1 | // License: GPL. For details, see LICENSE file.
|
---|
2 | package org.openstreetmap.josm.io;
|
---|
3 |
|
---|
4 | import static org.openstreetmap.josm.tools.I18n.tr;
|
---|
5 |
|
---|
6 | import java.io.BufferedReader;
|
---|
7 | import java.io.ByteArrayOutputStream;
|
---|
8 | import java.io.Closeable;
|
---|
9 | import java.io.File;
|
---|
10 | import java.io.IOException;
|
---|
11 | import java.io.InputStream;
|
---|
12 | import java.net.HttpURLConnection;
|
---|
13 | import java.net.MalformedURLException;
|
---|
14 | import java.net.URL;
|
---|
15 | import java.nio.charset.StandardCharsets;
|
---|
16 | import java.nio.file.Files;
|
---|
17 | import java.nio.file.StandardCopyOption;
|
---|
18 | import java.util.ArrayList;
|
---|
19 | import java.util.Arrays;
|
---|
20 | import java.util.Enumeration;
|
---|
21 | import java.util.List;
|
---|
22 | import java.util.Map;
|
---|
23 | import java.util.concurrent.ConcurrentHashMap;
|
---|
24 | import java.util.concurrent.TimeUnit;
|
---|
25 | import java.util.zip.ZipEntry;
|
---|
26 | import java.util.zip.ZipFile;
|
---|
27 |
|
---|
28 | import org.openstreetmap.josm.Main;
|
---|
29 | import org.openstreetmap.josm.spi.preferences.Config;
|
---|
30 | import org.openstreetmap.josm.tools.HttpClient;
|
---|
31 | import org.openstreetmap.josm.tools.Logging;
|
---|
32 | import org.openstreetmap.josm.tools.Pair;
|
---|
33 | import org.openstreetmap.josm.tools.Utils;
|
---|
34 |
|
---|
35 | /**
|
---|
36 | * Downloads a file and caches it on disk in order to reduce network load.
|
---|
37 | *
|
---|
38 | * Supports URLs, local files, and a custom scheme (<code>resource:</code>) to get
|
---|
39 | * resources from the current *.jar file. (Local caching is only done for URLs.)
|
---|
40 | * <p>
|
---|
41 | * The mirrored file is only downloaded if it has been more than 7 days since
|
---|
42 | * last download. (Time can be configured.)
|
---|
43 | * <p>
|
---|
44 | * The file content is normally accessed with {@link #getInputStream()}, but
|
---|
45 | * you can also get the mirrored copy with {@link #getFile()}.
|
---|
46 | */
|
---|
47 | public class CachedFile implements Closeable {
|
---|
48 |
|
---|
49 | /**
|
---|
50 | * Caching strategy.
|
---|
51 | */
|
---|
52 | public enum CachingStrategy {
|
---|
53 | /**
|
---|
54 | * If cached file on disk is older than a certain time (7 days by default),
|
---|
55 | * consider the cache stale and try to download the file again.
|
---|
56 | */
|
---|
57 | MaxAge,
|
---|
58 | /**
|
---|
59 | * Similar to MaxAge, considers the cache stale when a certain age is
|
---|
60 | * exceeded. In addition, a If-Modified-Since HTTP header is added.
|
---|
61 | * When the server replies "304 Not Modified", this is considered the same
|
---|
62 | * as a full download.
|
---|
63 | */
|
---|
64 | IfModifiedSince
|
---|
65 | }
|
---|
66 |
|
---|
67 | protected String name;
|
---|
68 | protected long maxAge;
|
---|
69 | protected String destDir;
|
---|
70 | protected String httpAccept;
|
---|
71 | protected CachingStrategy cachingStrategy;
|
---|
72 |
|
---|
73 | private boolean fastFail;
|
---|
74 | private HttpClient activeConnection;
|
---|
75 | protected File cacheFile;
|
---|
76 | protected boolean initialized;
|
---|
77 | protected String parameter;
|
---|
78 |
|
---|
79 | public static final long DEFAULT_MAXTIME = -1L;
|
---|
80 | public static final long DAYS = TimeUnit.DAYS.toSeconds(1); // factor to get caching time in days
|
---|
81 |
|
---|
82 | private final Map<String, String> httpHeaders = new ConcurrentHashMap<>();
|
---|
83 |
|
---|
84 | /**
|
---|
85 | * Constructs a CachedFile object from a given filename, URL or internal resource.
