[6380] | 1 | // License: GPL. For details, see LICENSE file.
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[906] | 2 | package org.openstreetmap.josm.io;
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| 3 |
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[2832] | 4 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 5 |
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[9411] | 6 | import java.io.BufferedReader;
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[9995] | 7 | import java.io.ByteArrayOutputStream;
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[9411] | 8 | import java.io.Closeable;
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[906] | 9 | import java.io.File;
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| 10 | import java.io.FileInputStream;
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[2017] | 11 | import java.io.IOException;
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[906] | 12 | import java.io.InputStream;
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[4262] | 13 | import java.net.HttpURLConnection;
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| 14 | import java.net.MalformedURLException;
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[906] | 15 | import java.net.URL;
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[7089] | 16 | import java.nio.charset.StandardCharsets;
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[9280] | 17 | import java.nio.file.Files;
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| 18 | import java.nio.file.StandardCopyOption;
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[4612] | 19 | import java.util.ArrayList;
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[4022] | 20 | import java.util.Arrays;
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[2889] | 21 | import java.util.Enumeration;
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[4612] | 22 | import java.util.List;
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[8568] | 23 | import java.util.Map;
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| 24 | import java.util.concurrent.ConcurrentHashMap;
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[11288] | 25 | import java.util.concurrent.TimeUnit;
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[2889] | 26 | import java.util.zip.ZipEntry;
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| 27 | import java.util.zip.ZipFile;
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[906] | 28 |
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| 29 | import org.openstreetmap.josm.Main;
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[9168] | 30 | import org.openstreetmap.josm.tools.HttpClient;
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[12620] | 31 | import org.openstreetmap.josm.tools.Logging;
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[6148] | 32 | import org.openstreetmap.josm.tools.Pair;
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[4812] | 33 | import org.openstreetmap.josm.tools.Utils;
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[906] | 34 |
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| 35 | /**
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[7248] | 36 | * Downloads a file and caches it on disk in order to reduce network load.
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[7434] | 37 | *
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[7248] | 38 | * Supports URLs, local files, and a custom scheme (<code>resource:</code>) to get
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| 39 | * resources from the current *.jar file. (Local caching is only done for URLs.)
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[906] | 40 | * <p>
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[7248] | 41 | * The mirrored file is only downloaded if it has been more than 7 days since
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| 42 | * last download. (Time can be configured.)
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| 43 | * <p>
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| 44 | * The file content is normally accessed with {@link #getInputStream()}, but
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| 45 | * you can also get the mirrored copy with {@link #getFile()}.
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[906] | 46 | */
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[9411] | 47 | public class CachedFile implements Closeable {
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[7248] | 48 |
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[7242] | 49 | /**
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| 50 | * Caching strategy.
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| 51 | */
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| 52 | public enum CachingStrategy {
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| 53 | /**
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| 54 | * If cached file on disk is older than a certain time (7 days by default),
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| 55 | * consider the cache stale and try to download the file again.
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| 56 | */
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[7434] | 57 | MaxAge,
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[7242] | 58 | /**
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| 59 | * Similar to MaxAge, considers the cache stale when a certain age is
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| 60 | * exceeded. In addition, a If-Modified-Since HTTP header is added.
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| 61 | * When the server replies "304 Not Modified", this is considered the same
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| 62 | * as a full download.
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| 63 | */
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[7434] | 64 | IfModifiedSince
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[7242] | 65 | }
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[8510] | 66 |
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[7248] | 67 | protected String name;
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| 68 | protected long maxAge;
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| 69 | protected String destDir;
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| 70 | protected String httpAccept;
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| 71 | protected CachingStrategy cachingStrategy;
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[7434] | 72 |
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[9977] | 73 | private boolean fastFail;
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| 74 | private HttpClient activeConnection;
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[8840] | 75 | protected File cacheFile;
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| 76 | protected boolean initialized;
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[4262] | 77 |
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[6889] | 78 | public static final long DEFAULT_MAXTIME = -1L;
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[11288] | 79 | public static final long DAYS = TimeUnit.DAYS.toSeconds(1); // factor to get caching time in days
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[906] | 80 |
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[9078] | 81 | private final Map<String, String> httpHeaders = new ConcurrentHashMap<>();
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[8568] | 82 |
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[6867] | 83 | /**
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[7248] | 84 | * Constructs a CachedFile object from a given filename, URL or internal resource.
