1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package eu.siacs.conversations.utils;
17import android.content.Context;
18import android.net.Uri;
19
20import java.io.File;
21import java.io.FileInputStream;
22import java.io.IOException;
23import java.io.InputStream;
24import java.util.HashMap;
25import java.util.Map;
26import java.util.Properties;
27/**
28 * Utilities for dealing with MIME types.
29 * Used to implement java.net.URLConnection and android.webkit.MimeTypeMap.
30 */
31public final class MimeUtils {
32 private static final Map<String, String> mimeTypeToExtensionMap = new HashMap<String, String>();
33 private static final Map<String, String> extensionToMimeTypeMap = new HashMap<String, String>();
34 static {
35 // The following table is based on /etc/mime.types data minus
36 // chemical/* MIME types and MIME types that don't map to any
37 // file extensions. We also exclude top-level domain names to
38 // deal with cases like:
39 //
40 // mail.google.com/a/google.com
41 //
42 // and "active" MIME types (due to potential security issues).
43 // Note that this list is _not_ in alphabetical order and must not be sorted.
44 // The "most popular" extension must come first, so that it's the one returned
45 // by guessExtensionFromMimeType.
46 add("application/andrew-inset", "ez");
47 add("application/dsptype", "tsp");
48 add("application/hta", "hta");
49 add("application/mac-binhex40", "hqx");
50 add("application/mathematica", "nb");
51 add("application/msaccess", "mdb");
52 add("application/oda", "oda");
53 add("application/ogg", "ogg");
54 add("application/ogg", "oga");
55 add("application/pdf", "pdf");
56 add("application/pgp-keys", "key");
57 add("application/pgp-signature", "pgp");
58 add("application/pics-rules", "prf");
59 add("application/pkix-cert", "cer");
60 add("application/rar", "rar");
61 add("application/rdf+xml", "rdf");
62 add("application/rss+xml", "rss");
63 add("application/zip", "zip");
64 add("application/vnd.android.package-archive", "apk");
65 add("application/vnd.cinderella", "cdy");
66 add("application/vnd.ms-pki.stl", "stl");
67 add("application/vnd.oasis.opendocument.database", "odb");
68 add("application/vnd.oasis.opendocument.formula", "odf");
69 add("application/vnd.oasis.opendocument.graphics", "odg");
70 add("application/vnd.oasis.opendocument.graphics-template", "otg");
71 add("application/vnd.oasis.opendocument.image", "odi");
72 add("application/vnd.oasis.opendocument.spreadsheet", "ods");
73 add("application/vnd.oasis.opendocument.spreadsheet-template", "ots");
74 add("application/vnd.oasis.opendocument.text", "odt");
75 add("application/vnd.oasis.opendocument.text-master", "odm");
76 add("application/vnd.oasis.opendocument.text-template", "ott");
77 add("application/vnd.oasis.opendocument.text-web", "oth");
78 add("application/vnd.google-earth.kml+xml", "kml");
79 add("application/vnd.google-earth.kmz", "kmz");
80 add("application/msword", "doc");
81 add("application/msword", "dot");
82 add("application/vnd.openxmlformats-officedocument.wordprocessingml.document", "docx");
83 add("application/vnd.openxmlformats-officedocument.wordprocessingml.template", "dotx");
84 add("application/vnd.ms-excel", "xls");
85 add("application/vnd.ms-excel", "xlt");
86 add("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "xlsx");
87 add("application/vnd.openxmlformats-officedocument.spreadsheetml.template", "xltx");
88 add("application/vnd.ms-powerpoint", "ppt");
89 add("application/vnd.ms-powerpoint", "pot");
90 add("application/vnd.ms-powerpoint", "pps");
91 add("application/vnd.openxmlformats-officedocument.presentationml.presentation", "pptx");
92 add("application/vnd.openxmlformats-officedocument.presentationml.template", "potx");
