From 0c8f903eb6bdde00253ab76de5a14936a31b9168 Mon Sep 17 00:00:00 2001 From: Grishka Date: Fri, 23 Feb 2024 13:25:21 -0300 Subject: [PATCH] Share sheet previews (AND-139) --- mastodon/src/main/AndroidManifest.xml | 8 + .../joinmastodon/android/FileProvider.java | 841 ++++++++++++++++++ .../android/TweakedFileProvider.java | 38 + .../android/fragments/ProfileFragment.java | 5 +- .../displayitems/FooterStatusDisplayItem.java | 5 +- .../displayitems/HeaderStatusDisplayItem.java | 2 +- .../android/ui/utils/UiUtils.java | 47 +- .../ui/viewholders/AccountViewHolder.java | 5 +- .../src/main/res/xml/fileprovider_paths.xml | 4 + 9 files changed, 941 insertions(+), 14 deletions(-) create mode 100644 mastodon/src/main/java/org/joinmastodon/android/FileProvider.java create mode 100644 mastodon/src/main/java/org/joinmastodon/android/TweakedFileProvider.java create mode 100644 mastodon/src/main/res/xml/fileprovider_paths.xml diff --git a/mastodon/src/main/AndroidManifest.xml b/mastodon/src/main/AndroidManifest.xml index 422cb8b98a..08ab4ec893 100644 --- a/mastodon/src/main/AndroidManifest.xml +++ b/mastodon/src/main/AndroidManifest.xml @@ -115,6 +115,14 @@ android:resource="@xml/file_paths" /> + + + + \ No newline at end of file diff --git a/mastodon/src/main/java/org/joinmastodon/android/FileProvider.java b/mastodon/src/main/java/org/joinmastodon/android/FileProvider.java new file mode 100644 index 0000000000..4c4965294a --- /dev/null +++ b/mastodon/src/main/java/org/joinmastodon/android/FileProvider.java @@ -0,0 +1,841 @@ +/* + * Copyright (C) 2013 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 org.joinmastodon.android; + +import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT; +import static org.xmlpull.v1.XmlPullParser.START_TAG; + +import android.content.ClipData; +import android.content.ContentProvider; +import android.content.ContentValues; +import android.content.Context; +import android.content.Intent; +import android.content.pm.PackageManager; +import android.content.pm.ProviderInfo; +import android.content.res.XmlResourceParser; +import android.database.Cursor; +import android.database.MatrixCursor; +import android.net.Uri; +import android.os.Build; +import android.os.Bundle; +import android.os.Environment; +import android.os.ParcelFileDescriptor; +import android.provider.OpenableColumns; +import android.text.TextUtils; +import android.webkit.MimeTypeMap; + +import androidx.annotation.GuardedBy; +import androidx.annotation.NonNull; +import androidx.annotation.Nullable; + +import org.xmlpull.v1.XmlPullParserException; + +import java.io.File; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; + +/** + * FileProvider is a special subclass of {@link ContentProvider} that facilitates secure sharing + * of files associated with an app by creating a content:// {@link Uri} for a file + * instead of a file:/// {@link Uri}. + *

+ * A content URI allows you to grant read and write access using + * temporary access permissions. When you create an {@link Intent} containing + * a content URI, in order to send the content URI + * to a client app, you can also call {@link Intent#setFlags(int) Intent.setFlags()} to add + * permissions. These permissions are available to the client app for as long as the stack for + * a receiving {@link android.app.Activity} is active. For an {@link Intent} going to a + * {@link android.app.Service}, the permissions are available as long as the + * {@link android.app.Service} is running. + *

+ * In comparison, to control access to a file:/// {@link Uri} you have to modify the + * file system permissions of the underlying file. The permissions you provide become available to + * any app, and remain in effect until you change them. This level of access is + * fundamentally insecure. + *

+ * The increased level of file access security offered by a content URI + * makes FileProvider a key part of Android's security infrastructure. + *

+ * This overview of FileProvider includes the following topics: + *

+ *
    + *
  1. Defining a FileProvider
    2. + *
  2. Specifying Available Files
    3. + *
  3. Retrieving the Content URI for a File
    4. + *
  4. Granting Temporary Permissions to a URI
    5. + *
  5. Serving a Content URI to Another App
    6. + *
+ *

Defining a FileProvider

+ *

+ * Since the default functionality of FileProvider includes content URI generation for files, you + * don't need to define a subclass in code. Instead, you can include a FileProvider in your app + * by specifying it entirely in XML. To specify the FileProvider component itself, add a + * <provider> + * element to your app manifest. Set the android:name attribute to + * androidx.core.content.FileProvider. Set the android:authorities + * attribute to a URI authority based on a domain you control; for example, if you control the + * domain mydomain.com you should use the authority + * com.mydomain.fileprovider. Set the android:exported attribute to + * false; the FileProvider does not need to be public. Set the + * android:grantUriPermissions attribute to true, to allow you + * to grant temporary access to files. For example: + * 