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[7089] | 85 | *
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[6867] | 86 | * @param name can be:<ul>
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| 87 | * <li>relative or absolute file name</li>
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| 88 | * <li>{@code file:///SOME/FILE} the same as above</li>
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[8401] | 89 | * <li>{@code http://...} a URL. It will be cached on disk.</li>
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[6867] | 90 | * <li>{@code resource://SOME/FILE} file from the classpath (usually in the current *.jar)</li>
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[8401] | 91 | * <li>{@code josmdir://SOME/FILE} file inside josm user data directory (since r7058)</li>
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[7835] | 92 | * <li>{@code josmplugindir://SOME/FILE} file inside josm plugin directory (since r7834)</li></ul>
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[6867] | 93 | */
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[7248] | 94 | public CachedFile(String name) {
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| 95 | this.name = name;
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[1169] | 96 | }
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[906] | 97 |
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[6867] | 98 | /**
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[7248] | 99 | * Set the name of the resource.
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[6867] | 100 | * @param name can be:<ul>
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| 101 | * <li>relative or absolute file name</li>
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| 102 | * <li>{@code file:///SOME/FILE} the same as above</li>
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[8401] | 103 | * <li>{@code http://...} a URL. It will be cached on disk.</li>
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[6867] | 104 | * <li>{@code resource://SOME/FILE} file from the classpath (usually in the current *.jar)</li>
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[8401] | 105 | * <li>{@code josmdir://SOME/FILE} file inside josm user data directory (since r7058)</li>
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[7835] | 106 | * <li>{@code josmplugindir://SOME/FILE} file inside josm plugin directory (since r7834)</li></ul>
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[7248] | 107 | * @return this object
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[6867] | 108 | */
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[7248] | 109 | public CachedFile setName(String name) {
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| 110 | this.name = name;
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| 111 | return this;
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[1169] | 112 | }
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[7434] | 113 |
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[7248] | 114 | /**
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| 115 | * Set maximum age of cache file. Only applies to URLs.
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| 116 | * When this time has passed after the last download of the file, the
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| 117 | * cache is considered stale and a new download will be attempted.
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| 118 | * @param maxAge the maximum cache age in seconds
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| 119 | * @return this object
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| 120 | */
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| 121 | public CachedFile setMaxAge(long maxAge) {
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| 122 | this.maxAge = maxAge;
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| 123 | return this;
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| 124 | }
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[906] | 125 |
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[6867] | 126 | /**
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[7248] | 127 | * Set the destination directory for the cache file. Only applies to URLs.
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| 128 | * @param destDir the destination directory
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| 129 | * @return this object
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[6867] | 130 | */
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[7248] | 131 | public CachedFile setDestDir(String destDir) {
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| 132 | this.destDir = destDir;
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| 133 | return this;
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[1711] | 134 | }
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| 135 |
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[3695] | 136 | /**
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[7248] | 137 | * Set the accepted MIME types sent in the HTTP Accept header. Only applies to URLs.
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| 138 | * @param httpAccept the accepted MIME types
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| 139 | * @return this object
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[3695] | 140 | */
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[7248] | 141 | public CachedFile setHttpAccept(String httpAccept) {
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| 142 | this.httpAccept = httpAccept;
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| 143 | return this;
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[6867] | 144 | }
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| 145 |
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| 146 | /**
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[7248] | 147 | * Set the caching strategy. Only applies to URLs.
