Java tutorial
/** * Licensed to The Apereo Foundation under one or more contributor license * agreements. See the NOTICE file distributed with this work for additional * information regarding copyright ownership. * * * The Apereo Foundation licenses this file to you under the Educational * Community 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://opensource.org/licenses/ecl2.txt * * 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 org.opencastproject.publication.youtube; import com.google.api.client.googleapis.auth.oauth2.GoogleCredential; import com.google.api.client.googleapis.media.MediaHttpUploader; import com.google.api.client.http.InputStreamContent; import com.google.api.client.http.javanet.NetHttpTransport; import com.google.api.client.json.jackson2.JacksonFactory; import com.google.api.services.youtube.YouTube; import com.google.api.services.youtube.YouTubeRequest; import com.google.api.services.youtube.model.Playlist; import com.google.api.services.youtube.model.PlaylistItem; import com.google.api.services.youtube.model.PlaylistItemListResponse; import com.google.api.services.youtube.model.PlaylistItemSnippet; import com.google.api.services.youtube.model.PlaylistListResponse; import com.google.api.services.youtube.model.PlaylistSnippet; import com.google.api.services.youtube.model.PlaylistStatus; import com.google.api.services.youtube.model.ResourceId; import com.google.api.services.youtube.model.SearchListResponse; import com.google.api.services.youtube.model.Video; import com.google.api.services.youtube.model.VideoListResponse; import com.google.api.services.youtube.model.VideoSnippet; import com.google.api.services.youtube.model.VideoStatus; import org.apache.commons.lang.ArrayUtils; import org.opencastproject.publication.youtube.auth.ClientCredentials; import org.opencastproject.publication.youtube.auth.OAuth2CredentialFactory; import org.opencastproject.publication.youtube.auth.OAuth2CredentialFactoryImpl; import org.opencastproject.util.data.Collections; import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.util.LinkedList; import java.util.List; public class YouTubeAPIVersion3ServiceImpl implements YouTubeAPIVersion3Service { private YouTube youTube; @Override public void initialize(final ClientCredentials credentials) throws IOException { final OAuth2CredentialFactory factory = new OAuth2CredentialFactoryImpl(); final GoogleCredential credential = factory.getGoogleCredential(credentials); youTube = new YouTube.Builder(new NetHttpTransport(), new JacksonFactory(), credential).build(); } @Override public Video addVideoToMyChannel(final VideoUpload videoUpload) throws IOException { final Video videoObjectDefiningMetadata = new Video(); final VideoStatus status = new VideoStatus(); status.setPrivacyStatus(videoUpload.getPrivacyStatus()); videoObjectDefiningMetadata.setStatus(status); // Metadata lives in VideoSnippet final VideoSnippet snippet = new VideoSnippet(); snippet.setTitle(videoUpload.getTitle()); snippet.setDescription(videoUpload.getDescription()); final String[] tags = videoUpload.getTags(); if (ArrayUtils.isNotEmpty(tags)) { snippet.setTags(Collections.list(tags)); } // Attach metadata to video object. videoObjectDefiningMetadata.setSnippet(snippet); final File videoFile = videoUpload.getVideoFile(); final BufferedInputStream inputStream = new BufferedInputStream(new FileInputStream(videoFile)); final InputStreamContent mediaContent = new InputStreamContent("video/*", inputStream); mediaContent.setLength(videoFile.length()); final YouTube.Videos.Insert videoInsert = youTube.videos().insert("snippet,statistics,status", videoObjectDefiningMetadata, mediaContent); final MediaHttpUploader uploader = videoInsert.getMediaHttpUploader(); uploader.setDirectUploadEnabled(false); uploader.setProgressListener(videoUpload.getProgressListener()); return execute(videoInsert); } @Override public Playlist createPlaylist(final String title, final String description, final String... tags) throws IOException { final PlaylistSnippet playlistSnippet = new PlaylistSnippet(); playlistSnippet.setTitle(title); playlistSnippet.setDescription(description); if (tags.length > 0) { playlistSnippet.setTags(Collections.list(tags)); } // Playlists are always public. The videos therein might be private. final PlaylistStatus playlistStatus = new PlaylistStatus(); playlistStatus.setPrivacyStatus("public"); // Create playlist with metadata and status. final Playlist youTubePlaylist = new Playlist(); youTubePlaylist.setSnippet(playlistSnippet); youTubePlaylist.setStatus(playlistStatus); // The first argument tells the API what to return when a successful insert has been executed. final YouTube.Playlists.Insert command = youTube.playlists().insert("snippet,status", youTubePlaylist); return execute(command); } @Override public PlaylistItem addPlaylistItem(final String playlistId, final String videoId) throws IOException { // Resource type (video,playlist,channel) needs to be set along with resource id. final ResourceId resourceId = new ResourceId(); resourceId.setKind("youtube#video"); resourceId.setVideoId(videoId); // Set the required snippet properties. final PlaylistItemSnippet playlistItemSnippet = new