93 add("application/vnd.openxmlformats-officedocument.presentationml.slideshow", "ppsx");
94 add("application/vnd.rim.cod", "cod");
95 add("application/vnd.smaf", "mmf");
96 add("application/vnd.stardivision.calc", "sdc");
97 add("application/vnd.stardivision.draw", "sda");
98 add("application/vnd.stardivision.impress", "sdd");
99 add("application/vnd.stardivision.impress", "sdp");
100 add("application/vnd.stardivision.math", "smf");
101 add("application/vnd.stardivision.writer", "sdw");
102 add("application/vnd.stardivision.writer", "vor");
103 add("application/vnd.stardivision.writer-global", "sgl");
104 add("application/vnd.sun.xml.calc", "sxc");
105 add("application/vnd.sun.xml.calc.template", "stc");
106 add("application/vnd.sun.xml.draw", "sxd");
107 add("application/vnd.sun.xml.draw.template", "std");
108 add("application/vnd.sun.xml.impress", "sxi");
109 add("application/vnd.sun.xml.impress.template", "sti");
110 add("application/vnd.sun.xml.math", "sxm");
111 add("application/vnd.sun.xml.writer", "sxw");
112 add("application/vnd.sun.xml.writer.global", "sxg");
113 add("application/vnd.sun.xml.writer.template", "stw");
114 add("application/vnd.visio", "vsd");
115 add("application/x-abiword", "abw");
116 add("application/x-apple-diskimage", "dmg");
117 add("application/x-bcpio", "bcpio");
118 add("application/x-bittorrent", "torrent");
119 add("application/x-cdf", "cdf");
120 add("application/x-cdlink", "vcd");
121 add("application/x-chess-pgn", "pgn");
122 add("application/x-cpio", "cpio");
123 add("application/x-debian-package", "deb");
124 add("application/x-debian-package", "udeb");
125 add("application/x-director", "dcr");
126 add("application/x-director", "dir");
127 add("application/x-director", "dxr");
128 add("application/x-dms", "dms");
129 add("application/x-doom", "wad");
130 add("application/x-dvi", "dvi");
131 add("application/x-font", "pfa");
132 add("application/x-font", "pfb");
133 add("application/x-font", "gsf");
134 add("application/x-font", "pcf");
135 add("application/x-font", "pcf.Z");
136 add("application/x-freemind", "mm");
137 // application/futuresplash isn't IANA, so application/x-futuresplash should come first.
138 add("application/x-futuresplash", "spl");
139 add("application/futuresplash", "spl");
140 add("application/x-gnumeric", "gnumeric");
141 add("application/x-go-sgf", "sgf");
142 add("application/x-graphing-calculator", "gcf");
143 add("application/x-gtar", "tgz");
144 add("application/x-gtar", "gtar");
145 add("application/x-gtar", "taz");
146 add("application/x-hdf", "hdf");
147 add("application/x-ica", "ica");
148 add("application/x-internet-signup", "ins");
149 add("application/x-internet-signup", "isp");
150 add("application/x-iphone", "iii");
151 add("application/x-iso9660-image", "iso");
152 add("application/x-jmol", "jmz");
153 add("application/x-kchart", "chrt");
154 add("application/x-killustrator", "kil");
155 add("application/x-koan", "skp");
156 add("application/x-koan", "skd");
157 add("application/x-koan", "skt");
158 add("application/x-koan", "skm");
159 add("application/x-kpresenter", "kpr");
160 add("application/x-kpresenter", "kpt");
161 add("application/x-kspread", "ksp");
162 add("application/x-kword", "kwd");
163 add("application/x-kword", "kwt");
164 add("application/x-latex", "latex");
165 add("application/x-lha", "lha");
166 add("application/x-lzh", "lzh");
167 add("application/x-lzx", "lzx");
168 add("application/x-maker", "frm");
169 add("application/x-maker", "maker");
170 add("application/x-maker", "frame");
171 add("application/x-maker", "fb");
172 add("application/x-maker", "book");
173 add("application/x-maker", "fbdoc");
174 add("application/x-mif", "mif");
175 add("application/x-ms-wmd", "wmd");
176 add("application/x-ms-wmz", "wmz");
