[5617] | 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.io.imagery;
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| 3 |
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| 4 | import java.awt.HeadlessException;
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| 5 | import java.io.IOException;
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| 6 | import java.io.StringReader;
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| 7 | import java.net.MalformedURLException;
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| 8 | import java.net.URL;
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[6000] | 9 | import java.util.ArrayList;
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[5617] | 10 | import java.util.Collection;
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[6930] | 11 | import java.util.Collections;
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[5617] | 12 | import java.util.HashSet;
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[10612] | 13 | import java.util.Iterator;
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[5617] | 14 | import java.util.List;
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[8404] | 15 | import java.util.Locale;
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[10612] | 16 | import java.util.NoSuchElementException;
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[5617] | 17 | import java.util.Set;
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| 18 | import java.util.regex.Pattern;
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[10612] | 19 | import java.util.stream.Collectors;
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| 20 | import java.util.stream.Stream;
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| 21 | import java.util.stream.StreamSupport;
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[5731] | 22 |
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[6930] | 23 | import javax.imageio.ImageIO;
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[5617] | 24 | import javax.xml.parsers.DocumentBuilder;
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[10212] | 25 | import javax.xml.parsers.ParserConfigurationException;
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[5731] | 26 |
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[6248] | 27 | import org.openstreetmap.josm.Main;
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[5617] | 28 | import org.openstreetmap.josm.data.Bounds;
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| 29 | import org.openstreetmap.josm.data.imagery.ImageryInfo;
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[9107] | 30 | import org.openstreetmap.josm.data.projection.Projections;
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[9171] | 31 | import org.openstreetmap.josm.tools.HttpClient;
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[5617] | 32 | import org.openstreetmap.josm.tools.Utils;
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| 33 | import org.w3c.dom.Document;
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| 34 | import org.w3c.dom.Element;
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| 35 | import org.w3c.dom.Node;
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| 36 | import org.w3c.dom.NodeList;
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| 37 | import org.xml.sax.InputSource;
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| 38 | import org.xml.sax.SAXException;
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| 39 |
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[10612] | 40 | /**
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| 41 | * This class represents the capabilites of a WMS imagery server.
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| 42 | */
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[5617] | 43 | public class WMSImagery {
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| 44 |
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[10612] | 45 | private static final class ChildIterator implements Iterator<Element> {
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| 46 | private Element child;
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| 47 |
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| 48 | ChildIterator(Element parent) {
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| 49 | child = advanceToElement(parent.getFirstChild());
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| 50 | }
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| 51 |
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| 52 | private static Element advanceToElement(Node firstChild) {
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| 53 | Node node = firstChild;
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| 54 | while (node != null && !(node instanceof Element)) {
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| 55 | node = node.getNextSibling();
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| 56 | }
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| 57 | return (Element) node;
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| 58 | }
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| 59 |
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| 60 | @Override
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| 61 | public boolean hasNext() {
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| 62 | return child != null;
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| 63 | }
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| 64 |
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| 65 | @Override
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| 66 | public Element next() {
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| 67 | if (!hasNext()) {
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| 68 | throw new NoSuchElementException("No next sibling.");
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| 69 | }
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| 70 | Element next = child;
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| 71 | child = advanceToElement(child.getNextSibling());
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| 72 | return next;
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| 73 | }
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| 74 | }
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| 75 |
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| 76 | /**
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| 77 | * An exception that is thrown if there was an error while getting the capabilities of the WMS server.
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| 78 | */
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[5617] | 79 | public static class WMSGetCapabilitiesException extends Exception {
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| 80 | private final String incomingData;
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| 81 |
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[10520] | 82 | /**
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| 83 | * Constructs a new {@code WMSGetCapabilitiesException}
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| 84 | * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method)
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| 85 | * @param incomingData the answer from WMS server
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| 86 | */
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[5617] | 87 | public WMSGetCapabilitiesException(Throwable cause, String incomingData) {
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| 88 | super(cause);
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| 89 | this.incomingData = incomingData;
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| 90 | }
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| 91 |
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[10520] | 92 | /**
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| 93 | * Constructs a new {@code WMSGetCapabilitiesException}
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| 94 | * @param message the detail message. The detail message is saved for later retrieval by the {@link #getMessage()} method
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| 95 | * @param incomingData the answer from the server
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| 96 | * @since 10520
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| 97 | */
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| 98 | public WMSGetCapabilitiesException(String message, String incomingData) {
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| 99 | super(message);
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| 100 | this.incomingData = incomingData;
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| 101 | }
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| 102 |
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| 103 | /**
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[10612] | 104 | * The data that caused this exception.
