rename 2/2

src/com/owncloud/android/utils/MimeTypeUtil.java

@@ -0,0 +1,568 @@
+/**
+ *   ownCloud Android client application
+ *
+ *   Copyright (C) 2016 ownCloud Inc.
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License version 2,
+ *   as published by the Free Software Foundation.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package com.owncloud.android.utils;
+
+import android.net.Uri;
+import android.webkit.MimeTypeMap;
+
+import com.owncloud.android.R;
+import com.owncloud.android.datamodel.OCFile;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * <p>Helper class for detecting the right icon for a file or folder,
+ * based on its mime type and file extension.</p>
+ *
+ * This class maintains all the necessary mappings fot these detections.<br/>
+ * In order to add further mappings, there are up to three look up maps that need further values:
+ * <ol>
+ *     <li>
+ *         {@link MimeTypeUtil#FILE_EXTENSION_TO_MIMETYPE_MAPPING}<br/>
+ *         to add a new file extension to mime type mapping
+ *     </li>
+ *     <li>
+ *         {@link MimeTypeUtil#MIMETYPE_TO_ICON_MAPPING}<br/>
+ *         to add a new mapping of a mime type to an icon mapping
+ *     </li>
+ *     <li>
+ *         {@link MimeTypeUtil#MAINMIMETYPE_TO_ICON_MAPPING}<br/>
+ *         to add a new mapping for the main part of a mime type.
+ *         This is a list of fallback mappings in case there is no mapping for the complete mime type
+ *     </li>
+ * </ol>
+ */
+public class MimeTypeUtil {
+    /** Mapping: icon for mime type */
+    private static final Map<String, Integer> MIMETYPE_TO_ICON_MAPPING = new HashMap<>();
+    /** Mapping: icon for main mime type (first part of a mime type declaration). */
+    private static final Map<String, Integer> MAINMIMETYPE_TO_ICON_MAPPING = new HashMap<>();
+    /** Mapping: mime type for file extension. */
+    private static final Map<String, List<String>> FILE_EXTENSION_TO_MIMETYPE_MAPPING = new HashMap<>();
+
+    static {
+        populateFileExtensionMimeTypeMapping();
+        populateMimeTypeIconMapping();
+        populateMainMimeTypeMapping();
+    }
+
+    /**
+     * Returns the resource identifier of an image to use as icon associated to a known MIME type.
+     *
+     * @param mimetype MIME type string; if NULL, the method tries to guess it from the extension in filename
+     * @param filename Name, with extension.
+     * @return Identifier of an image resource.
+     */
+    public static int getFileTypeIconId(String mimetype, String filename) {
+        List<String> possibleMimeTypes;
+        if (mimetype == null) {
+            possibleMimeTypes = determineMimeTypesByFilename(filename);
+        } else {
+            possibleMimeTypes = Collections.singletonList(mimetype);
+        }
+
+        return determineIconIdByMimeTypeList(possibleMimeTypes);
+    }
+
+    /**
+     * Returns the resource identifier of an image to use as icon associated to a type of folder.
+     *
+     * @param isSharedViaUsers flag if the folder is shared via the users system
+     * @param isSharedViaLink flag if the folder is publicly shared via link
+     * @return Identifier of an image resource.
+     */
+    public static int getFolderTypeIconId(boolean isSharedViaUsers, boolean isSharedViaLink) {
+        if (isSharedViaLink) {
+            return R.drawable.folder_public;
+        } else if (isSharedViaUsers) {
+            return R.drawable.shared_with_me_folder;
+        }
+
+        return R.drawable.ic_menu_archive;
+    }
+
+    /**
+     * Returns a single MIME type of all the possible, by inspection of the file extension, and taking
+     * into account the MIME types known by ownCloud first.
+     *
+     * @param filename      Name of file
+     * @return              A single MIME type, "application/octet-stream" for unknown file extensions.
