Merge "Move default MimeMap implementation to frameworks." am: 19c3bdc8

    jarjar_rules: ":framework-jarjar-rules",

    static_libs: [

        "mimemap",

        "apex_aidl_interface-java",

        "suspend_control_aidl_interface-java",

        "framework-protos",

import android.app.ActivityManager;

import android.app.ActivityThread;

import android.app.ApplicationErrorReport;

import android.content.type.MimeMapImpl;

import android.os.Build;

import android.os.DeadObjectException;

import android.os.Debug;

import com.android.server.NetworkManagementSocketTagger;

import dalvik.system.RuntimeHooks;

import dalvik.system.VMRuntime;

import libcore.net.MimeMap;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

         */

        RuntimeHooks.setTimeZoneIdSupplier(() -> SystemProperties.get("persist.sys.timezone"));

        /*

         * Set a default mapping between MIME types and file extensions.

         */

        MimeMap.setDefault(MimeMapImpl.createDefaultInstance());

        /*

         * Sets handler for java.util.logging to use Android log facilities.

         * The odd "new instance-and-then-throw-away" is a mirror of how

// Copyright (C) 2019 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.

java_library {

    name: "mimemap",

    visibility: [

        "//cts/tests/tests/mimemap:__subpackages__",

        "//frameworks/base:__subpackages__",

    ],

    srcs: [

        "java/android/content/type/MimeMapImpl.java",

    ],

    java_resources: [

        ":debian.mime.types",

        ":android.mime.types",

    ],

    sdk_version: "core_platform",

}

filegroup {

    name: "android.mime.types",

    visibility: [

        "//visibility:private",

    ],

    path: "java-res/",

    srcs: [

        "java-res/android.mime.types",

    ],

}

###############################################################################

#

# Android-specific MIME type <-> extension mappings

#

# Each line below defines an mapping from one MIME type to the first of the

# listed extensions, and from listed extension back to the MIME type.

# A mapping overrides any previous mapping _from_ that same MIME type or

# extension (put() semantics), unless that MIME type / extension is prefixed with '?'

# (putIfAbsent() semantics).

#

#

###############################################################################

#

# EXAMPLES

#

# A line of the form:

#

#    ?mime ext1 ?ext2 ext3

#

# affects the current mappings along the lines of the following pseudo code:

#

#    mimeToExt.putIfAbsent("mime", "ext1");

#    extToMime.put("ext1", "mime");

#    extToMime.putIfAbsent("ext2", "mime");

#    extToMime.put("ext3", "mime");

#

# The line:

#

#     ?text/plain txt

#

# leaves any earlier mapping for "text/plain" untouched, or maps that MIME type

# to the file extension ".txt" if there is no earlier mapping. The line also

# sets the mapping from file extension ".txt" to be the MIME type "text/plain",

# regardless of whether a previous mapping existed.

#

###############################################################################

# File extensions that Android wants to override to point to the given MIME type.

#

# After processing a line of the form:

# ?<mimeType> <extension1> <extension2>

# If <mimeType> was not already mapped to an extension then it will be

# mapped to <extension1>.

# <extension1> and <extension2> are mapped (or remapped) to <mimeType>.

?application/epub+zip epub

?application/pkix-cert cer

?application/rss+xml rss

?application/vnd.android.ota ota

?application/vnd.apple.mpegurl m3u8

?application/vnd.ms-pki.stl stl

?application/vnd.ms-powerpoint pot

?application/vnd.ms-wpl wpl

?application/vnd.stardivision.impress sdp

?application/vnd.stardivision.writer vor

?application/vnd.youtube.yt yt

?application/x-android-drm-fl fl

?application/x-flac flac

?application/x-font pcf

?application/x-mpegurl m3u m3u8

?application/x-pem-file pem

?application/x-pkcs12 p12 pfx

?application/x-webarchive webarchive

?application/x-webarchive-xml webarchivexml

?application/x-x509-server-cert crt

?application/x-x509-user-cert crt