|
---|
86 | *
|
---|
87 | * @param name can be:<ul>
|
---|
88 | * <li>relative or absolute file name</li>
|
---|
89 | * <li>{@code file:///SOME/FILE} the same as above</li>
|
---|
90 | * <li>{@code http://...} a URL. It will be cached on disk.</li>
|
---|
91 | * <li>{@code resource://SOME/FILE} file from the classpath (usually in the current *.jar)</li>
|
---|
92 | * <li>{@code josmdir://SOME/FILE} file inside josm user data directory (since r7058)</li>
|
---|
93 | * <li>{@code josmplugindir://SOME/FILE} file inside josm plugin directory (since r7834)</li></ul>
|
---|
94 | */
|
---|
95 | public CachedFile(String name) {
|
---|
96 | this.name = name;
|
---|
97 | }
|
---|
98 |
|
---|
99 | /**
|
---|
100 | * Set the name of the resource.
|
---|
101 | * @param name can be:<ul>
|
---|
102 | * <li>relative or absolute file name</li>
|
---|
103 | * <li>{@code file:///SOME/FILE} the same as above</li>
|
---|
104 | * <li>{@code http://...} a URL. It will be cached on disk.</li>
|
---|
105 | * <li>{@code resource://SOME/FILE} file from the classpath (usually in the current *.jar)</li>
|
---|
106 | * <li>{@code josmdir://SOME/FILE} file inside josm user data directory (since r7058)</li>
|
---|
107 | * <li>{@code josmplugindir://SOME/FILE} file inside josm plugin directory (since r7834)</li></ul>
|
---|
108 | * @return this object
|
---|
109 | */
|
---|
110 | public CachedFile setName(String name) {
|
---|
111 | this.name = name;
|
---|
112 | return this;
|
---|
113 | }
|
---|
114 |
|
---|
115 | /**
|
---|
116 | * Set maximum age of cache file. Only applies to URLs.
|
---|
117 | * When this time has passed after the last download of the file, the
|
---|
118 | * cache is considered stale and a new download will be attempted.
|
---|
119 | * @param maxAge the maximum cache age in seconds
|
---|
120 | * @return this object
|
---|
121 | */
|
---|
122 | public CachedFile setMaxAge(long maxAge) {
|
---|
123 | this.maxAge = maxAge;
|
---|
124 | return this;
|
---|
125 | }
|
---|
126 |
|
---|
127 | /**
|
---|
128 | * Set the destination directory for the cache file. Only applies to URLs.
|
---|
129 | * @param destDir the destination directory
|
---|
130 | * @return this object
|
---|
131 | */
|
---|
132 | public CachedFile setDestDir(String destDir) {
|
---|
133 | this.destDir = destDir;
|
---|
134 | return this;
|
---|
135 | }
|
---|
136 |
|
---|
137 | /**
|
---|
138 | * Set the accepted MIME types sent in the HTTP Accept header. Only applies to URLs.
|
---|
139 | * @param httpAccept the accepted MIME types
|
---|
140 | * @return this object
|
---|
141 | */
|
---|
142 | public CachedFile setHttpAccept(String httpAccept) {
|
---|
143 | this.httpAccept = httpAccept;
|
---|
144 | return this;
|
---|
145 | }
|
---|
146 |
|
---|
147 | /**
|
---|
148 | * Set the caching strategy. Only applies to URLs.
|
---|
149 | * @param cachingStrategy caching strategy
|
---|
150 | * @return this object
|
---|
151 | */
|
---|
152 | public CachedFile setCachingStrategy(CachingStrategy cachingStrategy) {
|
---|
153 | this.cachingStrategy = cachingStrategy;
|
---|
154 | return this;
|
---|
155 | }
|
---|
156 |
|
---|
157 | /**
|
---|
158 | * Sets the http headers. Only applies to URL pointing to http or https resources
|
---|
159 | * @param headers that should be sent together with request
|
---|
160 | * @return this object
|
---|
161 | */
|
---|
162 | public CachedFile setHttpHeaders(Map<String, String> headers) {
|
---|
163 | this.httpHeaders.putAll(headers);
|
---|
164 | return this;
|
---|
165 | }
|
---|
166 |
|
---|
167 | /**
|
---|
168 | * Sets whether opening HTTP connections should fail fast, i.e., whether a
|
---|
169 | * {@link HttpClient#setConnectTimeout(int) low connect timeout} should be used.
