cs-demo-downloader 0.1.1

Download Counter-Strike demos from 5EPlay, Perfect World Arena, and Steam share-code sources.

CS Demo Downloader

CS Demo Downloader downloads Counter-Strike demo files from supported Chinese CS platforms. It provides a scriptable CLI, a Python API, and a Docker entrypoint for scheduled/server usage.

中文文档

Table of Contents

• Quick Start
• Supported Platforms
• Configuration
• Install
• CLI Usage
• Docker Usage
• Python API Usage
• Scheduled Downloads
• Tests
• Notes and Limitations
• License

Supported Platforms

The current implementation supports three platforms:

Platform	CLI value	Required account fields	Notes
5EPlay	5e	userid	The user id is read from a 5E player profile URL.
Perfect World Arena	pwa	steamid, access_token	Requires a valid Perfect World Arena web/client token. Demo URLs are signed before download.
Steam official matchmaking	steam	steamid, api_key, steamidkey, knowncode	Implements Steam Web API share-code iteration. Real replay URL resolution still requires Steam Game Coordinator full match info.

No other platforms are implemented at the moment.

Features

• Download demos from 5EPlay, Perfect World Arena, and Steam official matchmaking.
• Use CLI automation or import the Python API directly.
• Docker image for server and scheduled downloads.
• Automatically extracts downloaded ZIP and BZ2 demo archives.
• Rejects unsafe ZIP entries that try to extract outside the target directory.
• Fails fast for explicit missing or malformed CLI config files.

Quick Start

Use Docker if you want the simplest scheduled/server setup:

mkdir -p config demos
cp config.jsonc.example config/config.jsonc
# Edit config/config.jsonc before running the container.

docker run --rm \
  -v "$(pwd)/config:/config" \
  -v "$(pwd)/demos:/demos" \
  ghcr.io/wangchudi/cs-demo-downloader:latest

Use a local Python install if you want CLI/API development from a clone:

pip install "$(python scripts/select_private_signer_wheel.py wheelhouse)"
pip install -e .
cs-demo-downloader --help

PWA downloads require the private compiled cs-demo-pwa-signer wheel. Public tests mock that boundary.

Project Layout

Repository layout

.
├── pyproject.toml         # Python package metadata
├── cli.py                 # Compatibility CLI wrapper
├── src/cs_demo_downloader/ # Installable Python package
├── tests/                 # unittest test suite
├── Dockerfile
├── docker-compose.yml
├── config.jsonc.example
└── requirements.txt

Requirements

• Python 3.11+ recommended.
• CLI/runtime dependencies are declared in pyproject.toml. requirements.txt is kept for compatibility.
• Docker, if you want containerized execution.

Use python3 on Linux/macOS if python is not mapped to Python 3.

Configuration

Copy the JSONC example config and fill in your account information:

cp config.jsonc.example config.jsonc

The loader accepts both the new nested JSONC schema and the previous config.json schema for backward compatibility. label replaces name as the clearer display-only field; old name values are still accepted when loading legacy configs.

Full JSONC schema example

Example schema:

{
  // "." downloads into the current working directory.
  "download_path": ".",
  "five_e": {
    "users": [
      {
        "label": "example_5e_user", // Display-only label.
        "userid": "YOUR_5E_USERID_HERE"
      }
    ]
  },
  "pwa": {
    "default_access_token": "SHARED_PWA_ACCESS_TOKEN",
    "signature_provider": "compiled",
    "pvp_alive_dll": "cache/PvpAlive.dll",
    "pvp_alive_bridge_exe": "",
    "pvp_alive_wine_executable": "wine",
    "pvp_alive_timeout": "10",
    "users": [
      {
        "label": "pwa_target_1",
        "steamid": "TARGET_STEAM_ID_1"
      },
      {
        "label": "pwa_target_2",
        "steamid": "TARGET_STEAM_ID_2"
      },
      {
        "label": "pwa_target_with_custom_token",
        "steamid": "TARGET_STEAM_ID_3",
        "access_token": "OPTIONAL_TARGET_SPECIFIC_PWA_ACCESS_TOKEN"
      }
    ]
  },
  "steam": {
    "users": [
      {
        "label": "example_steam_user",
        "steamid": "YOUR_STEAM_ID64_HERE",
        "api_key": "YOUR_STEAM_WEB_API_KEY_HERE",
        "steamidkey": "YOUR_STEAM_ID_KEY_HERE",
        "knowncode": "CSGO-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx"
      }
    ],
    "resolver": {
      "type": "boiler",
      "executable_path": "boiler-writter",
      "auto_download": "true",
      "cache_dir": "",
      "timeout": "60"
    },
    "gc": {
      "username_env": "STEAM_GC_USERNAME",
      "password_env": "STEAM_GC_PASSWORD",
      "two_factor_secret_env": "STEAM_GC_TWO_FACTOR_SECRET",
      "auth_code_env": "STEAM_GC_AUTH_CODE",
      "sentry_dir": "",
      "timeout": "30"
    }
  }
}

Platform credential notes

5EPlay User ID

Open a 5E player profile URL and use the profile id segment. For example:

https://www.5eplay.com/player/11814738gjdwn7

The userid value is 11814738gjdwn7.

Perfect World Arena Steam ID and Access Token

1. Log in to the Perfect World Arena web page or client.
2. Open browser developer tools.
3. Inspect authenticated network requests or cookies.
4. Fill pwa.default_access_token and each target steamid in config.jsonc.

PWA demo download links are now generated with the current signed query parameters and the downloader sends the required PWA request headers for the final file request. Tokens can expire. If PWA downloads stop working, refresh the token first.

PWA signing is provided by the private compiled cs-demo-pwa-signer wheel. The public downloader repository does not include the signing algorithm source. The s parameter calculation was obtained through reverse-engineering work by Sisyphus; to reduce ongoing maintenance burden, it has been packaged into the wheel and does not affect normal downloader usage. Install the private wheel before using PWA downloads; see docs/private-pwa-signer-wheel.md for the required wheel contract and verification checklist. If another project wants to implement demo downloading without relying on this pip package, contact [e-mail].

If one PWA access token can access multiple target Steam accounts, set it once as pwa.default_access_token and add one pwa.users entry per target steamid. A user-specific access_token can override the default for a single target.

Steam Official Matchmaking Credentials

Steam official matchmaking support uses Valve's ICSGOPlayers_730/GetNextMatchSharingCode/v1 Web API. You need:

1. steamid: your SteamID64.
2. api_key: a Steam Web API key from https://steamcommunity.com/dev/apikey.
3. steamidkey: the match sharing authentication key shown by CS2/CS:GO.
4. knowncode: one existing official matchmaking share code, used as the cursor for fetching newer matches. The API returns the next share code after knowncode; the downloader can iterate share codes locally. Steam does not expose the final replay URL through this Web API alone. A real .dem.bz2 URL must be read from Steam Game Coordinator full match info, typically the match map field. Until a GC resolver is configured, the Steam platform will report that no real replay URL can be resolved instead of returning a fake download URL.

Steam Demo URL Resolvers

Steam official matchmaking has two optional resolver backends:

• boiler: local-machine backend using akiver/boiler-writter. Steam must be running and logged in on the same machine. This avoids storing Steam passwords and is recommended for local CLI usage. Configure steam.resolver.type = "boiler". Set steam.resolver.auto_download = "true" to download the latest boiler-writter release into the local cache automatically, or set steam.resolver.executable_path to a manually installed binary.
• steam-login: headless backend using optional steam/csgo dependencies. It reads credentials only from environment variables such as STEAM_GC_USERNAME and STEAM_GC_PASSWORD; do not store Steam credentials in your config file. Live Steam login still requires a real account and cannot be verified by local unit tests.

Docker images do not bundle boiler-writter and cannot use the local Steam resolver unless you provide a working Steam client environment yourself.

