1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.messaging.util; 17 18 import android.net.Uri; 19 import android.text.TextUtils; 20 21 public class YouTubeUtil { 22 private static final String YOUTUBE_HOST_1 = "www.youtube.com"; 23 private static final String YOUTUBE_HOST_2 = "youtube.com"; 24 private static final String YOUTUBE_HOST_3 = "m.youtube.com"; 25 private static final String YOUTUBE_HOST_4 = "youtube.googleapis.com"; 26 private static final String YOUTUBE_HOST_5 = "youtu.be"; 27 28 private static final String YOUTUBE_PATH_1 = "/watch"; 29 private static final String YOUTUBE_PATH_2 = "/embed/"; 30 private static final String YOUTUBE_PATH_3 = "/v/"; 31 private static final String YOUTUBE_PATH_4 = "/apiplayer"; 32 33 public static final String YOUTUBE_STATIC_THUMBNAIL_PREFIX = "https://img.youtube.com/vi/"; 34 public static final String YOUTUBE_STATIC_THUMBNAIL_END = "/hqdefault.jpg"; 35 36 public static String getYoutubePreviewImageLink(String urlString) { 37 // Types of youtube urls: 38 // 1.) http://www.youtube.com/watch?v=VIDEOID 39 // 2.) http://www.youtube.com/embed/VIDEOID 40 // 3.) http://www.youtube.com/v/VIDEOID 41 // 3a.) https://youtube.googleapis.com/v/VIDEOID 42 // 4.) http://www.youtube.com/apiplayer?video_id=VIDEO_ID 43 // 5.) http://youtu.be/VIDEOID 44 if (!urlString.startsWith("http")) { 45 // Apparently the url is not an RFC 2396 compliant uri without the port 46 urlString = "http://" + urlString; 47 } 48 final Uri uri = Uri.parse(urlString); 49 final String host = uri.getHost(); 50 if (YOUTUBE_HOST_1.equalsIgnoreCase(host) 51 || YOUTUBE_HOST_2.equalsIgnoreCase(host) 52 || YOUTUBE_HOST_3.equalsIgnoreCase(host) 53 || YOUTUBE_HOST_4.equalsIgnoreCase(host) 54 || YOUTUBE_HOST_5.equalsIgnoreCase(host)) { 55 final String videoId = getYouTubeVideoId(uri); 56 if (!TextUtils.isEmpty(videoId)) { 57 return YOUTUBE_STATIC_THUMBNAIL_PREFIX + videoId + YOUTUBE_STATIC_THUMBNAIL_END; 58 } 59 return null; 60 } 61 return null; 62 } 63 64 private static String getYouTubeVideoId(Uri uri) { 65 final String urlPath = uri.getPath(); 66 67 if (TextUtils.isEmpty(urlPath)) { 68 // There is no path so no need to continue. 69 return null; 70 } 71 // Case 1 72 if (urlPath.startsWith(YOUTUBE_PATH_1)) { 73 return uri.getQueryParameter("v"); 74 } 75 // Case 2 76 if (urlPath.startsWith(YOUTUBE_PATH_2)) { 77 return getVideoIdFromPath(YOUTUBE_PATH_2, urlPath); 78 } 79 // Case 3 80 if (urlPath.startsWith(YOUTUBE_PATH_3)) { 81 return getVideoIdFromPath(YOUTUBE_PATH_3, urlPath); 82 } 83 // Case 4 84 if (urlPath.startsWith(YOUTUBE_PATH_4)) { 85 return uri.getQueryParameter("video_id"); 86 } 87 // Case 5 88 if (YOUTUBE_HOST_5.equalsIgnoreCase(uri.getHost())) { 89 return getVideoIdFromPath("/", urlPath); 90 } 91 return null; 92 } 93 94 private static String getVideoIdFromPath(String prefixSubstring, String urlPath) { 95 return urlPath.substring(prefixSubstring.length()); 96 } 97 98 } 99
