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add basic upload/download

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sam 2023-10-01 03:39:06 +02:00
parent 1d2c06fc9a
commit e2217fbc1d
Signed by: sam
GPG key ID: B4EF20DDE721CAA1
17 changed files with 723 additions and 12 deletions
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19
.env.example
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@ -1 +1,20 @@
# The number of workers the server will use. Flask recommends (cpu count * 2) as a baseline.
WORKERS=4
# The secret key used for tokens. You can generate one with (for example) `openssl rand -base64 48`.
SECRET_KEY=change-me-insecure!-Fj+4Y8afr3TzLpG1bkSYQxEVrhGPr5nokxBs9JPxfuvv
# The database file used
DATABASE=data/db.sqlite
# The base URL used for uploaded files.
# This should include the schema (http:// or https://) and not have a trailing slash.
BASE_URL=http://localhost:5000
# The storage backend used, can be 'local' or 's3'
STORAGE_BACKEND=local
# The directory files are uploaded to with the local setting, relative to the working directory.
STORAGE_LOCAL_DIR=data/uploads
# The maximum uploaded file size, in megabytes. Setting this to 0 or a negative number allows unlimited file sizes.
MAX_FILE_SIZE=15
# The maximum content length Flask will accept. This should generally be slightly higher than MAX_FILE_SIZE.
MAX_CONTENT_LENGTH=16

5
.gitignore vendored
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@ -1,5 +1,6 @@
.env
data/
data/*
!data/.gitkeep
.vscode
__pycache__
__pycache__

4
Dockerfile
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@ -5,7 +5,7 @@ ENV POETRY_HOME=/opt/poetry
ENV POETRY_VENV=/opt/poetry-venv
ENV POETRY_CACHE_DIR=/opt/.cache
RUN apk add --no-cache tini
RUN apk add --no-cache tini libmagic
FROM python-base as poetry-base
@ -26,4 +26,4 @@ RUN poetry install --no-interaction --no-cache --without dev
COPY . /app
ENTRYPOINT ["/sbin/tini", "--"]
CMD ["sh", "./entry.sh"]
CMD ["sh", "./entry.sh"]

201
LICENSE Normal file
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@ -0,0 +1,201 @@
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11
README.md
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@ -1,3 +1,12 @@
# pyles
(pun on *py*thon and fi*les*)
(pun on *py*thon and fi*les*) (it's not a very good pun)
# Requirements
- `libmagic` (`libmagic` on Alpine, `libmagic1` on Debian) for file type identification
# License
Licensed under the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0),
found in the LICENSE file in this repository.

0
data/.gitkeep Normal file
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4
entry.sh
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@ -1,4 +1,4 @@
#!/bin/sh
source .env
echo "poetry run gunicorn --workers=${WORKERS:-2} 'pyles:app'"
poetry run gunicorn --workers=${WORKERS:-2} 'pyles:app'
echo "poetry run gunicorn --workers=${WORKERS:-2} --bind=0.0.0.0:8000 'pyles:app'"
poetry run gunicorn --workers=${WORKERS:-2} --bind=0.0.0.0:8000 'pyles:app'

