mirror of
https://github.com/discourse/discourse.git
synced 2024-11-28 14:08:33 +08:00
8b5e42ea16
In the past the filename of the origin was used as the source for the extension of the file when optimizing on upload. We now use the actual calculated extension based on upload data.
375 lines
10 KiB
Ruby
375 lines
10 KiB
Ruby
require_dependency "file_helper"
|
|
require_dependency "url_helper"
|
|
require_dependency "db_helper"
|
|
require_dependency "file_store/local_store"
|
|
|
|
class OptimizedImage < ActiveRecord::Base
|
|
belongs_to :upload
|
|
|
|
# BUMP UP if optimized image algorithm changes
|
|
VERSION = 1
|
|
|
|
def self.lock(upload_id, width, height)
|
|
@hostname ||= `hostname`.strip rescue "unknown"
|
|
# note, the extra lock here ensures we only optimize one image per machine
|
|
# this can very easily lead to runaway CPU so slowing it down is beneficial
|
|
DistributedMutex.synchronize("optimized_image_host_#{@hostname}") do
|
|
DistributedMutex.synchronize("optimized_image_#{upload_id}_#{width}_#{height}") do
|
|
yield
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.create_for(upload, width, height, opts = {})
|
|
return unless width > 0 && height > 0
|
|
return if upload.try(:sha1).blank?
|
|
|
|
# no extension so try to guess it
|
|
if (!upload.extension)
|
|
upload.fix_image_extension
|
|
end
|
|
|
|
if !upload.extension.match?(IM_DECODERS)
|
|
if !opts[:raise_on_error]
|
|
# nothing to do ... bad extension, not an image
|
|
return
|
|
else
|
|
raise InvalidAccess
|
|
end
|
|
end
|
|
|
|
lock(upload.id, width, height) do
|
|
# do we already have that thumbnail?
|
|
thumbnail = find_by(upload_id: upload.id, width: width, height: height)
|
|
|
|
# make sure we have an url
|
|
if thumbnail && thumbnail.url.blank?
|
|
thumbnail.destroy
|
|
thumbnail = nil
|
|
end
|
|
|
|
# return the previous thumbnail if any
|
|
return thumbnail unless thumbnail.nil?
|
|
|
|
# create the thumbnail otherwise
|
|
original_path = Discourse.store.path_for(upload)
|
|
if original_path.blank?
|
|
external_copy = Discourse.store.download(upload) rescue nil
|
|
original_path = external_copy.try(:path)
|
|
end
|
|
|
|
if original_path.blank?
|
|
Rails.logger.error("Could not find file in the store located at url: #{upload.url}")
|
|
else
|
|
# create a temp file with the same extension as the original
|
|
extension = ".#{upload.extension}"
|
|
|
|
if extension.length == 1
|
|
return nil
|
|
end
|
|
|
|
temp_file = Tempfile.new(["discourse-thumbnail", extension])
|
|
temp_path = temp_file.path
|
|
|
|
if extension =~ /\.svg$/i
|
|
FileUtils.cp(original_path, temp_path)
|
|
resized = true
|
|
elsif opts[:crop]
|
|
resized = crop(original_path, temp_path, width, height, opts)
|
|
else
|
|
resized = resize(original_path, temp_path, width, height, opts)
|
|
end
|
|
|
|
if resized
|
|
thumbnail = OptimizedImage.create!(
|
|
upload_id: upload.id,
|
|
sha1: Upload.generate_digest(temp_path),
|
|
extension: extension,
|
|
width: width,
|
|
height: height,
|
|
url: "",
|
|
)
|
|
# store the optimized image and update its url
|
|
File.open(temp_path) do |file|
|
|
url = Discourse.store.store_optimized_image(file, thumbnail)
|
|
if url.present?
|
|
thumbnail.url = url
|
|
thumbnail.save
|
|
end
|
|
end
|
|
end
|
|
|
|
# close && remove temp file
|
|
temp_file.close!
|
|
end
|
|
|
|
# make sure we remove the cached copy from external stores
|
|
if Discourse.store.external?
|
|
external_copy&.close
|
|
end
|
|
|
|
thumbnail
|
|
end
|
|
end
|
|
|
|
def destroy
|
|
OptimizedImage.transaction do
|
|
Discourse.store.remove_optimized_image(self)
|
|
super
|
|
end
|
|
end
|
|
|
|
def local?