|
---|
170 | * @param fastFail whether opening HTTP connections should fail fast
|
---|
171 | */
|
---|
172 | public void setFastFail(boolean fastFail) {
|
---|
173 | this.fastFail = fastFail;
|
---|
174 | }
|
---|
175 |
|
---|
176 | /**
|
---|
177 | * Sets additional URL parameter (used e.g. for maps)
|
---|
178 | * @param parameter the URL parameter
|
---|
179 | * @since 13536
|
---|
180 | */
|
---|
181 | public void setParam(String parameter) {
|
---|
182 | this.parameter = parameter;
|
---|
183 | }
|
---|
184 |
|
---|
185 | public String getName() {
|
---|
186 | if(parameter != null)
|
---|
187 | return name.replaceAll("%<(.*)>", "");
|
---|
188 | return name;
|
---|
189 | }
|
---|
190 |
|
---|
191 | /**
|
---|
192 | * Returns maximum age of cache file. Only applies to URLs.
|
---|
193 | * When this time has passed after the last download of the file, the
|
---|
194 | * cache is considered stale and a new download will be attempted.
|
---|
195 | * @return the maximum cache age in seconds
|
---|
196 | */
|
---|
197 | public long getMaxAge() {
|
---|
198 | return maxAge;
|
---|
199 | }
|
---|
200 |
|
---|
201 | public String getDestDir() {
|
---|
202 | return destDir;
|
---|
203 | }
|
---|
204 |
|
---|
205 | public String getHttpAccept() {
|
---|
206 | return httpAccept;
|
---|
207 | }
|
---|
208 |
|
---|
209 | public CachingStrategy getCachingStrategy() {
|
---|
210 | return cachingStrategy;
|
---|
211 | }
|
---|
212 |
|
---|
213 | /**
|
---|
214 | * Get InputStream to the requested resource.
|
---|
215 | * @return the InputStream
|
---|
216 | * @throws IOException when the resource with the given name could not be retrieved
|
---|
217 | */
|
---|
218 | public InputStream getInputStream() throws IOException {
|
---|
219 | File file = getFile();
|
---|
220 | if (file == null) {
|
---|
221 | if (name != null && name.startsWith("resource://")) {
|
---|
222 | InputStream is = getClass().getResourceAsStream(
|
---|
223 | name.substring("resource:/".length()));
|
---|
224 | if (is == null)
|
---|
225 | throw new IOException(tr("Failed to open input stream for resource ''{0}''", name));
|
---|
226 | return is;
|
---|
227 | } else {
|
---|
228 | throw new IOException("No file found for: "+name);
|
---|
229 | }
|
---|
230 | }
|
---|
231 | return Files.newInputStream(file.toPath());
|
---|
232 | }
|
---|
233 |
|
---|
234 | /**
|
---|
235 | * Get the full content of the requested resource as a byte array.
|
---|
236 | * @return the full content of the requested resource as byte array
|
---|
237 | * @throws IOException in case of an I/O error
|
---|
238 | */
|
---|
239 | public byte[] getByteContent() throws IOException {
|
---|
240 | try (InputStream is = getInputStream()) {
|
---|
241 | ByteArrayOutputStream buffer = new ByteArrayOutputStream();
|
---|
242 | int nRead;
|
---|
243 | byte[] data = new byte[8192];
|
---|
244 | while ((nRead = is.read(data, 0, data.length)) != -1) {
|
---|
245 | buffer.write(data, 0, nRead);
|
---|
246 | }
|
---|
247 | buffer.flush();
|
---|
248 | return buffer.toByteArray();
|
---|
249 | }
|
---|
250 | }
|
---|
251 |
|
---|
252 | /**
|
---|
253 | * Returns {@link #getInputStream()} wrapped in a buffered reader.
