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------- Default ------- Copyright (C) 2012, 2013, 2014 Younghyung Cho. <yhcting77@gmail.com> All rights reserved. This file is part of NetMBuddy This program is licensed under the FreeBSD license R...
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/****************************************************************************** * Copyright (C) 2012, 2013, 2014//w w w. ja v a2 s.c om * Younghyung Cho. <yhcting77@gmail.com> * All rights reserved. * * This file is part of NetMBuddy * * This program is licensed under the FreeBSD license * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * The views and conclusions contained in the software and documentation * are those of the authors and should not be interpreted as representing * official policies, either expressed or implied, of the FreeBSD Project. *****************************************************************************/ package free.yhc.netmbuddy.model; import static free.yhc.netmbuddy.utils.Utils.eAssert; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.net.Uri; import android.os.Handler; import android.os.HandlerThread; import android.os.Looper; import android.os.Message; import android.os.Process; import free.yhc.netmbuddy.utils.Utils; public class YTDownloader { private static final boolean DBG = false; private static final Utils.Logger P = new Utils.Logger(YTDownloader.class); private static final int MSG_WHAT_CLOSE = 0; private static final int MSG_WHAT_DOWNLOAD = 1; private String mProxy = null; private DownloadDoneReceiver mDnDoneRcvr = null; private BGHandler mBgHandler = null; private Object mUserTag = null; // user tag value public interface DownloadDoneReceiver { void downloadDone(YTDownloader downloader, DnArg arg, Err err); } public static enum Err { NO_ERR, IO_NET, IO_FILE, PROTOCOL, // unexpected response from Youtube NETWORK_UNAVAILABLE, UNSUPPORTED_VIDFORMAT, INTERRUPTED, UNKNOWN, // err inside module } public static class DnArg { String ytvid; File outf; int qscore; public DnArg(String aYtvid, File aOutf, int aQscore) { ytvid = aYtvid; outf = aOutf; qscore = aQscore; } } private static class BGThread extends HandlerThread { BGThread() { super("YTDownloader.BGThread",Process.THREAD_PRIORITY_BACKGROUND); } @Override protected void onLooperPrepared() { super.onLooperPrepared(); } } private static class BGHandler extends Handler { private final YTDownloader _mYtDownloader; private NetLoader _mLoader = new NetLoader(); private File _mTmpF = null; private volatile File _mCurOutF = null; private boolean _mClosed = false; BGHandler(Looper looper, YTDownloader ytDownloader) { super(looper); _mYtDownloader = ytDownloader; } private void sendResult(final DnArg arg, final Err result) { if (null == _mYtDownloader.getDownloadDoneReceiver()) return; Utils.getUiHandler().post(new Runnable() { @Override public void run() { DownloadDoneReceiver rcvr = _mYtDownloader.getDownloadDoneReceiver(); if (!_mClosed && null != rcvr) rcvr.downloadDone(_mYtDownloader, arg, result); } }); } // This is synchronous function. // That is, ONLY one file can be download in one YTDownloader instance at a time. private void handleDownload(DnArg arg) { // assigning object reference is atomic operation in JAVA _mCurOutF = arg.outf; if (null != _mTmpF) _mTmpF.delete(); if (DBG) P.v("Start Download : " + arg.ytvid + " => " + arg.outf.getAbsolutePath()); YTHacker hack = new YTHacker(arg.ytvid, null, null); FileOutputStream fos = null; try { YTHacker.Err hkerr = hack.start(); if (YTHacker.Err.NO_ERR != hkerr) { sendResult(arg, map(hkerr)); return; } _mLoader = hack.getNetLoader(); YTHacker.YtVideo vid = hack.getVideo(arg.qscore, false); if (null == vid) { sendResult(arg, Err.UNSUPPORTED_VIDFORMAT); return; } NetLoader.HttpRespContent content = _mLoader.getHttpContent(Uri.parse(vid.url), false); if (HttpUtils.SC_NO_CONTENT == content.stcode) { sendResult(arg, Err.IO_NET); return; } // Download to temp file. _mTmpF = File.createTempFile(arg.ytvid, null, new File(Policy.APPDATA_TMPDIR)); fos = new FileOutputStream(_mTmpF); Utils.copy(fos, content.stream); fos.close(); fos = null; // file returned by YTHacker is mpeg format! _mTmpF.renameTo(arg.outf); sendResult(arg, Err.NO_ERR); if (DBG) P.v("Download Done : " + arg.ytvid); } catch (FileNotFoundException e) { sendResult(arg, Err.IO_FILE); } catch (InterruptedException e) { if (DBG) P.v("Download Interrupted!"); sendResult(arg, Err.INTERRUPTED); } catch (IOException e) { if (DBG) P.v("Download IOException!"); sendResult(arg, Err.IO_FILE); } catch (NetLoader.LocalException e) { if (DBG) P.v("NetLoader Exception!"); sendResult(arg, map(e.error())); } finally { _mLoader.close(); if (null != fos) try { fos.close(); } catch (IOException e) {} if (null != _mTmpF) _mTmpF.delete(); // assigning object reference is atomic operation in JAVA _mCurOutF = null; } } String getCurrentTargetFile() { // NOTE. // curOutF is volatile and assigning object reference is atomic operation in JAVA. // So, synchronization is not required here. File outF = _mCurOutF; return (null == outF)? null: outF.getAbsolutePath(); } void close() { removeMessages(MSG_WHAT_DOWNLOAD); sendEmptyMessage(MSG_WHAT_CLOSE); } @Override public void handleMessage(Message msg) { if (_mClosed) return; switch (msg.what) { case MSG_WHAT_CLOSE: _mClosed = true; if (null != _mLoader) _mLoader.close(); ((HandlerThread)getLooper().getThread()).quit(); break; case MSG_WHAT_DOWNLOAD: handleDownload((DnArg)msg.obj); break; } } } private static Err map(YTHacker.Err err) { switch (err) { case NO_ERR: return Err.NO_ERR; case IO_NET: return Err.IO_NET; case NETWORK_UNAVAILABLE: return Err.NETWORK_UNAVAILABLE; case PARSE_HTML: return Err.PROTOCOL; case INTERRUPTED: return Err.INTERRUPTED; default: return Err.UNKNOWN; } } private static Err map(NetLoader.Err err) { switch (err) { case NO_ERR: return Err.NO_ERR; case HTTPGET: case IO_NET: return Err.IO_NET; case INTERRUPTED: return Err.INTERRUPTED; default: return Err.UNKNOWN; } } DownloadDoneReceiver getDownloadDoneReceiver() { return mDnDoneRcvr; } // ====================================================================== // // // // ====================================================================== public YTDownloader() { } public void setTag(Object tag) { mUserTag = tag; } public Object getTag() { return mUserTag; } public String getCurrentTargetFile() { return (null == mBgHandler)? null: mBgHandler.getCurrentTargetFile(); } /** * * @param ytvid * 11-character-long youtube video id * @param delay * real-downloading will be started after 'delay' milliseconds. */ public Err download(final String ytvid, final File outf, final int qscore, final long delay) { eAssert(Utils.isUiThread()); if (outf.exists()) { if (null != mDnDoneRcvr) { // already downloaded. Utils.getUiHandler().post(new Runnable() { @Override public void run() { mDnDoneRcvr.downloadDone(YTDownloader.this, new DnArg(ytvid, outf, qscore), Err.NO_ERR); } }); } return Err.NO_ERR; } if (Utils.isNetworkAvailable()) { Message msg = mBgHandler.obtainMessage(MSG_WHAT_DOWNLOAD, new DnArg(ytvid, outf, qscore)); mBgHandler.sendMessageDelayed(msg, delay); return Err.NO_ERR; } return Err.NETWORK_UNAVAILABLE; } public void open(String proxy, DownloadDoneReceiver dnDoneRcvr) { mProxy = proxy; mDnDoneRcvr = dnDoneRcvr; HandlerThread hThread = new BGThread(); hThread.start(); mBgHandler = new BGHandler(hThread.getLooper(), this); } public void close() { // TODO // Stop running thread! // Need to check that below code works as expected perfectly. // "interrupting thread" is quite annoying and unpredictable job! if (null != mBgHandler) mBgHandler.close(); } }