mirror of
https://github.com/discourse/discourse.git
synced 2024-12-13 05:23:42 +08:00
342 lines
10 KiB
Ruby
342 lines
10 KiB
Ruby
require "digest/sha1"
|
||
require_dependency "image_sizer"
|
||
require_dependency "file_helper"
|
||
require_dependency "url_helper"
|
||
require_dependency "db_helper"
|
||
require_dependency "validators/upload_validator"
|
||
require_dependency "file_store/local_store"
|
||
|
||
class Upload < ActiveRecord::Base
|
||
belongs_to :user
|
||
|
||
has_many :post_uploads, dependent: :destroy
|
||
has_many :posts, through: :post_uploads
|
||
|
||
has_many :optimized_images, dependent: :destroy
|
||
|
||
attr_accessor :is_attachment_for_group_message
|
||
|
||
validates_presence_of :filesize
|
||
validates_presence_of :original_filename
|
||
|
||
validates_with ::Validators::UploadValidator
|
||
|
||
def thumbnail(width = self.width, height = self.height)
|
||
optimized_images.find_by(width: width, height: height)
|
||
end
|
||
|
||
def has_thumbnail?(width, height)
|
||
thumbnail(width, height).present?
|
||
end
|
||
|
||
def create_thumbnail!(width, height, crop=false)
|
||
return unless SiteSetting.create_thumbnails?
|
||
|
||
opts = {
|
||
filename: self.original_filename,
|
||
allow_animation: SiteSetting.allow_animated_thumbnails,
|
||
crop: crop
|
||
}
|
||
|
||
if thumbnail = OptimizedImage.create_for(self, width, height, opts)
|
||
self.width = width
|
||
self.height = height
|
||
save(validate: false)
|
||
end
|
||
end
|
||
|
||
def destroy
|
||
Upload.transaction do
|
||
Discourse.store.remove_upload(self)
|
||
super
|
||
end
|
||
end
|
||
|
||
def extension
|
||
File.extname(original_filename)
|
||
end
|
||
|
||
# list of image types that will be cropped
|
||
CROPPED_IMAGE_TYPES ||= %w{
|
||
avatar
|
||
profile_background
|
||
card_background
|
||
custom_emoji
|
||
}
|
||
|
||
WHITELISTED_SVG_ELEMENTS ||= %w{
|
||
circle
|
||
clippath
|
||
defs
|
||
ellipse
|
||
g
|
||
line
|
||
linearGradient
|
||
path
|
||
polygon
|
||
polyline
|
||
radialGradient
|
||
rect
|
||
stop
|
||
svg
|
||
text
|
||
textpath
|
||
tref
|
||
tspan
|
||
use
|
||
}
|
||
|
||
def self.generate_digest(path)
|
||
Digest::SHA1.file(path).hexdigest
|
||
end
|
||
|
||
def self.svg_whitelist_xpath
|
||
@@svg_whitelist_xpath ||= "//*[#{WHITELISTED_SVG_ELEMENTS.map { |e| "name()!='#{e}'" }.join(" and ") }]"
|
||
end
|
||
|
||
# options
|
||
# - content_type
|
||
# - origin (url)
|
||
# - image_type ("avatar", "profile_background", "card_background", "custom_emoji")
|
||
# - is_attachment_for_group_message (boolean)
|
||
def self.create_for(user_id, file, filename, filesize, options = {})
|
||
upload = Upload.new
|
||
|
||
DistributedMutex.synchronize("upload_#{user_id}_#{filename}") do
|
||
# do some work on images
|
||
if FileHelper.is_image?(filename) && is_actual_image?(file)
|
||
# retrieve image info
|
||
w, h = FastImage.size(file) || [0, 0]
|
||
|
||
if filename[/\.svg$/i]
|
||
# whitelist svg elements
|
||
doc = Nokogiri::XML(file)
|
||
doc.xpath(svg_whitelist_xpath).remove
|
||
File.write(file.path, doc.to_s)
|
||
file.rewind
|
||
else
|
||
if w * h >= SiteSetting.max_image_megapixels * 1_000_000
|
||
upload.errors.add(:base, I18n.t("upload.images.larger_than_x_megapixels", max_image_megapixels: SiteSetting.max_image_megapixels))
|
||
return upload
|
||
end
|
||
|
||
# fix orientation first
|
||
fix_image_orientation(file.path) if should_optimize?(file.path, [w, h])
|
||
end
|
||
|
||
# default size
|
||
width, height = ImageSizer.resize(w, h)
|
||
|
||
# make sure we're at the beginning of the file (both FastImage and Nokogiri move the pointer)
|
||
file.rewind
|
||
|
||
# crop images depending on their type
|
||
if CROPPED_IMAGE_TYPES.include?(options[:image_type])
|
||