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[8470] | 148 | * @param cachingStrategy caching strategy
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[7248] | 149 | * @return this object
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[6867] | 150 | */
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[7248] | 151 | public CachedFile setCachingStrategy(CachingStrategy cachingStrategy) {
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| 152 | this.cachingStrategy = cachingStrategy;
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| 153 | return this;
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[6867] | 154 | }
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| 155 |
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[8568] | 156 | /**
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| 157 | * Sets the http headers. Only applies to URL pointing to http or https resources
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| 158 | * @param headers that should be sent together with request
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| 159 | * @return this object
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| 160 | */
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| 161 | public CachedFile setHttpHeaders(Map<String, String> headers) {
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| 162 | this.httpHeaders.putAll(headers);
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| 163 | return this;
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| 164 | }
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| 165 |
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[9414] | 166 | /**
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| 167 | * Sets whether opening HTTP connections should fail fast, i.e., whether a
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| 168 | * {@link HttpClient#setConnectTimeout(int) low connect timeout} should be used.
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| 169 | * @param fastFail whether opening HTTP connections should fail fast
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| 170 | */
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| 171 | public void setFastFail(boolean fastFail) {
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| 172 | this.fastFail = fastFail;
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| 173 | }
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| 174 |
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[7248] | 175 | public String getName() {
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| 176 | return name;
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| 177 | }
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| 178 |
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[10194] | 179 | /**
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| 180 | * Returns maximum age of cache file. Only applies to URLs.
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| 181 | * When this time has passed after the last download of the file, the
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| 182 | * cache is considered stale and a new download will be attempted.
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| 183 | * @return the maximum cache age in seconds
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| 184 | */
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[7248] | 185 | public long getMaxAge() {
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| 186 | return maxAge;
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| 187 | }
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| 188 |
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| 189 | public String getDestDir() {
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| 190 | return destDir;
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| 191 | }
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| 192 |
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| 193 | public String getHttpAccept() {
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| 194 | return httpAccept;
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| 195 | }
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| 196 |
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| 197 | public CachingStrategy getCachingStrategy() {
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| 198 | return cachingStrategy;
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| 199 | }
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| 200 |
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[6867] | 201 | /**
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[7248] | 202 | * Get InputStream to the requested resource.
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| 203 | * @return the InputStream
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[6867] | 204 | * @throws IOException when the resource with the given name could not be retrieved
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| 205 | */
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[7248] | 206 | public InputStream getInputStream() throws IOException {
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| 207 | File file = getFile();
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| 208 | if (file == null) {
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[11493] | 209 | if (name != null && name.startsWith("resource://")) {
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[7248] | 210 | InputStream is = getClass().getResourceAsStream(
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| 211 | name.substring("resource:/".length()));
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| 212 | if (is == null)
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| 213 | throw new IOException(tr("Failed to open input stream for resource ''{0}''", name));
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| 214 | return is;
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[7853] | 215 | } else {
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[7890] | 216 | throw new IOException("No file found for: "+name);
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[7853] | 217 | }
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[7248] | 218 | }
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| 219 | return new FileInputStream(file);
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[7242] | 220 | }
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| 221 |
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| 222 | /**
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[9995] | 223 | * Get the full content of the requested resource as a byte array.
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| 224 | * @return the full content of the requested resource as byte array
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| 225 | * @throws IOException in case of an I/O error
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| 226 | */
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| 227 | public byte[] getByteContent() throws IOException {
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| 228 | try (InputStream is = getInputStream()) {
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| 229 | ByteArrayOutputStream buffer = new ByteArrayOutputStream();
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| 230 | int nRead;
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| 231 | byte[] data = new byte[8192];
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| 232 | while ((nRead = is.read(data, 0, data.length)) != -1) {
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| 233 | buffer.write(data, 0, nRead);
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| 234 | }
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| 235 | buffer.flush();
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| 236 | return buffer.toByteArray();
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| 237 | }
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| 238 | }
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| 239 |
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| 240 | /**
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[9411] | 241 | * Returns {@link #getInputStream()} wrapped in a buffered reader.
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[9545] | 242 | * <p>
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[9411] | 243 | * Detects Unicode charset in use utilizing {@link UTFInputStreamReader}.
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| 244 | *
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| 245 | * @return buffered reader
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| 246 | * @throws IOException if any I/O error occurs
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| 247 | * @since 9411
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| 248 | */
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| 249 | public BufferedReader getContentReader() throws IOException {
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| 250 | return new BufferedReader(UTFInputStreamReader.create(getInputStream()));
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| 251 | }
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| 252 |
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| 253 | /**
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[7248] | 254 | * Get local file for the requested resource.