PlaylistItemSnippet(); playlistItemSnippet.setTitle("First video in the test playlist"); playlistItemSnippet.setPlaylistId(playlistId); playlistItemSnippet.setResourceId(resourceId); // Create the playlist item. final PlaylistItem playlistItem = new PlaylistItem(); playlistItem.setSnippet(playlistItemSnippet); // The first argument tells the API what to return when a successful insert has been executed. final YouTube.PlaylistItems.Insert playlistItemsInsertCommand = youTube.playlistItems() .insert("snippet,contentDetails", playlistItem); return execute(playlistItemsInsertCommand); } @Override public void removeVideoFromPlaylist(final String playlistId, final String videoId) throws IOException { final PlaylistItem playlistItem = findPlaylistItem(playlistId, videoId); final YouTube.PlaylistItems.Delete deleteRequest = youTube.playlistItems().delete(playlistItem.getId()); execute(deleteRequest); } @Override public void removeMyVideo(final String videoId) throws Exception { final YouTube.Videos.Delete deleteRequest = youTube.videos().delete(videoId); execute(deleteRequest); } @Override public void removeMyPlaylist(final String playlistId) throws IOException { final YouTube.Playlists.Delete deleteRequest = youTube.playlists().delete(playlistId); execute(deleteRequest); } @Override public SearchListResponse searchMyVideos(final String queryTerm, final String pageToken, final long maxResults) throws IOException { final YouTube.Search.List search = youTube.search().list("id,snippet"); if (pageToken != null) { search.set("pageToken", pageToken); } search.setQ(queryTerm); search.setType("video"); search.setForMine(true); search.setMaxResults(maxResults); search.setFields("items(id,kind,snippet),nextPageToken,pageInfo,prevPageToken,tokenPagination"); return execute(search); } @Override public Video getVideoById(final String videoId) throws IOException { final YouTube.Videos.List search = youTube.videos().list("id,snippet"); search.setId(videoId); search.setFields("items(id,kind,snippet),nextPageToken,pageInfo,prevPageToken,tokenPagination"); final VideoListResponse response = execute(search); return response.getItems().isEmpty() ? null : response.getItems().get(0); } @Override public Playlist getMyPlaylistByTitle(final String title) throws IOException { final String trimmedTitle = title.trim(); boolean searchedAllPlaylist = false; Playlist playlist = null; String nextPageToken = null; while (!searchedAllPlaylist) { final PlaylistListResponse searchResult = getMyPlaylists(nextPageToken, 50); for (final Playlist p : searchResult.getItems()) { if (p.getSnippet().getTitle().trim().equals(trimmedTitle)) { playlist = p; break; } } nextPageToken = searchResult.getNextPageToken(); searchedAllPlaylist = nextPageToken == null; } return playlist; } @Override public PlaylistListResponse getMyPlaylists(final String pageToken, final long maxResults) throws IOException { final YouTube.Playlists.List search = youTube.playlists().list("id,snippet"); if (pageToken != null) { search.set("pageToken", pageToken); } search.setMaxResults(maxResults); search.setMine(true); search.setFields("items(id,snippet),kind,nextPageToken,pageInfo,prevPageToken,tokenPagination"); return execute(search); } @Override public PlaylistItemListResponse getPlaylistItems(final String playlistId, final String pageToken, final long maxResults) throws IOException { final YouTube.PlaylistItems.List search = youTube.playlistItems().list("id,snippet"); search.setPlaylistId(playlistId); search.setPageToken(pageToken); search.setMaxResults(maxResults); search.setFields("items(id,kind,snippet),nextPageToken,pageInfo,prevPageToken,tokenPagination"); return execute(search); } /** * @param playlistId may not be {@code null} * @param videoId may not be {@code null} * @return null when not found. * @throws IOException when transaction fails. */ private PlaylistItem findPlaylistItem(final String playlistId, final String videoId) throws IOException { final List<PlaylistItem> playlistItems = getAllPlaylistItems(playlistId); PlaylistItem playlistItem = null; for (final PlaylistItem next : playlistItems) { final String id = next.getSnippet().getResourceId().getVideoId(); if (videoId.equals(id)) { playlistItem = next; break; } } return playlistItem; } /** * * @param playlistId may not be {@code null} * @return zero or more playlist items. * @throws IOException when transaction fails. */ private List<PlaylistItem> getAllPlaylistItems(final String playlistId) throws IOException { final List<PlaylistItem> playlistItems = new LinkedList<PlaylistItem>(); boolean done = false; String nextPageToken = null; while (!done) { final PlaylistItemListResponse searchResult = getPlaylistItems(playlistId, nextPageToken, 50); playlistItems.addAll(searchResult.getItems()); nextPageToken = searchResult.getNextPageToken(); done = nextPageToken == null; } return playlistItems; } /** * @see com.google.api.services.youtube.YouTubeRequest#execute() * @param command may not be {@code null} * @param <T> type of request. * @return result; may be {@code null} * @throws IOException when transaction fails. */ private <T> T execute(final YouTubeRequest<T> command) throws IOException { return command.execute(); } }