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upload.rb
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upload.rb
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# frozen_string_literal: true
require "digest/sha1"
class Upload < ActiveRecord::Base
self.ignored_columns = [
"verified" # TODO(2020-12-10): remove
]
include ActionView::Helpers::NumberHelper
include HasUrl
SHA1_LENGTH = 40
SEEDED_ID_THRESHOLD = 0
URL_REGEX ||= /(\/original\/\dX[\/\.\w]*\/(\h+)[\.\w]*)/
MAX_IDENTIFY_SECONDS = 5
belongs_to :user
belongs_to :access_control_post, class_name: 'Post'
# when we access this post we don't care if the post
# is deleted
def access_control_post
Post.unscoped { super }
end
has_many :post_uploads, dependent: :destroy
has_many :posts, through: :post_uploads
has_many :optimized_images, dependent: :destroy
has_many :user_uploads, dependent: :destroy
has_many :topic_thumbnails
attr_accessor :for_group_message
attr_accessor :for_theme
attr_accessor :for_private_message
attr_accessor :for_export
attr_accessor :for_site_setting
attr_accessor :for_gravatar
validates_presence_of :filesize
validates_presence_of :original_filename
validates_with UploadValidator
before_destroy do
UserProfile.where(card_background_upload_id: self.id).update_all(card_background_upload_id: nil)
UserProfile.where(profile_background_upload_id: self.id).update_all(profile_background_upload_id: nil)
end
after_destroy do
User.where(uploaded_avatar_id: self.id).update_all(uploaded_avatar_id: nil)
UserAvatar.where(gravatar_upload_id: self.id).update_all(gravatar_upload_id: nil)
UserAvatar.where(custom_upload_id: self.id).update_all(custom_upload_id: nil)
end
scope :by_users, -> { where("uploads.id > ?", SEEDED_ID_THRESHOLD) }
def self.verification_statuses
@verification_statuses ||= Enum.new(
unchecked: 1,
verified: 2,
invalid_etag: 3
)
end
def self.with_no_non_post_relations
scope = self
.joins(<<~SQL)
LEFT JOIN site_settings ss
ON NULLIF(ss.value, '')::integer = uploads.id
AND ss.data_type = #{SiteSettings::TypeSupervisor.types[:upload].to_i}
SQL
.where("ss.value IS NULL")
.joins("LEFT JOIN users u ON u.uploaded_avatar_id = uploads.id")
.where("u.uploaded_avatar_id IS NULL")
.joins("LEFT JOIN user_avatars ua ON ua.gravatar_upload_id = uploads.id OR ua.custom_upload_id = uploads.id")
.where("ua.gravatar_upload_id IS NULL AND ua.custom_upload_id IS NULL")
.joins("LEFT JOIN user_profiles up ON up.profile_background_upload_id = uploads.id OR up.card_background_upload_id = uploads.id")
.where("up.profile_background_upload_id IS NULL AND up.card_background_upload_id IS NULL")
.joins("LEFT JOIN categories c ON c.uploaded_logo_id = uploads.id OR c.uploaded_background_id = uploads.id")
.where("c.uploaded_logo_id IS NULL AND c.uploaded_background_id IS NULL")
.joins("LEFT JOIN custom_emojis ce ON ce.upload_id = uploads.id")
.where("ce.upload_id IS NULL")
.joins("LEFT JOIN theme_fields tf ON tf.upload_id = uploads.id")
.where("tf.upload_id IS NULL")
.joins("LEFT JOIN user_exports ue ON ue.upload_id = uploads.id")
.where("ue.upload_id IS NULL")
.joins("LEFT JOIN groups g ON g.flair_upload_id = uploads.id")
.where("g.flair_upload_id IS NULL")
.joins("LEFT JOIN badges b ON b.image_upload_id = uploads.id")
.where("b.image_upload_id IS NULL")
.joins(<<~SQL)
LEFT JOIN theme_settings ts
ON NULLIF(ts.value, '')::integer = uploads.id
AND ts.data_type = #{ThemeSetting.types[:upload].to_i}
SQL
.where("ts.value IS NULL")
if SiteSetting.selectable_avatars.present?
scope = scope.where.not(id: SiteSetting.selectable_avatars.map(&:id))
end
scope
end
def to_s
self.url
end
def thumbnail(width = self.thumbnail_width, height = self.thumbnail_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, opts = nil)
return unless SiteSetting.create_thumbnails?
opts ||= {}
if get_optimized_image(width, height, opts)
save(validate: false)
end
end
# this method attempts to correct old incorrect extensions
def get_optimized_image(width, height, opts = nil)
opts ||= {}
if (!extension || extension.length == 0)
fix_image_extension
end
opts = opts.merge(raise_on_error: true)
begin
OptimizedImage.create_for(self, width, height, opts)
rescue => ex
Rails.logger.info ex if Rails.env.development?