allow_animation = SiteSetting.allow_animated_thumbnails
|
||
max_pixel_ratio = Discourse::PIXEL_RATIOS.max
|
||
|
||
case options[:image_type]
|
||
when "avatar"
|
||
allow_animation = SiteSetting.allow_animated_avatars
|
||
width = height = Discourse.avatar_sizes.max
|
||
OptimizedImage.resize(file.path, file.path, width, height, filename: filename, allow_animation: allow_animation)
|
||
when "profile_background"
|
||
max_width = 850 * max_pixel_ratio
|
||
width, height = ImageSizer.resize(w, h, max_width: max_width, max_height: max_width)
|
||
OptimizedImage.downsize(file.path, file.path, "#{width}x#{height}", filename: filename, allow_animation: allow_animation)
|
||
when "card_background"
|
||
max_width = 590 * max_pixel_ratio
|
||
width, height = ImageSizer.resize(w, h, max_width: max_width, max_height: max_width)
|
||
OptimizedImage.downsize(file.path, file.path, "#{width}x#{height}", filename: filename, allow_animation: allow_animation)
|
||
when "custom_emoji"
|
||
OptimizedImage.downsize(file.path, file.path, "100x100", filename: filename, allow_animation: allow_animation)
|
||
end
|
||
end
|
||
|
||
# optimize image (except GIFs, SVGs and large PNGs)
|
||
if should_optimize?(file.path, [w, h])
|
||
ImageOptim.new.optimize_image!(file.path) rescue nil
|
||
# update the file size
|
||
filesize = File.size(file.path)
|
||
end
|
||
end
|
||
|
||
# compute the sha of the file
|
||
sha1 = Upload.generate_digest(file)
|
||
|
||
# do we already have that upload?
|
||
upload = find_by(sha1: sha1)
|
||
|
||
# make sure the previous upload has not failed
|
||
if upload && (upload.url.blank? || is_dimensionless_image?(filename, upload.width, upload.height))
|
||
upload.destroy
|
||
upload = nil
|
||
end
|
||
|
||
# return the previous upload if any
|
||
return upload unless upload.nil?
|
||
|
||
# create the upload otherwise
|
||
upload = Upload.new
|
||
upload.user_id = user_id
|
||
upload.original_filename = filename
|
||
upload.filesize = filesize
|
||
upload.sha1 = sha1
|
||
upload.url = ""
|
||
upload.width = width
|
||
upload.height = height
|
||
upload.origin = options[:origin][0...1000] if options[:origin]
|
||
|
||
if options[:is_attachment_for_group_message]
|
||
upload.is_attachment_for_group_message = true
|
||
end
|
||
|
||
if is_dimensionless_image?(filename, upload.width, upload.height)
|
||
upload.errors.add(:base, I18n.t("upload.images.size_not_found"))
|
||
return upload
|
||
end
|
||
|
||
return upload unless upload.save
|
||
|
||
# store the file and update its url
|
||
File.open(file.path) do |f|
|
||
url = Discourse.store.store_upload(f, upload, options[:content_type])
|
||
if url.present?
|
||
upload.url = url
|
||
upload.save
|
||
else
|
||
upload.errors.add(:url, I18n.t("upload.store_failure", { upload_id: upload.id, user_id: user_id }))
|
||
end
|
||
end
|
||
|
||
upload
|
||
end
|
||
end
|
||
|
||
def self.is_actual_image?(file)
|
||
# due to ImageMagick CVE-2016–3714, use FastImage to check the magic bytes
|
||
# cf. https://meta.discourse.org/t/imagemagick-cve-2016-3714/43624
|
||
FastImage.size(file, raise_on_failure: true)
|
||
rescue
|
||
false
|
||
end
|
||
|
||
LARGE_PNG_SIZE ||= 3.megabytes
|
||
|
||
def self.should_optimize?(path, dimensions = nil)
|
||
# don't optimize GIFs or SVGs
|
||
return false if path =~ /\.(gif|svg)$/i
|
||
return true if path !~ /\.png$/i
|
||
|
||
dimensions ||= (FastImage.size(path) || [0, 0])
|
||
w, h = dimensions
|
||
# don't optimize large PNGs
|
||
w > 0 && h > 0 && w * h < LARGE_PNG_SIZE
|
||
end
|
||
|
||
def self.is_dimensionless_image?(filename, width, height)
|
||
FileHelper.is_image?(filename) && (width.blank? || width == 0 || height.blank? || height == 0)
|
||
end
|
||
|
||
def self.get_from_url(url)
|
||
return if url.blank?
|
||
# we store relative urls, so we need to remove any host/cdn
|
||
url = url.sub(Discourse.asset_host, "") if Discourse.asset_host.present?
|
||
# when using s3, we need to replace with the absolute base url
|
||
url = url.sub(SiteSetting.s3_cdn_url, Discourse.store.absolute_base_url) if SiteSetting.s3_cdn_url.present?
|
||
|
||
# always try to get the path
|
||
uri = URI(url) rescue nil
|
||
url = uri.path if uri.try(:scheme)
|
||
|
||
Upload.find_by(url: url)
|
||
end
|
||
|
||
def self.fix_image_orientation(path)
|
||
Discourse::Utils.execute_command('convert', path, '-auto-orient', path)
|
||
end
|
||
|
||
def self.migrate_to_new_scheme(limit=nil)
|
||
problems = []
|
||
|
||
if SiteSetting.migrate_to_new_scheme
|
||
max_file_size_kb = [SiteSetting.max_image_size_kb, SiteSetting.max_attachment_size_kb].max.kilobytes
|
||
local_store = FileStore::LocalStore.new
|
||
|
||
scope = Upload.where("url NOT LIKE '%/original/_X/%'").order(id: :desc)
|
||
scope.limit(limit) if limit
|
||
|
||
scope.each do |upload|
|
||
begin
|
||
# keep track of the url
|
||
previous_url = upload.url.dup
|
||
# where is the file currently stored?
|
||
external = previous_url =~ /^\/\//
|
||
# download if external
|
||
if external
|
||
url = SiteSetting.scheme + ":" + previous_url
|
||
file = FileHelper.download(url, max_file_size_kb, "discourse", true) rescue nil
|
||
path = file.path
|
||
else
|
||
path = local_store.path_for(upload)
|
||
end
|
||
# compute SHA if missing
|
||
if upload.sha1.blank?
|
||
upload.sha1 = Upload.generate_digest(path)
|
||
end
|
||
# optimize if image
|
||
if FileHelper.is_image?(File.basename(path))
|
||
ImageOptim.new.optimize_image!(path)
|
||
end
|
||
# store to new location & update the filesize
|
||
File.open(path) do |f|
|
||
upload.url = Discourse.store.store_upload(f, upload)
|
||
upload.filesize = f.size
|
||
upload.save!
|
||
end
|
||
# remap the URLs
|
||
DbHelper.remap(UrlHelper.absolute(previous_url), upload.url) unless external
|
||
DbHelper.remap(previous_url, upload.url)
|
||
# remove the old file (when local)
|
||
unless external
|
||
FileUtils.rm(path, force: true) rescue nil
|
||
end
|
||
rescue => e
|
||
problems << { upload: upload, ex: e }
|
||
ensure
|
||
file.try(:unlink) rescue nil
|
||
file.try(:close) rescue nil
|
||
end
|
||
end
|
||
end
|
||
|
||
problems
|
||
end
|
||
|
||
end
|
||
|
||
# == Schema Information
|
||
#
|
||
# Table name: uploads
|
||
#
|
||
# id :integer not null, primary key
|
||
# user_id :integer not null
|
||
# original_filename :string not null
|
||
# filesize :integer not null
|
||
# width :integer
|
||
# height :integer
|
||
# url :string not null
|
||
# created_at :datetime not null
|
||
# updated_at :datetime not null
|
||
# sha1 :string(40)
|
||
# origin :string(1000)
|
||
# retain_hours :integer
|
||
#
|
||
# Indexes
|
||
#
|
||
# index_uploads_on_id_and_url (id,url)
|
||
# index_uploads_on_sha1 (sha1) UNIQUE
|
||
# index_uploads_on_url (url)
|
||
# index_uploads_on_user_id (user_id)
|
||
#
|