+ *<manifest>
+ *    ...
+ *    <application>
+ *        ...
+ *        <provider
+ *            android:name="androidx.core.content.FileProvider"
+ *            android:authorities="com.mydomain.fileprovider"
+ *            android:exported="false"
+ *            android:grantUriPermissions="true">
+ *            ...
+ *        </provider>
+ *        ...
+ *    </application>
+ *</manifest>
+ *

+ * If you want to override any of the default behavior of FileProvider methods, extend + * the FileProvider class and use the fully-qualified class name in the android:name + * attribute of the <provider> element. + *

Specifying Available Files

+ * A FileProvider can only generate a content URI for files in directories that you specify + * beforehand. To specify a directory, specify the its storage area and path in XML, using child + * elements of the <paths> element. + * For example, the following paths element tells FileProvider that you intend to + * request content URIs for the images/ subdirectory of your private file area. + * 
+ *<paths xmlns:android="http://schemas.android.com/apk/res/android">
+ *    <files-path name="my_images" path="images/"/>
+ *    ...
+ *</paths>
+ *
+ *

+ * The <paths> element must contain one or more of the following child elements: + *

+ *
+ *
+ * 
+ *<files-path name="name" path="path" />
+ *
+ *
+ *
+ * Represents files in the files/ subdirectory of your app's internal storage + * area. This subdirectory is the same as the value returned by {@link Context#getFilesDir() + * Context.getFilesDir()}. + *
+ *
+ * 
+ *<cache-path name="name" path="path" />
+ *
+ *
+ *
+ * Represents files in the cache subdirectory of your app's internal storage area. The root path + * of this subdirectory is the same as the value returned by {@link Context#getCacheDir() + * getCacheDir()}. + *
+ *
+ * 
+ *<external-path name="name" path="path" />
+ *
+ *
+ *
+ * Represents files in the root of the external storage area. The root path of this subdirectory + * is the same as the value returned by + * {@link Environment#getExternalStorageDirectory() Environment.getExternalStorageDirectory()}. + *
+ *
+ * 
+ *<external-files-path name="name" path="path" />
+ *
+ *
+ *
+ * Represents files in the root of your app's external storage area. The root path of this + * subdirectory is the same as the value returned by + * {@code Context#getExternalFilesDir(String) Context.getExternalFilesDir(null)}. + *
+ *
+ * 
+ *<external-cache-path name="name" path="path" />
+ *
+ *
+ *
+ * Represents files in the root of your app's external cache area. The root path of this + * subdirectory is the same as the value returned by + * {@link Context#getExternalCacheDir() Context.getExternalCacheDir()}. + *
+ *
+ * 
+ *<external-media-path name="name" path="path" />
+ *
+ *
+ *
+ * Represents files in the root of your app's external media area. The root path of this + * subdirectory is the same as the value returned by the first result of + * {@link Context#getExternalMediaDirs() Context.getExternalMediaDirs()}. + *

Note: this directory is only available on API 21+ devices.

+ *
+ *
+ *

+ * These child elements all use the same attributes: + *

+ *
+ *
+ * name="name" + *
+ *
+ * A URI path segment. To enforce security, this value hides the name of the subdirectory + * you're sharing. The subdirectory name for this value is contained in the + * path attribute. + *
+ *
+ * path="path" + *
+ *
+ * The subdirectory you're sharing. While the name attribute is a URI path + * segment, the path value is an actual subdirectory name. Notice that the + * value refers to a subdirectory, not an individual file or files. You can't + * share a single file by its file name, nor can you specify a subset of files using + * wildcards. + *
+ *
+ *

+ * You must specify a child element of <paths> for each directory that contains + * files for which you want content URIs. For example, these XML elements specify two directories: + * 

+ *<paths xmlns:android="http://schemas.android.com/apk/res/android">
+ *    <files-path name="my_images" path="images/"/>
+ *    <files-path name="my_docs" path="docs/"/>
+ *</paths>
+ *
+ *

+ * Put the <paths> element and its children in an XML file in your project. + * For example, you can add them to a new file called res/xml/file_paths.xml. + * To link this file to the FileProvider, add a + * <meta-data> element + * as a child of the <provider> element that defines the FileProvider. Set the + * <meta-data> element's "android:name" attribute to + * android.support.FILE_PROVIDER_PATHS. Set the element's "android:resource" attribute + * to @xml/file_paths (notice that you don't specify the .xml + * extension). For example: + * 

+ *<provider
+ *    android:name="androidx.core.content.FileProvider"
+ *    android:authorities="com.mydomain.fileprovider"
+ *    android:exported="false"
+ *    android:grantUriPermissions="true">
+ *    <meta-data
+ *        android:name="android.support.FILE_PROVIDER_PATHS"
+ *        android:resource="@xml/file_paths" />
+ *</provider>
+ *
+ *