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| 105 | * @return The server response to the capabilites request.
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[10520] | 106 | */
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[5617] | 107 | public String getIncomingData() {
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| 108 | return incomingData;
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| 109 | }
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| 110 | }
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| 111 |
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| 112 | private List<LayerDetails> layers;
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| 113 | private URL serviceUrl;
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[6000] | 114 | private List<String> formats;
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[5617] | 115 |
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[10216] | 116 | /**
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| 117 | * Returns the list of layers.
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| 118 | * @return the list of layers
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| 119 | */
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[5617] | 120 | public List<LayerDetails> getLayers() {
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[10612] | 121 | return Collections.unmodifiableList(layers);
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[5617] | 122 | }
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| 123 |
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[10216] | 124 | /**
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| 125 | * Returns the service URL.
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| 126 | * @return the service URL
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| 127 | */
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[5617] | 128 | public URL getServiceUrl() {
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| 129 | return serviceUrl;
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| 130 | }
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| 131 |
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[10216] | 132 | /**
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| 133 | * Returns the list of supported formats.
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| 134 | * @return the list of supported formats
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| 135 | */
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[6000] | 136 | public List<String> getFormats() {
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[6930] | 137 | return Collections.unmodifiableList(formats);
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[6000] | 138 | }
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| 139 |
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[10612] | 140 | /**
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| 141 | * Gets the preffered format for this imagery layer.
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| 142 | * @return The preffered format as mime type.
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| 143 | */
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[6930] | 144 | public String getPreferredFormats() {
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[10612] | 145 | if (formats.contains("image/jpeg")) {
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| 146 | return "image/jpeg";
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| 147 | } else if (formats.contains("image/png")) {
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| 148 | return "image/png";
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| 149 | } else if (formats.isEmpty()) {
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| 150 | return null;
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| 151 | } else {
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| 152 | return formats.get(0);
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| 153 | }
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[6930] | 154 | }
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| 155 |
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[5617] | 156 | String buildRootUrl() {
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[5731] | 157 | if (serviceUrl == null) {
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[6070] | 158 | return null;
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[5731] | 159 | }
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[5617] | 160 | StringBuilder a = new StringBuilder(serviceUrl.getProtocol());
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[8390] | 161 | a.append("://").append(serviceUrl.getHost());
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[5617] | 162 | if (serviceUrl.getPort() != -1) {
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[8390] | 163 | a.append(':').append(serviceUrl.getPort());
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[5617] | 164 | }
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[8390] | 165 | a.append(serviceUrl.getPath()).append('?');
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[5617] | 166 | if (serviceUrl.getQuery() != null) {
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| 167 | a.append(serviceUrl.getQuery());
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| 168 | if (!serviceUrl.getQuery().isEmpty() && !serviceUrl.getQuery().endsWith("&")) {
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[8390] | 169 | a.append('&');
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[5617] | 170 | }
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| 171 | }
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| 172 | return a.toString();
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| 173 | }
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| 174 |
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[12475] | 175 | /**
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| 176 | * Returns the URL for the "GetMap" WMS request in JPEG format.
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| 177 | * @param selectedLayers the list of selected layers, matching the "LAYERS" WMS request argument
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| 178 | * @return the URL for the "GetMap" WMS request
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| 179 | */
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[5617] | 180 | public String buildGetMapUrl(Collection<LayerDetails> selectedLayers) {
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[6000] | 181 | return buildGetMapUrl(selectedLayers, "image/jpeg");
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| 182 | }
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| 183 |
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[12475] | 184 | /**
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| 185 | * Returns the URL for the "GetMap" WMS request.