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| 255 | * @return The local cache file for URLs. If the resource is a local file,
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| 256 | * returns just that file.
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[7242] | 257 | * @throws IOException when the resource with the given name could not be retrieved
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| 258 | */
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[7853] | 259 | public synchronized File getFile() throws IOException {
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[7248] | 260 | if (initialized)
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| 261 | return cacheFile;
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| 262 | initialized = true;
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[1169] | 263 | URL url;
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[1523] | 264 | try {
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[1169] | 265 | url = new URL(name);
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[7012] | 266 | if ("file".equals(url.getProtocol())) {
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[8596] | 267 | cacheFile = new File(name.substring("file:/".length() - 1));
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[7248] | 268 | if (!cacheFile.exists()) {
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[8596] | 269 | cacheFile = new File(name.substring("file://".length() - 1));
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[2832] | 270 | }
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[1523] | 271 | } else {
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[7248] | 272 | cacheFile = checkLocal(url);
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[1169] | 273 | }
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[7434] | 274 | } catch (MalformedURLException e) {
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[11493] | 275 | if (name == null || name.startsWith("resource://")) {
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[7248] | 276 | return null;
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[7058] | 277 | } else if (name.startsWith("josmdir://")) {
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[7834] | 278 | cacheFile = new File(Main.pref.getUserDataDirectory(), name.substring("josmdir://".length()));
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| 279 | } else if (name.startsWith("josmplugindir://")) {
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| 280 | cacheFile = new File(Main.pref.getPluginsDirectory(), name.substring("josmplugindir://".length()));
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[7058] | 281 | } else {
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[7248] | 282 | cacheFile = new File(name);
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[1169] | 283 | }
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| 284 | }
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[7248] | 285 | if (cacheFile == null)
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[7434] | 286 | throw new IOException("Unable to get cache file for "+name);
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[7248] | 287 | return cacheFile;
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[1169] | 288 | }
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[7434] | 289 |
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[3007] | 290 | /**
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[6148] | 291 | * Looks for a certain entry inside a zip file and returns the entry path.
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| 292 | *
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| 293 | * Replies a file in the top level directory of the ZIP file which has an
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| 294 | * extension <code>extension</code>. If more than one files have this
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| 295 | * extension, the last file whose name includes <code>namepart</code>
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[3007] | 296 | * is opened.
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[3321] | 297 | *
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[3007] | 298 | * @param extension the extension of the file we're looking for
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| 299 | * @param namepart the name part
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[7248] | 300 | * @return The zip entry path of the matching file. Null if this cached file
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| 301 | * doesn't represent a zip file or if there was no matching
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[6148] | 302 | * file in the ZIP file.
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[3007] | 303 | */
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[6148] | 304 | public String findZipEntryPath(String extension, String namepart) {
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| 305 | Pair<String, InputStream> ze = findZipEntryImpl(extension, namepart);
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| 306 | if (ze == null) return null;
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| 307 | return ze.a;
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| 308 | }
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| 309 |
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| 310 | /**
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| 311 | * Like {@link #findZipEntryPath}, but returns the corresponding InputStream.
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[7248] | 312 | * @param extension the extension of the file we're looking for
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| 313 | * @param namepart the name part
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| 314 | * @return InputStream to the matching file. Null if this cached file
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| 315 | * doesn't represent a zip file or if there was no matching
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| 316 | * file in the ZIP file.
