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Validate HTTP response length while receiving (#6891)

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to_s method of HTTP::Response keeps blocking while it receives the whole
content, no matter how it is big. This means it may waste time to receive
unacceptably large files. It may also consume memory and disk in the
process. This solves the inefficency by checking response length while
receiving.
This commit is contained in:
Akihiko Odaki 2018-03-26 21:02:10 +09:00 • committed by Eugen Rochko
parent 18965cb0e6
commit 40e5d2303b
18 changed files with 115 additions and 26 deletions
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6
app/models/custom_emoji.rb
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@ -19,6 +19,8 @@
#
class CustomEmoji < ApplicationRecord
LIMIT = 50.kilobytes
SHORTCODE_RE_FRAGMENT = '[a-zA-Z0-9_]{2,}'
SCAN_RE = /(?<=[^[:alnum:]:]|\n|^)
@ -29,14 +31,14 @@ class CustomEmoji < ApplicationRecord
has_attached_file :image, styles: { static: { format: 'png', convert_options: '-coalesce -strip' } }
validates_attachment :image, content_type: { content_type: 'image/png' }, presence: true, size: { in: 0..50.kilobytes }
validates_attachment :image, content_type: { content_type: 'image/png' }, presence: true, size: { less_than: LIMIT }
validates :shortcode, uniqueness: { scope: :domain }, format: { with: /\A#{SHORTCODE_RE_FRAGMENT}\z/ }, length: { minimum: 2 }
scope :local, -> { where(domain: nil) }
scope :remote, -> { where.not(domain: nil) }
scope :alphabetic, -> { order(domain: :asc, shortcode: :asc) }
include Remotable
remotable_attachment :image, LIMIT
def local?
domain.nil?