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| 186 | * @param selectedLayers the list of selected layers, matching the "LAYERS" WMS request argument
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| 187 | * @param format the requested image format, matching the "FORMAT" WMS request argument
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| 188 | * @return the URL for the "GetMap" WMS request
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| 189 | */
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[6000] | 190 | public String buildGetMapUrl(Collection<LayerDetails> selectedLayers, String format) {
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[10612] | 191 | return buildRootUrl() + "FORMAT=" + format + (imageFormatHasTransparency(format) ? "&TRANSPARENT=TRUE" : "")
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[7175] | 192 | + "&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS="
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[10638] | 193 | + selectedLayers.stream().map(x -> x.ident).collect(Collectors.joining(","))
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[5617] | 194 | + "&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}";
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| 195 | }
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| 196 |
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[12475] | 197 | /**
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| 198 | * Attempts WMS "GetCapabilities" request and initializes internal variables if successful.
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| 199 | * @param serviceUrlStr WMS service URL
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| 200 | * @throws IOException if any I/O errors occurs
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| 201 | * @throws WMSGetCapabilitiesException if the WMS server replies a ServiceException
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| 202 | */
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[10612] | 203 | public void attemptGetCapabilities(String serviceUrlStr) throws IOException, WMSGetCapabilitiesException {
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[5617] | 204 | URL getCapabilitiesUrl = null;
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| 205 | try {
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| 206 | if (!Pattern.compile(".*GetCapabilities.*", Pattern.CASE_INSENSITIVE).matcher(serviceUrlStr).matches()) {
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| 207 | // If the url doesn't already have GetCapabilities, add it in
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| 208 | getCapabilitiesUrl = new URL(serviceUrlStr);
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| 209 | final String getCapabilitiesQuery = "VERSION=1.1.1&SERVICE=WMS&REQUEST=GetCapabilities";
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| 210 | if (getCapabilitiesUrl.getQuery() == null) {
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[8846] | 211 | getCapabilitiesUrl = new URL(serviceUrlStr + '?' + getCapabilitiesQuery);
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[5617] | 212 | } else if (!getCapabilitiesUrl.getQuery().isEmpty() && !getCapabilitiesUrl.getQuery().endsWith("&")) {
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[8846] | 213 | getCapabilitiesUrl = new URL(serviceUrlStr + '&' + getCapabilitiesQuery);
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[5617] | 214 | } else {
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| 215 | getCapabilitiesUrl = new URL(serviceUrlStr + getCapabilitiesQuery);
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| 216 | }
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| 217 | } else {
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| 218 | // Otherwise assume it's a good URL and let the subsequent error
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| 219 | // handling systems deal with problems
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| 220 | getCapabilitiesUrl = new URL(serviceUrlStr);
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| 221 | }
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| 222 | serviceUrl = new URL(serviceUrlStr);
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| 223 | } catch (HeadlessException e) {
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[10612] | 224 | Main.warn(e);
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[5617] | 225 | return;
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| 226 | }
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| 227 |
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[9171] | 228 | final String incomingData = HttpClient.create(getCapabilitiesUrl).connect().fetchContent();
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[7175] | 229 | Main.debug("Server response to Capabilities request:");
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| 230 | Main.debug(incomingData);
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[5617] | 231 |
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| 232 | try {
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[10404] | 233 | DocumentBuilder builder = Utils.newSafeDOMBuilder();
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[10615] | 234 | builder.setEntityResolver((publicId, systemId) -> {
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| 235 | Main.info("Ignoring DTD " + publicId + ", " + systemId);
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| 236 | return new InputSource(new StringReader(""));
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[5617] | 237 | });
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[10212] | 238 | Document document = builder.parse(new InputSource(new StringReader(incomingData)));
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[10520] | 239 | Element root = document.getDocumentElement();
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[5617] | 240 |
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[10520] | 241 | // Check if the request resulted in ServiceException
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| 242 | if ("ServiceException".equals(root.getTagName())) {
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| 243 | throw new WMSGetCapabilitiesException(root.getTextContent(), incomingData);