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[6985] | 317 | * @since 6148
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[6148] | 318 | */
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| 319 | public InputStream findZipEntryInputStream(String extension, String namepart) {
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| 320 | Pair<String, InputStream> ze = findZipEntryImpl(extension, namepart);
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| 321 | if (ze == null) return null;
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| 322 | return ze.b;
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| 323 | }
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| 324 |
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| 325 | private Pair<String, InputStream> findZipEntryImpl(String extension, String namepart) {
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[7248] | 326 | File file = null;
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| 327 | try {
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| 328 | file = getFile();
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| 329 | } catch (IOException ex) {
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[12620] | 330 | Logging.log(Logging.LEVEL_WARN, ex);
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[7248] | 331 | }
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[3011] | 332 | if (file == null)
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| 333 | return null;
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[6148] | 334 | Pair<String, InputStream> res = null;
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[2889] | 335 | try {
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[7089] | 336 | ZipFile zipFile = new ZipFile(file, StandardCharsets.UTF_8);
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[3007] | 337 | ZipEntry resentry = null;
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| 338 | Enumeration<? extends ZipEntry> entries = zipFile.entries();
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| 339 | while (entries.hasMoreElements()) {
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| 340 | ZipEntry entry = entries.nextElement();
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[11386] | 341 | // choose any file with correct extension. When more than one file, prefer the one which matches namepart
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| 342 | if (entry.getName().endsWith('.' + extension) && (resentry == null || entry.getName().indexOf(namepart) >= 0)) {
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| 343 | resentry = entry;
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[2889] | 344 | }
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| 345 | }
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[3007] | 346 | if (resentry != null) {
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[6148] | 347 | InputStream is = zipFile.getInputStream(resentry);
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| 348 | res = Pair.create(resentry.getName(), is);
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[3007] | 349 | } else {
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[5874] | 350 | Utils.close(zipFile);
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[3007] | 351 | }
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[10212] | 352 | } catch (IOException e) {
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[6248] | 353 | if (file.getName().endsWith(".zip")) {
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[12620] | 354 | Logging.log(Logging.LEVEL_WARN,
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| 355 | tr("Failed to open file with extension ''{2}'' and namepart ''{3}'' in zip file ''{0}''. Exception was: {1}",
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| 356 | file.getName(), e.toString(), extension, namepart), e);
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[3041] | 357 | }
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[2889] | 358 | }
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| 359 | return res;
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| 360 | }
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| 361 |
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[7081] | 362 | /**
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[7248] | 363 | * Clear the cache for the given resource.
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| 364 | * This forces a fresh download.
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[7434] | 365 | * @param name the URL
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[7081] | 366 | */
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[6310] | 367 | public static void cleanup(String name) {
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[2832] | 368 | cleanup(name, null);
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[1747] | 369 | }
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[7089] | 370 |
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[7248] | 371 | /**
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| 372 | * Clear the cache for the given resource.
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| 373 | * This forces a fresh download.
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| 374 | * @param name the URL
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| 375 | * @param destDir the destination directory (see {@link #setDestDir(java.lang.String)})
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| 376 | */
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[6310] | 377 | public static void cleanup(String name, String destDir) {
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[1747] | 378 | URL url;
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| 379 | try {
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| 380 | url = new URL(name);
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[7012] | 381 | if (!"file".equals(url.getProtocol())) {
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[3695] | 382 | String prefKey = getPrefKey(url, destDir);
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[7005] | 383 | List<String> localPath = new ArrayList<>(Main.pref.getCollection(prefKey));
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[4638] | 384 | if (localPath.size() == 2) {
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| 385 | File lfile = new File(localPath.get(1));
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[8510] | 386 | if (lfile.exists()) {
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[9296] | 387 | Utils.deleteFile(lfile);
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[2832] | 388 | }
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[1747] | 389 | }
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[4812] | 390 | Main.pref.putCollection(prefKey, null);
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[1747] | 391 | }
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[6310] | 392 | } catch (MalformedURLException e) {
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[12620] | 393 | Logging.warn(e);
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[6310] | 394 | }
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[1747] | 395 | }
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| 396 |
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[3695] | 397 | /**
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[7248] | 398 | * Get preference key to store the location and age of the cached file.
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[3695] | 399 | * 2 resources that point to the same url, but that are to be stored in different
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| 400 | * directories will not share a cache file.
