2017-04-13 17:14:08 +00:00
|
|
|
module BlobViewer
|
|
|
|
class Base
|
2017-04-24 17:51:56 +00:00
|
|
|
class_attribute :partial_name, :type, :extensions, :client_side, :binary, :switcher_icon, :switcher_title, :max_size, :absolute_max_size
|
2017-04-13 17:14:08 +00:00
|
|
|
|
2017-04-24 14:27:19 +00:00
|
|
|
delegate :partial_path, :rich?, :simple?, :client_side?, :server_side?, :text?, :binary?, to: :class
|
2017-04-13 17:14:08 +00:00
|
|
|
|
|
|
|
attr_reader :blob
|
2017-04-21 18:59:34 +00:00
|
|
|
attr_accessor :override_max_size
|
2017-04-13 17:14:08 +00:00
|
|
|
|
|
|
|
def initialize(blob)
|
|
|
|
@blob = blob
|
|
|
|
end
|
|
|
|
|
|
|
|
def self.partial_path
|
|
|
|
"projects/blob/viewers/#{partial_name}"
|
|
|
|
end
|
|
|
|
|
|
|
|
def self.rich?
|
|
|
|
type == :rich
|
|
|
|
end
|
|
|
|
|
|
|
|
def self.simple?
|
|
|
|
type == :simple
|
|
|
|
end
|
|
|
|
|
|
|
|
def self.client_side?
|
|
|
|
client_side
|
|
|
|
end
|
|
|
|
|
2017-04-21 18:22:04 +00:00
|
|
|
def self.server_side?
|
2017-04-13 17:14:08 +00:00
|
|
|
!client_side?
|
|
|
|
end
|
|
|
|
|
2017-04-24 17:51:56 +00:00
|
|
|
def self.binary?
|
|
|
|
binary
|
2017-04-13 17:14:08 +00:00
|
|
|
end
|
|
|
|
|
2017-04-24 17:51:56 +00:00
|
|
|
def self.text?
|
|
|
|
!binary?
|
2017-04-24 14:27:19 +00:00
|
|
|
end
|
|
|
|
|
2017-04-13 17:14:08 +00:00
|
|
|
def self.can_render?(blob)
|
|
|
|
!extensions || extensions.include?(blob.extension)
|
|
|
|
end
|
|
|
|
|
2017-04-21 18:59:34 +00:00
|
|
|
def too_large?
|
|
|
|
blob.raw_size > max_size
|
2017-04-13 17:14:08 +00:00
|
|
|
end
|
|
|
|
|
2017-04-21 18:59:34 +00:00
|
|
|
def absolutely_too_large?
|
|
|
|
blob.raw_size > absolute_max_size
|
|
|
|
end
|
|
|
|
|
|
|
|
def can_override_max_size?
|
|
|
|
too_large? && !absolutely_too_large?
|
2017-04-13 17:14:08 +00:00
|
|
|
end
|
|
|
|
|
2017-04-26 20:29:12 +00:00
|
|
|
# This method is used on the server side to check whether we can attempt to
|
2017-04-27 13:42:32 +00:00
|
|
|
# render the blob at all. Human-readable error messages are found in the
|
2017-04-26 20:29:12 +00:00
|
|
|
# `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.
|
2017-04-21 18:59:34 +00:00
|
|
|
def render_error
|
2017-04-26 20:48:49 +00:00
|
|
|
return @render_error if defined?(@render_error)
|
|
|
|
|
|
|
|
@render_error =
|
2017-05-02 22:45:50 +00:00
|
|
|
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,
|
2017-04-26 20:48:49 +00:00
|
|
|
# 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.
|
2017-05-02 22:45:50 +00:00
|
|
|
:server_side_but_stored_externally
|
2017-04-26 20:48:49 +00:00
|
|
|
elsif override_max_size ? absolutely_too_large? : too_large?
|
|
|
|
:too_large
|
|
|
|
end
|
2017-04-13 17:14:08 +00:00
|
|
|
end
|
|
|
|
|
|
|
|
def prepare!
|
|
|
|
if server_side? && blob.project
|
|
|
|
blob.load_all_data!(blob.project.repository)
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
private
|
|
|
|
|
2017-05-02 22:45:50 +00:00
|
|
|
def server_side_but_stored_externally?
|
|
|
|
server_side? && blob.stored_externally?
|
2017-04-13 17:14:08 +00:00
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|