如何检索YouTube视频的评论

I am trying to get all the comments on a youtube video using following approach, but i cant fetch all the comments related to the video only some of the comments are fetched. i tried googling this but nothing helped, can someone explain , how to get all the comments related to a youtube video.

我试图使用以下方法获取有关YouTube视频的所有评论,但我无法获取与视频相关的所有评论,只提取了一些评论。我试过谷歌搜索,但没有任何帮助,有人可以解释,如何得到所有与YouTube视频相关的评论。

//url :- "https://www.googleapis.com/auth/youtube.force-ssl"

public void ReadAllComments(String videoId){
    try {

        CommentThreadListResponse videoCommentsListResponse = youtube.commentThreads()
                .list("snippet").setVideoId(videoId).setTextFormat("plainText").execute();

        List<CommentThread> videoComments = videoCommentsListResponse.getItems();

            for (CommentThread videoComment : videoComments) {             
                CommentSnippet  snippet = videoComment.getSnippet().getTopLevelComment().getSnippet();
                System.out.println("  - Author: " + snippet.getAuthorDisplayName());
                System.out.println("  - Comment: " + snippet.getTextDisplay());
                System.out.println("\n-------------------------------------------------------------\n");
            }

    } catch (Exception e) {
         e.printStackTrace();
    }

}

2 个解决方案

#1

  CommentThreadListResponse videoCommentsListResponse = youtube.commentThreads()
.list("snippet").setVideoId(videoId).setTextFormat("plainText").execute();

changing above code to this worked,

改变上面的代码到这个工作,

 CommentThreadListResponse videoCommentsListResponse = youtube.commentThreads()
.list("snippet").setVideoId(videoId).setMaxResults(50l).setTextFormat("plainText").execute();

#2

You can retrieve the comments in YouTube video by using the CommentThreads. A commentThread resource contains information about a YouTube comment thread, which comprises a top-level comment and replies, if any exist, to that comment. A commentThread resource can represent comments about either a video or a channel.

您可以使用CommentThreads检索YouTube视频中的评论。 commentThread资源包含有关YouTube评论主题的信息,其中包含*评论和对该评论的回复(如果存在)。 commentThread资源可以表示有关视频或频道的评论。

Here is the example HTTP request to get comments.

以下是获取注释的示例HTTP请求。

https://www.googleapis.com/youtube/v3/commentThreads?key=YOUR_API_KEY&textFormat=plainText&part=snippet&videoId=Vm8qiuDgcJ8&maxResults=50

Just check the different parameters that you can use in this request.

只需检查您可以在此请求中使用的不同参数。

You can also check the different sample code in this documentation.

您还可以查看本文档中的不同示例代码。

Here is the example for JAVA.

以下是JAVA的示例。

package com.google.api.services.samples.youtube.cmdline.data;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.Comment;
import com.google.api.services.youtube.model.CommentSnippet;
import com.google.api.services.youtube.model.CommentThread;
import com.google.api.services.youtube.model.V3CommentListResponse;
import com.google.api.services.youtube.model.V3CommentThreadListResponse;
import com.google.common.collect.Lists;

/**
 * This sample creates and manages comments by:
 *
 * 1. Retrieving the top-level comments for a video via "commentThreads.list" method.
 * 2. Replying to a comment thread via "comments.insert" method.
 * 3. Retrieving comment replies via "comments.list" method.
 * 4. Updating an existing comment via "comments.update" method.
 * 5. Sets moderation status of an existing comment via "comments.setModerationStatus" method.
 * 6. Marking a comment as spam via "comments.markAsSpam" method.
 * 7. Deleting an existing comment via "comments.delete" method.
 *
 * @author Ibrahim Ulukaya
 */
public class CommentHandling {

    /**
     * Define a global instance of a YouTube object, which will be used to make
     * YouTube Data API requests.
     */
    private static YouTube youtube;

    /**
     * List, reply to comment threads; list, update, moderate, mark and delete
     * replies.
     *
     * @param args command line args (not used).
     */
    public static void main(String[] args) {

        // This OAuth 2.0 access scope allows for full read/write access to the
        // authenticated user's account and requires requests to use an SSL connection.
        List<String> scopes = Lists.newArrayList("https://www.googleapis.com/auth/youtube.force-ssl");

        try {
            // Authorize the request.
            Credential credential = Auth.authorize(scopes, "commentthreads");

            // This object is used to make YouTube Data API requests.
            youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, credential)
                    .setApplicationName("youtube-cmdline-commentthreads-sample").build();

            // Prompt the user for the ID of a video to comment on.
            // Retrieve the video ID that the user is commenting to.
            String videoId = getVideoId();
            System.out.println("You chose " + videoId + " to subscribe.");

            // Prompt the user for the comment text.
            // Retrieve the text that the user is commenting.
            String text = getText();
            System.out.println("You chose " + text + " to subscribe.");

            // All the available methods are used in sequence just for the sake
            // of an example.