When working from a local clone, install optional resolver dependencies as needed:

pip install -e .[steam-boiler]
pip install -e .[steam-login]

Install

Install the latest release from PyPI:

pip install cs-demo-downloader

Optional extras:

# Steam official matchmaking resolver using local Steam + boiler-writter parser deps
pip install "cs-demo-downloader[steam-boiler]"

# Steam official matchmaking resolver using steam-login/csgo GC deps
pip install "cs-demo-downloader[steam-login]"

You can also install the current main branch directly from GitHub:

pip install git+https://github.com/WangChuDi/CS-Demo-Downloader.git

For local development from this repository, use editable installs instead:

pip install "$(python scripts/select_private_signer_wheel.py wheelhouse)"
pip install -e .

On Windows PowerShell:

$wheel = python scripts/select_private_signer_wheel.py wheelhouse
pip install $wheel
pip install -e .

The private signer wheel is required only for real PWA signing. Public tests mock that boundary.

The package installs this console command:

• cs-demo-downloader - CLI downloader.

CLI Usage

Common commands:

Task	Command
Show help	cs-demo-downloader --help
Download all configured platforms	cs-demo-downloader download --all --config config.jsonc
Download 5EPlay only	cs-demo-downloader download --platform 5e --config config.jsonc
Download PWA only	cs-demo-downloader download --platform pwa --config config.jsonc
Download Steam only	cs-demo-downloader download --platform steam --config config.jsonc
Refresh cached PWA DLL manually	cs-demo-downloader update-pvpalive-dll --target cache/PvpAlive.dll

CLI command examples and notes

Show help:

cs-demo-downloader --help
cs-demo-downloader download --help

Download all configured platforms:

cs-demo-downloader download --all --config config.jsonc

Download only 5EPlay demos:

cs-demo-downloader download --platform 5e --config config.jsonc

Download only Perfect World Arena demos:

cs-demo-downloader download --platform pwa --config config.jsonc

Download only Steam official matchmaking demos:

cs-demo-downloader download --platform steam --config config.jsonc

Update the cached PWA PvpAlive.dll explicitly without downloading the full official client ZIP:

cs-demo-downloader update-pvpalive-dll --target cache/PvpAlive.dll

This command reads the official latest.yml, derives the matching ZIP URL, uses HTTP Range requests to fetch only the ZIP tail, central directory, local header, and compressed plugin/PvpAlive.dll data, validates size and CRC32, then atomically replaces the target cache file. It writes version metadata next to the DLL as PvpAlive.dll.json; if the cached metadata already matches the latest client, the DLL data is not downloaded again. Pass --force to refresh anyway. It does not modify the installed Perfect World Arena client and is not used by the normal Python signing path unless you explicitly call it.

Override the configured download directory:

cs-demo-downloader download --all --config config.jsonc --output ./demos

When --config is provided explicitly, the CLI exits with a non-zero status if that file is missing or invalid. This is intentional so Docker, cron, and other automation can detect configuration problems.

Python API Usage

You can also use the installed package from your own Python scripts. The public modules are small function wrappers around each platform downloader plus the shared download/extract helpers.

Python examples

5EPlay

from cs_demo_downloader.core.downloader_5e import get_all_demo_urls
from cs_demo_downloader.core.utils import download_and_extract

demo_urls = get_all_demo_urls("YOUR_5E_USERID")

for match_id, demo_url in demo_urls.items():
    print("downloading", match_id)
    download_and_extract(demo_url, "./demos")

Perfect World Arena / PWA

PWA downloads need both the signed URL and the PWA download headers. Do not print or persist generated URLs because they contain access_token.

from cs_demo_downloader.core.downloader_pwa import (
    build_download_headers,
    get_all_demo_urls,
)
from cs_demo_downloader.core.utils import download_and_extract

steamid = "YOUR_STEAM_ID64"
access_token = "YOUR_PWA_ACCESS_TOKEN"

headers = build_download_headers(steamid)
demo_urls = get_all_demo_urls(steamid, access_token, size=20)

for match_id, demo_url in demo_urls.items():
    print("downloading", match_id)
    download_and_extract(demo_url, "./demos", headers=headers)

