1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
######################################################################
#
# File: b2sdk/_internal/transfer/outbound/copy_source.py
#
# Copyright 2020 Backblaze Inc. All Rights Reserved.
#
# License https://www.backblaze.com/using_b2_code.html
#
######################################################################
from __future__ import annotations
from b2sdk._internal.encryption.setting import EncryptionSetting
from b2sdk._internal.http_constants import LARGE_FILE_SHA1
from b2sdk._internal.transfer.outbound.outbound_source import OutboundTransferSource
class CopySource(OutboundTransferSource):
def __init__(
self,
file_id,
offset=0,
length=None,
encryption: EncryptionSetting | None = None,
source_file_info=None,
source_content_type=None,
):
if not length and offset > 0:
raise ValueError('Cannot copy with non zero offset and unknown or zero length')
self.file_id = file_id
self.length = length
self.offset = offset
self.encryption = encryption
self.source_file_info = source_file_info
self.source_content_type = source_content_type
def __repr__(self):
return (
f'<{self.__class__.__name__} file_id={self.file_id} offset={self.offset} length={self.length} id={id(self)}, encryption={self.encryption},'
f'source_content_type={self.source_content_type}>, source_file_info={self.source_file_info}'
)
def get_content_length(self):
return self.length
def is_upload(self):
return False
def is_copy(self):
return True
def get_bytes_range(self):
if not self.length:
if self.offset > 0:
# auto mode should get file info and create correct copy source (with length)
raise ValueError(
'cannot return bytes range for non zero offset and unknown or zero length'
)
return None
return self.offset, self.offset + self.length - 1
def get_copy_source_range(self, relative_offset, range_length):
if self.length is not None and range_length + relative_offset > self.length:
raise ValueError('Range length overflow source length')
range_offset = self.offset + relative_offset
return self.__class__(
self.file_id,
range_offset,
range_length,
encryption=self.encryption,
source_file_info=self.source_file_info,
source_content_type=self.source_content_type,
)
def get_content_sha1(self):
if self.offset or self.length:
# this is a copy of only a range of the source, can't copy the SHA1
return None
return self.source_file_info.get(LARGE_FILE_SHA1)
|
