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serverAppConfigs/serverAppConfigs-docs/Dankserver/Copyparty.md
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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 to y to 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 thumbex framework. Requires configuration in initcfg.

See Also