+     */
+    public static String getBestMimeTypeByFilename(String filename) {
+        List<String> candidates = determineMimeTypesByFilename(filename);
+        if (candidates == null || candidates.size() < 1) {
+            return "application/octet-stream";
+        }
+        return candidates.get(0);
+    }
+
+    /**
+     * @return 'True' if the mime type defines image
+     */
+    public static boolean isImage(String mimeType) {
+        return (mimeType!=null && mimeType.toLowerCase().startsWith("image/") && !mimeType.toLowerCase().contains
+                ("djvu"));
+    }
+
+    /**
+     * @return 'True' the mime type defines video
+     */
+    public static boolean isVideo(String mimeType) {
+        return (mimeType != null && mimeType.toLowerCase().startsWith("video/"));
+    }
+
+    /**
+     * @return 'True' the mime type defines audio
+     */
+    public static boolean isAudio(String mimeType) {
+        return (mimeType != null && mimeType.toLowerCase().startsWith("audio/"));
+    }
+
+    /**
+     * @return 'True' if mime type defines text
+     */
+    public static boolean isText(String mimeType) {
+        return (mimeType != null && mimeType.toLowerCase().startsWith("text/"));
+    }
+
+    /**
+     * Checks if file passed is a video.
+     *
+     * @param file the file to be checked
+     * @return 'True' the mime type defines video
+     */
+    public static boolean isVideo(File file) {
+        return isVideo(extractMimeType(file));
+    }
+
+    /**
+     * Checks if file passed is an image.
+     *
+     * @param file the file to be checked
+     * @return 'True' the mime type defines video
+     */
+    public static boolean isImage(File file) {
+        return isImage(extractMimeType(file));
+    }
+
+    /**
+     * @param file the file to be analyzed
+     * @return 'True' if the file contains audio
+     */
+    public static boolean isAudio(OCFile file) {
+        return MimeTypeUtil.isAudio(file.getMimetype());
+    }
+
+    /**
+     * @param file the file to be analyzed
+     * @return 'True' if the file contains video
+     */
+    public static boolean isVideo(OCFile file) {
+        return MimeTypeUtil.isVideo(file.getMimetype());
+    }
+
+    /**
+     * @param file the file to be analyzed
+     * @return 'True' if the file contains an image
+     */
+    public static boolean isImage(OCFile file) {
+        return (MimeTypeUtil.isImage(file.getMimetype())
+                || MimeTypeUtil.isImage(getMimeTypeFromPath(file.getRemotePath())));
+    }
+
+    /**
+     * @param file the file to be analyzed
+     * @return 'True' if the file is simple text (e.g. not application-dependent, like .doc or .docx)
+     */
+    public static boolean isText(OCFile file) {
+        return (MimeTypeUtil.isText(file.getMimetype())
+                || MimeTypeUtil.isText(getMimeTypeFromPath(file.getRemotePath())));
+    }
+
+    /**
+     * Extracts the mime type for the given file.
+     *
+     * @param file the file to be analyzed
+     * @return the file's mime type
+     */
+    private static String extractMimeType(File file) {
+        Uri selectedUri = Uri.fromFile(file);
+        String fileExtension = MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString().toLowerCase());
+        return MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
+    }
+
+    /**
+     * determines the icon based on the mime type.
+     *
+     * @param mimetypes the mimetypes
+     * @return the icon id, R.drawable.file if the mime type could not be matched at all or was {@code null}
+     */
+    private static int determineIconIdByMimeTypeList(List<String> mimetypes) {
+        // no mime type leads to file
+        if (mimetypes == null || mimetypes.size() < 1) {
+            return R.drawable.file;
+        } else {
+
+            // search for full mime type mapping
+            for (String mimetype : mimetypes) {
+                Integer iconId = MIMETYPE_TO_ICON_MAPPING.get(mimetype);
+
+                if (iconId != null) {
+                    return iconId;
+                }
+            }
+
+            // fallback to main mime type part mapping
+            for (String mimetype : mimetypes) {
+                String mainMimetypePart = mimetype.split("/")[0];
+
+                Integer iconId = MAINMIMETYPE_TO_ICON_MAPPING.get(mainMimetypePart);
+                if (iconId != null) {
+                    return iconId;
+                }
+            }
+        }
+
+        // no match found at all, falling back to file
+        return R.drawable.file;
+    }
+
+    /**
+     * determines the list of possible mime types for the given file, based on its extension.