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| 244 | }
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| 245 |
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[5617] | 246 | // Some WMS service URLs specify a different base URL for their GetMap service
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[10520] | 247 | Element child = getChild(root, "Capability");
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[5617] | 248 | child = getChild(child, "Request");
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| 249 | child = getChild(child, "GetMap");
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[6000] | 250 |
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[10612] | 251 | formats = getChildrenStream(child, "Format")
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[10717] | 252 | .map(Node::getTextContent)
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[10612] | 253 | .filter(WMSImagery::isImageFormatSupportedWarn)
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| 254 | .collect(Collectors.toList());
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[6000] | 255 |
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[5617] | 256 | child = getChild(child, "DCPType");
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| 257 | child = getChild(child, "HTTP");
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| 258 | child = getChild(child, "Get");
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| 259 | child = getChild(child, "OnlineResource");
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| 260 | if (child != null) {
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| 261 | String baseURL = child.getAttribute("xlink:href");
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[11381] | 262 | if (!baseURL.equals(serviceUrlStr)) {
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[6248] | 263 | Main.info("GetCapabilities specifies a different service URL: " + baseURL);
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[5617] | 264 | serviceUrl = new URL(baseURL);
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| 265 | }
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| 266 | }
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| 267 |
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[10520] | 268 | Element capabilityElem = getChild(root, "Capability");
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[5617] | 269 | List<Element> children = getChildren(capabilityElem, "Layer");
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| 270 | layers = parseLayers(children, new HashSet<String>());
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[10212] | 271 | } catch (MalformedURLException | ParserConfigurationException | SAXException e) {
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[5617] | 272 | throw new WMSGetCapabilitiesException(e, incomingData);
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| 273 | }
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| 274 | }
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| 275 |
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[10612] | 276 | private static boolean isImageFormatSupportedWarn(String format) {
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| 277 | boolean isFormatSupported = isImageFormatSupported(format);
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| 278 | if (!isFormatSupported) {
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| 279 | Main.info("Skipping unsupported image format {0}", format);
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| 280 | }
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| 281 | return isFormatSupported;
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| 282 | }
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| 283 |
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[6930] | 284 | static boolean isImageFormatSupported(final String format) {
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| 285 | return ImageIO.getImageReadersByMIMEType(format).hasNext()
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[8509] | 286 | // handles image/tiff image/tiff8 image/geotiff image/geotiff8
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[11587] | 287 | || isImageFormatSupported(format, "tiff", "geotiff")
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| 288 | || isImageFormatSupported(format, "png")
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| 289 | || isImageFormatSupported(format, "svg")
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| 290 | || isImageFormatSupported(format, "bmp");
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[6930] | 291 | }
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[7221] | 292 |
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[11747] | 293 | static boolean isImageFormatSupported(String format, String... mimeFormats) {
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[11587] | 294 | for (String mime : mimeFormats) {
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| 295 | if (format.startsWith("image/" + mime)) {
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| 296 | return ImageIO.getImageReadersBySuffix(mimeFormats[0]).hasNext();
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| 297 | }
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| 298 | }
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| 299 | return false;
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| 300 | }
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| 301 |
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[7175] | 302 | static boolean imageFormatHasTransparency(final String format) {
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[7221] | 303 | return format != null && (format.startsWith("image/png") || format.startsWith("image/gif")
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| 304 | || format.startsWith("image/svg") || format.startsWith("image/tiff"));
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[7175] | 305 | }
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[6930] | 306 |
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[12475] | 307 | /**
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| 308 | * Returns a new {@code ImageryInfo} describing the given service name and selected WMS layers.