            // Call the YouTube Data API's commentThreads.list method to
            // retrieve video comment threads.
            V3CommentThreadListResponse videoCommentsListResponse = youtube.commentThreads()
                    .list("snippet").setVideoId(videoId).setTextFormat("plainText").execute();
            List<CommentThread> videoComments = videoCommentsListResponse.getItems();

            if (videoComments.isEmpty()) {
                System.out.println("Can't get video comments.");
            } else {
                // Print information from the API response.
                System.out
                        .println("\n================== Returned Video Comments ==================\n");
                for (CommentThread videoComment : videoComments) {
                    CommentSnippet snippet = videoComment.getSnippet().getTopLevelComment()
                            .getSnippet();
                    System.out.println("  - Author: " + snippet.getAuthorDisplayName());
                    System.out.println("  - Comment: " + snippet.getTextDisplay());
                    System.out
                            .println("\n-------------------------------------------------------------\n");
                }
                CommentThread firstComment = videoComments.get(0);

                // Will use this thread as parent to new reply.
                String parentId = firstComment.getId();

                // Create a comment snippet with text.
                CommentSnippet commentSnippet = new CommentSnippet();
                commentSnippet.setTextOriginal(text);
                commentSnippet.setParentId(parentId);

                // Create a comment with snippet.
                Comment comment = new Comment();
                comment.setSnippet(commentSnippet);

                // Call the YouTube Data API's comments.insert method to reply
                // to a comment.
                // (If the intention is to create a new top-level comment,
                // commentThreads.insert
                // method should be used instead.)
                Comment commentInsertResponse = youtube.comments().insert("snippet", comment)
                        .execute();

                // Print information from the API response.
                System.out
                        .println("\n================== Created Comment Reply ==================\n");
                CommentSnippet snippet = commentInsertResponse.getSnippet();
                System.out.println("  - Author: " + snippet.getAuthorDisplayName());
                System.out.println("  - Comment: " + snippet.getTextDisplay());
                System.out
                        .println("\n-------------------------------------------------------------\n");

                // Call the YouTube Data API's comments.list method to retrieve
                // existing comment
                // replies.
                V3CommentListResponse commentsListResponse = youtube.comments().list("snippet")
                        .setParentId(parentId).setTextFormat("plainText").execute();
                List<Comment> comments = commentsListResponse.getItems();

                if (comments.isEmpty()) {
                    System.out.println("Can't get comment replies.");
                } else {
                    // Print information from the API response.
                    System.out
                            .println("\n================== Returned Comment Replies ==================\n");
                    for (Comment commentReply : comments) {
                        snippet = commentReply.getSnippet();
                        System.out.println("  - Author: " + snippet.getAuthorDisplayName());
                        System.out.println("  - Comment: " + snippet.getTextDisplay());
                        System.out
                                .println("\n-------------------------------------------------------------\n");
                    }
                    Comment firstCommentReply = comments.get(0);
                    firstCommentReply.getSnippet().setTextOriginal("updated");
                    Comment commentUpdateResponse = youtube.comments()
                            .update("snippet", firstCommentReply).execute();
                    // Print information from the API response.
                    System.out
                            .println("\n================== Updated Video Comment ==================\n");
                    snippet = commentUpdateResponse.getSnippet();
                    System.out.println("  - Author: " + snippet.getAuthorDisplayName());
                    System.out.println("  - Comment: " + snippet.getTextDisplay());
                    System.out
                            .println("\n-------------------------------------------------------------\n");

                    // Call the YouTube Data API's comments.setModerationStatus
                    // method to set moderation
                    // status of an existing comment.
                    youtube.comments().setModerationStatus(firstCommentReply.getId(), "published");
                    System.out.println("  -  Changed comment status to published: "
                            + firstCommentReply.getId());

                    // Call the YouTube Data API's comments.markAsSpam method to
                    // mark an existing comment as spam.
                    youtube.comments().markAsSpam(firstCommentReply.getId());
                    System.out.println("  -  Marked comment as spam: " + firstCommentReply.getId());

                    // Call the YouTube Data API's comments.delete method to
                    // delete an existing comment.
                    youtube.comments().delete(firstCommentReply.getId());
                    System.out
                            .println("  -  Deleted comment as spam: " + firstCommentReply.getId());
                }
            }
        } catch (GoogleJsonResponseException e) {
            System.err.println("GoogleJsonResponseException code: " + e.getDetails().getCode()
                    + " : " + e.getDetails().getMessage());
            e.printStackTrace();

        } catch (IOException e) {
            System.err.println("IOException: " + e.getMessage());
            e.printStackTrace();
        } catch (Throwable t) {
            System.err.println("Throwable: " + t.getMessage());
            t.printStackTrace();
        }
    }

    /*
     * Prompt the user to enter a video ID. Then return the ID.
     */
    private static String getVideoId() throws IOException {

        String videoId = "";

        System.out.print("Please enter a video id: ");
        BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
        videoId = bReader.readLine();

        return videoId;
    }

    /*
     * Prompt the user to enter text for a comment. Then return the text.
     */
    private static String getText() throws IOException {

        String text = "";

        System.out.print("Please enter a comment text: ");
        BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
        text = bReader.readLine();

        if (text.length() < 1) {
            // If nothing is entered, defaults to "YouTube For Developers."
            text = "YouTube For Developers.";
        }
        return text;
    }
}

For more information, check this related SO question.

有关更多信息,请查看此相关的SO问题。