diff options
Diffstat (limited to 'src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java')
| -rw-r--r-- | src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java | 487 |
1 files changed, 487 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java b/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java new file mode 100644 index 00000000..c1c40f92 --- /dev/null +++ b/src/main/java/de/thedevstack/conversationsplus/utils/MimeUtils.java @@ -0,0 +1,487 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package de.thedevstack.conversationsplus.utils; +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.util.HashMap; +import java.util.Map; +import java.util.Properties; +/** + * Utilities for dealing with MIME types. + * Used to implement java.net.URLConnection and android.webkit.MimeTypeMap. + */ +public final class MimeUtils { + private static final Map<String, String> mimeTypeToExtensionMap = new HashMap<String, String>(); + private static final Map<String, String> extensionToMimeTypeMap = new HashMap<String, String>(); + static { + // The following table is based on /etc/mime.types data minus + // chemical/* MIME types and MIME types that don't map to any + // file extensions. We also exclude top-level domain names to + // deal with cases like: + // + // mail.google.com/a/google.com + // + // and "active" MIME types (due to potential security issues). + // Note that this list is _not_ in alphabetical order and must not be sorted. + // The "most popular" extension must come first, so that it's the one returned + // by guessExtensionFromMimeType. + add("application/andrew-inset", "ez"); + add("application/dsptype", "tsp"); + add("application/hta", "hta"); + add("application/mac-binhex40", "hqx"); + add("application/mathematica", "nb"); + add("application/msaccess", "mdb"); + add("application/oda", "oda"); + add("application/ogg", "ogg"); + add("application/ogg", "oga"); + add("application/pdf", "pdf"); + add("application/pgp-keys", "key"); + add("application/pgp-signature", "pgp"); + add("application/pics-rules", "prf"); + add("application/pkix-cert", "cer"); + add("application/rar", "rar"); + add("application/rdf+xml", "rdf"); + add("application/rss+xml", "rss"); + add("application/zip", "zip"); + add("application/vnd.android.package-archive", "apk"); + add("application/vnd.cinderella", "cdy"); + add("application/vnd.ms-pki.stl", "stl"); + add("application/vnd.oasis.opendocument.database", "odb"); + add("application/vnd.oasis.opendocument.formula", "odf"); + add("application/vnd.oasis.opendocument.graphics", "odg"); + add("application/vnd.oasis.opendocument.graphics-template", "otg"); + add("application/vnd.oasis.opendocument.image", "odi"); + add("application/vnd.oasis.opendocument.spreadsheet", "ods"); + add("application/vnd.oasis.opendocument.spreadsheet-template", "ots"); + add("application/vnd.oasis.opendocument.text", "odt"); + add("application/vnd.oasis.opendocument.text-master", "odm"); + add("application/vnd.oasis.opendocument.text-template", "ott"); + add("application/vnd.oasis.opendocument.text-web", "oth"); + add("application/vnd.google-earth.kml+xml", "kml"); + add("application/vnd.google-earth.kmz", "kmz"); + add("application/msword", "doc"); + add("application/msword", "dot"); + add("application/vnd.openxmlformats-officedocument.wordprocessingml.document", "docx"); + add("application/vnd.openxmlformats-officedocument.wordprocessingml.template", "dotx"); + add("application/vnd.ms-excel", "xls"); + add("application/vnd.ms-excel", "xlt"); + add("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "xlsx"); + add("application/vnd.openxmlformats-officedocument.spreadsheetml.template", "xltx"); + add("application/vnd.ms-powerpoint", "ppt"); + add("application/vnd.ms-powerpoint", "pot"); + add("application/vnd.ms-powerpoint", "pps"); + add("application/vnd.openxmlformats-officedocument.presentationml.presentation", "pptx"); + add("application/vnd.openxmlformats-officedocument.presentationml.template", "potx"); + add("application/vnd.openxmlformats-officedocument.presentationml.slideshow", "ppsx"); + add("application/vnd.rim.cod", "cod"); + add("application/vnd.smaf", "mmf"); + add("application/vnd.stardivision.calc", "sdc"); + add("application/vnd.stardivision.draw", "sda"); + add("application/vnd.stardivision.impress", "sdd"); + add("application/vnd.stardivision.impress", "sdp"); + add("application/vnd.stardivision.math", "smf"); + add("application/vnd.stardivision.writer", "sdw"); + add("application/vnd.stardivision.writer", "vor"); + add("application/vnd.stardivision.writer-global", "sgl"); + add("application/vnd.sun.xml.calc", "sxc"); + add("application/vnd.sun.xml.calc.template", "stc"); + add("application/vnd.sun.xml.draw", "sxd"); + add("application/vnd.sun.xml.draw.template", "std"); + add("application/vnd.sun.xml.impress", "sxi"); + add("application/vnd.sun.xml.impress.template", "sti"); + add("application/vnd.sun.xml.math", "sxm"); + add("application/vnd.sun.xml.writer", "sxw"); + add("application/vnd.sun.xml.writer.global", "sxg"); + add("application/vnd.sun.xml.writer.template", "stw"); + add("application/vnd.visio", "vsd"); + add("application/x-abiword", "abw"); + add("application/x-apple-diskimage", "dmg"); + add("application/x-bcpio", "bcpio"); + add("application/x-bittorrent", "torrent"); + add("application/x-cdf", "cdf"); + add("application/x-cdlink", "vcd"); + add("application/x-chess-pgn", "pgn"); + add("application/x-cpio", "cpio"); + add("application/x-debian-package", "deb"); + add("application/x-debian-package", "udeb"); + add("application/x-director", "dcr"); + add("application/x-director", "dir"); + add("application/x-director", "dxr"); + add("application/x-dms", "dms"); + add("application/x-doom", "wad"); + add("application/x-dvi", "dvi"); + add("application/x-font", "pfa"); + add("application/x-font", "pfb"); + add("application/x-font", "gsf"); + add("application/x-font", "pcf"); + add("application/x-font", "pcf.Z"); + add("application/x-freemind", "mm"); + // application/futuresplash isn't IANA, so application/x-futuresplash should come first. + add("application/x-futuresplash", "spl"); + add("application/futuresplash", "spl"); + add("application/x-gnumeric", "gnumeric"); + add("application/x-go-sgf", "sgf"); + add("application/x-graphing-calculator", "gcf"); + add("application/x-gtar", "tgz"); + add("application/x-gtar", "gtar"); + add("application/x-gtar", "taz"); + add("application/x-hdf", "hdf"); + add("application/x-ica", "ica"); + add("application/x-internet-signup", "ins"); + add("application/x-internet-signup", "isp"); + add("application/x-iphone", "iii"); + add("application/x-iso9660-image", "iso"); + add("application/x-jmol", "jmz"); + add("application/x-kchart", "chrt"); + add("application/x-killustrator", "kil"); + add("application/x-koan", "skp"); + add("application/x-koan", "skd"); + add("application/x-koan", "skt"); + add("application/x-koan", "skm"); + add("application/x-kpresenter", "kpr"); + add("application/x-kpresenter", "kpt"); + add("application/x-kspread", "ksp"); + add("application/x-kword", "kwd"); + add("application/x-kword", "kwt"); + add("application/x-latex", "latex"); + add("application/x-lha", "lha"); + add("application/x-lzh", "lzh