| 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.android_webview; |
| 6 | |
| 7 | import android.graphics.Bitmap; |
| 8 | import android.os.AsyncTask; |
| 9 | import android.util.Log; |
| 10 | |
| 11 | import org.chromium.base.ThreadUtils; |
| 12 | |
| 13 | import java.io.IOException; |
| 14 | import java.io.InputStream; |
| 15 | import java.io.OutputStream; |
| 16 | import java.io.PipedInputStream; |
| 17 | import java.io.PipedOutputStream; |
| 18 | import java.util.Random; |
| 19 | |
| 20 | /** |
| 21 | * This class takes advantage of shouldInterceptRequest(), returns the bitmap from |
| 22 | * WebChromeClient.getDefaultVidoePoster() when the mDefaultVideoPosterURL is requested. |
| 23 | * |
| 24 | * The shouldInterceptRequest is used to get the default video poster, if the url is |
| 25 | * the mDefaultVideoPosterURL. |
| 26 | */ |
| 27 | public class DefaultVideoPosterRequestHandler { |
| 28 | private static InputStream getInputStream(final AwContentsClient contentClient) |
| 29 | throws IOException { |
| 30 | final PipedInputStream inputStream = new PipedInputStream(); |
| 31 | final PipedOutputStream outputStream = new PipedOutputStream(inputStream); |
| 32 | |
| 33 | // Send the request to UI thread to callback to the client, and if it provides a |
| 34 | // valid bitmap bounce on to the worker thread pool to compress it into the piped |
| 35 | // input/output stream. |
| 36 | ThreadUtils.runOnUiThread(new Runnable() { |
| 37 | @Override |
| 38 | public void run() { |
| 39 | final Bitmap defaultVideoPoster = contentClient.getDefaultVideoPoster(); |
| 40 | if (defaultVideoPoster == null) { |
| 41 | closeOutputStream(outputStream); |
| 42 | return; |
| 43 | } |
| 44 | AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() { |
| 45 | @Override |
| 46 | public void run() { |
| 47 | try { |
| 48 | defaultVideoPoster.compress(Bitmap.CompressFormat.PNG, 100, |
| 49 | outputStream); |
| 50 | outputStream.flush(); |
| 51 | } catch (IOException e) { |
| 52 | Log.e(TAG, null, e); |
| 53 | } finally { |
| 54 | closeOutputStream(outputStream); |
| 55 | } |
| 56 | } |
| 57 | }); |
| 58 | } |
| 59 | }); |
| 60 | return inputStream; |
| 61 | } |
| 62 | |
| 63 | private static void closeOutputStream(OutputStream outputStream) { |
| 64 | try { |
| 65 | outputStream.close(); |
| 66 | } catch (IOException e) { |
| 67 | Log.e(TAG, null, e); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | private static final String TAG = "DefaultVideoPosterRequestHandler"; |
| 72 | private String mDefaultVideoPosterURL; |
| 73 | private AwContentsClient mContentClient; |
| 74 | |
| 75 | public DefaultVideoPosterRequestHandler(AwContentsClient contentClient) { |
| 76 | mDefaultVideoPosterURL = GenerateDefaulVideoPosterURL(); |
| 77 | mContentClient = contentClient; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Used to get the image if the url is mDefaultVideoPosterURL. |
| 82 | * |
| 83 | * @param url the url requested |
| 84 | * @return InterceptedRequestData which caller can get the image if the url is |
| 85 | * the default video poster URL, otherwise null is returned. |
| 86 | */ |
| 87 | public InterceptedRequestData shouldInterceptRequest(final String url) { |
| 88 | if (!mDefaultVideoPosterURL.equals(url)) return null; |
| 89 | |
| 90 | try { |
| 91 | return new InterceptedRequestData("image/png", null, getInputStream(mContentClient)); |
| 92 | } catch (IOException e) { |
| 93 | Log.e(TAG, null, e); |
| 94 | return null; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | public String getDefaultVideoPosterURL() { |
| 99 | return mDefaultVideoPosterURL; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * @return a unique URL which has little chance to be used by application. |
| 104 | */ |
| 105 | private static String GenerateDefaulVideoPosterURL() { |
| 106 | Random randomGenerator = new Random(); |
| 107 | String path = String.valueOf(randomGenerator.nextLong()); |
| 108 | return "android-webview:default_video_poster/" + path; |
| 109 | } |
| 110 | } |