177 add("application/x-msi", "msi");
178 add("application/x-ns-proxy-autoconfig", "pac");
179 add("application/x-nwc", "nwc");
180 add("application/x-object", "o");
181 add("application/x-oz-application", "oza");
182 add("application/x-pem-file", "pem");
183 add("application/x-pkcs12", "p12");
184 add("application/x-pkcs12", "pfx");
185 add("application/x-pkcs7-certreqresp", "p7r");
186 add("application/x-pkcs7-crl", "crl");
187 add("application/x-quicktimeplayer", "qtl");
188 add("application/x-shar", "shar");
189 add("application/x-shockwave-flash", "swf");
190 add("application/x-stuffit", "sit");
191 add("application/x-sv4cpio", "sv4cpio");
192 add("application/x-sv4crc", "sv4crc");
193 add("application/x-tar", "tar");
194 add("application/x-texinfo", "texinfo");
195 add("application/x-texinfo", "texi");
196 add("application/x-troff", "t");
197 add("application/x-troff", "roff");
198 add("application/x-troff-man", "man");
199 add("application/x-ustar", "ustar");
200 add("application/x-wais-source", "src");
201 add("application/x-wingz", "wz");
202 add("application/x-webarchive", "webarchive");
203 add("application/x-webarchive-xml", "webarchivexml");
204 add("application/x-x509-ca-cert", "crt");
205 add("application/x-x509-user-cert", "crt");
206 add("application/x-x509-server-cert", "crt");
207 add("application/x-xcf", "xcf");
208 add("application/x-xfig", "fig");
209 add("application/xhtml+xml", "xhtml");
210 add("audio/3gpp", "3gpp");
211 add("audio/aac", "aac");
212 add("audio/aac-adts", "aac");
213 add("audio/amr", "amr");
214 add("audio/amr-wb", "awb");
215 add("audio/basic", "snd");
216 add("audio/flac", "flac");
217 add("application/x-flac", "flac");
218 add("audio/imelody", "imy");
219 add("audio/midi", "mid");
220 add("audio/midi", "midi");
221 add("audio/midi", "ota");
222 add("audio/midi", "kar");
223 add("audio/midi", "rtttl");
224 add("audio/midi", "xmf");
225 add("audio/mobile-xmf", "mxmf");
226 // add ".mp3" first so it will be the default for guessExtensionFromMimeType
227 add("audio/mpeg", "mp3");
228 add("audio/mpeg", "mpga");
229 add("audio/mpeg", "mpega");
230 add("audio/mpeg", "mp2");
231 add("audio/mpeg", "m4a");
232 add("audio/mpegurl", "m3u");
233 add("audio/prs.sid", "sid");
234 add("audio/x-aiff", "aif");
235 add("audio/x-aiff", "aiff");
236 add("audio/x-aiff", "aifc");
237 add("audio/x-gsm", "gsm");
238 add("audio/x-matroska", "mka");
239 add("audio/x-mpegurl", "m3u");
240 add("audio/x-ms-wma", "wma");
241 add("audio/x-ms-wax", "wax");
242 add("audio/x-pn-realaudio", "ra");
243 add("audio/x-pn-realaudio", "rm");
244 add("audio/x-pn-realaudio", "ram");
245 add("audio/x-realaudio", "ra");
246 add("audio/x-scpls", "pls");
247 add("audio/x-sd2", "sd2");
248 add("audio/x-wav", "wav");
249 // image/bmp isn't IANA, so image/x-ms-bmp should come first.
250 add("image/x-ms-bmp", "bmp");
251 add("image/bmp", "bmp");
252 add("image/gif", "gif");
253 // image/ico isn't IANA, so image/x-icon should come first.
254 add("image/x-icon", "ico");
255 add("image/ico", "cur");
256 add("image/ico", "ico");
257 add("image/ief", "ief");
258 // add ".jpg" first so it will be the default for guessExtensionFromMimeType
259 add("image/jpeg", "jpg");
260 add("image/jpeg", "jpeg");
261 add("image/jpeg", "jpe");
262 add("image/pcx", "pcx");
263 add("image/png", "png");
264 add("image/svg+xml", "svg");
265 add("image/svg+xml", "svgz");
266 add("image/tiff", "tiff");
267 add("image/tiff", "tif");
268 add("image/vnd.djvu", "djvu");
269 add("image/vnd.djvu", "djv");
270 add("image/vnd.wap.wbmp", "wbmp");
271 add("image/webp", "webp");
272 add("image/x-cmu-raster", "ras");
273 add("image/x-coreldraw", "cdr");
274 add("image/x-coreldrawpattern", "pat");
275 add("image/x-coreldrawtemplate", "cdt");