Generating the Content URI for a File

+ *

+ * To share a file with another app using a content URI, your app has to generate the content URI. + * To generate the content URI, create a new {@link File} for the file, then pass the {@link File} + * to {@link #getUriForFile(Context, String, File) getUriForFile()}. You can send the content URI + * returned by {@link #getUriForFile(Context, String, File) getUriForFile()} to another app in an + * {@link Intent}. The client app that receives the content URI can open the file + * and access its contents by calling + * {@link android.content.ContentResolver#openFileDescriptor(Uri, String) + * ContentResolver.openFileDescriptor} to get a {@link ParcelFileDescriptor}. + *

+ * For example, suppose your app is offering files to other apps with a FileProvider that has the + * authority com.mydomain.fileprovider. To get a content URI for the file + * default_image.jpg in the images/ subdirectory of your internal storage + * add the following code: + * 

+ *File imagePath = new File(Context.getFilesDir(), "images");
+ *File newFile = new File(imagePath, "default_image.jpg");
+ *Uri contentUri = getUriForFile(getContext(), "com.mydomain.fileprovider", newFile);
+ *
+ * As a result of the previous snippet, + * {@link #getUriForFile(Context, String, File) getUriForFile()} returns the content URI + * content://com.mydomain.fileprovider/my_images/default_image.jpg. + *

Granting Temporary Permissions to a URI

+ * To grant an access permission to a content URI returned from + * {@link #getUriForFile(Context, String, File) getUriForFile()}, do one of the following: + * + *

Serving a Content URI to Another App

+ *

+ * There are a variety of ways to serve the content URI for a file to a client app. One common way + * is for the client app to start your app by calling + * {@link android.app.Activity#startActivityForResult(Intent, int, Bundle) startActivityResult()}, + * which sends an {@link Intent} to your app to start an {@link android.app.Activity} in your app. + * In response, your app can immediately return a content URI to the client app or present a user + * interface that allows the user to pick a file. In the latter case, once the user picks the file + * your app can return its content URI. In both cases, your app returns the content URI in an + * {@link Intent} sent via {@link android.app.Activity#setResult(int, Intent) setResult()}. + *

+ *

+ * You can also put the content URI in a {@link android.content.ClipData} object and then add the + * object to an {@link Intent} you send to a client app. To do this, call + * {@link Intent#setClipData(ClipData) Intent.setClipData()}. When you use this approach, you can + * add multiple {@link android.content.ClipData} objects to the {@link Intent}, each with its own + * content URI. When you call {@link Intent#setFlags(int) Intent.setFlags()} on the {@link Intent} + * to set temporary access permissions, the same permissions are applied to all of the content + * URIs. + *

+ *

+ * Note: The {@link Intent#setClipData(ClipData) Intent.setClipData()} method is + * only available in platform version 16 (Android 4.1) and later. If you want to maintain + * compatibility with previous versions, you should send one content URI at a time in the + * {@link Intent}. Set the action to {@link Intent#ACTION_SEND} and put the URI in data by calling + * {@link Intent#setData setData()}. + *

+ *

More Information

+ *

+ * To learn more about FileProvider, see the Android training class + * Sharing Files Securely with URIs. + *

