mediacms/uploader/fineuploader.py

120 lines
3.5 KiB
Python
Raw Normal View History

2024-10-02 11:54:47 +02:00
import os
import re
2020-12-15 22:33:43 +01:00
import shutil
import uuid
2021-05-26 17:35:21 +02:00
from io import StringIO
from os.path import join
2020-12-15 22:33:43 +01:00
from django.conf import settings
from . import utils
def is_valid_uuid_format(uuid_string):
pattern = re.compile(r'^[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[89ab][a-f0-9]{3}-[a-f0-9]{12}$', re.IGNORECASE)
return bool(pattern.match(uuid_string))
2020-12-15 22:33:43 +01:00
class BaseFineUploader(object):
def __init__(self, data, *args, **kwargs):
self.data = data
self.filename = data.get("qqfilename")
self.uuid = data.get("qquuid")
if not is_valid_uuid_format(self.uuid):
# something nasty client side could be happening here
# generate new uuid to ensure this is uuid
# not sure if this will work with the chunked uploads though
self.uuid = uuid.uuid4()
self.filename = os.path.basename(self.filename)
# avoid possibility of passing a fake path here
2020-12-15 22:33:43 +01:00
self.file = data.get("qqfile")
self.storage_class = settings.FILE_STORAGE
self.real_path = None
@property
def finished(self):
return self.real_path is not None
@property
def file_path(self):
return join(settings.UPLOAD_DIR, self.uuid)
@property
def _full_file_path(self):
return join(self.file_path, self.filename)
@property
def storage(self):
file_storage = utils.import_class(self.storage_class)
return file_storage()
@property
def url(self):
if not self.finished:
return None
return self.storage.url(self.real_path)
class ChunkedFineUploader(BaseFineUploader):
concurrent = True
def __init__(self, data, concurrent=True, *args, **kwargs):
super(ChunkedFineUploader, self).__init__(data, *args, **kwargs)
self.concurrent = concurrent
self.total_parts = data.get("qqtotalparts")
if not isinstance(self.total_parts, int):
self.total_parts = 1
qqpartindex = data.get("qqpartindex")
if not isinstance(qqpartindex, int):
# something nasty client side could be happening here
qqpartindex = 0
self.part_index = qqpartindex
2020-12-15 22:33:43 +01:00
@property
def chunks_path(self):
return join(settings.CHUNKS_DIR, self.uuid)
@property
def _abs_chunks_path(self):
return join(settings.MEDIA_ROOT, self.chunks_path)
@property
def chunk_file(self):
return join(self.chunks_path, str(self.part_index))
@property
def chunked(self):
return self.total_parts > 1
@property
def is_time_to_combine_chunks(self):
return self.total_parts - 1 == self.part_index
def combine_chunks(self):
# implement the same behaviour.
self.real_path = self.storage.save(self._full_file_path, StringIO())
2020-12-15 22:33:43 +01:00
with self.storage.open(self.real_path, "wb") as final_file:
for i in range(self.total_parts):
part = join(self.chunks_path, str(i))
with self.storage.open(part, "rb") as source:
final_file.write(source.read())
shutil.rmtree(self._abs_chunks_path)
def _save_chunk(self):
return self.storage.save(self.chunk_file, self.file)
def save(self):
if self.chunked:
chunk = self._save_chunk()
if not self.concurrent and self.is_time_to_combine_chunks:
self.combine_chunks()
return self.real_path
return chunk
else:
self.real_path = self.storage.save(self._full_file_path, self.file)
return self.real_path