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[8929] | 401 | * @param url URL
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| 402 | * @param destDir destination directory
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| 403 | * @return Preference key
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[3695] | 404 | */
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| 405 | private static String getPrefKey(URL url, String destDir) {
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| 406 | StringBuilder prefKey = new StringBuilder("mirror.");
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| 407 | if (destDir != null) {
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[8390] | 408 | prefKey.append(destDir).append('.');
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[3695] | 409 | }
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| 410 | prefKey.append(url.toString());
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[8510] | 411 | return prefKey.toString().replaceAll("=", "_");
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[3695] | 412 | }
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| 413 |
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[7248] | 414 | private File checkLocal(URL url) throws IOException {
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[3695] | 415 | String prefKey = getPrefKey(url, destDir);
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[7434] | 416 | String urlStr = url.toExternalForm();
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[4128] | 417 | long age = 0L;
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[11288] | 418 | long maxAgeMillis = maxAge;
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[7242] | 419 | Long ifModifiedSince = null;
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[4262] | 420 | File localFile = null;
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[7005] | 421 | List<String> localPathEntry = new ArrayList<>(Main.pref.getCollection(prefKey));
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[7434] | 422 | boolean offline = false;
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| 423 | try {
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| 424 | checkOfflineAccess(urlStr);
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| 425 | } catch (OfflineAccessException e) {
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[12620] | 426 | Logging.trace(e);
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[7434] | 427 | offline = true;
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| 428 | }
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[4612] | 429 | if (localPathEntry.size() == 2) {
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| 430 | localFile = new File(localPathEntry.get(1));
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[7434] | 431 | if (!localFile.exists()) {
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[4262] | 432 | localFile = null;
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[7434] | 433 | } else {
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[8443] | 434 | if (maxAge == DEFAULT_MAXTIME
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[7248] | 435 | || maxAge <= 0 // arbitrary value <= 0 is deprecated
|
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[4240] | 436 | ) {
|
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[11288] | 437 | maxAgeMillis = TimeUnit.SECONDS.toMillis(Main.pref.getLong("mirror.maxtime", TimeUnit.DAYS.toSeconds(7)));
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[3877] | 438 | }
|
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[4612] | 439 | age = System.currentTimeMillis() - Long.parseLong(localPathEntry.get(0));
|
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[11288] | 440 | if (offline || age < maxAgeMillis) {
|
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[4262] | 441 | return localFile;
|
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[3877] | 442 | }
|
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[7248] | 443 | if (cachingStrategy == CachingStrategy.IfModifiedSince) {
|
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[8390] | 444 | ifModifiedSince = Long.valueOf(localPathEntry.get(0));
|
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[7242] | 445 | }
|
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[1169] | 446 | }
|
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| 447 | }
|
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[4812] | 448 | if (destDir == null) {
|
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| 449 | destDir = Main.pref.getCacheDirectory().getPath();
|
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[2832] | 450 | }
|
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[906] | 451 |
|
