fix: dedup duplicate publish dispatches and wait for Toutiao image upload

[xiaopanddxiong]

What & Why

While integrating MultiPost via the REST API for an automated publishing pipeline, I hit two reliability issues. Both are fixed here.

1. Same content gets published 2-3 times per task

Symptom: One REST API task triggers Chrome to instantly open 2-3 publish tabs, and the same content gets posted 2-3 times.

Root cause: When the extension receives NEW_TASK from ping, it opens multipost.app/on-task?taskId=.... That page then dispatches chrome.runtime.sendMessage({ action: "MULTIPOST_EXTENSION_PUBLISH", data }) — but it dispatches it multiple times (likely React StrictMode useEffect double-invocation, or other internal logic). The background handler had no dedup, so each dispatch ran the full publish flow.

I confirmed this by inspecting Service Worker network — only one ping returned NEW_TASK, but chrome.windows.create({ url: "tabs/publish.html" }) was being called 3 times.

Fix (src/background/index.ts):

• Add a 60-second sliding-window dedup keyed by content fingerprint (platforms + image count + first 256 chars of content/title) on the MULTIPOST_EXTENSION_PUBLISH handler.
• Duplicates within the window are dropped with a log line.

Also added a defensive in-memory dedup on NEW_TASK task URLs in src/background/services/api.ts (LRU-capped at 500 entries) to guard against ping returning the same task multiple times.

2. Toutiao dynamic post: image is missing when uploading large images

Symptom: For images larger than ~3-5 MB, the post goes live with no image attached.

Root cause: src/sync/dynamic/toutiao.ts had a hard-coded setTimeout(5000) between dispatching the file input and clicking the upload-confirm button. For large images, 5 seconds isn't enough — the confirm button is still disabled, the click is a no-op, and the post is published without the image.

Fix:

• Replace the fixed 5s wait with a polling loop (max 60s) that waits for button[data-e2e="imageUploadConfirm-btn"] to become non-disabled before clicking.
• After clicking confirm, wait (max 30s) for the modal to disappear and the inserted thumbnail to appear in the editor before proceeding.

How tested

• Triggered a publish task via the REST API with a 5.4 MB PNG.
• Before fix: 3 publish tabs spawned, post sent 3 times, image sometimes missing.
• After fix: exactly 1 publish tab, 1 post on Toutiao with the image attached. Service Worker console shows [MultiPost] skip duplicate PUBLISH request for the suppressed dispatches.

Files changed

• src/background/index.ts — content-fingerprint dedup for MULTIPOST_EXTENSION_PUBLISH
• src/background/services/api.ts — task URL dedup for NEW_TASK
• src/sync/dynamic/toutiao.ts — poll for upload completion instead of fixed 5s wait

No new dependencies, no behavioral change for the happy path.

[leaperone-bot]

🤖 Leo

Code Review

⏳ 等待审查...

_{最后更新: 2026-05-07 15:56 · beb348c}