FluxFiles for Python (server-side token SDK)

Mint FluxFiles JWTs from any Python backend (Django, FastAPI, Flask, …). Tokens are byte-compatible with the PHP core, so non-PHP apps can issue access tokens — including encrypted BYOB (Bring Your Own Bucket) credentials — without running PHP.

This package only issues tokens — it is not a backend. You still run a FluxFiles core service (the file-manager backend that talks to storage; a PHP app, e.g. the Docker image) for the token to authenticate against. fluxfiles-token simply removes the need for your app to be PHP in order to mint those tokens.

Requirements

• Python 3.10+
• A running FluxFiles core service the issued tokens authenticate against (the SDK/iframe endpoint points at it).
• The same FLUXFILES_SECRET your FluxFiles core server uses to verify tokens (HS256, must be ≥ 32 bytes). Keep it server-side only.

Installation

pip install fluxfiles-token

Usage

Mint a token

from fluxfiles_token import create_token

token = create_token(
    user_id="user-42",
    perms=["read", "write"],
    disks=["local", "s3"],
    prefix="users/42",       # scope the user to their own directory
    max_upload_mb=25,
    allowed_ext=["png", "jpg", "pdf"],
    ttl=3600,                # seconds
    # secret=...,            # or omit to read FLUXFILES_SECRET from the environment
)

Role & edition presets

Mint-time-only DX sugar — they expand into ordinary claims and are never themselves a JWT claim. Explicit kwargs always win over a preset default.

from fluxfiles_token import create_token

# perms=["read", "write"], owner_only=True, allow_extract=True,
# allow_chmod=False (the "editor" bundle).
token = create_token(user_id="user-42", role="editor")

# Every module claim the "enterprise" edition grants — license/module
# install are still the real gate; a preset just defaults the per-tenant claim.
token = create_token(user_id="tenant-9", edition="enterprise")

Enable Import from URL

Import-from-URL is off by default. Turn it on for a token by setting the import options — no server-side per-tenant config is needed:

token = create_token(
    user_id="user-42",
    perms=["read", "write"],
    allow_url_import=True,                     # required — enables the feature
    max_import_mb=20,                          # optional — cap per import (MB)
    import_url_allowlist=["*.unsplash.com"],   # optional — restrict source hosts
    # import_path, import_rate_limit, import_concurrency also supported
)

The core then accepts POST /api/fm/import-url for that token (SSRF-guarded, sharing the quota/dedup/variants pipeline). Server-wide defaults come from FLUXFILES_IMPORT_* env vars on the core service.

SFTP disk: chmod & SSH terminal

When the token targets a FluxFiles server that has an SFTP disk configured (SFTP_* env on that server — see the core README), you can hand a token the SFTP file-manager tools. chmod is on by default for SFTP; the SSH terminal is opt-in (it grants shell access as the SSH user):

token = create_token(
    user_id="admin-7",
    perms=["read", "write"],
    disks=["sftp"],           # an SFTP disk configured on the FluxFiles server
    allow_chmod=True,         # cPanel-style permissions (default on for SFTP)
    allow_terminal=True,      # SSH terminal — opt-in, off by default
)

These are standalone-core features: fluxfiles-token mints for a real FluxFiles server (Docker / standalone), which serves them — they aren't available behind the WordPress / Laravel-proxy adapters.

BYOB — encrypt a user's own bucket credentials

import os
from fluxfiles_token import create_byob_token

token = create_byob_token(
    user_id="user-42",
    byob_disks={
        "my-s3": {
            "driver": "s3",
            "key": os.environ["USER_AWS_KEY"],
            "secret": os.environ["USER_AWS_SECRET"],
            "bucket": "user-personal-bucket",
            "region": "us-east-1",
            # "endpoint": "https://<acct>.r2.cloudflarestorage.com",  # R2/MinIO/Spaces
        },
    },
)

Credentials are AES-256-GCM encrypted into the token and decrypted only at runtime by the FluxFiles server (which also re-validates the endpoint for SSRF). role/edition presets are supported on BYOB tokens too.

Verify / decode (optional)

from fluxfiles_token import verify_token, decode_token

claims = verify_token(token)   # checks HS256 signature + expiry, raises on failure
peek = decode_token(token)     # decode only, NO verification — never trust for auth

Django view

from django.http import JsonResponse
from fluxfiles_token import create_token

def fluxfiles_token_view(request):
    token = create_token(
        user_id=str(request.user.id),
        perms=["read", "write"],
        prefix=f"users/{request.user.id}",
    )
    return JsonResponse({"token": token})

FastAPI route

from fastapi import APIRouter, Depends
from fluxfiles_token import create_token

router = APIRouter()

@router.get("/fluxfiles/token")
def fluxfiles_token(user=Depends(get_current_user)):
    return {"token": create_token(user_id=user.id, perms=["read", "write"])}

API

create_token keyword arguments: secret=None, user_id, perms=None, disks=None, prefix=None, max_upload_mb=None, allowed_ext=None, ttl=None, owner_only=None, max_storage_mb=None, max_files=None, edition=None, role=None. Per-tenant overrides (omit to inherit the server default): ai_auto_tag=None (bool), rate_read=None / rate_write=None (req/min), variants=None ({"thumb": .., "medium": .., "large": ..} px), and every other allow_*/module claim documented in docs/CONFIG.md — plus a claims: dict escape hatch for any claim by its raw snake_case name. create_byob_token replaces disks with byob_disks (a map of name → S3-compatible/SFTP config) and does not take max_storage_mb/max_files (matching the core), but accepts the same role/edition/per-tenant kwargs.

Compatibility

Tokens and BYOB blobs are validated against the PHP core in CI: a Python-minted token decodes in JwtCompat::decode, and BYOB credentials round-trip both ways through CredentialEncryptor (HS256 + HKDF-SHA256 + AES-256-GCM). Always mint tokens on the server — never ship FLUXFILES_SECRET to the browser.

License

MIT — see LICENSE for details.

Links

• Main repository: https://github.com/thai-pc/fluxfiles
• Documentation: https://github.com/thai-pc/fluxfiles#python-server-side-token-sdk
• Issues: https://github.com/thai-pc/fluxfiles/issues