177
poetry.lock generated
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@ -1,5 +1,64 @@
# This file is automatically @generated by Poetry and should not be changed by hand.
[[package]]
name = "argon2-cffi"
version = "23.1.0"
description = "Argon2 for Python"
category = "main"
optional = false
python-versions = ">=3.7"
files = [
{file = "argon2_cffi-23.1.0-py3-none-any.whl", hash = "sha256:c670642b78ba29641818ab2e68bd4e6a78ba53b7eff7b4c3815ae16abf91c7ea"},
{file = "argon2_cffi-23.1.0.tar.gz", hash = "sha256:879c3e79a2729ce768ebb7d36d4609e3a78a4ca2ec3a9f12286ca057e3d0db08"},
]
[package.dependencies]
argon2-cffi-bindings = "*"
[package.extras]
dev = ["argon2-cffi[tests,typing]", "tox (>4)"]
docs = ["furo", "myst-parser", "sphinx", "sphinx-copybutton", "sphinx-notfound-page"]
tests = ["hypothesis", "pytest"]
typing = ["mypy"]
[[package]]
name = "argon2-cffi-bindings"
version = "21.2.0"
description = "Low-level CFFI bindings for Argon2"
category = "main"
optional = false
python-versions = ">=3.6"
files = [
{file = "argon2-cffi-bindings-21.2.0.tar.gz", hash = "sha256:bb89ceffa6c791807d1305ceb77dbfacc5aa499891d2c55661c6459651fc39e3"},
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{file = "argon2_cffi_bindings-21.2.0-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:5e00316dabdaea0b2dd82d141cc66889ced0cdcbfa599e8b471cf22c620c329a"},
]
[package.dependencies]
cffi = ">=1.0.1"
[package.extras]
dev = ["cogapp", "pre-commit", "pytest", "wheel"]
tests = ["pytest"]
[[package]]
name = "black"
version = "23.9.1"
@ -57,6 +116,71 @@ files = [
{file = "blinker-1.6.2.tar.gz", hash = "sha256:4afd3de66ef3a9f8067559fb7a1cbe555c17dcbe15971b05d1b625c3e7abe213"},
]
[[package]]
name = "cffi"
version = "1.16.0"
description = "Foreign Function Interface for Python calling C code."
category = "main"
optional = false
python-versions = ">=3.8"
files = [
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{file = "cffi-1.16.0.tar.gz", hash = "sha256:bcb3ef43e58665bbda2fb198698fcae6776483e0c4a631aa5647806c25e02cc0"},
]
[package.dependencies]
pycparser = "*"
[[package]]
name = "click"
version = "8.1.7"
@ -307,6 +431,33 @@ files = [
{file = "pathspec-0.11.2.tar.gz", hash = "sha256:e0d8d0ac2f12da61956eb2306b69f9469b42f4deb0f3cb6ed47b9cce9996ced3"},
]
[[package]]
name = "peewee"
version = "3.16.3"
description = "a little orm"
category = "main"
optional = false
python-versions = "*"
files = [
{file = "peewee-3.16.3.tar.gz", hash = "sha256:12b30e931193bc37b11f7c2ac646e3f67125a8b1a543ad6ab37ad124c8df7d16"},
]
[[package]]
name = "peewee-migrate"
version = "1.12.2"
description = "Support for migrations in Peewee ORM"
category = "main"
optional = false
python-versions = ">=3.8,<4.0"
files = [
{file = "peewee_migrate-1.12.2-py3-none-any.whl", hash = "sha256:2930bf83ef802cdb5fb123116c5eb87cbf3756cb27674f674923be6bb27dabee"},
{file = "peewee_migrate-1.12.2.tar.gz", hash = "sha256:c8187c97b756909ea57e77cce06ae66395219e86764ef0b286a7bc72ff7405ad"},
]
[package.dependencies]
click = "*"
peewee = ">=3,<4"
[[package]]
name = "platformdirs"
version = "3.10.0"
@ -323,6 +474,18 @@ files = [
docs = ["furo (>=2023.7.26)", "proselint (>=0.13)", "sphinx (>=7.1.1)", "sphinx-autodoc-typehints (>=1.24)"]
test = ["appdirs (==1.4.4)", "covdefaults (>=2.3)", "pytest (>=7.4)", "pytest-cov (>=4.1)", "pytest-mock (>=3.11.1)"]
[[package]]
name = "pycparser"
version = "2.21"
description = "C parser in Python"
category = "main"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
files = [
{file = "pycparser-2.21-py2.py3-none-any.whl", hash = "sha256:8ee45429555515e1f6b185e78100aea234072576aa43ab53aefcae078162fca9"},
{file = "pycparser-2.21.tar.gz", hash = "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"},
]
[[package]]
name = "python-dotenv"
version = "1.0.0"
@ -338,6 +501,18 @@ files = [
[package.extras]
cli = ["click (>=5.0)"]
[[package]]
name = "python-magic"
version = "0.4.27"
description = "File type identification using libmagic"
category = "main"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
files = [
{file = "python-magic-0.4.27.tar.gz", hash = "sha256:c1ba14b08e4a5f5c31a302b7721239695b2f0f058d125bd5ce1ee36b9d9d3c3b"},
{file = "python_magic-0.4.27-py2.py3-none-any.whl", hash = "sha256:c212960ad306f700aa0d01e5d7a325d20548ff97eb9920dcd29513174f0294d3"},
]
[[package]]
name = "werkzeug"
version = "2.3.7"
@ -359,4 +534,4 @@ watchdog = ["watchdog (>=2.3)"]
[metadata]
lock-version = "2.0"
python-versions = "^3.11"
content-hash = "29a9314d17536581f56eec94d6d7b60f0f2a0cf5f401e2c3c149cf6067656a0e"
content-hash = "a8a740d71fe53f39a3e5d8ff069560abfb1e99db162b77892eb16cd0b34bda9d"

