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#!/usr/bin/env python
import base64
import datetime
import importlib
import os
import random
import subprocess
import tempfile
from urllib.parse import urlencode, urljoin
from flask import Blueprint, redirect, current_app, url_for, request, render_template, session, \
flash, send_file, abort, jsonify, Response
from flask_login import login_user, logout_user, current_user, login_required
import jwt
from PIL import Image
import requests
from .db import db, User, UserSession, File, NoResultFound, IntegrityError
from .monkey import patch as monkey_patch
from .login import login_manager, load_user
from .file_storage.exceptions import StorageError
storage = importlib.import_module(current_app.config.get('STORAGE_MODULE', '.file_storage.filesystem'), package='fbin') \
.Storage(current_app)
monkey_patch()
base62_alphabet = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
def get_or_create_user(username, jab_id):
try:
return db.session.query(User).filter(User.jab_id == jab_id).one()
except NoResultFound:
try:
user = User(username, jab_id)
db.session.add(user)
db.session.commit()
db.session.refresh(user)
return user
except IntegrityError:
return None
def get_file(file_hash, user_id=None, update_accessed=False):
try:
f = db.session.query(File).filter(File.hash == file_hash)
if user_id:
f = f.filter(File.user_id == user_id)
f = f.one()
except NoResultFound:
return None
if update_accessed:
f.accessed = datetime.datetime.utcnow()
db.session.add(f)
db.session.commit()
# Refresh after field update.
db.session.refresh(f)
return f
def get_files(user):
try:
db.session.add(user)
files = user.files
except NoResultFound:
return []
return files
def delete_file(file):
db.session.delete(file)
db.session.commit()
storage.delete_file(file)
app = Blueprint('fbin', __name__)
@app.route('/')
def index():
return redirect(url_for('.upload'))
@app.route('/u')
@app.route('/upload', methods=['GET', 'POST'])
def upload(api=False, user=None):
def error(message):
if api:
return jsonify({
'status': False,
'message': message,
})
elif old_api:
return 'ERROR {}'.format(message)
else:
flash(message, 'warning')
return render_template('upload.html', **context)
context = {
'title': 'Upload',
}
old_api = bool(request.form.get('api'))
if request.method == 'GET':
if api or old_api:
# API calls shouldn't use GET.
abort(405)
return render_template('upload.html', **context)
if not user and current_user.is_authenticated:
user = current_user.user
if not user and not current_app.config.get('ALLOW_ANONYMOUS_UPLOADS'):
abort(403)
uploaded_file = request.files.get('file')
if not uploaded_file or not uploaded_file.filename:
return error('No valid file or filename was provided.')
file_hash = ''.join(random.choice(base62_alphabet) for x in range(5))
try:
new_file = storage.store_file(uploaded_file, file_hash, user, request.remote_addr)
except StorageError as e:
return error(str(e))
if api:
return jsonify({
'status': True,
'hash': new_file.hash,
'urls': {
'base': url_for('fbin.file', hash='', _external=True),
'full': url_for('fbin.file', hash=new_file.hash, filename=new_file.filename, _external=True),
'ext': url_for('fbin.file', hash=new_file.hash, ext=new_file.ext, _external=True),
'hash': url_for('fbin.file', hash=new_file.hash, _external=True),
},
})
elif old_api:
return 'OK {hash}'.format(hash=new_file.hash)
else:
context = {
'file': new_file,
}
return redirect(url_for('.uploaded', hash=new_file.hash))
@app.route('/uploaded/<hash>')
def uploaded(hash):
f = get_file(hash, update_accessed=False)
if not f:
abort(404)
if f.user_id and (not current_user.is_authenticated or f.user_id != current_user.get_user_id()):
abort(404)
context = {
'title': 'Uploaded',
'subtitle': f.filename,
'file': f,
}
return render_template('uploaded.html', **context)
def _get_mimetype(f, path):
if isinstance(path, Response):
mimetype = path.content_type
else:
mimetype = f.get_mime_type()
# Serve blacklisted mimetypes as either text/plain or application/octet-stream
if mimetype in current_app.config['MIMETYPE_BLACKLIST'] and (f.user is None