+ */ +public class FileProvider extends ContentProvider { + private static final String[] COLUMNS = { + OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE }; + + private static final String + META_DATA_FILE_PROVIDER_PATHS = "android.support.FILE_PROVIDER_PATHS"; + + private static final String TAG_ROOT_PATH = "root-path"; + private static final String TAG_FILES_PATH = "files-path"; + private static final String TAG_CACHE_PATH = "cache-path"; + private static final String TAG_EXTERNAL = "external-path"; + private static final String TAG_EXTERNAL_FILES = "external-files-path"; + private static final String TAG_EXTERNAL_CACHE = "external-cache-path"; + private static final String TAG_EXTERNAL_MEDIA = "external-media-path"; + + private static final String ATTR_NAME = "name"; + private static final String ATTR_PATH = "path"; + + private static final File DEVICE_ROOT = new File("/"); + + @GuardedBy("sCache") + private static HashMap sCache = new HashMap(); + + private PathStrategy mStrategy; + + /** + * The default FileProvider implementation does not need to be initialized. If you want to + * override this method, you must provide your own subclass of FileProvider. + */ + @Override + public boolean onCreate() { + return true; + } + + /** + * After the FileProvider is instantiated, this method is called to provide the system with + * information about the provider. + * + * @param context A {@link Context} for the current component. + * @param info A {@link ProviderInfo} for the new provider. + */ + @Override + public void attachInfo(@NonNull Context context, @NonNull ProviderInfo info) { + super.attachInfo(context, info); + + // Sanity check our security + if (info.exported) { + throw new SecurityException("Provider must not be exported"); + } + if (!info.grantUriPermissions) { + throw new SecurityException("Provider must grant uri permissions"); + } + + mStrategy = getPathStrategy(context, info.authority); + } + + /** + * Return a content URI for a given {@link File}. Specific temporary + * permissions for the content URI can be set with + * {@link Context#grantUriPermission(String, Uri, int)}, or added + * to an {@link Intent} by calling {@link Intent#setData(Uri) setData()} and then + * {@link Intent#setFlags(int) setFlags()}; in both cases, the applicable flags are + * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION} and + * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION}. A FileProvider can only return a + * content {@link Uri} for file paths defined in their <paths> + * meta-data element. See the Class Overview for more information. + * + * @param context A {@link Context} for the current component. + * @param authority The authority of a {@link FileProvider} defined in a + * {@code } element in your app's manifest. + * @param file A {@link File} pointing to the filename for which you want a + * content {@link Uri}. + * @return A content URI for the file. + * @throws IllegalArgumentException When the given {@link File} is outside + * the paths supported by the provider. + */ + public static Uri getUriForFile(@NonNull Context context, @NonNull String authority, + @NonNull File file) { + final PathStrategy strategy = getPathStrategy(context, authority); + return strategy.getUriForFile(file); + } + + /** + * Use a content URI returned by + * {@link #getUriForFile(Context, String, File) getUriForFile()} to get information about a file + * managed by the FileProvider. + * FileProvider reports the column names defined in {@link OpenableColumns}: + *
    + *
  • {@link OpenableColumns#DISPLAY_NAME}
    • + *
  • {@link OpenableColumns#SIZE}
    • + *
+ * For more information, see + * {@link ContentProvider#query(Uri, String[], String, String[], String) + * ContentProvider.query()}. + * + * @param uri A content URI returned by {@link #getUriForFile}. + * @param projection The list of columns to put into the {@link Cursor}. If null all columns are + * included. + * @param selection Selection criteria to apply. If null then all data that matches the content + * URI is returned. + * @param selectionArgs An array of {@link String}, containing arguments to bind to + * the selection parameter. The query method scans selection from left to + * right and iterates through selectionArgs, replacing the current "?" character in + * selection with the value at the current position in selectionArgs. The + * values are bound to selection as {@link String} values. + * @param sortOrder A {@link String} containing the column name(s) on which to sort + * the resulting {@link Cursor}. + * @return A {@link Cursor} containing the results of the query. + * + */ + @Override + public Cursor query(@NonNull Uri uri, @Nullable String[] projection, @Nullable String selection, + @Nullable String[] selectionArgs, + @Nullable String sortOrder) { + // ContentProvider has already checked granted permissions + final File file = mStrategy.getFileForUri(uri); + + if (projection == null) { + projection = COLUMNS; + } + + String[] cols = new String[projection.length]; + Object[] values = new Object[projection.length]; + int i = 0; + for (String col : projection) { + if (OpenableColumns.DISPLAY_NAME.equals(col)) { + cols[i] = OpenableColumns.DISPLAY_NAME; + values[i++] = file.getName(); + } else if (OpenableColumns.SIZE.equals(col)) { + cols[i] = OpenableColumns.SIZE; + values[i++] = file.length(); + } + } + + cols = copyOf(cols, i); + values = copyOf(values, i); + + final MatrixCursor cursor = new MatrixCursor(cols, 1); + cursor.addRow(values); + return cursor; + } + + /** + * Returns the MIME type of a content URI returned by + * {@link #getUriForFile(Context, String, File) getUriForFile()}. + * + * @param uri A content URI returned by + * {@link #getUriForFile(Context, String, File) getUriForFile()}. + * @return If the associated file has an extension, the MIME type associated with that + * extension; otherwise application/octet-stream. + */ + @Override + public String getType(@NonNull Uri uri) { + // ContentProvider has already checked granted permissions + final File file = mStrategy.getFileForUri(uri); + + final int lastDot = file.getName().lastIndexOf('.'); + if (lastDot >= 0) { + final String extension = file.getName().substring(lastDot + 1); + final String mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension); + if (mime != null) { + return mime; + } + } + + return "application/octet-stream"; + } + + /** + * By default, this method throws an {@link UnsupportedOperationException}. You must + * subclass FileProvider if you want to provide different functionality. + */ + @Override + public Uri insert(@NonNull Uri uri, ContentValues values) { + throw new UnsupportedOperationException("No external inserts"); + } + + /** + * By default, this method throws an {@link UnsupportedOperationException}. You must + * subclass FileProvider if you want to provide different functionality. + */ + @Override + public int update(@NonNull Uri uri, ContentValues values, @Nullable String selection, + @Nullable String[] selectionArgs) { + throw new UnsupportedOperationException("No external updates"); + } + + /** + * Deletes the file associated with the specified content URI, as + * returned by {@link #getUriForFile(Context, String, File) getUriForFile()}. Notice that this + * method does not throw an {@link IOException}; you must check its return value. + * + * @param uri A content URI for a file, as returned by + * {@link #getUriForFile(Context, String, File) getUriForFile()}. + * @param selection Ignored. Set to {@code null}. + * @param selectionArgs Ignored. Set to {@code null}. + * @return 1 if the delete succeeds; otherwise, 0. + */ + @Override + public int delete(@NonNull Uri uri, @Nullable String selection, + @Nullable String[] selectionArgs) { + // ContentProvider has already checked granted permissions + final File file = mStrategy.getFileForUri(uri); + return file.delete() ? 1 : 0; + } + + /** + * By default, FileProvider automatically returns the + * {@link ParcelFileDescriptor} for a file associated with a content:// + * {@link Uri}. To get the {@link ParcelFileDescriptor}, call + * {@link android.content.ContentResolver#openFileDescriptor(Uri, String) + * ContentResolver.openFileDescriptor}. + * + * To override this method, you must provide your own subclass of FileProvider. + * + * @param uri A content URI associated with a file, as returned by + * {@link #getUriForFile(Context, String, File) getUriForFile()}. + * @param mode Access mode for the file. May be "r" for read-only access, "rw" for read and + * write access, or "rwt" for read and write access that truncates any existing file. + * @return A new {@link ParcelFileDescriptor} with which you can access the file. + */ + @Override + public ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode) + throws FileNotFoundException { + // ContentProvider has already checked granted permissions + final File file = mStrategy.getFileForUri(uri); + final int fileMode = modeToMode(mode); + return ParcelFileDescriptor.open(file, fileMode); + } + + /** + * Return {@link PathStrategy} for given authority, either by parsing or + * returning from cache. + */ + private static PathStrategy getPathStrategy(Context context, String authority) { + PathStrategy strat; + synchronized (sCache) { + strat = sCache.get(authority); + if (strat == null) { + try { + strat = parsePathStrategy(context, authority); + } catch (IOException e) { + throw new IllegalArgumentException( + "Failed to parse " + META_DATA_FILE_PROVIDER_PATHS + " meta-data", e); + } catch (XmlPullParserException e) { + throw new IllegalArgumentException( + "Failed to parse " + META_DATA_FILE_PROVIDER_PATHS + " meta-data", e); + } + sCache.put(authority, strat); + } + } + return strat; + } + + /** + * Parse and return {@link PathStrategy} for given authority as defined in + * {@link #META_DATA_FILE_PROVIDER_PATHS} {@code }. + * + * @see #getPathStrategy(Context, String) + */ + private static PathStrategy parsePathStrategy(Context context, String authority) + throws IOException, XmlPullParserException { + final SimplePathStrategy strat = new SimplePathStrategy(authority); + + final ProviderInfo info = context.getPackageManager() + .resolveContentProvider(authority, PackageManager.GET_META_DATA); + if (info == null) { + throw new IllegalArgumentException( + "Couldn't find meta-data for provider with authority " + authority); + } + + final XmlResourceParser in = info.loadXmlMetaData( + context.getPackageManager(), META_DATA_FILE_PROVIDER_PATHS); + if (in == null) { + throw new IllegalArgumentException( + "Missing " + META_DATA_FILE_PROVIDER_PATHS + " meta-data"); + } + + int type; + while ((type = in.next()) != END_DOCUMENT) { + if (type == START_TAG) { + final String tag = in.getName(); + + final String name = in.getAttributeValue(null, ATTR_NAME); + String path = in.getAttributeValue(null, ATTR_PATH); + + File target = null; + if (TAG_ROOT_PATH.equals(tag)) { + target = DEVICE_ROOT; + } else if (TAG_FILES_PATH.equals(tag)) { + target = context.getFilesDir(); + } else if (TAG_CACHE_PATH.equals(tag)) { + target = context.getCacheDir(); + } else if (TAG_EXTERNAL.equals(tag)) { + target = Environment.getExternalStorageDirectory(); + } else if (TAG_EXTERNAL_FILES.equals(tag)) { + File[] externalFilesDirs = context.getExternalFilesDirs(null); + if (externalFilesDirs.length > 0) { + target = externalFilesDirs[0]; + } + } else if (TAG_EXTERNAL_CACHE.equals(tag)) { + File[] externalCacheDirs = context.getExternalCacheDirs(); + if (externalCacheDirs.length > 0) { + target = externalCacheDirs[0]; + } + } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP + && TAG_EXTERNAL_MEDIA.equals(tag)) { + File[] externalMediaDirs = context.getExternalMediaDirs(); + if (externalMediaDirs.length > 0) { + target = externalMediaDirs[0]; + } + } + + if (target != null) { + strat.addRoot(name, buildPath(target, path)); + } + } + } + + return strat; + } + + /** + * Strategy for mapping between {@link File} and {@link Uri}. + *