+     *
+     * @param filename the file name
+     * @return list of possible mime types (ordered), empty list in case no mime types found
+     */
+    private static List<String> determineMimeTypesByFilename(String filename) {
+        String fileExtension = getExtension(filename);
+
+        // try detecting the mimetype based on the web app logic equivalent
+        List<String> mimeTypeList = FILE_EXTENSION_TO_MIMETYPE_MAPPING.get(fileExtension);
+        if (mimeTypeList != null && mimeTypeList.size() > 0) {
+            return mimeTypeList;
+        } else {
+            // try detecting the mime type via android itself
+            String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
+            if (mimeType != null) {
+                return Collections.singletonList(mimeType);
+            } else {
+                return new ArrayList<>();
+            }
+        }
+    }
+
+    public static String getMimeTypeFromPath(String path) {
+        String extension = "";
+        int pos = path.lastIndexOf('.');
+        if (pos >= 0) {
+            extension = path.substring(pos + 1);
+        }
+        String result = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension.toLowerCase());
+        return (result != null) ? result : "";
+    }
+
+    /**
+     * provides the file extension of a given filename.
+     *
+     * @param filename the filename
+     * @return the file extension
+     */
+    private static String getExtension(String filename) {
+        return filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
+    }
+
+    /**
+     * populates the mapping list:  full mime type --> icon.
+     */
+    private static void populateMimeTypeIconMapping() {
+        MIMETYPE_TO_ICON_MAPPING.put("application/coreldraw", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/epub+zip", R.drawable.file_text);
+        MIMETYPE_TO_ICON_MAPPING.put("application/font-sfnt", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/font-woff", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/illustrator", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/javascript", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/json", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/msaccess", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("application/msexcel", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/mspowerpoint", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/msword", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/octet-stream", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("application/postscript", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/pdf", R.drawable.file_pdf);
+        MIMETYPE_TO_ICON_MAPPING.put("application/rss+xml", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/rtf", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.android.package-archive", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.addin.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.sheet.binary.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.sheet.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-excel.template.macroEnabled.12", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-fontobject", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.addin.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.presentation.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.slideshow.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-powerpoint.template.macroEnabled.12", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-word.document.macroEnabled.12", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.ms-word.template.macroEnabled.12", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.presentation", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.presentation-template", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.spreadsheet", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.spreadsheet-template", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-master", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-template", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.oasis.opendocument.text-web", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.presentation", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.slideshow", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.presentationml.template", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.spreadsheetml.template", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.wordprocessingml.document", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/vnd.openxmlformats-officedocument.wordprocessingml.template", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-7z-compressed", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-bin", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-cbr", R.drawable.file_text);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-compressed", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-dcraw", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-deb", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-font", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-gimp", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-gzip", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-ms-dos-executable", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-msi", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-numbers-sffnumbers", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-keynote-sffkey", R.drawable.file_ppt);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-iwork-pages-sffpages", R.drawable.file_doc);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-perl", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-photoshop", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-php", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-rar-compressed", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-shockwave-flash", R.drawable.file_application);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-tar", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("application/x-tex", R.drawable.file_text);
+        MIMETYPE_TO_ICON_MAPPING.put("application/xml", R.drawable.file_text);
+        MIMETYPE_TO_ICON_MAPPING.put("application/yaml", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("application/zip", R.drawable.file_zip);
+        MIMETYPE_TO_ICON_MAPPING.put("database", R.drawable.file);
+        MIMETYPE_TO_ICON_MAPPING.put("httpd/unix-directory", R.drawable.ic_menu_archive);
+        MIMETYPE_TO_ICON_MAPPING.put("image/svg+xml", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("image/vector", R.drawable.file_image);
+        MIMETYPE_TO_ICON_MAPPING.put("text/calendar", R.drawable.file_calendar);
+        MIMETYPE_TO_ICON_MAPPING.put("text/css", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/csv", R.drawable.file_xls);
+        MIMETYPE_TO_ICON_MAPPING.put("text/html", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/vcard", R.drawable.file_vcard);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-c", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-c++src", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-h", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-python", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("text/x-shellscript", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put("web", R.drawable.file_code);
+        MIMETYPE_TO_ICON_MAPPING.put(MimeType.DIRECTORY, R.drawable.ic_menu_archive);
+    }
+
+    /**
+     * populates the mapping list: main mime type --> icon.
