242 | * @throws OsmTransferException if any error occurs
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243 | */
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244 | public DataSet parseOsmGzip(final ProgressMonitor progressMonitor) throws OsmTransferException {
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245 | return null;
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246 | }
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247 |
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248 | /**
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249 | * Returns true if this reader is adding authentication credentials to the read
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250 | * request sent to the server.
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251 | *
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252 | * @return true if this reader is adding authentication credentials to the read
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253 | * request sent to the server
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254 | */
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255 | public boolean isDoAuthenticate() {
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256 | return doAuthenticate;
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257 | }
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258 |
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259 | /**
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260 | * Sets whether this reader adds authentication credentials to the read
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261 | * request sent to the server.
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262 | *
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263 | * @param doAuthenticate true if this reader adds authentication credentials to the read
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264 | * request sent to the server
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265 | */
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266 | public void setDoAuthenticate(boolean doAuthenticate) {
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267 | this.doAuthenticate = doAuthenticate;
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268 | }
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269 |
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270 | /**
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271 | * Determines if the GPX data has been parsed properly.
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272 | * @return true if the GPX data has been parsed properly, false otherwise
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273 | * @see GpxReader#parse
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274 | */
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275 | public final boolean isGpxParsedProperly() {
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276 | return gpxParsedProperly;
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277 | }
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278 | }
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