?audio/3gpp 3gpp

?audio/aac-adts aac

?audio/imelody imy

?audio/midi rtttl xmf

?audio/mobile-xmf mxmf

?audio/mp4 m4a

?audio/mpegurl m3u

?audio/sp-midi smf

?audio/x-matroska mka

?audio/x-pn-realaudio ra

?image/bmp bmp

?image/heic heic

?image/heic-sequence heics

?image/heif heif hif

?image/heif-sequence heifs

?image/ico cur

?image/webp webp

?image/x-adobe-dng dng

?image/x-fuji-raf raf

?image/x-icon ico

?image/x-nikon-nrw nrw

?image/x-panasonic-rw2 rw2

?image/x-pentax-pef pef

?image/x-samsung-srw srw

?image/x-sony-arw arw

?text/comma-separated-values csv

?text/plain diff po

?text/rtf rtf

?text/text phps

?text/xml xml

?text/x-vcard vcf

?video/3gpp2 3gpp2 3g2

?video/3gpp 3gpp

?video/avi avi

?video/m4v m4v

?video/mp2p mpeg

?video/mp2t m2ts mts

?video/mp2ts ts

?video/vnd.youtube.yt yt

?video/x-webex wrf

# Optional additions that should not override any previous mapping.

?application/x-wifi-config ?xml

# Special cases where Android has a strong opinion about mappings, so we

# define them very last and make them override in both directions (no "?").

#

# Lines here are of the form:

# <mimeType> <extension1> <extension2> ...

#

# After processing each line,

#   <mimeType> is mapped to <extension1>

#   <extension1>, <extension2>, ... are all mapped to <mimeType>

# This overrides any mappings for this <mimeType> / for these extensions

# that may have been defined earlier.

application/pgp-signature pgp

application/x-x509-ca-cert crt

audio/aac aac

audio/basic snd

audio/flac flac

audio/midi rtx

audio/mpeg mp3 m4a m4r

audio/x-mpegurl m3u m3u8

image/jpeg jpg

image/x-ms-bmp bmp

text/plain txt

text/x-c++hdr hpp

text/x-c++src cpp

video/3gpp 3gpp

video/mpeg mpeg

video/quicktime mov

video/x-matroska mkv

/*

 * Copyright (C) 2019 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 android.content.type;

import libcore.net.MimeMap;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.regex.Pattern;

/**

 * Default implementation of {@link MimeMap}, a bidirectional mapping between

 * MIME types and file extensions.

 *

 * This default mapping is loaded from data files that start with some mappings

 * recognized by IANA plus some custom extensions and overrides.

 *

 * @hide

 */

public class MimeMapImpl extends MimeMap {

    /**

     * Creates and returns a new {@link MimeMapImpl} instance that implements.

     * Android's default mapping between MIME types and extensions.

     */

    public static MimeMapImpl createDefaultInstance() {

        return parseFromResources("/mime.types", "/android.mime.types");

    }

    private static final Pattern SPLIT_PATTERN = Pattern.compile("\\s+");

    /**

     * Note: These maps only contain lowercase keys/values, regarded as the

     * {@link #toLowerCase(String) canonical form}.

     *

     * <p>This is the case for both extensions and MIME types. The mime.types

     * data file contains examples of mixed-case MIME types, but some applications

     * use the lowercase version of these same types. RFC 2045 section 2 states

     * that MIME types are case insensitive.

     */

    private final Map<String, String> mMimeTypeToExtension;

    private final Map<String, String> mExtensionToMimeType;

    public MimeMapImpl(Map<String, String> mimeTypeToExtension,

            Map<String, String> extensionToMimeType) {

        this.mMimeTypeToExtension = new HashMap<>(mimeTypeToExtension);

        for (Map.Entry<String, String> entry : mimeTypeToExtension.entrySet()) {

            checkValidMimeType(entry.getKey());

            checkValidExtension(entry.getValue());

        }

        this.mExtensionToMimeType = new HashMap<>(extensionToMimeType);

        for (Map.Entry<String, String> entry : extensionToMimeType.entrySet()) {

            checkValidExtension(entry.getKey());

            checkValidMimeType(entry.getValue());

        }

    }

    private static void checkValidMimeType(String s) {

        if (MimeMap.isNullOrEmpty(s) || !s.equals(MimeMap.toLowerCase(s))) {

            throw new IllegalArgumentException("Invalid MIME type: " + s);