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| 309 | * @param name service name
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| 310 | * @param selectedLayers selected WMS layers
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| 311 | * @return a new {@code ImageryInfo} describing the given service name and selected WMS layers
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| 312 | */
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[5617] | 313 | public ImageryInfo toImageryInfo(String name, Collection<LayerDetails> selectedLayers) {
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| 314 | ImageryInfo i = new ImageryInfo(name, buildGetMapUrl(selectedLayers));
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| 315 | if (selectedLayers != null) {
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[8338] | 316 | Set<String> proj = new HashSet<>();
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[5617] | 317 | for (WMSImagery.LayerDetails l : selectedLayers) {
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| 318 | proj.addAll(l.getProjections());
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| 319 | }
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| 320 | i.setServerProjections(proj);
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| 321 | }
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| 322 | return i;
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| 323 | }
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| 324 |
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| 325 | private List<LayerDetails> parseLayers(List<Element> children, Set<String> parentCrs) {
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[7005] | 326 | List<LayerDetails> details = new ArrayList<>(children.size());
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[5617] | 327 | for (Element element : children) {
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| 328 | details.add(parseLayer(element, parentCrs));
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| 329 | }
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| 330 | return details;
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| 331 | }
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| 332 |
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| 333 | private LayerDetails parseLayer(Element element, Set<String> parentCrs) {
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| 334 | String name = getChildContent(element, "Title", null, null);
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| 335 | String ident = getChildContent(element, "Name", null, null);
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| 336 |
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| 337 | // The set of supported CRS/SRS for this layer
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[7005] | 338 | Set<String> crsList = new HashSet<>();
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[5617] | 339 | // ...including this layer's already-parsed parent projections
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| 340 | crsList.addAll(parentCrs);
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| 341 |
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| 342 | // Parse the CRS/SRS pulled out of this layer's XML element
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| 343 | // I think CRS and SRS are the same at this point
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[10612] | 344 | getChildrenStream(element)
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| 345 | .filter(child -> "CRS".equals(child.getNodeName()) || "SRS".equals(child.getNodeName()))
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| 346 | .map(child -> (String) getContent(child))
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| 347 | .filter(crs -> !crs.isEmpty())
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| 348 | .map(crs -> crs.trim().toUpperCase(Locale.ENGLISH))
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| 349 | .forEach(crsList::add);
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[5617] | 350 |
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| 351 | // Check to see if any of the specified projections are supported by JOSM
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| 352 | boolean josmSupportsThisLayer = false;
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| 353 | for (String crs : crsList) {
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| 354 | josmSupportsThisLayer |= isProjSupported(crs);
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| 355 | }
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| 356 |
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| 357 | Bounds bounds = null;
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| 358 | Element bboxElem = getChild(element, "EX_GeographicBoundingBox");
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| 359 | if (bboxElem != null) {
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| 360 | // Attempt to use EX_GeographicBoundingBox for bounding box
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| 361 | double left = Double.parseDouble(getChildContent(bboxElem, "westBoundLongitude", null, null));
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| 362 | double top = Double.parseDouble(getChildContent(bboxElem, "northBoundLatitude", null, null));
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| 363 | double right = Double.parseDouble(getChildContent(bboxElem, "eastBoundLongitude", null, null));
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| 364 | double bot = Double.parseDouble(getChildContent(bboxElem, "southBoundLatitude", null, null));
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| 365 | bounds = new Bounds(bot, left, top, right);
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| 366 | } else {
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| 367 | // If that's not available, try LatLonBoundingBox
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| 368 | bboxElem = getChild(element, "LatLonBoundingBox");
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| 369 | if (bboxElem != null) {
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[12475] | 370 | double left = getDecimalDegree(bboxElem, "minx");
