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
|
module BlobViewer
class Base
PARTIAL_PATH_PREFIX = 'projects/blob/viewers'.freeze
class_attribute :partial_name, :loading_partial_name, :type, :extensions, :file_types, :client_side, :binary, :switcher_icon, :switcher_title, :max_size, :absolute_max_size
self.loading_partial_name = 'loading'
delegate :partial_path, :loading_partial_path, :rich?, :simple?, :client_side?, :server_side?, :text?, :binary?, to: :class
attr_reader :blob
attr_accessor :override_max_size
def initialize(blob)
@blob = blob
end
def self.partial_path
File.join(PARTIAL_PATH_PREFIX, partial_name)
end
def self.loading_partial_path
File.join(PARTIAL_PATH_PREFIX, loading_partial_name)
end
def self.rich?
type == :rich
end
def self.simple?
type == :simple
end
def self.auxiliary?
type == :auxiliary
end
def self.client_side?
client_side
end
def self.server_side?
!client_side?
end
def self.binary?
binary
end
def self.text?
!binary?
end
def self.can_render?(blob, verify_binary: true)
return false if verify_binary && binary? != blob.binary?
return true if extensions&.include?(blob.extension)
return true if file_types&.include?(Gitlab::FileDetector.type_of(blob.path))
false
end
def too_large?
max_size && blob.raw_size > max_size
end
def absolutely_too_large?
absolute_max_size && blob.raw_size > absolute_max_size
end
def can_override_max_size?
too_large? && !absolutely_too_large?
end
# This method is used on the server side to check whether we can attempt to
# render the blob at all. Human-readable error messages are found in the
# `BlobHelper#blob_render_error_reason` helper.
#
# This method does not and should not load the entire blob contents into
# memory, and should not be overridden to do so in order to validate the
# format of the blob.
#
# Prefer to implement a client-side viewer, where the JS component loads the
# binary from `blob_raw_url` and does its own format validation and error
# rendering, especially for potentially large binary formats.
def render_error
return @render_error if defined?(@render_error)
@render_error =
if server_side_but_stored_externally?
# Files that are not stored in the repository, like LFS files and
# build artifacts, can only be rendered using a client-side viewer,
# since we do not want to read large amounts of data into memory on the
# server side. Client-side viewers use JS and can fetch the file from
# `blob_raw_url` using AJAX.
:server_side_but_stored_externally
elsif override_max_size ? absolutely_too_large? : too_large?
:too_large
end
end
def prepare!
# To be overridden by subclasses
end
private
def server_side_but_stored_externally?
server_side? && blob.stored_externally?
end
end
end
|