opts = opts.merge(raise_on_error: false)
if fix_image_extension
OptimizedImage.create_for(self, width, height, opts)
else
nil
end
end
end
def fix_image_extension
return false if extension == "unknown"
begin
# this is relatively cheap once cached
original_path = Discourse.store.path_for(self)
if original_path.blank?
external_copy = Discourse.store.download(self) rescue nil
original_path = external_copy.try(:path)
end
image_info = FastImage.new(original_path) rescue nil
new_extension = image_info&.type&.to_s || "unknown"
if new_extension != self.extension
self.update_columns(extension: new_extension)
true
end
rescue
self.update_columns(extension: "unknown")
true
end
end
def destroy
Upload.transaction do
Discourse.store.remove_upload(self)
super
end
end
def short_url
"upload://#{short_url_basename}"
end
def uploaded_before_secure_media_enabled?
original_sha1.blank?
end
def matching_access_control_post?(post)
access_control_post_id == post.id
end
def copied_from_other_post?(post)
return false if access_control_post_id.blank?
!matching_access_control_post?(post)
end
def short_path
self.class.short_path(sha1: self.sha1, extension: self.extension)
end
def self.consider_for_reuse(upload, post)
return upload if !SiteSetting.secure_media? || upload.blank? || post.blank?
return nil if !upload.matching_access_control_post?(post) || upload.uploaded_before_secure_media_enabled?
upload
end
def self.secure_media_url?(url)
# we do not want to exclude topic links that for whatever reason
# have secure-media-uploads in the URL e.g. /t/secure-media-uploads-are-cool/223452
route = UrlHelper.rails_route_from_url(url)
return false if route.blank?
route[:action] == "show_secure" && route[:controller] == "uploads" && FileHelper.is_supported_media?(url)
rescue ActionController::RoutingError
false
end
def self.signed_url_from_secure_media_url(url)
route = UrlHelper.rails_route_from_url(url)
url = Rails.application.routes.url_for(route.merge(only_path: true))
secure_upload_s3_path = url[url.index(route[:path])..-1]
Discourse.store.signed_url_for_path(secure_upload_s3_path)
end
def self.secure_media_url_from_upload_url(url)
return url if !url.include?(SiteSetting.Upload.absolute_base_url)
uri = URI.parse(url)
Rails.application.routes.url_for(
controller: "uploads",
action: "show_secure",
path: uri.path[1..-1],
only_path: true
)
end
def self.short_path(sha1:, extension:)
@url_helpers ||= Rails.application.routes.url_helpers
@url_helpers.upload_short_path(
base62: self.base62_sha1(sha1),
extension: extension
)
end
def self.base62_sha1(sha1)
Base62.encode(sha1.hex)
end
def base62_sha1
Upload.base62_sha1(self.sha1)
end
def local?
!(url =~ /^(https?:)?\/\//)
end
def fix_dimensions!
return if !FileHelper.is_supported_image?("image.#{extension}")
path =
if local?
Discourse.store.path_for(self)
else
Discourse.store.download(self).path
end
begin
if extension == 'svg'
w, h = Discourse::Utils.execute_command("identify", "-format", "%w %h", path, timeout: MAX_IDENTIFY_SECONDS).split(' ') rescue [0, 0]
else
w, h = FastImage.new(path, raise_on_failure: true).size
end
self.width = w || 0
self.height = h || 0
self.thumbnail_width, self.thumbnail_height = ImageSizer.resize(w, h)
self.update_columns(
width: width,
height: height,
thumbnail_width: thumbnail_width,
thumbnail_height: thumbnail_height
)
rescue => e
Discourse.warn_exception(e, message: "Error getting image dimensions")
end
nil
end
# on demand image size calculation, this allows us to null out image sizes
# and still handle as needed
def get_dimension(key)
if v = read_attribute(key)
return v
end
fix_dimensions!