+     */
+    private static void populateMainMimeTypeMapping() {
+        MAINMIMETYPE_TO_ICON_MAPPING.put("audio", R.drawable.file_sound);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("database", R.drawable.file);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("httpd", R.drawable.file_zip);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("image", R.drawable.file_image);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("text", R.drawable.file_text);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("video", R.drawable.file_movie);
+        MAINMIMETYPE_TO_ICON_MAPPING.put("web", R.drawable.file_code);
+    }
+
+    /**
+     * populates the mapping list: file extension --> mime type.
+     */
+    private static void populateFileExtensionMimeTypeMapping() {
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("3gp", Collections.singletonList("video/3gpp"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("7z", Collections.singletonList("application/x-7z-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("accdb", Collections.singletonList("application/msaccess"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ai", Collections.singletonList("application/illustrator"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("apk", Collections.singletonList("application/vnd.android.package-archive"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("arw", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("avi", Collections.singletonList("video/x-msvideo"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bash", Collections.singletonList("text/x-shellscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("blend", Collections.singletonList("application/x-blender"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bin", Collections.singletonList("application/x-bin"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bmp", Collections.singletonList("image/bmp"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("bpg", Collections.singletonList("image/bpg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cb7", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cba", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbr", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbt", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbtc", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cbz", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cc", Collections.singletonList("text/x-c"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cdr", Collections.singletonList("application/coreldraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cnf", Collections.singletonList("text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("conf", Collections.singletonList("text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cpp", Collections.singletonList("text/x-c++src"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cr2", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("css", Collections.singletonList("text/css"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("csv", Collections.singletonList("text/csv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("cvbdl", Collections.singletonList("application/x-cbr"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("c", Collections.singletonList("text/x-c"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("c++", Collections.singletonList("text/x-c++src"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dcr", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("deb", Collections.singletonList("application/x-deb"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dng", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("doc", Collections.singletonList("application/msword"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("docm", Collections.singletonList("application/vnd.ms-word.document.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("docx", Collections.singletonList("application/vnd.openxmlformats-officedocument.wordprocessingml.document"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dot", Collections.singletonList("application/msword"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dotx", Collections.singletonList("application/vnd.openxmlformats-officedocument.wordprocessingml.template"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("dv", Collections.singletonList("video/dv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("eot", Collections.singletonList("application/vnd.ms-fontobject"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("epub", Collections.singletonList("application/epub+zip"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("eps", Collections.singletonList("application/postscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("erf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("exe", Collections.singletonList("application/x-ms-dos-executable"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("flac", Collections.singletonList("audio/flac"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("flv", Collections.singletonList("video/x-flv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gif", Collections.singletonList("image/gif"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gz", Collections.singletonList("application/x-gzip"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gzip", Collections.singletonList("application/x-gzip"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("h", Collections.singletonList("text/x-h"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("hh", Collections.singletonList("text/x-h"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("html", Arrays.asList("text/html", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("htm", Arrays.asList("text/html", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ical", Collections.singletonList("text/calendar"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ics", Collections.singletonList("text/calendar"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("iiq", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("impress", Collections.singletonList("text/impress"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jpeg", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jpg", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("jps", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("js", Arrays.asList("application/javascript", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("json", Arrays.asList("application/json", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("k25", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("kdc", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("key", Collections.singletonList("application/x-iwork-keynote-sffkey"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("keynote", Collections.singletonList("application/x-iwork-keynote-sffkey"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("kra", Collections.singletonList("application/x-krita"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("m2t", Collections.singletonList("video/mp2t"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("m4v", Collections.singletonList("video/mp4"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("markdown", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdown", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("md", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdb", Collections.singletonList("application/msaccess"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mdwn", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mkd", Collections.singletonList("text/markdown"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mef", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mkv", Collections.singletonList("video/x-matroska"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mobi", Collections.singletonList("application/x-mobipocket-ebook"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mov", Collections.singletonList("video/quicktime"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mp3", Collections.singletonList("audio/mpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mp4", Collections.singletonList("video/mp4"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpeg", Collections.singletonList("video/mpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpg", Collections.singletonList("video/mpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mpo", Collections.singletonList("image/jpeg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("msi", Collections.singletonList("application/x-msi"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mts", Collections.singletonList("video/MP2T"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("mt2s", Collections.singletonList("video/MP2T"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("nef", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("numbers", Collections.singletonList("application/x-iwork-numbers-sffnumbers"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odf", Collections.singletonList("application/vnd.oasis.opendocument.formula"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odg", Collections.singletonList("application/vnd.oasis.opendocument.graphics"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odp", Collections.singletonList("application/vnd.oasis.opendocument.presentation"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ods", Collections.singletonList("application/vnd.oasis.opendocument.spreadsheet"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("odt", Collections.singletonList("application/vnd.oasis.opendocument.text"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("oga", Collections.singletonList("audio/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ogg", Collections.singletonList("audio/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ogv", Collections.singletonList("video/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("opus", Collections.singletonList("audio/ogg"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("orf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("otf", Collections.singletonList("application/font-sfnt"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pages", Collections.singletonList("application/x-iwork-pages-sffpages"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pdf", Collections.singletonList("application/pdf"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pfb", Collections.singletonList("application/x-font"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pef", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("php", Collections.singletonList("application/x-php"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pl", Collections.singletonList("application/x-perl"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("png", Collections.singletonList("image/png"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pot", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("potm", Collections.singletonList("application/vnd.ms-powerpoint.template.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("potx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.template"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppa", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppam", Collections.singletonList("application/vnd.ms-powerpoint.addin.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pps", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppsm", Collections.singletonList("application/vnd.ms-powerpoint.slideshow.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppsx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.slideshow"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ppt", Collections.singletonList("application/vnd.ms-powerpoint"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pptm", Collections.singletonList("application/vnd.ms-powerpoint.presentation.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("pptx", Collections.singletonList("application/vnd.openxmlformats-officedocument.presentationml.presentation"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ps", Collections.singletonList("application/postscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("psd", Collections.singletonList("application/x-photoshop"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("py", Collections.singletonList("text/x-python"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("raf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rar", Collections.singletonList("application/x-rar-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("reveal", Collections.singletonList("text/reveal"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rtf", Collections.singletonList("application/rtf"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("rw2", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sgf", Collections.singletonList("application/sgf"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sh-lib", Collections.singletonList("text/x-shellscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sh", Collections.singletonList("text/x-shellscript"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("srf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("sr2", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("svg", Arrays.asList("image/svg+xml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("swf", Arrays.asList("application/x-shockwave-flash", "application/octet-stream"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tar", Collections.singletonList("application/x-tar"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("gz", Collections.singletonList("application/x-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tex", Collections.singletonList("application/x-tex"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tgz", Collections.singletonList("application/x-compressed"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tiff", Collections.singletonList("image/tiff"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("tif", Collections.singletonList("image/tiff"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("ttf", Collections.singletonList("application/font-sfnt"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("txt", Collections.singletonList("text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vcard", Collections.singletonList("text/vcard"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vcf", Collections.singletonList("text/vcard"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("vob", Collections.singletonList("video/dvd"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("wav", Collections.singletonList("audio/wav"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("webm", Collections.singletonList("video/webm"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("woff", Collections.singletonList("application/font-woff"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("wmv", Collections.singletonList("video/x-ms-wmv"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xcf", Collections.singletonList("application/x-gimp"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xla", Collections.singletonList("application/vnd.ms-excel"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlam", Collections.singletonList("application/vnd.ms-excel.addin.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xls", Collections.singletonList("application/vnd.ms-excel"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsb", Collections.singletonList("application/vnd.ms-excel.sheet.binary.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsm", Collections.singletonList("application/vnd.ms-excel.sheet.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlsx", Collections.singletonList("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xlt", Collections.singletonList("application/vnd.ms-excel"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xltm", Collections.singletonList("application/vnd.ms-excel.template.macroEnabled.12"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xltx", Collections.singletonList("application/vnd.openxmlformats-officedocument.spreadsheetml.template"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xml", Arrays.asList("application/xml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("xrf", Collections.singletonList("image/x-dcraw"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("yaml", Arrays.asList("application/yaml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("yml", Arrays.asList("application/yaml", "text/plain"));
+        FILE_EXTENSION_TO_MIMETYPE_MAPPING.put("zip", Collections.singletonList("application/zip"));
+    }
+}