If you only need the signed URL for integration with another downloader:

from cs_demo_downloader.core.downloader_pwa import get_demo_url

demo_url = get_demo_url("MATCH_ID", "YOUR_PWA_ACCESS_TOKEN")

Steam Official Matchmaking

Steam Web API share-code iteration is available through downloader_steam. A real replay URL still requires a Steam GC resolver such as the built-in boiler-writter resolver.

from cs_demo_downloader.core.downloader_steam import get_all_demo_urls
from cs_demo_downloader.steam.boiler_resolver import BoilerWritterResolver

resolver = BoilerWritterResolver(auto_download=True)

demo_urls = get_all_demo_urls(
    api_key="YOUR_STEAM_WEB_API_KEY",
    steamid="YOUR_STEAM_ID64",
    steamidkey="YOUR_MATCH_SHARING_AUTH_KEY",
    knowncode="CSGO-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx",
    demo_url_resolver=resolver.resolve_demo_url,
)

Config helpers

To reuse the same JSONC config file as the CLI:

from cs_demo_downloader.core.config import load_config

config = load_config("config.jsonc")
for user in config.get_users_pwa():
    print(user.label, user.steamid)

PWA DLL cache updater

The updater is available as a Python function if you need to refresh a cached PvpAlive.dll for a separate integration:

from cs_demo_downloader.pwa_dll_updater import update_cached_pvp_alive_dll

dll_path = update_cached_pvp_alive_dll(target_path="cache/PvpAlive.dll", force=False)
print(dll_path)

The current downloader uses the private compiled signer wheel by default on every platform. If you explicitly need the DLL fallback, set pwa.signature_provider to one of these values:

• compiled: default private compiled wheel signer; no DLL or Wine involved.
• pvp_alive_native: call the packaged 32-bit bridge directly on Windows.
• pvp_alive_wine: call the packaged 32-bit bridge through Wine on Linux.

The DLL is never committed or bundled. Refresh it explicitly when needed:

cs-demo-downloader update-pvpalive-dll --target cache/PvpAlive.dll

Python users can also call the bridge helper directly:

from cs_demo_downloader.pwa_bridge import call_pvp_alive_swap_data

signature = call_pvp_alive_swap_data(
    dll_path="cache/PvpAlive.dll",
    inner_json='{"your":"payload"}',
)

Linux Wine usage is explicit:

from cs_demo_downloader.pwa_bridge import call_pvp_alive_swap_data_wine

signature = call_pvp_alive_swap_data_wine(
    dll_path="cache/PvpAlive.dll",
    inner_json='{"your":"payload"}',
)

macOS users should use a macOS-compatible private signer wheel; this project does not include a macOS Wine/QEMU fallback.

Docker Usage

Published GitHub Container Registry images:

Image	Platforms	Notes
ghcr.io/wangchudi/cs-demo-downloader:latest	linux/amd64, linux/arm64	Default image. Uses the private compiled signer wheel and does not include Wine.
ghcr.io/wangchudi/cs-demo-downloader:latest-wine	linux/amd64	Wine-enabled image for explicit pvp_alive_wine DLL bridge use.

Pull the default image:

docker pull ghcr.io/wangchudi/cs-demo-downloader:latest

Images are published automatically when a v* Git tag is pushed or a GitHub Release is published. Release images are tagged as latest, the full semantic version such as 0.1.0, and shorter version aliases such as 0.1 and 0 when applicable.

Wine-enabled images are published separately with a -wine suffix, for example:

docker pull ghcr.io/wangchudi/cs-demo-downloader:latest-wine

The Wine image is currently built for linux/amd64 only because the packaged PWA bridge is a 32-bit Windows executable.

Run once with mounted config and output directories:

mkdir -p config demos
cp config.jsonc.example config/config.jsonc
# Edit config/config.jsonc before running the container.

docker run --rm \
  -v "$(pwd)/config:/config" \
  -v "$(pwd)/demos:/demos" \
  ghcr.io/wangchudi/cs-demo-downloader:latest

Because Docker uses an explicit config path, /config/config.jsonc must exist and be valid.

