Question

我正在尝试通过动态网络应用项目中的youtube API获取YouTube视频评论。

我的代码：

private static int counter = 0;
private static YouTube youtube;

public static void getYoutubeOauth() throws Exception {
    List<String> scopes = Lists.newArrayList("https://www.googleapis.com/auth/youtube.force-ssl");

    Credential credential = Auth.authorize(scopes, "commentthreads");
    youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, credential).build();

    String videoId = "KIgxmV9xXBQ";

    // Get video comments threads
    CommentThreadListResponse commentsPage = prepareListRequest(videoId).execute();

    while (true) {
        handleCommentsThreads(commentsPage.getItems());

        String nextPageToken = commentsPage.getNextPageToken();
        if (nextPageToken == null)
            break;

        // Get next page of video comments threads
        commentsPage = prepareListRequest(videoId).setPageToken(nextPageToken).execute();
    }

    System.out.println("Total: " + counter);
}

private static YouTube.CommentThreads.List prepareListRequest(String videoId) throws Exception {

    return youtube.commentThreads()
                  .list("snippet,replies")
                  .setVideoId(videoId)
                  .setMaxResults(100L)
                  .setModerationStatus("published")
                  .setTextFormat("plainText");
}

private static void handleCommentsThreads(List<CommentThread> commentThreads) {

    for (CommentThread commentThread : commentThreads) {
        List<Comment> comments = Lists.newArrayList();
        comments.add(commentThread.getSnippet().getTopLevelComment());

        CommentThreadReplies replies = commentThread.getReplies();
        if (replies != null)
            comments.addAll(replies.getComments());

        System.out.println("Found " + comments.size() + " comments.");

        // Do your comments logic here
        counter += comments.size();
    }
}

执行上述代码时，我在第java.lang.NullPointerException行<{1}}

仅供参考：我知道Credential credential = Auth.authorize(scopes, "commentthreads");是什么。 NullPointerException导致string n = null; if(n=="h");

我希望NullPointerException文件可以解决原因，因为我不知道在哪里放置以及如何在我的代码中调用它。

我当前的client_secrets.json位于client_secrets.json

下

Answer 1

您可以按如下方式加载客户端机密json文件：

// Load client secrets.
Reader clientSecretReader = new InputStreamReader(Auth.class.getResourceAsStream("/client_secrets.json"));
GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY, clientSecretReader);

有关如何在Google API中使用Auth的更多信息，请查看here

如何在youtube api中调用client_secrets.json？

1 个答案: