mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge
synced 2024-09-07 23:16:09 +02:00
199 lines
6.9 KiB
Java
199 lines
6.9 KiB
Java
/* Copyright (C) 2016-2024 Carsten Pfeiffer, Daniele Gobbetti, Taavi Eomäe
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.util;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.Uri;
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import android.provider.MediaStore;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.BufferedInputStream;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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public class UriHelper {
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@NonNull
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private final Uri uri;
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@NonNull
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private final Context context;
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private String fileName;
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private long fileSize;
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@Nullable
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private File file;
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private static final Logger LOG = LoggerFactory.getLogger(UriHelper.class);
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private UriHelper(@NonNull Uri uri, @NonNull Context context) {
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this.uri = uri;
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this.context = context;
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}
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/**
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* Returns the uri as passed to #get(Uri, Context)
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*/
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@NonNull
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public Uri getUri() {
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return uri;
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}
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/**
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* Returns the context as passed to #get(Uri, Context)
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*/
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@NonNull
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public Context getContext() {
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return context;
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}
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/**
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* Returns an immutable helper to access the given Uri. In case the uri cannot be read/resolved
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* an IOException is thrown.
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* @param uri the uri to access
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* @param context the context for accessing uris
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* @throws IOException
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*/
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@NonNull
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public static UriHelper get(@NonNull Uri uri, @NonNull Context context) throws FileNotFoundException, IOException {
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UriHelper helper = new UriHelper(uri, context);
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helper.resolveMetadata();
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return helper;
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}
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/**
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* Opens a stream to read the contents of the uri.
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* Note: the caller has to close the stream after usage.
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* Every invocation of this method will open a new stream.
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* FIXME: make sure that every caller actually closes the returned stream!
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* @throws FileNotFoundException
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*/
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@NonNull
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public InputStream openInputStream() throws FileNotFoundException {
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ContentResolver cr = context.getContentResolver();
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InputStream inputStream = cr.openInputStream(uri);
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if (inputStream != null) {
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return new BufferedInputStream(inputStream);
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}
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throw new FileNotFoundException("Unable to open inputstream for " + uri);
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}
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/**
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* Returns the content length (file size) in bytes
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*/
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public long getFileSize() {
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return fileSize;
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}
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/**
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* Returns the name of the file referenced by the Uri. Does not include the path.
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*/
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@NonNull
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public String getFileName() {
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return fileName;
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}
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/**
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* Returns the file behind the uri, or null in case it is not a file:/ Uri.
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* @return the file or null
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*/
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@Nullable
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public File getFile() {
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return file;
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}
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private void resolveMetadata() throws IOException {
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if (uri == null) {
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throw new IOException("URI was null, can't query metadata");
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}
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String uriScheme = uri.getScheme();
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if (uriScheme == null) {
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throw new IOException("URI scheme was null, can't query metadata");
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}
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switch (uriScheme) {
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case ContentResolver.SCHEME_CONTENT:
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Cursor cursor;
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try {
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ContentResolver resolver = context.getContentResolver();
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cursor = resolver.query(
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uri,
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new String[]{
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MediaStore.MediaColumns.DISPLAY_NAME,
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MediaStore.MediaColumns.SIZE
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}, null, null, null);
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} catch (IllegalStateException e) {
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LOG.error(e.toString());
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throw new IOException("IllegalStateException when trying to query metadata for: " + uri);
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}
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if (cursor == null) {
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throw new IOException("Unable to query metadata for: " + uri);
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}
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try {
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if (cursor.moveToFirst()) {
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int name_index = cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME);
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if (name_index == -1) {
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throw new IOException("Unable to retrieve name for: " + uri);
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}
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int size_index = cursor.getColumnIndex(MediaStore.MediaColumns.SIZE);
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if (size_index == -1) {
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throw new IOException("Unable to retrieve size for: " + uri);
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}
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try {
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fileName = cursor.getString(name_index);
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if (fileName == null) {
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throw new IOException("Unable to retrieve name for: " + uri);
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}
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fileSize = cursor.getLong(size_index);
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if (fileSize < 0) {
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throw new IOException("Unable to retrieve size for: " + uri);
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}
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} catch (Exception ex) {
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throw new IOException("Unable to retrieve metadata for: " + uri + ": " + ex.getMessage());
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}
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}
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} finally {
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cursor.close();
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}
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break;
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case ContentResolver.SCHEME_FILE:
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file = new File(uri.getPath());
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if (!file.exists()) {
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throw new FileNotFoundException("Does not exist: " + file);
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}
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fileName = file.getName();
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fileSize = file.length();
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break;
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case ContentResolver.SCHEME_ANDROID_RESOURCE:
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// we could actually read it, but I don't see how we can determine the file size
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throw new IOException("Unsupported scheme for uri: " + uri);
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default:
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throw new IOException("Unsupported scheme for uri: " + uri);
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}
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}
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}
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