or f.user.username not in current_app.config['MIMETYPE_USER_WHITELIST']):
if mimetype.startswith('text/'):
mimetype = 'text/plain'
else:
mimetype = 'application/octet-stream'
return mimetype
@app.route('/f/<hash:hash>')
@app.route('/f/<hash:hash><ext:ext>')
@app.route('/f/<hash:hash>/<path:filename>')
@app.route('/file/<hash:hash>', endpoint='file')
@app.route('/file/<hash:hash><ext:ext>', endpoint='file')
@app.route('/file/<hash:hash>/<path:filename>', endpoint='file')
def _file(hash, ext=None, filename=None):
f = get_file(hash)
if not f or (f.blocked_reason and (f.blocked_reason['positives'] >= current_app.config['VIRUSTOTAL_MINIMUM_POSITIVES']
or any(scan['detected'] and scan['result'] in current_app.config['VIRUSTOTAL_SINGULAR_MATCHES']
for scan in f.blocked_reason['scans'].values()))):
abort(404)
path = storage.get_file(f)
mimetype = _get_mimetype(f, path)
if isinstance(path, Response):
path.content_type = mimetype
return path
if not path or not os.path.exists(path):
abort(404)
return send_file(path, mimetype=mimetype, attachment_filename=f.filename)
@app.route('/l')
@app.route('/login')
def login():
session['oauth_state'] = base64.urlsafe_b64encode(os.urandom(30)).decode()
return redirect(urljoin(current_app.config['OAUTH_URL'], 'authorize') + '?' + urlencode({
'response_type': 'code',
'client_id': current_app.config['OAUTH_CLIENT_ID'],
'redirect_uri': urljoin(request.host_url, url_for('.auth')),
'state': session['oauth_state'],
}))
@app.route('/account')
def account():
return redirect(current_app.config['ACCOUNT_URL'])
@app.route('/o')
@app.route('/logout')
def logout():
if not current_user.is_authenticated:
return redirect(url_for('.index'))
session_id = int(current_user.get_id().split(':', 1)[-1])
db.session.query(UserSession).filter_by(id=session_id).delete()
logout_user()
return redirect(url_for('.index'))
@app.route('/auth')
def auth():
if 'error' in request.args:
error = request.args['error']
error_description = request.args.get('error_description')
msg = 'OAuth error: {}'.format(error)
if error_description:
msg += ' ({})'.format(error_description)
flash(msg, 'error')
return redirect(url_for('.index'))
session_state = session.pop('oauth_state', None)
state = request.args.get('state')
if session_state != state:
flash('Invalid OAuth state', 'error')
return redirect(url_for('.index'))
code = request.args.get('code')
if not code:
flash('Missing OAuth code', 'error')
return redirect(url_for('.index'))
rs = requests.Session()
response = rs.post(urljoin(current_app.config['OAUTH_URL'], 'token'), data={
'grant_type': 'authorization_code',
'code': code,
'client_id': current_app.config['OAUTH_CLIENT_ID'],
'client_secret': current_app.config['OAUTH_CLIENT_SECRET'],
'redirect_uri': urljoin(request.host_url, url_for('.auth')),
})
token = response.json()
if 'error' in token:
msg = 'OAuth error: {}'.format(token['error'])
flash(msg, 'error')
return redirect(url_for('.index'))
try:
jwt.decode(token['access_token'], key=current_app.config['JWT_PUBLIC_KEY'],
audience=current_app.config['OAUTH_CLIENT_ID'],
algorithms=[current_app.config['OAUTH_JWT_ALGORITHM']])
jwt.decode(token['refresh_token'], key=current_app.config['JWT_PUBLIC_KEY'],
audience=current_app.config['OAUTH_CLIENT_ID'],
algorithms=[current_app.config['OAUTH_JWT_ALGORITHM']])
except jwt.InvalidTokenError as e:
flash('Failed to verify token: {!s}'.format(e), 'error')
return redirect(url_for('.index'))
response = rs.get(urljoin(current_app.config['OAUTH_URL'], '/api/user'),
headers={'Authorization': 'Bearer {}'.format(token['access_token'])})
user = response.json()
user = get_or_create_user(user['username'], user['id'])
us = UserSession(user.id, token['access_token'], token['refresh_token'])
us.updated = datetime.datetime.utcnow()
db.session.add(us)
db.session.commit()
db.session.refresh(us)
user = load_user('{}:{}'.format(user.id, us.id))
if not user:
flash('Failed to retrieve user instance.', 'error')
else:
login_user(user, remember=True)
return redirect(url_for('.index'))
@app.route('/m')
@app.route('/files')
@login_required
def files():
files = get_files(current_user.user)
context = {
'title': 'Files',
'files': files,
'total_size': File.pretty_size(sum(size for size in (f.size for f in files) if size is not None)),
}
return render_template('files.html', **context)
@app.route('/files', methods=['POST'])
@login_required
def file_edit():
user_id = int(current_user.get_id().split(':')[0])
f = get_file(request.form.get('hash'), user_id=user_id, update_accessed=False)
if not f:
flash('File not found.', 'error')
return redirect(url_for('.files'))
if 'filename' in request.form:
filename = request.form.get('filename', f.filename)
f.filename = filename
db.session.add(f)
flash('Filename changed to "{}".'.format(f.filename), 'success')
elif 'delete' in request.form:
try:
delete_file(f)
except Exception:
flash('Failed to delete file.', 'error')
else:
flash('File deleted.', 'success')
else:
flash('No action was performed.', 'warning')
return redirect(url_for('.files'))
@app.route('/i')
@app.route('/images')
@login_required
def images():
files = [f for f in get_files(current_user.user) if f.is_image()]
context = {
'title': 'Images',
'fullwidth': True,
'files': files,
'total_size': File.pretty_size(sum(size for size in (f.size for f in files) if size is not None)),
}
return render_template('images.html', **context)
@app.route('/v')
@app.route('/videos')
@login_required
def videos():
files = [f for f in get_files(current_user.user) if f.is_video()]
context = {
'title': 'Videos',
'fullwidth': True,
'files': files,
'total_size': File.pretty_size(sum(size for size in (f.size for f in files) if size is not None)),
}
return render_template('images.html', **context)
@app.route('/t/<hash:hash>')
@app.route('/thumb/<hash:hash>')
def thumb(hash):
f = get_file(hash, update_accessed=False)
response = storage.get_thumbnail(f)
if not response:
with tempfile.NamedTemporaryFile(suffix='.jpg') as ttf: # temporary thumb file
if f.is_image():
try:
with storage.temp_file(f) as tf:
im = Image.open(tf)
# Check for valid JPEG modes.
if im.mode not in ('1', 'L', 'RGB', 'RGBX', 'CMYK', 'YCbCr'):
im = im.convert('RGB')
e = im.getexif()
# Get orientation EXIF tag
orientation = e.get(274)
if orientation == 3:
im = im.rotate(180, expand=True)
elif orientation == 6:
im = im.rotate(270, expand=True)
elif orientation == 8:
im = im.rotate(90, expand=True)
im.thumbnail(current_app.config.get('THUMB_SIZE', (128, 128)), Image.ANTIALIAS)
im.save(ttf)
except IOError:
# We can't generate a thumbnail for this file, just say it doesn't exist.
abort(404)
elif f.is_video():
with storage.temp_file(f) as tf:
p = subprocess.run(['ffmpegthumbnailer', '-i', '-', '-o', ttf.name], stdin=tf)
if p.returncode != 0:
abort(404)
else:
abort(404)
ttf.seek(0)
if not os.path.getsize(ttf.name):
abort(404)
storage.store_thumbnail(f, ttf)
response = storage.get_thumbnail(f)
if isinstance(response, Response):
return response
return send_file(response, attachment_filename='thumb.jpg')
@app.route('/h')
@app.route('/help')
def help():
return redirect(url_for('.api'))
@app.route('/api')
def api():
context = {
'title': 'API',
'subtitle': 'keys and usage',
}
return render_template('api.html', **context)
@app.route('/generate-api-key')
def generate_api_key():
if not current_user.is_authenticated:
abort(403)
now = datetime.datetime.utcnow()
user_id = int(current_user.get_id().split(':')[0])
data = {
'iss': request.url_root,
'iat': now,
'nbf': now,
'sub': user_id,
}
token = jwt.encode(data, current_app.config['SECRET_KEY'], algorithm=current_app.config['API_JWT_ALGORITHM'])
return token
@app.route('/invalidate-api-keys')
@login_required
def invalidate_api_keys():
user = current_user.user
db.session.add(user)
user.api_key_date = datetime.datetime.utcnow()
db.session.commit()
flash('All API keys invalidated.', 'success')
return redirect(request.referrer)
login_manager.login_view = '.login'
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