All in-repo path references (AGENTS.md, README, old scripts, report artifacts,
test code paths) rewritten in the same commit; focused-test map extended for
.gitignore, old/scripts/*, dankclaw/comfyui/*, and report/* per this repo's
own convention ('add one before committing'). Obsidian wikilinks are
title-based and unaffected.
3.9 KiB
Copyparty
Copyparty is a lightweight file server and media streamer that runs as a single Python binary. It handles large payloads, media streaming, resumable uploads, directory browsing, and WebDAV from one process.
Host: Dankserver — Hostname: files.dankserver.local — Docs: https://github.com/9001/copyparty
Facts
| Item | Value |
|---|---|
| Latest version | v1.20.21 (2026-08) |
| Image | ghcr.io/9001/copyparty:latest (official Dockerfile in repo) |
| Port | 3923 (host) → 3923 (container) |
| Volume | bind mount the shared root directory |
| Auth | Per-directory .cpy config files, HTTP basic auth, dirkeys, filekeys |
| Streaming | HTTP range requests, HLS, WebDAV, WOPI (Office editing) |
| Docker editions | dj (document + media), iv (image + video), v (video only) |
Configuration
Environment Variables
| Variable | Description |
|---|---|
COPAY_PASS |
Master password for the web UI |
COPAY_MODE |
Set to rw for read-write shares |
Configuration File Options
Copyparty reads its configuration from initcfg (or config in the /data directory). Key options:
use-bwrap: n— Disable bwrap sandboxing for ffmpeg (default in Docker). Set toyto enable.shadowing //NULL— Full unmap of a volume from the filesystem.- Config env-var expansion: Use
${VAR}syntax in[global]section for environment variable substitution.
Docker Editions
Different editions bundle different libraries:
| Edition | Bundled Libraries | Use Case |
|---|---|---|
dj |
Document + image + video libraries | Full-featured server |
iv |
Image + video libraries | Image and video focused |
v |
Video only | Transcoding only, minimal footprint |
The iv edition is no longer available for arm32/armv6. Use dj for maximum compatibility.
Volumes
| Container path | Host path (convention) |
|---|---|
/data |
/opt/copyparty/data |
Docker Compose
services:
copyparty:
image: ghcr.io/9001/copyparty:latest
container_name: copyparty
restart: unless-stopped
environment:
COPAY_PASS: "${COPAY_PASS}"
COPAY_MODE: rw
ports:
- "3923:3923"
volumes:
- /opt/copyparty/data:/data
healthcheck:
test: ["CMD", "python3", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:3923/')"]
interval: 30s
timeout: 10s
retries: 3
Healthcheck
A simple HTTP check on port 3923 works. The root path returns HTTP 200 with the directory listing.
WOPI Integration
Copyparty v1.20.9+ supports WOPI (Web Application Open Platform Interface) for editing Office documents in the web UI via Collabora Online. Enable with the --wopi-accs flag to limit WOPI access to specific paths.
Security Advisories
| Version | CVE | Issue |
|---|---|---|
| v1.20.19 | GHSA-phv8-wgjp-g4p9 | FTP upload outside volume |
| v1.20.17 | GHSA-x5pq-m9p8-f4vx | dirkey/filekey confusion |
| v1.20.9 | CVE-2026-27948 / GHSA-62cr-6wp5-q43h | XSS via file upload |
Upgrade to v1.20.19+ to cover all known CVEs. The dirkey fix (v1.20.17) matters if using both dirkeys and filekeys.
Gotchas
- Large transfers: Disable TLS inside the app and let Caddy terminate TLS. This avoids double encryption overhead.
- Dedicated share directory: Do not give Copyparty the whole disk. Mount only the intended share path.
- Upload tokens scoped per folder: Prevents accidental global write access.
- CSP nonces (v1.20.17+): Security hardening for JavaScript execution. May break third-party JS plugins (
--js-browser/--html-head). - Custom thumbnail extractors (v1.20.19+): New
thumbexframework. Requires configuration ininitcfg.
See Also
- Dankserver Stack
- Caddy — TLS termination and authentication in front
- ARR-Stack — Copyparty as a viewer alongside automated download management