|
---|
254 | * <p>
|
---|
255 | * Detects Unicode charset in use utilizing {@link UTFInputStreamReader}.
|
---|
256 | *
|
---|
257 | * @return buffered reader
|
---|
258 | * @throws IOException if any I/O error occurs
|
---|
259 | * @since 9411
|
---|
260 | */
|
---|
261 | public BufferedReader getContentReader() throws IOException {
|
---|
262 | return new BufferedReader(UTFInputStreamReader.create(getInputStream()));
|
---|
263 | }
|
---|
264 |
|
---|
265 | /**
|
---|
266 | * Get local file for the requested resource.
|
---|
267 | * @return The local cache file for URLs. If the resource is a local file,
|
---|
268 | * returns just that file.
|
---|
269 | * @throws IOException when the resource with the given name could not be retrieved
|
---|
270 | */
|
---|
271 | public synchronized File getFile() throws IOException {
|
---|
272 | if (initialized)
|
---|
273 | return cacheFile;
|
---|
274 | initialized = true;
|
---|
275 | URL url;
|
---|
276 | try {
|
---|
277 | url = new URL(name);
|
---|
278 | if ("file".equals(url.getProtocol())) {
|
---|
279 | cacheFile = new File(name.substring("file:/".length() - 1));
|
---|
280 | if (!cacheFile.exists()) {
|
---|
281 | cacheFile = new File(name.substring("file://".length() - 1));
|
---|
282 | }
|
---|
283 | } else {
|
---|
284 | cacheFile = checkLocal(url);
|
---|
285 | }
|
---|
286 | } catch (MalformedURLException e) {
|
---|
287 | if (name == null || name.startsWith("resource://")) {
|
---|
288 | return null;
|
---|
289 | } else if (name.startsWith("josmdir://")) {
|
---|
290 | cacheFile = new File(Config.getDirs().getUserDataDirectory(false), name.substring("josmdir://".length()));
|
---|
291 | } else if (name.startsWith("josmplugindir://")) {
|
---|
292 | cacheFile = new File(Main.pref.getPluginsDirectory(), name.substring("josmplugindir://".length()));
|
---|
293 | } else {
|
---|
294 | cacheFile = new File(name);
|
---|
295 | }
|
---|
296 | }
|
---|
297 | if (cacheFile == null)
|
---|
298 | throw new IOException("Unable to get cache file for "+getName());
|
---|
299 | return cacheFile;
|
---|
300 | }
|
---|
301 |
|
---|
302 | /**
|
---|
303 | * Looks for a certain entry inside a zip file and returns the entry path.
|
---|
304 | *
|
---|
305 | * Replies a file in the top level directory of the ZIP file which has an
|
---|
306 | * extension <code>extension</code>. If more than one files have this
|
---|
307 | * extension, the last file whose name includes <code>namepart</code>
|
---|
308 | * is opened.
|
---|
309 | *
|
---|
310 | * @param extension the extension of the file we're looking for
|
---|
311 | * @param namepart the name part
|
---|
312 | * @return The zip entry path of the matching file. <code>null</code> if this cached file
|
---|
313 | * doesn't represent a zip file or if there was no matching
|
---|
314 | * file in the ZIP file.
|
---|
315 | */
|
---|
316 | public String findZipEntryPath(String extension, String namepart) {
|
---|
317 | Pair<String, InputStream> ze = findZipEntryImpl(extension, namepart);
|
---|
318 | if (ze == null) return null;
|
---|
319 | return ze.a;
|
---|
320 | }
|
---|
321 |
|
---|
322 | /**
|
---|
323 | * Like {@link #findZipEntryPath}, but returns the corresponding InputStream.
|
---|
324 | * @param extension the extension of the file we're looking for
|
---|
325 | * @param namepart the name part
|
---|
326 | * @return InputStream to the matching file. <code>null</code> if this cached file
|
---|
327 | * doesn't represent a zip file or if there was no matching
|
---|
328 | * file in the ZIP file.