"); + add("application/x-lzx", "lzx"); + add("application/x-maker", "frm"); + add("application/x-maker", "maker"); + add("application/x-maker", "frame"); + add("application/x-maker", "fb"); + add("application/x-maker", "book"); + add("application/x-maker", "fbdoc"); + add("application/x-mif", "mif"); + add("application/x-ms-wmd", "wmd"); + add("application/x-ms-wmz", "wmz"); + add("application/x-msi", "msi"); + add("application/x-ns-proxy-autoconfig", "pac"); + add("application/x-nwc", "nwc"); + add("application/x-object", "o"); + add("application/x-oz-application", "oza"); + add("application/x-pem-file", "pem"); + add("application/x-pkcs12", "p12"); + add("application/x-pkcs12", "pfx"); + add("application/x-pkcs7-certreqresp", "p7r"); + add("application/x-pkcs7-crl", "crl"); + add("application/x-quicktimeplayer", "qtl"); + add("application/x-shar", "shar"); + add("application/x-shockwave-flash", "swf"); + add("application/x-stuffit", "sit"); + add("application/x-sv4cpio", "sv4cpio"); + add("application/x-sv4crc", "sv4crc"); + add("application/x-tar", "tar"); + add("application/x-texinfo", "texinfo"); + add("application/x-texinfo", "texi"); + add("application/x-troff", "t"); + add("application/x-troff", "roff"); + add("application/x-troff-man", "man"); + add("application/x-ustar", "ustar"); + add("application/x-wais-source", "src"); + add("application/x-wingz", "wz"); + add("application/x-webarchive", "webarchive"); + add("application/x-webarchive-xml", "webarchivexml"); + add("application/x-x509-ca-cert", "crt"); + add("application/x-x509-user-cert", "crt"); + add("application/x-x509-server-cert", "crt"); + add("application/x-xcf", "xcf"); + add("application/x-xfig", "fig"); + add("application/xhtml+xml", "xhtml"); + add("audio/3gpp", "3gpp"); + add("audio/aac", "aac"); + add("audio/aac-adts", "aac"); + add("audio/amr", "amr"); + add("audio/amr-wb", "awb"); + add("audio/basic", "snd"); + add("audio/flac", "flac"); + add("application/x-flac", "flac"); + add("audio/imelody", "imy"); + add("audio/midi", "mid"); + add("audio/midi", "midi"); + add("audio/midi", "ota"); + add("audio/midi", "kar"); + add("audio/midi", "rtttl"); + add("audio/midi", "xmf"); + add("audio/mobile-xmf", "mxmf"); + // add ".mp3" first so it will be the default for guessExtensionFromMimeType + add("audio/mpeg", "mp3"); + add("audio/mpeg", "mpga"); + add("audio/mpeg", "mpega"); + add("audio/mpeg", "mp2"); + add("audio/mpeg", "m4a"); + add("audio/mpegurl", "m3u"); + add("audio/prs.sid", "sid"); + add("audio/x-aiff", "aif"); + add("audio/x-aiff", "aiff"); + add("audio/x-aiff", "aifc"); + add("audio/x-gsm", "gsm"); + add("audio/x-matroska", "mka"); + add("audio/x-mpegurl", "m3u"); + add("audio/x-ms-wma", "wma"); + add("audio/x-ms-wax", "wax"); + add("audio/x-pn-realaudio", "ra"); + add("audio/x-pn-realaudio", "rm"); + add("audio/x-pn-realaudio", "ram"); + add("audio/x-realaudio", "ra"); + add("audio/x-scpls", "pls"); + add("audio/x-sd2", "sd2"); + add("audio/x-wav", "wav"); + // image/bmp isn't IANA, so image/x-ms-bmp should come first. + add("image/x-ms-bmp", "bmp"); + add("image/bmp", "bmp"); + add("image/gif", "gif"); + // image/ico isn't IANA, so image/x-icon should come first. + add("image/x-icon", "ico"); + add("image/ico", "cur"); + add("image/ico", "ico"); + add("image/ief", "ief"); + // add ".jpg" first so it will be the default for guessExtensionFromMimeType + add("image/jpeg", "jpg"); + add("image/jpeg", "jpeg"); + add("image/jpeg", "jpe"); + add("image/pcx", "pcx"); + add("image/png", "png"); + add("image/svg+xml", "svg"); + add("image/svg+xml", "svgz"); + add("image/tiff", "tiff"); + add("image/tiff", "tif"); + add("image/vnd.djvu", "djvu"); + add("image/vnd.djvu", "djv"); + add("image/vnd.wap.wbmp", "wbmp"); + add("image/webp", "webp"); + add("image/x-cmu-raster", "ras"); + add("image/x-coreldraw", "cdr"); + add("image/x-coreldrawpattern", "pat"); + add("image/x-coreldrawtemplate", "cdt"); + add("image/x-corelphotopaint", "cpt"); + add("image/x-jg", "art"); + add("image/x-jng", "jng"); + add("image/x-photoshop", "psd"); + add("image/x-portable-anymap", "pnm"); + add("image/x-portable-bitmap", "pbm"); + add("image/x-portable-graymap", "pgm"); + add("image/x-portable-pixmap", "ppm"); + add("image/x-rgb", "rgb"); + add("image/x-xbitmap", "xbm"); + add("image/x-xpixmap", "xpm"); + add("image/x-xwindowdump", "xwd"); + add("model/iges", "igs"); + add("model/iges", "iges"); + add("model/mesh", "msh"); + add("model/mesh", "mesh"); + add("model/mesh", "silo"); + add("text/calendar", "ics"); + add("text/calendar", "icz"); + add("text/comma-separated-values", "csv"); + add("text/css", "css"); + add("text/html", "htm"); + add("text/html", "html"); + add("text/h323", "323"); + add("text/iuls", "uls"); + add("text/mathml", "mml"); + // add ".txt" first so it will be the default for guessExtensionFromMimeType + add("text/plain", "txt"); + add("text/plain", "asc"); + add("text/plain", "text"); + add("text/plain", "diff"); + add("text/plain", "po"); // reserve "pot" for vnd.ms-powerpoint + add("text/richtext", "rtx"); + add("text/rtf", "rtf"); + add("text/text", "phps"); + add("text/tab-separated-values", "tsv"); + add("text/xml", "xml"); + add("text/x-bibtex", "bib"); + add("text/x-boo", "boo"); + add("text/x-c++hdr", "hpp"); + add("text/x-c++hdr", "h++"); + add("text/x-c++hdr", "hxx"); + add("text/x-c++hdr", "hh"); + add("text/x-c++src", "cpp"); + add("text/x-c++src", "c++"); + add("text/x-c++src", "cc"); + add("text/x-c++src", "cxx"); + add("text/x-chdr", "h"); + add("text/x-component", "htc"); + add("text/x-csh", "csh"); + add("text/x-csrc", "c"); + add("text/x-dsrc", "d"); + add("text/x-haskell", "hs"); + add("text/x-java", "java"); + add("text/x-literate-haskell", "lhs"); + add("text/x-moc", "moc"); + add("text/x-pascal", "p"); + add("text/x-pascal", "pas"); + add("text/x-pcs-gcd", "gcd"); + add("text/x-setext", "etx"); + add("text/x-tcl", "tcl"); + add("text/x-tex", "tex"); + add("text/x-tex", "ltx"); + add("text/x-tex", "sty"); + add("text/x-tex", "cls"); + add("text/x-vcalendar", "vcs"); + add("text/x-vcard", "vcf"); + add("video/3gpp", "3gpp"); + add("video/3gpp", "3gp"); + add("video/3gpp2", "3gpp2"); + add("video/3gpp2", "3g2"); + add("video/avi", "avi"); + add("video/dl", "dl"); + add("video/dv", "dif"); + add("video/dv", "dv"); + add("video/fli", "fli"); + add("video/m4v", "m4v"); + add("video/mp2ts", "ts"); + add("video/mpeg", "mpeg"); + add("video/mpeg", "mpg"); + add("video/mpeg", "mpe"); + add("video/mp4", "mp4"); + add("video/mpeg", "VOB"); + add("video/quicktime", "qt"); + add("video/quicktime", "mov"); + add("video/vnd.mpegurl", "mxu"); + add("video/webm", "webm"); + add("video/x-la-asf", "lsf"); + add("video/x-la-asf", "lsx"); + add("video/x-matroska", "mkv"); + add("video/x-mng", "mng"); + add("video/x-ms-asf", "asf"); + add("video/x-ms-asf", "asx"); + add("video/x-ms-wm", "wm"); + add("video/x-ms-wmv", "wmv"); + add("video/x-ms-wmx", "wmx"); + add("video/x-ms-wvx", "wvx"); + add("video/x-sgi-movie", "movie"); + add("video/x-webex", "wrf"); + add("x-conference/x-cooltalk", "ice"); + add("x-epoc/x-sisx-app", "sisx"); + applyOverrides(); + } + private static void add(String mimeType, String extension) { + // If we have an existing