2
pyles/__init__.py
View file

@ -1 +1,3 @@
# SPDX-License-Identifier: Apache-2.0
from .app import app

28
pyles/app.py
View file

@ -1,8 +1,28 @@
from flask import Flask
# SPDX-License-Identifier: Apache-2.0
from flask import Flask, make_response
from pyles.settings import SECRET_KEY
from pyles.blueprints import files_api
from pyles.files import get_file_by_hash
from pyles.db import File
app = Flask(__name__)
app.secret_key = SECRET_KEY
app.register_blueprint(files_api)
@app.route("/")
def hello_world():
return {"data": "hello world!"}
@app.route("/<file_id>.<extension>")
def download_file(file_id: str, extension: str):
file = File.get_or_none(url_id=file_id)
if not file:
return ("", 404)
data = get_file_by_hash(file.hash, file.content_type)
resp = make_response(data)
resp.status = 200
resp.content_type = file.content_type
resp.content_length = len(data)
return resp

3
pyles/blueprints/__init__.py Normal file
View file

@ -0,0 +1,3 @@
# SPDX-License-Identifier: Apache-2.0
from .api.files import bp as files_api

35
pyles/blueprints/api/files.py Normal file
View file

@ -0,0 +1,35 @@
# SPDX-License-Identifier: Apache-2.0
from flask import Blueprint, g, request, jsonify
from werkzeug.utils import secure_filename
from pyles.db import File
from pyles.files import upload_file
from pyles.user import token_required
from pyles.settings import BASE_URL
bp = Blueprint("files_api", __name__)
@bp.post("/upload")
@token_required
def upload():
file = request.files.get("file")
if not file:
return jsonify({"error": "Missing file"}), 400
hash, content_type = upload_file(file)
db_file: File = File.create(
user=g.user,
filename=secure_filename(file.filename),
hash=hash,
content_type=content_type,
)
return jsonify(
{
"id": db_file.id,
"hash": db_file.hash,
"url": f"{BASE_URL}/{db_file.path}",
}
)

133
pyles/db.py
View file

@ -0,0 +1,133 @@
# SPDX-License-Identifier: Apache-2.0
import base64
import os
import uuid
import mimetypes
from datetime import datetime, timezone
import peewee
from peewee_migrate import Router
from playhouse.pool import PooledSqliteDatabase
from argon2 import PasswordHasher
from itsdangerous.url_safe import URLSafeSerializer
from pyles.settings import DATABASE, SECRET_KEY
db = PooledSqliteDatabase(
DATABASE,
max_connections=30,
stale_timeout=300,
)
db.connect()
migrations = Router(db)
ph = PasswordHasher()
class BaseModel(peewee.Model):
class Meta:
database = db
class User(BaseModel):
id = peewee.UUIDField(default=uuid.uuid4, primary_key=True)
username = peewee.CharField(max_length=40, unique=True)
is_admin = peewee.BooleanField(null=False, default=False)
password = peewee.CharField()
salt = peewee.CharField()
@classmethod
def new(cls, username: str, password: str, is_admin=False) -> "User":
return cls.create(
username=username,
password=ph.hash(password),
salt=os.urandom(16).hex(),
is_admin=is_admin,
)
def set_password(self, password: str):
"""Sets a password, but doesn't save it.
This also changes the user's token salt."""
self.password = ph.hash(password)
self.salt = os.urandom(16).hex()
return self
def verify_password(self, password: str):
"""Checks the user's password.
Returns True if the password is valid, False otherwise.
Does not raise an error."""
try:
return ph.verify(self.password, password)
except:
return False
def get_token(self):
if not self.salt:
self.salt = os.urandom(16).hex()
self.save()
s = URLSafeSerializer(SECRET_KEY, salt=self.salt)
return s.dumps(str(self.id))
def verify_token(self, token: str):
s = URLSafeSerializer(SECRET_KEY, salt=self.salt)
try:
value = s.loads(token)
return value == str(self.id)
except:
return False
def random_url_id():
return base64.b64encode(os.urandom(12), altchars=b"bB").decode("utf-8")
class File(BaseModel):
id = peewee.AutoField()
url_id = peewee.CharField(null=False, unique=True, default=random_url_id)
filename = peewee.CharField(null=False)
hash = peewee.CharField(null=False)
content_type = peewee.CharField(null=False)
created_at = peewee.DateTimeField(
null=False, default=lambda: datetime.now(tz=timezone.utc)
)
expires_at = peewee.DateTimeField(null=True)
user = peewee.ForeignKeyField(User)
@property
def path(self):
ext = mimetypes.guess_extension(self.content_type, strict=False)
if not ext:
ext = ""
return f"{self.url_id}{ext}"
class Tag(BaseModel):
id = peewee.AutoField()
name = peewee.CharField()
user = peewee.ForeignKeyField(User)
class FileTag(BaseModel):
file = peewee.ForeignKeyField(File)
tag = peewee.ForeignKeyField(Tag)
with db:
db.create_tables([User, File, Tag, FileTag])
migrations.migrator.create_model(User)
migrations.migrator.create_model(File)
migrations.migrator.create_model(Tag)
migrations.migrator.create_model(FileTag)
migrations.run()

