|
@@ -0,0 +1,383 @@
|
|
|
+/*
|
|
|
+ * Copyright 2018 Zhenjie Yan
|
|
|
+ *
|
|
|
+ * 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 com.yanzhenjie.permission;
|
|
|
+
|
|
|
+import android.content.ContentProvider;
|
|
|
+import android.content.ContentValues;
|
|
|
+import android.content.Context;
|
|
|
+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.Environment;
|
|
|
+import android.os.ParcelFileDescriptor;
|
|
|
+import android.provider.OpenableColumns;
|
|
|
+import android.text.TextUtils;
|
|
|
+import android.webkit.MimeTypeMap;
|
|
|
+
|
|
|
+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;
|
|
|
+
|
|
|
+import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
|
|
|
+import static org.xmlpull.v1.XmlPullParser.START_TAG;
|
|
|
+
|
|
|
+/**
|
|
|
+ * <p>Copied from the support library v27.1.1.</p>
|
|
|
+ * Created by Zhenjie Yan on 2018/4/28.
|
|
|
+ */
|
|
|
+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("/");
|
|
|
+
|
|
|
+ private static final HashMap<String, PathStrategy> sCache = new HashMap<>();
|
|
|
+
|
|
|
+ private PathStrategy mStrategy;
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public boolean onCreate() {
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public void attachInfo(Context context, ProviderInfo info) {
|
|
|
+ super.attachInfo(context, info);
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+
|
|
|
+ public static Uri getUriForFile(Context context, String authority, File file) {
|
|
|
+ final PathStrategy strategy = getPathStrategy(context, authority);
|
|
|
+ return strategy.getUriForFile(file);
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public String getType(Uri uri) {
|
|
|
+ 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";
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public Uri insert(Uri uri, ContentValues values) {
|
|
|
+ throw new UnsupportedOperationException("No external inserts");
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
|
|
|
+ throw new UnsupportedOperationException("No external updates");
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public int delete(Uri uri, String selection, String[] selectionArgs) {
|
|
|
+ final File file = mStrategy.getFileForUri(uri);
|
|
|
+ return file.delete() ? 1 : 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
|
|
|
+ final File file = mStrategy.getFileForUri(uri);
|
|
|
+ final int fileMode = modeToMode(mode);
|
|
|
+ return ParcelFileDescriptor.open(file, fileMode);
|
|
|
+ }
|
|
|
+
|
|
|
+ private static PathStrategy getPathStrategy(Context context, String authority) {
|
|
|
+ PathStrategy strategy;
|
|
|
+ synchronized (sCache) {
|
|
|
+ strategy = sCache.get(authority);
|
|
|
+ if (strategy == null) {
|
|
|
+ try {
|
|
|
+ strategy = 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, strategy);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return strategy;
|
|
|
+ }
|
|
|
+
|
|
|
+ private static PathStrategy parsePathStrategy(Context context, String authority)
|
|
|
+ throws IOException, XmlPullParserException {
|
|
|
+ final SimplePathStrategy strategy = new SimplePathStrategy(authority);
|
|
|
+ final ProviderInfo info = context.getPackageManager()
|
|
|
+ .resolveContentProvider(authority, PackageManager.GET_META_DATA);
|
|
|
+ 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 = getExternalFilesDirs(context, null);
|
|
|
+ if (externalFilesDirs.length > 0) {
|
|
|
+ target = externalFilesDirs[0];
|
|
|
+ }
|
|
|
+ } else if (TAG_EXTERNAL_CACHE.equals(tag)) {
|
|
|
+ File[] externalCacheDirs = getExternalCacheDirs(context);
|
|
|
+ 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) {
|
|
|
+ strategy.addRoot(name, buildPath(target, path));
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return strategy;
|
|
|
+ }
|
|
|
+
|
|
|
+ interface PathStrategy {
|
|
|
+
|
|
|
+ Uri getUriForFile(File file);
|
|
|
+
|
|
|
+ File getFileForUri(Uri uri);
|
|
|
+ }
|
|
|
+
|
|
|
+ static class SimplePathStrategy implements PathStrategy {
|
|
|
+
|
|
|
+ private final String mAuthority;
|
|
|
+ private final HashMap<String, File> mRoots = new HashMap<String, File>();
|
|
|
+
|
|
|
+ SimplePathStrategy(String authority) {
|
|
|
+ mAuthority = authority;
|
|
|
+ }
|
|
|
+
|
|
|
+ void addRoot(String name, File root) {
|
|
|
+ if (TextUtils.isEmpty(name)) {
|
|
|
+ throw new IllegalArgumentException("Name must not be empty");
|
|
|
+ }
|
|
|
+
|
|
|
+ try {
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+
|
|
|
+ Map.Entry<String, File> mostSpecific = null;
|
|
|
+ for (Map.Entry<String, File> root : mRoots.entrySet()) {
|
|
|
+ final String rootPath = root.getValue().getPath();
|
|
|
+ boolean invalidMost = mostSpecific == null ||
|
|
|
+ rootPath.length() > mostSpecific.getValue().getPath().length();
|
|
|
+ if (path.startsWith(rootPath) && invalidMost) {
|
|
|
+ mostSpecific = root;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (mostSpecific == null) {
|
|
|
+ throw new IllegalArgumentException("Failed to find configured root that contains " + path);
|
|
|
+ }
|
|
|
+
|
|
|
+ final String rootPath = mostSpecific.getValue().getPath();
|
|
|
+ if (rootPath.endsWith("/")) {
|
|
|
+ path = path.substring(rootPath.length());
|
|
|
+ } else {
|
|
|
+ path = path.substring(rootPath.length() + 1);
|
|
|
+ }
|
|
|
+
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ private static File[] getExternalFilesDirs(Context context, String type) {
|
|
|
+ if (Build.VERSION.SDK_INT >= 19) {
|
|
|
+ return context.getExternalFilesDirs(type);
|
|
|
+ } else {
|
|
|
+ return new File[] {context.getExternalFilesDir(type)};
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ public static File[] getExternalCacheDirs(Context context) {
|
|
|
+ if (Build.VERSION.SDK_INT >= 19) {
|
|
|
+ return context.getExternalCacheDirs();
|
|
|
+ } else {
|
|
|
+ return new File[] {context.getExternalCacheDir()};
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|