diff options
Diffstat (limited to 'src/com/android/gallery3d/data/DownloadUtils.java')
-rw-r--r-- | src/com/android/gallery3d/data/DownloadUtils.java | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/data/DownloadUtils.java b/src/com/android/gallery3d/data/DownloadUtils.java new file mode 100644 index 000000000..137898e91 --- /dev/null +++ b/src/com/android/gallery3d/data/DownloadUtils.java @@ -0,0 +1,79 @@ +/* + * Copyright (C) 2010 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 com.android.gallery3d.data; + +import com.android.gallery3d.common.Utils; +import com.android.gallery3d.util.ThreadPool.CancelListener; +import com.android.gallery3d.util.ThreadPool.JobContext; + +import java.io.File; +import java.io.FileOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.InterruptedIOException; +import java.io.OutputStream; +import java.net.URL; + +public class DownloadUtils { + private static final String TAG = "DownloadService"; + + public static boolean requestDownload(JobContext jc, URL url, File file) { + FileOutputStream fos = null; + try { + fos = new FileOutputStream(file); + return download(jc, url, fos); + } catch (Throwable t) { + return false; + } finally { + Utils.closeSilently(fos); + } + } + + public static void dump(JobContext jc, InputStream is, OutputStream os) + throws IOException { + byte buffer[] = new byte[4096]; + int rc = is.read(buffer, 0, buffer.length); + final Thread thread = Thread.currentThread(); + jc.setCancelListener(new CancelListener() { + @Override + public void onCancel() { + thread.interrupt(); + } + }); + while (rc > 0) { + if (jc.isCancelled()) throw new InterruptedIOException(); + os.write(buffer, 0, rc); + rc = is.read(buffer, 0, buffer.length); + } + jc.setCancelListener(null); + Thread.interrupted(); // consume the interrupt signal + } + + public static boolean download(JobContext jc, URL url, OutputStream output) { + InputStream input = null; + try { + input = url.openStream(); + dump(jc, input, output); + return true; + } catch (Throwable t) { + Log.w(TAG, "fail to download", t); + return false; + } finally { + Utils.closeSilently(input); + } + } +}
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