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[12469] | 371 | double top = getDecimalDegree(bboxElem, "maxy");
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| 372 | double right = getDecimalDegree(bboxElem, "maxx");
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| 373 | double bot = getDecimalDegree(bboxElem, "miny");
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[5617] | 374 | bounds = new Bounds(bot, left, top, right);
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| 375 | }
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| 376 | }
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| 377 |
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| 378 | List<Element> layerChildren = getChildren(element, "Layer");
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| 379 | List<LayerDetails> childLayers = parseLayers(layerChildren, crsList);
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| 380 |
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| 381 | return new LayerDetails(name, ident, crsList, josmSupportsThisLayer, bounds, childLayers);
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| 382 | }
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| 383 |
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[12469] | 384 | private static double getDecimalDegree(Element elem, String attr) {
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| 385 | // Some real-world WMS servers use a comma instead of a dot as decimal separator (seen in Polish WMS server)
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| 386 | return Double.parseDouble(elem.getAttribute(attr).replace(',', '.'));
|
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| 387 | }
|
---|
| 388 |
|
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[8870] | 389 | private static boolean isProjSupported(String crs) {
|
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[9107] | 390 | return Projections.getProjectionByCode(crs) != null;
|
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[5617] | 391 | }
|
---|
| 392 |
|
---|
| 393 | private static String getChildContent(Element parent, String name, String missing, String empty) {
|
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| 394 | Element child = getChild(parent, name);
|
---|
| 395 | if (child == null)
|
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| 396 | return missing;
|
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| 397 | else {
|
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| 398 | String content = (String) getContent(child);
|
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[6289] | 399 | return (!content.isEmpty()) ? content : empty;
|
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[5617] | 400 | }
|
---|
| 401 | }
|
---|
| 402 |
|
---|
| 403 | private static Object getContent(Element element) {
|
---|
| 404 | NodeList nl = element.getChildNodes();
|
---|
| 405 | StringBuilder content = new StringBuilder();
|
---|
| 406 | for (int i = 0; i < nl.getLength(); i++) {
|
---|
| 407 | Node node = nl.item(i);
|
---|
| 408 | switch (node.getNodeType()) {
|
---|
| 409 | case Node.ELEMENT_NODE:
|
---|
| 410 | return node;
|
---|
| 411 | case Node.CDATA_SECTION_NODE:
|
---|
| 412 | case Node.TEXT_NODE:
|
---|
| 413 | content.append(node.getNodeValue());
|
---|
| 414 | break;
|
---|
[10216] | 415 | default: // Do nothing
|
---|
[5617] | 416 | }
|
---|
| 417 | }
|
---|
| 418 | return content.toString().trim();
|
---|
| 419 | }
|
---|
| 420 |
|
---|
[10612] | 421 | private static Stream<Element> getChildrenStream(Element parent) {
|
---|
| 422 | if (parent == null) {
|
---|
| 423 | // ignore missing elements
|
---|
| 424 | return Stream.empty();
|
---|
| 425 | } else {
|
---|
| 426 | Iterable<Element> it = () -> new ChildIterator(parent);
|
---|
| 427 | return StreamSupport.stream(it.spliterator(), false);
|
---|
[5617] | 428 | }
|
---|
| 429 | }
|
---|
| 430 |
|
---|
[10612] | 431 | private static Stream<Element> getChildrenStream(Element parent, String name) {
|
---|
| 432 | return getChildrenStream(parent).filter(child -> name.equals(child.getNodeName()));
|
---|
| 433 | }
|
---|
| 434 |
|
---|
| 435 | private static List<Element> getChildren(Element parent, String name) {
|
---|
| 436 | return getChildrenStream(parent, name).collect(Collectors.toList());
|
---|
| 437 | }
|
---|
| 438 |
|
---|
[5617] | 439 | private static Element getChild(Element parent, String name) {
|
---|
[10612] | 440 | return getChildrenStream(parent, name).findFirst().orElse(null);
|
---|
[5617] | 441 | }
|
---|
| 442 |
|
---|
[10612] | 443 | /**
|
---|
| 444 | * The details of a layer of this wms server.
|
---|
| 445 | */
|
---|
[5617] | 446 | public static class LayerDetails {
|
---|
| 447 |
|
---|
[10612] | 448 | /**
|
---|
| 449 | * The layer name
|
---|
| 450 | */
|
---|
[5617] | 451 | public final String name;
|
---|
| 452 | public final String ident;
|
---|
[10612] | 453 | /**
|
---|
| 454 | * The child layers of this layer
|
---|
| 455 | */
|
---|
[5617] | 456 | public final List<LayerDetails> children;
|
---|
[10612] | 457 | /**
|
---|
| 458 | * The bounds this layer can be used for
|
---|
| 459 | */
|
---|
[5617] | 460 | public final Bounds bounds;
|
---|
| 461 | public final Set<String> crsList;
|
---|
| 462 | public final boolean supported;
|
---|
| 463 |
|
---|
[10612] | 464 | public LayerDetails(String name, String ident, Set<String> crsList, boolean supportedLayer, Bounds bounds,
|
---|
| 465 | List<LayerDetails> childLayers) {
|
---|
[5617] | 466 | this.name = name;
|
---|
| 467 | this.ident = ident;
|
---|
| 468 | this.supported = supportedLayer;
|
---|
| 469 | this.children = childLayers;
|
---|
| 470 | this.bounds = bounds;
|
---|
| 471 | this.crsList = crsList;
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | public boolean isSupported() {
|
---|
| 475 | return this.supported;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 | public Set<String> getProjections() {
|
---|
| 479 | return crsList;
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 | @Override
|
---|
| 483 | public String toString() {
|
---|
| 484 | if (this.name == null || this.name.isEmpty())
|
---|
| 485 | return this.ident;
|
---|
| 486 | else
|
---|
| 487 | return this.name;
|
---|
| 488 | }
|
---|
| 489 | }
|
---|
| 490 | }
|
---|