x -> y mapping, we do not want to + // override it with another mapping x -> y2. + // If a mime type maps to several extensions + // the first extension added is considered the most popular + // so we do not want to overwrite it later. + if (!mimeTypeToExtensionMap.containsKey(mimeType)) { + mimeTypeToExtensionMap.put(mimeType, extension); + } + if (!extensionToMimeTypeMap.containsKey(extension)) { + extensionToMimeTypeMap.put(extension, mimeType); + } + } + private static InputStream getContentTypesPropertiesStream() { + // User override? + String userTable = System.getProperty("content.types.user.table"); + if (userTable != null) { + File f = new File(userTable); + if (f.exists()) { + try { + return new FileInputStream(f); + } catch (IOException ignored) { + } + } + } + // Standard location? + File f = new File(System.getProperty("java.home"), "lib" + File.separator + "content-types.properties"); + if (f.exists()) { + try { + return new FileInputStream(f); + } catch (IOException ignored) { + } + } + return null; + } + /** + * This isn't what the RI does. The RI doesn't have hard-coded defaults, so supplying your + * own "content.types.user.table" means you don't get any of the built-ins, and the built-ins + * come from "$JAVA_HOME/lib/content-types.properties". + */ + private static void applyOverrides() { + // Get the appropriate InputStream to read overrides from, if any. + InputStream stream = getContentTypesPropertiesStream(); + if (stream == null) { + return; + } + try { + try { + // Read the properties file... + Properties overrides = new Properties(); + overrides.load(stream); + // And translate its mapping to ours... + for (Map.Entry<Object, Object> entry : overrides.entrySet()) { + String extension = (String) entry.getKey(); + String mimeType = (String) entry.getValue(); + add(mimeType, extension); + } + } finally { + stream.close(); + } + } catch (IOException ignored) { + } + } + private MimeUtils() { + } + /** + * Returns true if the given MIME type has an entry in the map. + * @param mimeType A MIME type (i.e. text/plain) + * @return True iff there is a mimeType entry in the map. + */ + public static boolean hasMimeType(String mimeType) { + if (mimeType == null || mimeType.isEmpty()) { + return false; + } + return mimeTypeToExtensionMap.containsKey(mimeType); + } + /** + * Returns the MIME type for the given extension. + * @param extension A file extension without the leading '.' + * @return The MIME type for the given extension or null iff there is none. + */ + public static String guessMimeTypeFromExtension(String extension) { + if (extension == null || extension.isEmpty()) { + return null; + } + return extensionToMimeTypeMap.get(extension); + } + /** + * Returns true if the given extension has a registered MIME type. + * @param extension A file extension without the leading '.' + * @return True iff there is an extension entry in the map. + */ + public static boolean hasExtension(String extension) { + if (extension == null || extension.isEmpty()) { + return false; + } + return extensionToMimeTypeMap.containsKey(extension); + } + /** + * Returns the registered extension for the given MIME type. Note that some + * MIME types map to multiple extensions. This call will return the most + * common extension for the given MIME type. + * @param mimeType A MIME type (i.e. text/plain) + * @return The extension for the given MIME type or null iff there is none. + */ + public static String guessExtensionFromMimeType(String mimeType) { + if (mimeType == null || mimeType.isEmpty()) { + return null; + } + return mimeTypeToExtensionMap.get(mimeType); + } +} |