+ * Strategies must be symmetric so that mapping a {@link File} to a + * {@link Uri} and then back to a {@link File} points at the original + * target. + *

+ * Strategies must remain consistent across app launches, and not rely on + * dynamic state. This ensures that any generated {@link Uri} can still be + * resolved if your process is killed and later restarted. + * + * @see SimplePathStrategy + */ + interface PathStrategy { + /** + * Return a {@link Uri} that represents the given {@link File}. + */ + Uri getUriForFile(File file); + + /** + * Return a {@link File} that represents the given {@link Uri}. + */ + File getFileForUri(Uri uri); + } + + /** + * Strategy that provides access to files living under a narrow whitelist of + * filesystem roots. It will throw {@link SecurityException} if callers try + * accessing files outside the configured roots. + *

+ * For example, if configured with + * {@code addRoot("myfiles", context.getFilesDir())}, then + * {@code context.getFileStreamPath("foo.txt")} would map to + * {@code content://myauthority/myfiles/foo.txt}. + */ + static class SimplePathStrategy implements PathStrategy { + private final String mAuthority; + private final HashMap mRoots = new HashMap(); + + SimplePathStrategy(String authority) { + mAuthority = authority; + } + + /** + * Add a mapping from a name to a filesystem root. The provider only offers + * access to files that live under configured roots. + */ + void addRoot(String name, File root) { + if (TextUtils.isEmpty(name)) { + throw new IllegalArgumentException("Name must not be empty"); + } + + try { + // Resolve to canonical path to keep path checking fast + root = root.getCanonicalFile(); + } catch (IOException e) { + throw new IllegalArgumentException( + "Failed to resolve canonical path for " + root, e); + } + + mRoots.put(name, root); + } + + @Override + public Uri getUriForFile(File file) { + String path; + try { + path = file.getCanonicalPath(); + } catch (IOException e) { + throw new IllegalArgumentException("Failed to resolve canonical path for " + file); + } + + // Find the most-specific root path + Map.Entry mostSpecific = null; + for (Map.Entry root : mRoots.entrySet()) { + final String rootPath = root.getValue().getPath(); + if (path.startsWith(rootPath) && (mostSpecific == null + || rootPath.length() > mostSpecific.getValue().getPath().length())) { + mostSpecific = root; + } + } + + if (mostSpecific == null) { + throw new IllegalArgumentException( + "Failed to find configured root that contains " + path); + } + + // Start at first char of path under root + final String rootPath = mostSpecific.getValue().getPath(); + if (rootPath.endsWith("/")) { + path = path.substring(rootPath.length()); + } else { + path = path.substring(rootPath.length() + 1); + } + + // Encode the tag and path separately + path = Uri.encode(mostSpecific.getKey()) + '/' + Uri.encode(path, "/"); + return new Uri.Builder().scheme("content") + .authority(mAuthority).encodedPath(path).build(); + } + + @Override + public File getFileForUri(Uri uri) { + String path = uri.getEncodedPath(); + + final int splitIndex = path.indexOf('/', 1); + final String tag = Uri.decode(path.substring(1, splitIndex)); + path = Uri.decode(path.substring(splitIndex + 1)); + + final File root = mRoots.get(tag); + if (root == null) { + throw new IllegalArgumentException("Unable to find configured root for " + uri); + } + + File file = new File(root, path); + try { + file = file.getCanonicalFile(); + } catch (IOException e) { + throw new IllegalArgumentException("Failed to resolve canonical path for " + file); + } + + if (!file.getPath().startsWith(root.getPath())) { + throw new SecurityException("Resolved path jumped beyond configured root"); + } + + return file; + } + } + + /** + * Copied from ContentResolver.java + */ + private static int modeToMode(String mode) { + int modeBits; + if ("r".equals(mode)) { + modeBits = ParcelFileDescriptor.MODE_READ_ONLY; + } else if ("w".equals(mode) || "wt".equals(mode)) { + modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY + | ParcelFileDescriptor.MODE_CREATE + | ParcelFileDescriptor.MODE_TRUNCATE; + } else if ("wa".equals(mode)) { + modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY + | ParcelFileDescriptor.MODE_CREATE + | ParcelFileDescriptor.MODE_APPEND; + } else if ("rw".equals(mode)) { + modeBits = ParcelFileDescriptor.MODE_READ_WRITE + | ParcelFileDescriptor.MODE_CREATE; + } else if ("rwt".equals(mode)) { + modeBits = ParcelFileDescriptor.MODE_READ_WRITE + | ParcelFileDescriptor.MODE_CREATE + | ParcelFileDescriptor.MODE_TRUNCATE; + } else { + throw new IllegalArgumentException("Invalid mode: " + mode); + } + return modeBits; + } + + private static File buildPath(File base, String... segments) { + File cur = base; + for (String segment : segments) { + if (segment != null) { + cur = new File(cur, segment); + } + } + return