social-auto-publisher

Multi-platform social posting via Playwright scripts + Chrome MCP (real browser). Douyin · Xiaohongshu · TikTok · Reddit · X.

多平台社媒自动发布:Playwright 脚本 + Chrome MCP 真实浏览器,双路线。中英 5 平台。

Why this exists

Most auto-poster repos just hand you Selenium/Playwright code. The code was never the hard part — getting past each platform's anti-bot walls is. This repo documents the techniques that actually work, with 16 real pitfalls written up in the SOPs.

别的仓库只丢代码。难点从来不是代码,是怎么真的绕过平台反爬。这里把实战管用的技术连同 16 个踩坑全写进 SOP。

Two routes

Route	Engine	Platforms	When to use
Scripted	Playwright (channel:chrome, persistent profile)	Douyin · TikTok · Reddit · X	batch / scheduled
Real browser	Chrome MCP	Xiaohongshu	real fingerprint, toughest anti-bot

What actually works (the hard-won bits)

• Douyin image upload — the browser-extension file_upload API is sandboxed (only session-attached files), and the native OS file dialog is unreachable from DOM automation. Fix: Playwright setInputFiles → CDP DOM.setFileInputFiles, which bypasses both.
• Reddit anti-bot — a fresh blank profile hitting old.reddit/submit gets a network policy block (whoa there, pardner!). What gets through: one continuous session (homepage → log in → submit, never split into separate runs) + real login cookies + www.reddit.com. You model a real user, not a stealthier bot.
• new reddit shadow DOM — title/body are web components; getByPlaceholder / [contenteditable] resolve as "not visible". Coordinate clicks + keyboard input get in.
• Anti-detection — navigator.webdriver stripped; --disable-blink-features=AutomationControlled; persistent profile so cookies/history look human.

Platforms

Platform	Route	Status
Douyin 抖音	Playwright	✅ verified — posted successfully
Reddit	Playwright	✅ verified — full flow to submit
TikTok	Playwright + proxy	🟡 ready, not e2e-tested
X (Twitter)	Playwright adapter	⚪ works, not tested in this repo
Xiaohongshu 小红书	Chrome MCP	⚪ route proven, not scripted here

Quick start

npm install                       # playwright-core only — reuses system Chrome, no 150MB download
node douyin-test.mjs login        # scan QR once; the profile persists for reuse
node douyin-test.mjs send img.png # fill content → human-confirm gate → publish

Each script exposes login / publish / send / check style modes — see the SOPs.

Architecture

• playwright-core + channel:chrome — reuse the system Chrome, skip the browser download
• launchPersistentContext with an isolated userData dir — log in once per platform, reuse forever
• human-confirmation gate — scripts fill everything, screenshot, then wait for a go-signal before clicking publish (publishing is irreversible)

Deep dives

• Douyin SOP — why extensions fail, sandbox bypass, content-review flags
• Reddit SOP — beating network policy, shadow-DOM coordinate input, private-subreddit detection

Caveats

• Coordinate clicks assume a 1366×900 viewport — adjust if yours differs.
• TikTok needs an overseas proxy (a mainland-CN IP is an instant block).
• Use it on your own accounts, respect each platform's ToS and rate limits. Fresh accounts spamming links get banned — warm them up first.

License

MIT