|
---|
329 | * @since 6148
|
---|
330 | */
|
---|
331 | public InputStream findZipEntryInputStream(String extension, String namepart) {
|
---|
332 | Pair<String, InputStream> ze = findZipEntryImpl(extension, namepart);
|
---|
333 | if (ze == null) return null;
|
---|
334 | return ze.b;
|
---|
335 | }
|
---|
336 |
|
---|
337 | private Pair<String, InputStream> findZipEntryImpl(String extension, String namepart) {
|
---|
338 | File file = null;
|
---|
339 | try {
|
---|
340 | file = getFile();
|
---|
341 | } catch (IOException ex) {
|
---|
342 | Logging.log(Logging.LEVEL_WARN, ex);
|
---|
343 | }
|
---|
344 | if (file == null)
|
---|
345 | return null;
|
---|
346 | Pair<String, InputStream> res = null;
|
---|
347 | try {
|
---|
348 | ZipFile zipFile = new ZipFile(file, StandardCharsets.UTF_8);
|
---|
349 | ZipEntry resentry = null;
|
---|
350 | Enumeration<? extends ZipEntry> entries = zipFile.entries();
|
---|
351 | while (entries.hasMoreElements()) {
|
---|
352 | ZipEntry entry = entries.nextElement();
|
---|
353 | // choose any file with correct extension. When more than one file, prefer the one which matches namepart
|
---|
354 | if (entry.getName().endsWith('.' + extension) && (resentry == null || entry.getName().indexOf(namepart) >= 0)) {
|
---|
355 | resentry = entry;
|
---|
356 | }
|
---|
357 | }
|
---|
358 | if (resentry != null) {
|
---|
359 | InputStream is = zipFile.getInputStream(resentry);
|
---|
360 | res = Pair.create(resentry.getName(), is);
|
---|
361 | } else {
|
---|
362 | Utils.close(zipFile);
|
---|
363 | }
|
---|
364 | } catch (IOException e) {
|
---|
365 | if (file.getName().endsWith(".zip")) {
|
---|
366 | Logging.log(Logging.LEVEL_WARN,
|
---|
367 | tr("Failed to open file with extension ''{2}'' and namepart ''{3}'' in zip file ''{0}''. Exception was: {1}",
|
---|
368 | file.getName(), e.toString(), extension, namepart), e);
|
---|
369 | }
|
---|
370 | }
|
---|
371 | return res;
|
---|
372 | }
|
---|
373 |
|
---|
374 | /**
|
---|
375 | * Clear the cache for the given resource.
|
---|
376 | * This forces a fresh download.
|
---|
377 | * @param name the URL
|
---|
378 | */
|
---|
379 | public static void cleanup(String name) {
|
---|
380 | cleanup(name, null);
|
---|
381 | }
|
---|
382 |
|
---|
383 | /**
|
---|
384 | * Clear the cache for the given resource.
|
---|
385 | * This forces a fresh download.
|
---|
386 | * @param name the URL
|
---|
387 | * @param destDir the destination directory (see {@link #setDestDir(java.lang.String)})
|
---|
388 | */
|
---|
389 | public static void cleanup(String name, String destDir) {
|
---|
390 | URL url;
|
---|
391 | try {
|
---|
392 | url = new URL(name);
|
---|
393 | if (!"file".equals(url.getProtocol())) {
|
---|
394 | String prefKey = getPrefKey(url, destDir, null);
|
---|
395 | List<String> localPath = new ArrayList<>(Config.getPref().getList(prefKey));
|
---|
396 | if (localPath.size() == 2) {
|
---|
397 | File lfile = new File(localPath.get(1));
|
---|
398 | if (lfile.exists()) {
|
---|
399 | Utils.deleteFile(lfile);
|
---|
400 | }
|
---|
401 | }
|
---|
402 | Config.getPref().putList(prefKey, null);
|
---|
403 | }
|
---|
404 | } catch (MalformedURLException e) {
|
---|
405 | Logging.warn(e);
|
---|
406 | }
|
---|
407 | }
|
---|
408 |
|
---|
409 | /**
|
---|
410 | * Get preference key to store the location and age of the cached file.
|
---|
411 | * 2 resources that point to the same url, but that are to be stored in different
|
---|
412 | * directories will not share a cache file.