cur; + } + + private static String[] copyOf(String[] original, int newLength) { + final String[] result = new String[newLength]; + System.arraycopy(original, 0, result, 0, newLength); + return result; + } + + private static Object[] copyOf(Object[] original, int newLength) { + final Object[] result = new Object[newLength]; + System.arraycopy(original, 0, result, 0, newLength); + return result; + } +} diff --git a/mastodon/src/main/java/org/joinmastodon/android/TweakedFileProvider.java b/mastodon/src/main/java/org/joinmastodon/android/TweakedFileProvider.java new file mode 100644 index 0000000000..566db69b49 --- /dev/null +++ b/mastodon/src/main/java/org/joinmastodon/android/TweakedFileProvider.java @@ -0,0 +1,38 @@ +package org.joinmastodon.android; + +import android.database.Cursor; +import android.net.Uri; +import android.os.ParcelFileDescriptor; +import android.util.Log; + +import java.io.FileNotFoundException; +import java.util.Arrays; + +import androidx.annotation.NonNull; +import androidx.annotation.Nullable; + +public class TweakedFileProvider extends FileProvider{ + private static final String TAG="TweakedFileProvider"; + + @Override + public String getType(@NonNull Uri uri){ + Log.d(TAG, "getType() called with: uri = ["+uri+"]"); + if(uri.getPathSegments().get(0).equals("image_cache")){ + Log.i(TAG, "getType: HERE!"); + return "image/jpeg"; // might as well be a png but image decoding APIs don't care, needs to be image/* though + } + return super.getType(uri); + } + + @Override + public Cursor query(@NonNull Uri uri, @Nullable String[] projection, @Nullable String selection, @Nullable String[] selectionArgs, @Nullable String sortOrder){ + Log.d(TAG, "query() called with: uri = ["+uri+"], projection = ["+Arrays.toString(projection)+"], selection = ["+selection+"], selectionArgs = ["+Arrays.toString(selectionArgs)+"], sortOrder = ["+sortOrder+"]"); + return super.query(uri, projection, selection, selectionArgs, sortOrder); + } + + @Override + public ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode) throws FileNotFoundException{ + Log.d(TAG, "openFile() called with: uri = ["+uri+"], mode = ["+mode+"]"); + return super.openFile(uri, mode); + } +} diff --git a/mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java b/mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java index 9e27046bce..2145399d27 100644 --- a/mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java +++ b/mastodon/src/main/java/org/joinmastodon/android/fragments/ProfileFragment.java @@ -865,10 +865,7 @@ public void onCreateOptionsMenu(Menu menu, MenuInflater inflater){ public boolean onOptionsItemSelected(MenuItem item){ int id=item.getItemId(); if(id==R.id.share){ - Intent intent=new Intent(Intent.ACTION_SEND); - intent.setType("text/plain"); - intent.putExtra(Intent.EXTRA_TEXT, account.url); - startActivity(Intent.createChooser(intent, item.getTitle())); + UiUtils.openSystemShareSheet(getActivity(), account); }else if(id==R.id.mute){ UiUtils.confirmToggleMuteUser(getActivity(), accountID, account, relationship.muting, this::updateRelationship); }else if(id==R.id.block){ diff --git a/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/FooterStatusDisplayItem.java b/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/FooterStatusDisplayItem.java index a0352cdfb2..445e452c19 100644 --- a/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/FooterStatusDisplayItem.java +++ b/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/FooterStatusDisplayItem.java @@ -451,10 +451,7 @@ private boolean onBookmarkLongClick(View v) { private void onShareClick(View v){ if(item.status.preview) return; UiUtils.opacityIn(v); - Intent intent=new Intent(Intent.ACTION_SEND); - intent.setType("text/plain"); - intent.putExtra(Intent.EXTRA_TEXT, item.status.url); - v.getContext().startActivity(Intent.createChooser(intent, v.getContext().getString(R.string.share_toot_title))); + UiUtils.openSystemShareSheet(v.getContext(), item.status); } private boolean onShareLongClick(View v){ diff --git a/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/HeaderStatusDisplayItem.java b/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/HeaderStatusDisplayItem.java index 1d7070880d..d5f5cf9a0f 100644 --- a/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/HeaderStatusDisplayItem.java +++ b/mastodon/src/main/java/org/joinmastodon/android/ui/displayitems/HeaderStatusDisplayItem.java @@ -289,7 +289,7 @@ public void onError(ErrorResponse error){ args.putString("profileDisplayUsername", account.getDisplayUsername()); Nav.go(item.parentFragment.getActivity(), ListsFragment.class, args); }else if(id==R.id.share){ - UiUtils.openSystemShareSheet(activity, item.status.url); + UiUtils.openSystemShareSheet(activity, item.status); } return true; }); diff --git a/mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java