66
pyles/files.py Normal file
View file

@ -0,0 +1,66 @@
# SPDX-License-Identifier: Apache-2.0
from pathlib import Path
import mimetypes
import hashlib
import os
import magic
from werkzeug.datastructures import FileStorage
from pyles.settings import STORAGE_BACKEND, STORAGE_LOCAL_DIR
if STORAGE_BACKEND == "local":
path = Path(".") / STORAGE_LOCAL_DIR
os.makedirs(path, exist_ok=True)
def _local_file_path(hash: str, content_type: str):
ext = mimetypes.guess_extension(content_type, strict=False)
if not ext:
raise ValueError("Extension couldn't be guessed")
return Path(".") / STORAGE_LOCAL_DIR / f"{hash}{ext}"
def get_file_by_hash(hash: str, content_type: str):
match STORAGE_BACKEND:
case "local":
return _local_get_file_by_hash(hash, content_type)
case "s3":
raise NotImplementedError()
def upload_file(file: FileStorage) -> tuple[str, str]:
"""Upload a file.
The first return argument is the hash, the second return argument is the file's MIME type.
"""
match STORAGE_BACKEND:
case "local":
return _local_upload_file(file)
case "s3":
raise NotImplementedError()
def _local_get_file_by_hash(hash: str, content_type: str):
p = _local_file_path(hash, content_type)
with p.open("rb") as f:
return f.read()
def _local_upload_file(file: FileStorage) -> tuple[str, str]:
"""Uploads `file` to local storage.
The first return argument is the hash, the second return argument is the file's MIME type.
"""
stream = file.stream.read()
file_type = magic.from_buffer(stream[:2048], mime=True)
hash = hashlib.sha256(stream).hexdigest()
p = _local_file_path(hash, file_type)
with p.open("wb") as f:
f.write(stream)
return (hash, file_type)

14
pyles/settings.py
View file

@ -1,6 +1,20 @@
# SPDX-License-Identifier: Apache-2.0
from environs import Env
from typing import Literal
env = Env()
env.read_env()
DATABASE: str = env("DATABASE")
SECRET_KEY: str = env("SECRET_KEY")
BASE_URL: str = env("BASE_URL")
MAX_FILE_SIZE: int = env.int("MAX_FILE_SIZE", 15)
MAX_CONTENT_LENGTH: int = env.int("MAX_CONTENT_LENGTH", 16)
STORAGE_BACKEND: Literal["local", "s3"] = env(
"STORAGE_BACKEND", "local", validate=lambda s: s == "local" or s == "s3"
)
STORAGE_LOCAL_DIR: str = env("STORAGE_LOCAL_DIR", "data/uploads")

29
pyles/user.py Normal file
View file

@ -0,0 +1,29 @@
# SPDX-License-Identifier: Apache-2.0
from functools import wraps
from itsdangerous.url_safe import URLSafeSerializer
from flask import g, request, redirect, url_for, jsonify
from pyles.settings import SECRET_KEY
from pyles.db import User
def token_required(f):
@wraps(f)
def inner(*args, **kwargs):
token = request.headers.get("Authorization")
if not token:
return jsonify({"error": "Missing token"}), 403
_, id = URLSafeSerializer(SECRET_KEY).loads_unsafe(token)
u: User = User.get_or_none(id=id)
if u is None:
return jsonify({"error": "Invalid token"}), 403
if not u.verify_token(token):
return jsonify({"error": "Invalid token"}), 403
g.user = u
return f(*args, **kwargs)
return inner

4
pyproject.toml
View file

@ -12,6 +12,10 @@ flask = "^2.3.3"
itsdangerous = "^2.1.2"
environs = "^9.5.0"
gunicorn = "^21.2.0"
peewee = "^3.16.3"
argon2-cffi = "^23.1.0"
peewee-migrate = "^1.12.2"
python-magic = "^0.4.27"
[tool.poetry.group.dev.dependencies]