        }

    }

    private static void checkValidExtension(String s) {

        if (MimeMap.isNullOrEmpty(s) || !s.equals(MimeMap.toLowerCase(s))) {

            throw new IllegalArgumentException("Invalid extension: " + s);

        }

    }

    static MimeMapImpl parseFromResources(String... resourceNames) {

        Map<String, String> mimeTypeToExtension = new HashMap<>();

        Map<String, String> extensionToMimeType = new HashMap<>();

        for (String resourceName : resourceNames) {

            parseTypes(mimeTypeToExtension, extensionToMimeType, resourceName);

        }

        return new MimeMapImpl(mimeTypeToExtension, extensionToMimeType);

    }

    /**

     * An element of a *mime.types file: A MIME type or an extension, with an optional

     * prefix of "?" (if not overriding an earlier value).

     */

    private static class Element {

        public final boolean keepExisting;

        public final String s;

        Element(boolean keepExisting, String value) {

            this.keepExisting = keepExisting;

            this.s = toLowerCase(value);

            if (value.isEmpty()) {

                throw new IllegalArgumentException();

            }

        }

        public String toString() {

            return keepExisting ? ("?" + s) : s;

        }

    }

    private static String maybePut(Map<String, String> map, Element keyElement, String value) {

        if (keyElement.keepExisting) {

            return map.putIfAbsent(keyElement.s, value);

        } else {

            return map.put(keyElement.s, value);

        }

    }

    private static void parseTypes(Map<String, String> mimeTypeToExtension,

            Map<String, String> extensionToMimeType, String resource) {

        try (BufferedReader r = new BufferedReader(

                new InputStreamReader(MimeMapImpl.class.getResourceAsStream(resource)))) {

            String line;

            while ((line = r.readLine()) != null) {

                int commentPos = line.indexOf('#');

                if (commentPos >= 0) {

                    line = line.substring(0, commentPos);

                }

                line = line.trim();

                // The first time a MIME type is encountered it is mapped to the first extension

                // listed in its line. The first time an extension is encountered it is mapped

                // to the MIME type.

                //

                // When encountering a previously seen MIME type or extension, then by default

                // the later ones override earlier mappings (put() semantics); however if a MIME

                // type or extension is prefixed with '?' then any earlier mapping _from_ that

                // MIME type / extension is kept (putIfAbsent() semantics).

                final String[] split = SPLIT_PATTERN.split(line);

                if (split.length <= 1) {

                    // Need mimeType + at least one extension to make a mapping.

                    // "mime.types" files may also contain lines with just a mimeType without

                    // an extension but we skip them as they provide no mapping info.

                    continue;

                }

                List<Element> lineElements = new ArrayList<>(split.length);

                for (String s : split) {

                    boolean keepExisting = s.startsWith("?");

                    if (keepExisting) {

                        s = s.substring(1);

                    }

                    if (s.isEmpty()) {

                        throw new IllegalArgumentException("Invalid entry in '" + line + "'");

                    }

                    lineElements.add(new Element(keepExisting, s));

                }

                // MIME type -> first extension (one mapping)

                // This will override any earlier mapping from this MIME type to another

                // extension, unless this MIME type was prefixed with '?'.

                Element mimeElement = lineElements.get(0);

                List<Element> extensionElements = lineElements.subList(1, lineElements.size());

                String firstExtension = extensionElements.get(0).s;

                maybePut(mimeTypeToExtension, mimeElement, firstExtension);

                // extension -> MIME type (one or more mappings).

                // This will override any earlier mapping from this extension to another

                // MIME type, unless this extension was prefixed with '?'.

                for (Element extensionElement : extensionElements) {

                    maybePut(extensionToMimeType, extensionElement, mimeElement.s);

                }

            }

        } catch (IOException | RuntimeException e) {

            throw new RuntimeException("Failed to parse " + resource, e);

        }

    }

    @Override

    protected String guessExtensionFromLowerCaseMimeType(String mimeType) {

        return mMimeTypeToExtension.get(mimeType);

    }

    @Override

    protected String guessMimeTypeFromLowerCaseExtension(String extension) {

        return mExtensionToMimeType.get(extension);

    }

}