b/mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java index b9d740282a..63dca6f227 100644 --- a/mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java +++ b/mastodon/src/main/java/org/joinmastodon/android/ui/utils/UiUtils.java @@ -13,6 +13,7 @@ import android.content.ActivityNotFoundException; import android.content.ClipData; import android.content.ClipboardManager; +import android.content.ClipData; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; @@ -37,6 +38,8 @@ import android.os.ext.SdkExtensions; import android.provider.MediaStore; import android.provider.OpenableColumns; +import android.system.ErrnoException; +import android.system.Os; import android.text.SpannableStringBuilder; import android.text.Spanned; import android.text.TextUtils; @@ -48,6 +51,7 @@ import android.transition.TransitionManager; import android.transition.TransitionSet; import android.util.Log; +import android.util.Log; import android.util.Pair; import android.view.Gravity; import android.view.HapticFeedbackConstants; @@ -72,6 +76,7 @@ import android.widget.Toast; import org.joinmastodon.android.E; +import org.joinmastodon.android.FileProvider; import org.joinmastodon.android.GlobalUserPreferences; import org.joinmastodon.android.MainActivity; import org.joinmastodon.android.MastodonApp; @@ -134,6 +139,7 @@ import java.io.File; import java.lang.reflect.Field; +import java.io.IOException; import java.lang.reflect.Method; import java.net.IDN; import java.net.URI; @@ -181,6 +187,7 @@ import me.grishka.appkit.Nav; import me.grishka.appkit.api.Callback; import me.grishka.appkit.api.ErrorResponse; +import me.grishka.appkit.imageloader.ImageCache; import me.grishka.appkit.imageloader.ViewImageLoader; import me.grishka.appkit.imageloader.requests.UrlImageLoaderRequest; import me.grishka.appkit.utils.CubicBezierInterpolator; @@ -1754,10 +1761,48 @@ public static String formatDuration(Context context, int seconds){ } } - public static void openSystemShareSheet(Context context, String url){ + public static Uri getFileProviderUri(Context context, File file){ + return FileProvider.getUriForFile(context, context.getPackageName()+".fileprovider", file); + } + + public static void openSystemShareSheet(Context context, Object obj){ Intent intent=new Intent(Intent.ACTION_SEND); intent.setType("text/plain"); + Account account; + String url; + String previewTitle; + + if(obj instanceof Account acc){ + account=acc; + url=acc.url; + previewTitle=context.getString(R.string.share_sheet_preview_profile, account.displayName); + }else if(obj instanceof Status st){ + account=st.account; + url=st.url; + String postText=st.getStrippedText(); + if(TextUtils.isEmpty(postText)){ + previewTitle=context.getString(R.string.share_sheet_preview_profile, account.displayName); + }else{ + if(postText.length()>100) + postText=postText.substring(0, 100)+"..."; + previewTitle=context.getString(R.string.share_sheet_preview_post, account.displayName, postText); + } + }else{ + throw new IllegalArgumentException("Unsupported share object type"); + } + intent.putExtra(Intent.EXTRA_TEXT, url); + intent.putExtra(Intent.EXTRA_TITLE, previewTitle); + ImageCache cache=ImageCache.getInstance(context); + try{ + File ava=cache.getFile(new UrlImageLoaderRequest(account.avatarStatic)); + if(!ava.exists()) + ava=cache.getFile(new UrlImageLoaderRequest(account.avatar)); + if(ava.exists()){ + intent.setClipData(ClipData.newRawUri(null, getFileProviderUri(context, ava))); + intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); + } + }catch(IOException ignore){} context.startActivity(Intent.createChooser(intent, context.getString(R.string.share_toot_title))); } diff --git a/mastodon/src/main/java/org/joinmastodon/android/ui/viewholders/AccountViewHolder.java b/mastodon/src/main/java/org/joinmastodon/android/ui/viewholders/AccountViewHolder.java index 6ba79a50aa..4f4cbdf8d8 100644 --- a/mastodon/src/main/java/org/joinmastodon/android/ui/viewholders/AccountViewHolder.java +++ b/mastodon/src/main/java/org/joinmastodon/android/ui/viewholders/AccountViewHolder.java @@ -298,10 +298,7 @@ private boolean onContextMenuItemSelected(MenuItem item){ int id=item.getItemId(); if(id==R.id.share){ - Intent intent=new Intent(Intent.ACTION_SEND); - intent.setType("text/plain"); - intent.putExtra(Intent.EXTRA_TEXT, account.url); - fragment.startActivity(Intent.createChooser(intent, item.getTitle())); + UiUtils.openSystemShareSheet(fragment.getActivity(), account); }else if(id==R.id.mute){ UiUtils.confirmToggleMuteUser(fragment.getActivity(), accountID, account, relationship.muting, this::updateRelationship); }else if(id==R.id.block){ diff --git a/mastodon/src/main/res/xml/fileprovider_paths.xml b/mastodon/src/main/res/xml/fileprovider_paths.xml new file mode 100644 index 0000000000..c1701d9f43 --- /dev/null +++ b/mastodon/src/main/res/xml/fileprovider_paths.xml @@ -0,0 +1,4 @@ + + + + \ No newline at end of file