Feishu Doc Mirror

feishu-doc-mirror

Turn a shared Feishu article into a faithful copy in the user's own Feishu space:

1. resolve the real document behind the URL (a community card only links to the body)
2. clone it — natively if allowed, otherwise rebuild text + recovered images
3. verify the copy matches the source (image / heading / callout / text counts)

Title follows the user convention 名称_YYYYMMDD.

When to invoke

User provides a Feishu URL — feishu.cn/community/prompts?id=..., or a shared *.feishu.cn/docx/<token> / /wiki/<token> — and wants the whole article saved/cloned/mirrored into their own Feishu cloud doc. Especially relevant when native "创建副本"/export is greyed out (author disabled copy).

If the user instead wants a local Word/PDF of a generic JS site, use spa-to-pdf. If they only want to read a Feishu doc, use lark-doc directly.

Prerequisites

• lark-cli installed and auth login done (user identity). See lark-shared.
• Python 3.10+ with Playwright (only the image-recovery step needs it):

  pip install playwright
  playwright install chromium
  

• The image-recovery step requires the source doc to be anonymously viewable (community-shared docs are). If it needs login, that step fails — fall back to a text-only mirror and tell the user images couldn't be fetched.

All scripts live in scripts/. Run them from one scratch working dir (e.g. mirror_work/); they read/write raw/, clone_imgs/, seg/, plan.json.

Strategy ladder (cheapest first)

0. Resolve the source

python scripts/resolve_source.py "<input_url>" --out raw

Writes raw/source.json = {kind, docx_token, docx_url, title, worksLink, author}.

• community card → parses embedded _ROUTER_DATA, reads promptData.worksLink
• /docx//wiki/ link → uses it directly

1. Fetch the body text (read API — usually works even when export is blocked)

lark-cli docs +fetch --api-version v2 --doc "<docx_token>" --doc-format markdown --as user --json |
  Out-File -Encoding utf8 raw/doc_raw.json
python -c "import json; d=json.load(open('raw/doc_raw.json',encoding='utf-8-sig')); open('raw/doc_content.md','w',encoding='utf-8').write(d['data']['document']['content'])"

lark-cli JSON output carries a UTF-8 BOM → always parse with utf-8-sig.

2. Try the native clone first (best fidelity, one round-trip)

lark-cli drive +export --token "<docx_token>" --doc-type docx --file-extension docx --output-dir . --overwrite --as user --json
# if ok -> lark-cli drive +import ...  (into the user's space) -> DONE

If this returns no permission (code 1069902) or 403, the author disabled copy/export → go to step 3 (rebuild). Do not keep retrying.

3. Rebuild (text + recovered images)

# 3a. recover every image by rendering the public doc and intercepting bytes
python scripts/capture_images.py "<docx_url>" --md raw/doc_content.md --out clone_imgs
# 3b. turn fetched markdown + images into ordered build segments
python scripts/preprocess.py --md raw/doc_content.md --manifest clone_manifest.json --source raw/source.json
# 3c. linear build: create + append text + insert images (order preserved)
python scripts/build.py --plan plan.json

build.py prints the new clone's document_id + URL and records progress in build_state.json (re-run to resume after a mid-way failure).

4. Verify before reporting success

python scripts/verify.py --clone "<new_token>" --source-md raw/doc_content.md

Confirms the clone's image / callout / table / code-block / heading counts match the source and spot-checks Chinese phrases for ? corruption. Always run it.

Important behaviors

• --content @file, never piped stdin. PowerShell 5.1 pipes to native exes as GBK and silently turns 中文/emoji into ?. All create/append calls read content from a UTF-8 file via --content @path. (build.py already does this.)
• --doc-format markdown faithfully renders Feishu's hybrid markdown — <callout> (emoji kept), tables, code fences, blockquotes, bold, links all survive a fetch→create round-trip. Verified.
• media-insert is append-only. Positioning is achieved by building the doc top-to-bottom (linear append), so every text/image lands at the end in order. Do not try to move blocks afterward.
• Images are protected — media-download returns 403 cross-tenant. They are recovered only by rendering the public page and intercepting the image bytes.
• Don't recursively expand linked sub-docs (<cite> wiki refs) — keep them as hyperlinks to the originals, like spa-to-pdf's "inline links only" rule.
• Title gets the _YYYYMMDD suffix (creation day) per the user convention.

For the full list of edge cases and why each fix exists, read references/pitfalls.md before changing any script — several "obvious" simplifications reintroduce bugs already fixed.

Cleanup

Throwaway/verification docs are deleted with lark-cli drive +delete --file-token <token> --type docx --as user --yes (note: --file-token, not --token; docx delete is high-risk-write, needs --yes).