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[1169] | 452 | File destDirFile = new File(destDir);
|
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[2832] | 453 | if (!destDirFile.exists()) {
|
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[9645] | 454 | Utils.mkDirs(destDirFile);
|
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[2832] | 455 | }
|
---|
[7434] | 456 |
|
---|
| 457 | // No local file + offline => nothing to do
|
---|
| 458 | if (offline) {
|
---|
| 459 | return null;
|
---|
| 460 | }
|
---|
| 461 |
|
---|
| 462 | String a = urlStr.replaceAll("[^A-Za-z0-9_.-]", "_");
|
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[4022] | 463 | String localPath = "mirror_" + a;
|
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[1169] | 464 | destDirFile = new File(destDir, localPath + ".tmp");
|
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[1523] | 465 | try {
|
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[9411] | 466 | activeConnection = HttpClient.create(url)
|
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[9168] | 467 | .setAccept(httpAccept)
|
---|
| 468 | .setIfModifiedSince(ifModifiedSince == null ? 0L : ifModifiedSince)
|
---|
[9411] | 469 | .setHeaders(httpHeaders);
|
---|
[9414] | 470 | if (fastFail) {
|
---|
| 471 | activeConnection.setReadTimeout(1000);
|
---|
| 472 | }
|
---|
[9411] | 473 | final HttpClient.Response con = activeConnection.connect();
|
---|
[7242] | 474 | if (ifModifiedSince != null && con.getResponseCode() == HttpURLConnection.HTTP_NOT_MODIFIED) {
|
---|
[12620] | 475 | Logging.debug("304 Not Modified ({0})", urlStr);
|
---|
[7434] | 476 | if (localFile == null)
|
---|
| 477 | throw new AssertionError();
|
---|
| 478 | Main.pref.putCollection(prefKey,
|
---|
[7242] | 479 | Arrays.asList(Long.toString(System.currentTimeMillis()), localPathEntry.get(1)));
|
---|
| 480 | return localFile;
|
---|
[10686] | 481 | } else if (con.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND) {
|
---|
| 482 | throw new IOException(tr("The requested URL {0} was not found", urlStr));
|
---|
[7434] | 483 | }
|
---|
[11856] | 484 | try (InputStream is = con.getContent()) {
|
---|
| 485 | Files.copy(is, destDirFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
|
---|
[2832] | 486 | }
|
---|
[9411] | 487 | activeConnection = null;
|
---|
[4262] | 488 | localFile = new File(destDir, localPath);
|
---|
[7434] | 489 | if (Main.platform.rename(destDirFile, localFile)) {
|
---|
| 490 | Main.pref.putCollection(prefKey,
|
---|
[7242] | 491 | Arrays.asList(Long.toString(System.currentTimeMillis()), localFile.toString()));
|
---|
[4145] | 492 | } else {
|
---|
[12620] | 493 | Logging.warn(tr("Failed to rename file {0} to {1}.",
|
---|
[4262] | 494 | destDirFile.getPath(), localFile.getPath()));
|
---|
[4145] | 495 | }
|
---|
[4128] | 496 | } catch (IOException e) {
|
---|
[11288] | 497 | if (age >= maxAgeMillis && age < maxAgeMillis*2) {
|
---|
[12620] | 498 | Logging.warn(tr("Failed to load {0}, use cached file and retry next time: {1}", urlStr, e));
|
---|
[4262] | 499 | return localFile;
|
---|
[4128] | 500 | } else {
|
---|
| 501 | throw e;
|
---|
| 502 | }
|
---|
[1169] | 503 | }
|
---|
[906] | 504 |
|
---|
[4262] | 505 | return localFile;
|
---|
[1169] | 506 | }
|
---|
[4262] | 507 |
|
---|
[7434] | 508 | private static void checkOfflineAccess(String urlString) {
|
---|
| 509 | OnlineResource.JOSM_WEBSITE.checkOfflineAccess(urlString, Main.getJOSMWebsite());
|
---|
[9353] | 510 | OnlineResource.OSM_API.checkOfflineAccess(urlString, OsmApi.getOsmApi().getServerUrl());
|
---|
[7434] | 511 | }
|
---|
| 512 |
|
---|
[9411] | 513 | /**
|
---|
| 514 | * Attempts to disconnect an URL connection.
|
---|
| 515 | * @see HttpClient#disconnect()
|
---|
| 516 | * @since 9411
|
---|
| 517 | */
|
---|
| 518 | @Override
|
---|
| 519 | public void close() {
|
---|
| 520 | if (activeConnection != null) {
|
---|
| 521 | activeConnection.disconnect();
|
---|
| 522 | }
|
---|
| 523 | }
|
---|
[10993] | 524 |
|
---|
| 525 | /**
|
---|
| 526 | * Clears the cached file
|
---|
[11009] | 527 | * @throws IOException if any I/O error occurs
|
---|
[10993] | 528 | * @since 10993
|
---|
| 529 | */
|
---|
| 530 | public void clear() throws IOException {
|
---|
[11195] | 531 | URL url;
|
---|
| 532 | try {
|
---|
| 533 | url = new URL(name);
|
---|
| 534 | if ("file".equals(url.getProtocol())) {
|
---|
| 535 | return; // this is local file - do not delete it
|
---|
| 536 | }
|
---|
| 537 | } catch (MalformedURLException e) {
|
---|
| 538 | return; // if it's not a URL, then it still might be a local file - better not to delete
|
---|
| 539 | }
|
---|
[10993] | 540 | File f = getFile();
|
---|
| 541 | if (f != null && f.exists()) {
|
---|
| 542 | Utils.deleteFile(f);
|
---|
| 543 | }
|
---|
| 544 | }
|
---|
[906] | 545 | }
|
---|