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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
# frozen_string_literal: true
# This service downloads and links lfs objects from a remote URL
module Projects
module LfsPointers
class LfsDownloadService < BaseService
SizeError = Class.new(StandardError)
OidError = Class.new(StandardError)
attr_reader :lfs_download_object
delegate :oid, :size, :credentials, :sanitized_url, to: :lfs_download_object, prefix: :lfs
def initialize(project, lfs_download_object)
super(project)
@lfs_download_object = lfs_download_object
end
def execute
return unless project&.lfs_enabled? && lfs_download_object
return error("LFS file with oid #{lfs_oid} has invalid attributes") unless lfs_download_object.valid?
wrap_download_errors do
download_lfs_file!
end
end
private
def wrap_download_errors(&block)
yield
rescue SizeError, OidError, StandardError => e
error("LFS file with oid #{lfs_oid} could't be downloaded from #{lfs_sanitized_url}: #{e.message}")
end
def download_lfs_file!
with_tmp_file do |tmp_file|
download_and_save_file!(tmp_file)
project.lfs_objects << find_or_create_lfs_object(tmp_file)
success
end
end
def find_or_create_lfs_object(tmp_file)
lfs_obj = LfsObject.safe_find_or_create_by!(
oid: lfs_oid,
size: lfs_size
)
lfs_obj.update!(file: tmp_file) unless lfs_obj.file.file
lfs_obj
end
def download_and_save_file!(file)
digester = Digest::SHA256.new
response = Gitlab::HTTP.get(lfs_sanitized_url, download_headers) do |fragment|
digester << fragment
file.write(fragment)
raise_size_error! if file.size > lfs_size
end
raise StandardError, "Received error code #{response.code}" unless response.success?
raise_size_error! if file.size != lfs_size
raise_oid_error! if digester.hexdigest != lfs_oid
end
def download_headers
{ stream_body: true }.tap do |headers|
if lfs_credentials[:user].present? || lfs_credentials[:password].present?
# Using authentication headers in the request
headers[:basic_auth] = { username: lfs_credentials[:user], password: lfs_credentials[:password] }
end
end
end
def with_tmp_file
create_tmp_storage_dir
File.open(tmp_filename, 'wb') do |file|
yield file
rescue StandardError => e
# If the lfs file is successfully downloaded it will be removed
# when it is added to the project's lfs files.
# Nevertheless if any excetion raises the file would remain
# in the file system. Here we ensure to remove it
File.unlink(file) if File.exist?(file)
raise e
end
end
def tmp_filename
File.join(tmp_storage_dir, lfs_oid)
end
def create_tmp_storage_dir
FileUtils.makedirs(tmp_storage_dir) unless Dir.exist?(tmp_storage_dir)
end
def tmp_storage_dir
@tmp_storage_dir ||= File.join(storage_dir, 'tmp', 'download')
end
def storage_dir
@storage_dir ||= Gitlab.config.lfs.storage_path
end
def raise_size_error!
raise SizeError, 'Size mistmatch'
end
def raise_oid_error!
raise OidError, 'Oid mismatch'
end
def error(message, http_status = nil)
log_error(message)
super
end
end
end
end
|