276 add("image/x-corelphotopaint", "cpt");
277 add("image/x-jg", "art");
278 add("image/x-jng", "jng");
279 add("image/x-photoshop", "psd");
280 add("image/x-portable-anymap", "pnm");
281 add("image/x-portable-bitmap", "pbm");
282 add("image/x-portable-graymap", "pgm");
283 add("image/x-portable-pixmap", "ppm");
284 add("image/x-rgb", "rgb");
285 add("image/x-xbitmap", "xbm");
286 add("image/x-xpixmap", "xpm");
287 add("image/x-xwindowdump", "xwd");
288 add("model/iges", "igs");
289 add("model/iges", "iges");
290 add("model/mesh", "msh");
291 add("model/mesh", "mesh");
292 add("model/mesh", "silo");
293 add("text/calendar", "ics");
294 add("text/calendar", "icz");
295 add("text/comma-separated-values", "csv");
296 add("text/css", "css");
297 add("text/html", "htm");
298 add("text/html", "html");
299 add("text/h323", "323");
300 add("text/iuls", "uls");
301 add("text/mathml", "mml");
302 // add ".txt" first so it will be the default for guessExtensionFromMimeType
303 add("text/plain", "txt");
304 add("text/plain", "asc");
305 add("text/plain", "text");
306 add("text/plain", "diff");
307 add("text/plain", "po"); // reserve "pot" for vnd.ms-powerpoint
308 add("text/richtext", "rtx");
309 add("text/rtf", "rtf");
310 add("text/text", "phps");
311 add("text/tab-separated-values", "tsv");
312 add("text/xml", "xml");
313 add("text/x-bibtex", "bib");
314 add("text/x-boo", "boo");
315 add("text/x-c++hdr", "hpp");
316 add("text/x-c++hdr", "h++");
317 add("text/x-c++hdr", "hxx");
318 add("text/x-c++hdr", "hh");
319 add("text/x-c++src", "cpp");
320 add("text/x-c++src", "c++");
321 add("text/x-c++src", "cc");
322 add("text/x-c++src", "cxx");
323 add("text/x-chdr", "h");
324 add("text/x-component", "htc");
325 add("text/x-csh", "csh");
326 add("text/x-csrc", "c");
327 add("text/x-dsrc", "d");
328 add("text/x-haskell", "hs");
329 add("text/x-java", "java");
330 add("text/x-literate-haskell", "lhs");
331 add("text/x-moc", "moc");
332 add("text/x-pascal", "p");
333 add("text/x-pascal", "pas");
334 add("text/x-pcs-gcd", "gcd");
335 add("text/x-setext", "etx");
336 add("text/x-tcl", "tcl");
337 add("text/x-tex", "tex");
338 add("text/x-tex", "ltx");
339 add("text/x-tex", "sty");
340 add("text/x-tex", "cls");
341 add("text/x-vcalendar", "vcs");
342 add("text/x-vcard", "vcf");
343 add("video/3gpp", "3gpp");
344 add("video/3gpp", "3gp");
345 add("video/3gpp2", "3gpp2");
346 add("video/3gpp2", "3g2");
347 add("video/avi", "avi");
348 add("video/dl", "dl");
349 add("video/dv", "dif");
350 add("video/dv", "dv");
351 add("video/fli", "fli");
352 add("video/m4v", "m4v");
353 add("video/mp2ts", "ts");
354 add("video/mpeg", "mpeg");
355 add("video/mpeg", "mpg");
356 add("video/mpeg", "mpe");
357 add("video/mp4", "mp4");
358 add("video/mpeg", "VOB");
359 add("video/quicktime", "qt");
360 add("video/quicktime", "mov");
361 add("video/vnd.mpegurl", "mxu");
362 add("video/webm", "webm");
363 add("video/x-la-asf", "lsf");
364 add("video/x-la-asf", "lsx");
365 add("video/x-matroska", "mkv");
366 add("video/x-mng", "mng");
367 add("video/x-ms-asf", "asf");
368 add("video/x-ms-asf", "asx");
369 add("video/x-ms-wm", "wm");
370 add("video/x-ms-wmv", "wmv");
371 add("video/x-ms-wmx", "wmx");
372 add("video/x-ms-wvx", "wvx");
373 add("video/x-sgi-movie", "movie");
374 add("video/x-webex", "wrf");
375 add("x-conference/x-cooltalk", "ice");
376 add("x-epoc/x-sisx-app", "sisx");
377 applyOverrides();
378 }
379 private static void add(String mimeType, String extension) {
380 // If we have an existing x -> y mapping, we do not want to
381 // override it with another mapping x -> y2.
382 // If a mime type maps to several extensions
383 // the first extension added is considered the most popular
384 // so we do not want to overwrite it later.
