MirrorURL
Security-hardened remote directory mirroring tool. MirrorURL recursively discovers files behind an HTTP(S) directory listing and mirrors them locally with adaptive concurrency, resumable/partial downloads, integrity verification, and an SSRF-hardened transport layer.
Features
- Recursive discovery of remote directory trees (BFS, depth/exclude limits, cycle-safe).
- True parallel downloads — multiple files and multiple chunks per file concurrently.
- Adaptive async concurrency that tunes itself to server RTT, throughput, and error rate.
- Resumable & partial downloads with HTTP range requests and chunk assembly.
- Integrity checks — size/timestamp comparison, ETag handling, and verified byte ranges; no comparison against a remote cryptographic content digest.
- Resilience — per-domain circuit breakers, exponential backoff, rate limiting.
- Security — path-traversal and symlink-bomb defenses, private-IP/SSRF guards, URL-scope enforcement.
- Operability — metrics collection, multi-level progress, optional HTTP health-check server.
- Caching — directory listings and file metadata; discovery currently keeps the remote file list in memory.
Installation
Python 3.9 or newer is required. Install the published package from PyPI in a virtual environment:
python3 -m venv .venv
source .venv/bin/activate
python -m pip install --upgrade pip
python -m pip install mirror-url
To include all optional acceleration, progress, and monitoring packages:
python -m pip install "mirror-url[all]"
Upgrade an existing installation:
python -m pip install --upgrade mirror-url
Check the installed package and CLI:
python -m pip check
mirror-url --version
mirror-url --help
Core dependencies: httpx[http2], pydantic (v2), PyYAML. Optional extras:
fast (stringzilla, lxml), progress (tqdm), monitor (psutil), and all
(all optional runtime packages). Contributor setup is described below.
Usage
Run via the console entry point or the module:
mirror-url --url https://example.com/files/ --dest-path ./mirror --log-path ./mirror-log
# or
python -m mirror_url --url https://example.com/files/ --dest-path ./mirror --log-path ./mirror-log
Run mirror-url --help for the full option list.
Configuration can also be supplied via a YAML file (see MirrorConfig /
load_config_from_args).
📖 Full documentation: see the User Guide (HTML version) for detailed installation, CLI reference, config-file format, download modes, security notes, the Python API, and troubleshooting.
🛠 Contributing to the code? The Developer Guide
(HTML version) is an architecture deep-dive:
dependency layers, the MirrorURL mixin design, runtime data flow, and
step-by-step extension recipes.
Development
From a repository checkout, create and activate a virtual environment, then install the editable package with its runtime extras and development tools:
python3 -m venv .venv
source .venv/bin/activate
python -m pip install -e ".[all,dev]"
pre-commit install
ruff check . # lint
ruff format --check . # format check (Ruff 0.16.8)
mypy # type-check the package
pytest -m "not integration" # fast test lane
pytest # full suite (includes integration)
Continuous integration runs lint + tests across Python 3.9–3.14 (see
.github/workflows/ci.yml).
Project layout
src/mirror_url/ # the package (dependency-layered)
tests/ # pytest suite
REFACTORING_PLAN.md # module breakdown + migration roadmap
CHANGELOG.md # notable changes (Keep a Changelog format)
CONTRIBUTING.md # dev setup, checks, conventions
pyproject.toml # packaging, deps, tool config
Contributing
Contributions are welcome — see CONTRIBUTING.md for the dev setup, the checks CI runs, and the project conventions (dependency layering, lint policy, behavior-preserving refactors). Notable changes are tracked in CHANGELOG.md.
Authors
Borut Podlipnik, Max-Planck-Institute for Solar System Research, podlipnik@mps.mpg.de
License
MIT © BP
1 maintainer
Metadata
1 maintainer
Release files for mirror-url 3.1.78
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| mirror_url-3.1.78.tar.gz | 323.9 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| mirror_url-3.1.78-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 534.2 kB
Release files / mirror_url-3.1.78.tar.gz
| Download URL | mirror_url-3.1.78.tar.gz |
|---|---|
| Size | 323.9 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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Yes |
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Transparency logRelease files / mirror_url-3.1.78-py3-none-any.whl
| Download URL | mirror_url-3.1.78-py3-none-any.whl |
|---|---|
| Size | 210.3 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
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PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
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