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import os
import base64
import io
import binascii
import zipfile
from uuid import uuid4
from flask import after_this_request, send_from_directory
from flask_restful import Resource, reqparse, abort, request, url_for
from cerberus import Validator
from werkzeug.datastructures import FileStorage
from matweb import file_removal_scheduler, utils
class APIUpload(Resource):
def __init__(self, **kwargs):
self.upload_folder = kwargs['upload_folder']
def post(self):
utils.check_upload_folder(self.upload_folder)
req_parser = reqparse.RequestParser()
req_parser.add_argument('file_name', type=str, required=True, help='Post parameter is not specified: file_name')
req_parser.add_argument('file', type=str, required=True, help='Post parameter is not specified: file')
args = req_parser.parse_args()
try:
file_data = base64.b64decode(args['file'])
except (binascii.Error, ValueError):
abort(400, message='Failed decoding file')
file = FileStorage(stream=io.BytesIO(file_data), filename=args['file_name'])
try:
filename, filepath = utils.save_file(file, self.upload_folder)
except ValueError:
abort(400, message='Invalid Filename')
parser, mime = utils.get_file_parser(filepath)
if parser is None:
abort(415, message='The type %s is not supported' % mime)
meta = parser.get_meta()
if not parser.remove_all():
abort(500, message='Unable to clean %s' % mime)
key, secret, meta_after, output_filename = utils.cleanup(parser, filepath, self.upload_folder)
return utils.return_file_created_response(
utils.get_file_removal_max_age_sec(),
output_filename,
mime,
key,
secret,
meta,
meta_after,
url_for(
'apidownload',
key=key,
secret=secret,
filename=output_filename,
_external=True
)
)
class APIDownload(Resource):
def __init__(self, **kwargs):
self.upload_folder = kwargs['upload_folder']
def get(self, key: str, secret: str, filename: str):
complete_path, filepath = utils.is_valid_api_download_file(filename, key, secret, self.upload_folder)
# Make sure the file is NOT deleted on HEAD requests
if request.method == 'GET':
file_removal_scheduler.run_file_removal_job(self.upload_folder)
@after_this_request
def remove_file(response):
if os.path.exists(complete_path):
os.remove(complete_path)
return response
return send_from_directory(self.upload_folder, filepath, as_attachment=True)
class APIBulkDownloadCreator(Resource):
def __init__(self, **kwargs):
self.upload_folder = kwargs['upload_folder']
schema = {
'download_list': {
'type': 'list',
'minlength': 2,
'maxlength': int(os.environ.get('MAT2_MAX_FILES_BULK_DOWNLOAD', 10)),
'schema': {
'type': 'dict',
'schema': {
'key': {'type': 'string', 'required': True},
'secret': {'type': 'string', 'required': True},
'file_name': {'type': 'string', 'required': True}
}
}
}
}
v = Validator(schema)
def post(self):
utils.check_upload_folder(self.upload_folder)
data = request.json
if not self.v.validate(data):
abort(400, message=self.v.errors)
# prevent the zip file from being overwritten
zip_filename = 'files.' + str(uuid4()) + '.zip'
zip_path = os.path.join(self.upload_folder, zip_filename)
cleaned_files_zip = zipfile.ZipFile(zip_path, 'w')
with cleaned_files_zip:
for file_candidate in data['download_list']:
complete_path, file_path = utils.is_valid_api_download_file(
file_candidate['file_name'],
file_candidate['key'],
file_candidate['secret'],
self.upload_folder
)
try:
cleaned_files_zip.write(complete_path)
os.remove(complete_path)
except ValueError:
abort(400, message='Creating the archive failed')
try:
cleaned_files_zip.testzip()
except ValueError as e:
abort(400, message=str(e))
parser, mime = utils.get_file_parser(zip_path)
if not parser.remove_all():
abort(500, message='Unable to clean %s' % mime)
key, secret, meta_after, output_filename = utils.cleanup(parser, zip_path, self.upload_folder)
return {
'inactive_after_sec': utils.get_file_removal_max_age_sec(),
'output_filename': output_filename,
'mime': mime,
'key': key,
'secret': secret,
'meta_after': meta_after,
'download_link': url_for(
'apidownload',
key=key,
secret=secret,
filename=output_filename,
_external=True
)
}, 201
class APISupportedExtensions(Resource):
def get(self):
return utils.get_supported_extensions()
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