|
---|
413 | * @param url URL
|
---|
414 | * @param destDir destination directory
|
---|
415 | * @return Preference key
|
---|
416 | */
|
---|
417 | private static String getPrefKey(URL url, String destDir, String parameter) {
|
---|
418 | StringBuilder prefKey = new StringBuilder("mirror.");
|
---|
419 | if (destDir != null) {
|
---|
420 | prefKey.append(destDir).append('.');
|
---|
421 | }
|
---|
422 | if (parameter != null) {
|
---|
423 | prefKey.append(url.toString().replaceAll("%<(.*)>", ""));
|
---|
424 | } else {
|
---|
425 | prefKey.append(url.toString());
|
---|
426 | }
|
---|
427 | return prefKey.toString().replaceAll("=", "_");
|
---|
428 | }
|
---|
429 |
|
---|
430 | private File checkLocal(URL url) throws IOException {
|
---|
431 | String prefKey = getPrefKey(url, destDir, parameter);
|
---|
432 | String urlStr = url.toExternalForm();
|
---|
433 | if (parameter != null)
|
---|
434 | urlStr = urlStr.replaceAll("%<(.*)>", "");
|
---|
435 | long age = 0L;
|
---|
436 | long maxAgeMillis = maxAge;
|
---|
437 | Long ifModifiedSince = null;
|
---|
438 | File localFile = null;
|
---|
439 | List<String> localPathEntry = new ArrayList<>(Config.getPref().getList(prefKey));
|
---|
440 | boolean offline = false;
|
---|
441 | try {
|
---|
442 | checkOfflineAccess(urlStr);
|
---|
443 | } catch (OfflineAccessException e) {
|
---|
444 | Logging.trace(e);
|
---|
445 | offline = true;
|
---|
446 | }
|
---|
447 | if (localPathEntry.size() == 2) {
|
---|
448 | localFile = new File(localPathEntry.get(1));
|
---|
449 | if (!localFile.exists()) {
|
---|
450 | localFile = null;
|
---|
451 | } else {
|
---|
452 | if (maxAge == DEFAULT_MAXTIME
|
---|
453 | || maxAge <= 0 // arbitrary value <= 0 is deprecated
|
---|
454 | ) {
|
---|
455 | maxAgeMillis = TimeUnit.SECONDS.toMillis(Config.getPref().getLong("mirror.maxtime", TimeUnit.DAYS.toSeconds(7)));
|
---|
456 | }
|
---|
457 | age = System.currentTimeMillis() - Long.parseLong(localPathEntry.get(0));
|
---|
458 | if (offline || age < maxAgeMillis) {
|
---|
459 | return localFile;
|
---|
460 | }
|
---|
461 | if (cachingStrategy == CachingStrategy.IfModifiedSince) {
|
---|
462 | ifModifiedSince = Long.valueOf(localPathEntry.get(0));
|
---|
463 | }
|
---|
464 | }
|
---|
465 | }
|
---|
466 | if (destDir == null) {
|
---|
467 | destDir = Config.getDirs().getCacheDirectory(true).getPath();
|
---|
468 | }
|
---|
469 |
|
---|
470 | File destDirFile = new File(destDir);
|
---|
471 | if (!destDirFile.exists()) {
|
---|
472 | Utils.mkDirs(destDirFile);
|
---|
473 | }
|
---|
474 |
|
---|
475 | // No local file + offline => nothing to do
|
---|
476 | if (offline) {
|
---|
477 | return null;
|
---|
478 | }
|
---|
479 |
|
---|
480 | if(parameter != null) {
|
---|
481 | String u = url.toExternalForm();
|
---|
482 | String uc;
|
---|
483 | if("".equals(parameter)) {
|
---|
484 | uc = u.replaceAll("%<(.*)>", "");
|
---|
485 | } else {
|
---|
486 | uc = u.replaceAll("%<(.*)>", "$1"+parameter);
|
---|
487 | }
|
---|
488 | if(!uc.equals(u))
|
---|
489 | url = new URL(uc);
|
---|
490 | }
|
---|
491 |
|
---|
492 | String a = urlStr.replaceAll("[^A-Za-z0-9_.-]", "_");
|
---|
493 | String localPath = "mirror_" + a;
|
---|
494 | destDirFile = new File(destDir, localPath + ".tmp");
|
---|
495 | try {
|
---|
496 | activeConnection = HttpClient.create(url)
|
---|