Local Docker builds, Wine image, and Compose

You can also build the image locally from this repository:

cp /path/to/cs_demo_pwa_signer-0.1.0-*.whl wheelhouse/
docker build --build-arg PYTHON_VERSION=3.12 -t cs-demo-downloader .
docker build --build-arg PYTHON_VERSION=3.12 -f Dockerfile.wine -t cs-demo-downloader:wine .

Prepare mounted directories and config:

mkdir -p config demos
cp config.jsonc.example config/config.jsonc
# Edit config/config.jsonc before running the container.

Run once:

docker run --rm \
  -v "$(pwd)/config:/config" \
  -v "$(pwd)/demos:/demos" \
  ghcr.io/wangchudi/cs-demo-downloader:latest

The Docker entrypoint runs:

cs-demo-downloader download --all --config /config/config.jsonc --output /demos

The default Linux container uses the private compiled signer wheel and does not include Wine. If you want to refresh a cached DLL, mount a cache directory and run the updater explicitly:

docker run --rm \
  -v "$(pwd)/cache:/cache" \
  ghcr.io/wangchudi/cs-demo-downloader:latest \
  update-pvpalive-dll --target /cache/PvpAlive.dll

To use the Linux Wine bridge image, switch to the -wine tag and set the config to "signature_provider": "pvp_alive_wine" with "pvp_alive_dll": "/cache/PvpAlive.dll":

docker run --rm \
  -v "$(pwd)/config:/config" \
  -v "$(pwd)/demos:/demos" \
  -v "$(pwd)/cache:/cache" \
  ghcr.io/wangchudi/cs-demo-downloader:latest-wine

Docker Compose

docker compose run --rm cs-demo-downloader

docker-compose.yml uses ghcr.io/wangchudi/cs-demo-downloader:latest by default and mounts ./config, ./demos, and ./cache. To run the Wine variant:

docker compose --profile wine run --rm cs-demo-downloader-wine

Scheduled Downloads

Example crontab entry for a daily 03:00 run:

0 3 * * * docker run --rm -v /home/user/config:/config -v /home/user/demos:/demos ghcr.io/wangchudi/cs-demo-downloader:latest

Make sure /home/user/config/config.jsonc exists before scheduling the job.

Tests

Run the local unittest suite:

python3 -m unittest discover

Run a syntax/bytecode check:

python3 -m compileall src tests cli.py

The tests are local and deterministic. They do not require real 5EPlay/PWA/Steam credentials or network access. The install tests create temporary virtual environments, install the package with pip install, and verify that the installed package contains the bundled signer manifest, loads the matching vendored signer binary from site-packages, and relies on pip build isolation to provide the wheel build dependency instead of requiring a manual wheel install.

Notes and Limitations

• The project currently supports 5EPlay and Perfect World Arena downloads. Steam official matchmaking share-code iteration is implemented, but real Steam replay URL resolution requires a Steam GC full-match-info resolver.
• PWA access tokens may expire and must be refreshed manually.
• Demo availability depends on the upstream platform APIs.
• Downloaded files and local configs are intentionally ignored by git.
• Cached PvpAlive.dll files under cache/ or vendor/PvpAlive/ are intentionally ignored by git and must not be committed.
• PWA signing requires the private cs-demo-pwa-signer wheel. The public source tree must not contain the signer algorithm source or an sdist for that package. If another project wants to implement demo downloading without relying on this pip package, contact [e-mail].
• A 32-bit Windows C++ bridge executable is packaged for explicit DLL fallback use. Linux uses the private compiled signer by default; Wine is available only through the explicit pvp_alive_wine provider or *-wine Docker image. QEMU fallback is intentionally not included.

License

This project is licensed under the MIT License. See LICENSE for details.

If you believe any content in this project infringes your rights, please contact the maintainer by opening a GitHub issue or emailing [e-mail].