385 if (!mimeTypeToExtensionMap.containsKey(mimeType)) {
386 mimeTypeToExtensionMap.put(mimeType, extension);
387 }
388 if (!extensionToMimeTypeMap.containsKey(extension)) {
389 extensionToMimeTypeMap.put(extension, mimeType);
390 }
391 }
392 private static InputStream getContentTypesPropertiesStream() {
393 // User override?
394 String userTable = System.getProperty("content.types.user.table");
395 if (userTable != null) {
396 File f = new File(userTable);
397 if (f.exists()) {
398 try {
399 return new FileInputStream(f);
400 } catch (IOException ignored) {
401 }
402 }
403 }
404 // Standard location?
405 File f = new File(System.getProperty("java.home"), "lib" + File.separator + "content-types.properties");
406 if (f.exists()) {
407 try {
408 return new FileInputStream(f);
409 } catch (IOException ignored) {
410 }
411 }
412 return null;
413 }
414 /**
415 * This isn't what the RI does. The RI doesn't have hard-coded defaults, so supplying your
416 * own "content.types.user.table" means you don't get any of the built-ins, and the built-ins
417 * come from "$JAVA_HOME/lib/content-types.properties".
418 */
419 private static void applyOverrides() {
420 // Get the appropriate InputStream to read overrides from, if any.
421 InputStream stream = getContentTypesPropertiesStream();
422 if (stream == null) {
423 return;
424 }
425 try {
426 try {
427 // Read the properties file...
428 Properties overrides = new Properties();
429 overrides.load(stream);
430 // And translate its mapping to ours...
431 for (Map.Entry<Object, Object> entry : overrides.entrySet()) {
432 String extension = (String) entry.getKey();
433 String mimeType = (String) entry.getValue();
434 add(mimeType, extension);
435 }
436 } finally {
437 stream.close();
438 }
439 } catch (IOException ignored) {
440 }
441 }
442 private MimeUtils() {
443 }
444 /**
445 * Returns true if the given MIME type has an entry in the map.
446 * @param mimeType A MIME type (i.e. text/plain)
447 * @return True iff there is a mimeType entry in the map.
448 */
449 public static boolean hasMimeType(String mimeType) {
450 if (mimeType == null || mimeType.isEmpty()) {
451 return false;
452 }
453 return mimeTypeToExtensionMap.containsKey(mimeType);
454 }
455 /**
456 * Returns the MIME type for the given extension.
457 * @param extension A file extension without the leading '.'
458 * @return The MIME type for the given extension or null iff there is none.
459 */
460 public static String guessMimeTypeFromExtension(String extension) {
461 if (extension == null || extension.isEmpty()) {
462 return null;
463 }
464 return extensionToMimeTypeMap.get(extension.toLowerCase());
465 }
466 /**
467 * Returns true if the given extension has a registered MIME type.
468 * @param extension A file extension without the leading '.'
469 * @return True iff there is an extension entry in the map.
470 */
471 public static boolean hasExtension(String extension) {
472 if (extension == null || extension.isEmpty()) {
473 return false;
474 }
475 return extensionToMimeTypeMap.containsKey(extension);
476 }
477 /**
478 * Returns the registered extension for the given MIME type. Note that some
479 * MIME types map to multiple extensions. This call will return the most
480 * common extension for the given MIME type.
481 * @param mimeType A MIME type (i.e. text/plain)
482 * @return The extension for the given MIME type or null iff there is none.
483 */
484 public static String guessExtensionFromMimeType(String mimeType) {
485 if (mimeType == null || mimeType.isEmpty()) {
486 return null;
487 }
488 return mimeTypeToExtensionMap.get(mimeType);
489 }
490
491 public static String guessMimeTypeFromUri(Context context, Uri uri) {
492 // try the content resolver
493 String mimeType;
494 try {
495 mimeType = context.getContentResolver().getType(uri);
496 } catch (Throwable throwable) {
497 mimeType = null;
498 }
499 // try the extension
500 if (mimeType == null && uri.getPath() != null) {
501 String path = uri.getPath();
502 int start = path.lastIndexOf('.') + 1;
503 if (start < path.length()) {
504 mimeType = MimeUtils.guessMimeTypeFromExtension(path.substring(start));
505 }
506 }
507 // sometimes this works (as with the commit content api)
508 if (mimeType == null) {
509 mimeType = uri.getQueryParameter("mimeType");
510 }
511 return mimeType;
512 }
513}