497 | .setAccept(httpAccept)
|
---|
498 | .setIfModifiedSince(ifModifiedSince == null ? 0L : ifModifiedSince)
|
---|
499 | .setHeaders(httpHeaders);
|
---|
500 | if (fastFail) {
|
---|
501 | activeConnection.setReadTimeout(1000);
|
---|
502 | }
|
---|
503 | final HttpClient.Response con = activeConnection.connect();
|
---|
504 | if (ifModifiedSince != null && con.getResponseCode() == HttpURLConnection.HTTP_NOT_MODIFIED) {
|
---|
505 | Logging.debug("304 Not Modified ({0})", urlStr);
|
---|
506 | if (localFile == null)
|
---|
507 | throw new AssertionError();
|
---|
508 | Config.getPref().putList(prefKey,
|
---|
509 | Arrays.asList(Long.toString(System.currentTimeMillis()), localPathEntry.get(1)));
|
---|
510 | return localFile;
|
---|
511 | } else if (con.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND) {
|
---|
512 | throw new IOException(tr("The requested URL {0} was not found", urlStr));
|
---|
513 | }
|
---|
514 | try (InputStream is = con.getContent()) {
|
---|
515 | Files.copy(is, destDirFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
|
---|
516 | }
|
---|
517 | activeConnection = null;
|
---|
518 | localFile = new File(destDir, localPath);
|
---|
519 | if (Main.platform.rename(destDirFile, localFile)) {
|
---|
520 | Config.getPref().putList(prefKey,
|
---|
521 | Arrays.asList(Long.toString(System.currentTimeMillis()), localFile.toString()));
|
---|
522 | } else {
|
---|
523 | Logging.warn(tr("Failed to rename file {0} to {1}.",
|
---|
524 | destDirFile.getPath(), localFile.getPath()));
|
---|
525 | }
|
---|
526 | } catch (IOException e) {
|
---|
527 | if (age >= maxAgeMillis && age < maxAgeMillis*2) {
|
---|
528 | Logging.warn(tr("Failed to load {0}, use cached file and retry next time: {1}", urlStr, e));
|
---|
529 | return localFile;
|
---|
530 | } else {
|
---|
531 | throw e;
|
---|
532 | }
|
---|
533 | }
|
---|
534 |
|
---|
535 | return localFile;
|
---|
536 | }
|
---|
537 |
|
---|
538 | private static void checkOfflineAccess(String urlString) {
|
---|
539 | OnlineResource.JOSM_WEBSITE.checkOfflineAccess(urlString, Main.getJOSMWebsite());
|
---|
540 | OnlineResource.OSM_API.checkOfflineAccess(urlString, OsmApi.getOsmApi().getServerUrl());
|
---|
541 | }
|
---|
542 |
|
---|
543 | /**
|
---|
544 | * Attempts to disconnect an URL connection.
|
---|
545 | * @see HttpClient#disconnect()
|
---|
546 | * @since 9411
|
---|
547 | */
|
---|
548 | @Override
|
---|
549 | public void close() {
|
---|
550 | if (activeConnection != null) {
|
---|
551 | activeConnection.disconnect();
|
---|
552 | }
|
---|
553 | }
|
---|
554 |
|
---|
555 | /**
|
---|
556 | * Clears the cached file
|
---|
557 | * @throws IOException if any I/O error occurs
|
---|
558 | * @since 10993
|
---|
559 | */
|
---|
560 | public void clear() throws IOException {
|
---|
561 | URL url;
|
---|
562 | try {
|
---|
563 | url = new URL(name);
|
---|
564 | if ("file".equals(url.getProtocol())) {
|
---|
565 | return; // this is local file - do not delete it
|
---|
566 | }
|
---|
567 | } catch (MalformedURLException e) {
|
---|
568 | return; // if it's not a URL, then it still might be a local file - better not to delete
|
---|
569 | }
|
---|
570 | File f = getFile();
|
---|
571 | if (f != null && f.exists()) {
|
---|
572 | Utils.deleteFile(f);
|
---|
573 | }
|
---|
574 | }
|
---|
575 | }
|
---|