Hey there, let's work through these Facebook Live Comments API issues you're hitting—they're definitely tricky, but we can break them down step by step.

1. Fixing Missing Comments & Filtered User Comments #

• Double-Check API Permissions: First, confirm your app has the right permissions to access live comments. For Page live streams, you'll need pages_show_list and pages_read_engagement. For user-owned live streams, user_posts or user_videos are required. If your app is public (not in development mode), ensure these permissions are approved by Facebook—unapproved permissions often lead to filtered or missing data.
• Verify Comment Visibility: Some comments might be hidden by the stream's privacy settings (e.g., restricted to a specific audience) or flagged as spam by Facebook's automated moderation. Check the live video's privacy settings in Facebook Studio or the Page/Profile's comment moderation queue to see if the missing comments are there.
• Use the Dedicated Live Comments Endpoint: Don't use the generic /{post-id}/comments endpoint—target the live video directly with /{live-video-id}/comments. This ensures you're pulling comments specifically from the live stream, not the associated static post.
• Explicitly Request Required Fields: Facebook's Graph API only returns fields you explicitly ask for. To get the user ID along with comments, include the from object in your fields parameter:

  GET /{live-video-id}/comments?fields=id,message,from{id,name}
  

  This will return the user's ID in from.id, which is exactly what you need.

2. Resolving Poll-Only Streams with No Comments #

• Confirm Stream Status: Make sure the live stream is actively running—if it's pre-live or already ended, the API might return empty responses. Check the stream's status via the live_video object's status field.
• Check Rate Limits: Facebook enforces strict rate limits for API requests. If you're hitting these limits, you might get empty or truncated responses. You can check your app's rate limit usage in your Facebook Developers account dashboard.
• Switch to Webhooks for Real-Time Updates: Since polling isn't working and you need real-time comments, webhooks are the way to go. They push new comments to your server as they're posted, avoiding delays or missing data. Here's how to set them up:
  1. In your Facebook app's settings, navigate to Webhooks and subscribe to the live_video object.
  2. Select the comments field to receive updates for new comments.
  3. Ensure your webhook endpoint is publicly accessible and can handle POST requests from Facebook (you'll need to verify the endpoint first).
• Debug with Graph API Explorer: Test your requests directly in the Graph API Explorer. If the explorer returns comments but your code doesn't, the issue is likely in your implementation—check authentication tokens, field parameters, or endpoint paths.

3. Getting User IDs (When Polling Doesn't Return from_id) #

• The from_id field isn't a standalone field in the current API, but the from object includes the user's ID. As mentioned earlier, explicitly requesting from{id} in your fields parameter will give you the user ID. For example:

  GET /{live-video-id}/comments?fields=id,message,from{id}
  

  This will include a from object with the id property, which serves the same purpose as the old from_id field.

Quick Additional Tips #

• Test with a Test Stream: Create a test live stream on a test Page or Profile to experiment without affecting real users. This lets you debug permissions and endpoints freely.
• Stay Updated on API Changes: Facebook regularly updates their API—make sure you're using the latest version (v18.0 as of 2024) and check the changelog for any recent changes to live comment endpoints.
• Reach Out to Support: If none of the above fixes work, contact Facebook Developer Support with specific details (live video ID, app ID, request logs) to get tailored help.

内容的提问来源于stack exchange，提问作者mik