82 lines
2.9 KiB
Ruby
82 lines
2.9 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'mime/types/columnar'
|
|
|
|
module Attachmentable
|
|
extend ActiveSupport::Concern
|
|
|
|
MAX_MATRIX_LIMIT = 16_777_216 # 4096x4096px or approx. 16MB
|
|
GIF_MATRIX_LIMIT = 921_600 # 1280x720px
|
|
|
|
included do
|
|
before_post_process :obfuscate_file_name
|
|
before_post_process :set_file_extensions
|
|
before_post_process :check_image_dimensions
|
|
before_post_process :set_file_content_type
|
|
end
|
|
|
|
private
|
|
|
|
def set_file_content_type
|
|
self.class.attachment_definitions.each_key do |attachment_name|
|
|
attachment = send(attachment_name)
|
|
|
|
next if attachment.blank? || attachment.queued_for_write[:original].blank?
|
|
|
|
attachment.instance_write :content_type, calculated_content_type(attachment)
|
|
end
|
|
end
|
|
|
|
def set_file_extensions
|
|
self.class.attachment_definitions.each_key do |attachment_name|
|
|
attachment = send(attachment_name)
|
|
|
|
next if attachment.blank?
|
|
|
|
attachment.instance_write :file_name, [Paperclip::Interpolations.basename(attachment, :original), appropriate_extension(attachment)].delete_if(&:blank?).join('.')
|
|
end
|
|
end
|
|
|
|
def check_image_dimensions
|
|
self.class.attachment_definitions.each_key do |attachment_name|
|
|
attachment = send(attachment_name)
|
|
|
|
next if attachment.blank? || !/image.*/.match?(attachment.content_type) || attachment.queued_for_write[:original].blank?
|
|
|
|
width, height = FastImage.size(attachment.queued_for_write[:original].path)
|
|
matrix_limit = attachment.content_type == 'image/gif' ? GIF_MATRIX_LIMIT : MAX_MATRIX_LIMIT
|
|
|
|
raise Mastodon::DimensionsValidationError, "#{width}x#{height} images are not supported" if width.present? && height.present? && (width * height > matrix_limit)
|
|
end
|
|
end
|
|
|
|
def appropriate_extension(attachment)
|
|
mime_type = MIME::Types[attachment.content_type]
|
|
|
|
extensions_for_mime_type = mime_type.empty? ? [] : mime_type.first.extensions
|
|
original_extension = Paperclip::Interpolations.extension(attachment, :original)
|
|
proper_extension = extensions_for_mime_type.first.to_s
|
|
extension = extensions_for_mime_type.include?(original_extension) ? original_extension : proper_extension
|
|
extension = 'jpeg' if extension == 'jpe'
|
|
|
|
extension
|
|
end
|
|
|
|
def calculated_content_type(attachment)
|
|
content_type = Paperclip.run('file', '-b --mime :file', file: attachment.queued_for_write[:original].path).split(/[:;\s]+/).first.chomp
|
|
content_type = 'video/mp4' if content_type == 'video/x-m4v'
|
|
content_type
|
|
rescue Terrapin::CommandLineError
|
|
''
|
|
end
|
|
|
|
def obfuscate_file_name
|
|
self.class.attachment_definitions.each_key do |attachment_name|
|
|
attachment = send(attachment_name)
|
|
|
|
next if attachment.blank? || attachment.queued_for_write[:original].blank?
|
|
|
|
attachment.instance_write :file_name, SecureRandom.hex(8) + File.extname(attachment.instance_read(:file_name))
|
|
end
|
|
end
|
|
end
|