read_attribute(key)
end
def width
get_dimension(:width)
end
def height
get_dimension(:height)
end
def thumbnail_width
get_dimension(:thumbnail_width)
end
def thumbnail_height
get_dimension(:thumbnail_height)
end
def target_image_quality(local_path, test_quality)
@file_quality ||= Discourse::Utils.execute_command("identify", "-format", "%Q", local_path, timeout: MAX_IDENTIFY_SECONDS).to_i rescue 0
if @file_quality == 0 || @file_quality > test_quality
test_quality
end
end
def self.sha1_from_short_path(path)
if path =~ /(\/uploads\/short-url\/)([a-zA-Z0-9]+)(\..*)?/
self.sha1_from_base62_encoded($2)
end
end
def self.sha1_from_short_url(url)
if url =~ /(upload:\/\/)?([a-zA-Z0-9]+)(\..*)?/
self.sha1_from_base62_encoded($2)
end
end
def self.sha1_from_base62_encoded(encoded_sha1)
sha1 = Base62.decode(encoded_sha1).to_s(16)
if sha1.length > SHA1_LENGTH
nil
else
sha1.rjust(SHA1_LENGTH, '0')
end
end
def self.generate_digest(path)
Digest::SHA1.file(path).hexdigest
end
def human_filesize
number_to_human_size(self.filesize)
end
def rebake_posts_on_old_scheme
self.posts.where("cooked LIKE '%/_optimized/%'").find_each(&:rebake!)
end
def update_secure_status(source: "unknown", override: nil)
if override.nil?
mark_secure, reason = UploadSecurity.new(self).should_be_secure_with_reason
else
mark_secure = override
reason = "manually overridden"
end
secure_status_did_change = self.secure? != mark_secure
self.update(secure_params(mark_secure, reason, source))
if Discourse.store.external?
begin
Discourse.store.update_upload_ACL(self)
rescue Aws::S3::Errors::NotImplemented => err
Discourse.warn_exception(err, message: "The file store object storage provider does not support setting ACLs")
end
end
secure_status_did_change
end
def secure_params(secure, reason, source = "unknown")
{
secure: secure,
security_last_changed_reason: reason + " | source: #{source}",
security_last_changed_at: Time.zone.now
}
end
def self.migrate_to_new_scheme(limit: nil)
problems = []
DistributedMutex.synchronize("migrate_upload_to_new_scheme") do
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
db = RailsMultisite::ConnectionManagement.current_db
scope = Upload.by_users
.where("url NOT LIKE '%/original/_X/%' AND url LIKE '%/uploads/#{db}%'")
.order(id: :desc)
scope = scope.limit(limit) if limit
if scope.count == 0
SiteSetting.migrate_to_new_scheme = false
return problems
end
remap_scope = nil
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
begin
retries ||= 0
file = FileHelper.download(
url,
max_file_size: max_file_size_kb,
tmp_file_name: "discourse",
follow_redirect: true
)
rescue OpenURI::HTTPError
retry if (retries += 1) < 1
next
end
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
# 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!(validate: false)
end
# remap the URLs
DbHelper.remap(UrlHelper.absolute(previous_url), upload.url) unless external
DbHelper.remap(
previous_url,
upload.url,
excluded_tables: %w{
posts
post_search_data
incoming_emails
notifications
single_sign_on_records
stylesheet_cache
topic_search_data
users
user_emails
draft_sequences
optimized_images
}
)
remap_scope ||= begin
Post.with_deleted
.where("raw ~ '/uploads/#{db}/\\d+/' OR raw ~ '/uploads/#{db}/original/(\\d|[a-z])/'")
.select(:id, :raw, :cooked)
.all
end
remap_scope.each do |post|
post.raw.gsub!(previous_url, upload.url)
post.cooked.gsub!(previous_url, upload.url)
Post.with_deleted.where(id: post.id).update_all(raw: post.raw, cooked: post.cooked) if post.changed?
end
upload.optimized_images.find_each(&:destroy!)
upload.rebake_posts_on_old_scheme
# remove the old file (when local)
unless external
FileUtils.rm(path, force: true)
end
rescue => e
problems << { upload: upload, ex: e }
ensure
file&.unlink
file&.close
end
end
end
end
problems
end
private
def short_url_basename
"#{Upload.base62_sha1(sha1)}#{extension.present? ? ".#{extension}" : ""}"
end
end
# == Schema Information
#
# Table name: uploads
#
# id :integer not null, primary key
# user_id :integer not null
# original_filename :string not null
# filesize :bigint 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
# extension :string(10)
# thumbnail_width :integer
# thumbnail_height :integer
# etag :string
# secure :boolean default(FALSE), not null
# access_control_post_id :bigint
# original_sha1 :string
# verification_status :integer default(1), not null
# animated :boolean
# security_last_changed_at :datetime
# security_last_changed_reason :string
#
# Indexes
#
# idx_uploads_on_verification_status (verification_status)
# index_uploads_on_access_control_post_id (access_control_post_id)
# index_uploads_on_etag (etag)
# index_uploads_on_extension (lower((extension)::text))
# index_uploads_on_id_and_url (id,url)
# index_uploads_on_original_sha1 (original_sha1)
# index_uploads_on_sha1 (sha1) UNIQUE
# index_uploads_on_url (url)
# index_uploads_on_user_id (user_id)
#