|
|
!(url =~ /^(https?:)?\/\//)
|
|
end
|
|
|
|
def self.safe_path?(path)
|
|
# this matches instructions which call #to_s
|
|
path = path.to_s
|
|
return false if path != File.expand_path(path)
|
|
return false if path !~ /\A[\w\-\.\/]+\z/m
|
|
true
|
|
end
|
|
|
|
def self.ensure_safe_paths!(*paths)
|
|
paths.each do |path|
|
|
raise Discourse::InvalidAccess unless safe_path?(path)
|
|
end
|
|
end
|
|
|
|
IM_DECODERS ||= /\A(jpe?g|png|tiff?|bmp|ico|gif)\z/i
|
|
|
|
def self.prepend_decoder!(path, ext_path = nil, opts = nil)
|
|
extension = File.extname((opts && opts[:filename]) || ext_path || path)[1..-1]
|
|
raise Discourse::InvalidAccess if !extension || !extension.match?(IM_DECODERS)
|
|
"#{extension}:#{path}"
|
|
end
|
|
|
|
def self.thumbnail_or_resize
|
|
SiteSetting.strip_image_metadata ? "thumbnail" : "resize"
|
|
end
|
|
|
|
def self.resize_instructions(from, to, dimensions, opts = {})
|
|
ensure_safe_paths!(from, to)
|
|
|
|
# note FROM my not be named correctly
|
|
from = prepend_decoder!(from, to, opts)
|
|
to = prepend_decoder!(to, to, opts)
|
|
|
|
# NOTE: ORDER is important!
|
|
%W{
|
|
convert
|
|
#{from}[0]
|
|
-auto-orient
|
|
-gravity center
|
|
-background transparent
|
|
-#{thumbnail_or_resize} #{dimensions}^
|
|
-extent #{dimensions}
|
|
-interpolate catrom
|
|
-unsharp 2x0.5+0.7+0
|
|
-interlace none
|
|
-quality 98
|
|
-profile #{File.join(Rails.root, 'vendor', 'data', 'RT_sRGB.icm')}
|
|
#{to}
|
|
}
|
|
end
|
|
|
|
def self.resize_instructions_animated(from, to, dimensions, opts = {})
|
|
ensure_safe_paths!(from, to)
|
|
|
|
%W{
|
|
gifsicle
|
|
--colors=256
|
|
--resize-fit #{dimensions}
|
|
--optimize=3
|
|
--output #{to}
|
|
#{from}
|
|
}
|
|
end
|
|
|
|
def self.crop_instructions(from, to, dimensions, opts = {})
|
|
ensure_safe_paths!(from, to)
|
|
|
|
from = prepend_decoder!(from, to, opts)
|
|
to = prepend_decoder!(to, to, opts)
|
|
|
|
%W{
|
|
convert
|
|
#{from}[0]
|
|
-auto-orient
|
|
-gravity north
|
|
-background transparent
|
|
-#{thumbnail_or_resize} #{opts[:width]}
|
|
-crop #{dimensions}+0+0
|
|
-unsharp 2x0.5+0.7+0
|
|
-interlace none
|
|
-quality 98
|
|
-profile #{File.join(Rails.root, 'vendor', 'data', 'RT_sRGB.icm')}
|
|
#{to}
|
|
}
|
|
end
|
|
|
|
def self.crop_instructions_animated(from, to, dimensions, opts = {})
|
|
ensure_safe_paths!(from, to)
|
|
|
|
%W{
|
|
gifsicle
|
|
--crop 0,0+#{dimensions}
|
|
--colors=256
|
|
--optimize=3
|
|
--output #{to}
|
|
#{from}
|
|
}
|
|
end
|
|
|
|
def self.downsize_instructions(from, to, dimensions, opts = {})
|
|
ensure_safe_paths!(from, to)
|
|
|
|
from = prepend_decoder!(from, to, opts)
|
|
to = prepend_decoder!(to, to, opts)
|
|
|
|
%W{
|
|
convert
|
|
#{from}[0]
|
|
-auto-orient
|
|
-gravity center
|
|
-background transparent
|
|
-interlace none
|
|
-resize #{dimensions}
|
|
-profile #{File.join(Rails.root, 'vendor', 'data', 'RT_sRGB.icm')}
|
|
#{to}
|
|
}
|
|
end
|
|
|
|
def self.downsize_instructions_animated(from, to, dimensions, opts = {})
|
|
resize_instructions_animated(from, to, dimensions, opts)
|
|
end
|
|
|
|
def self.resize(from, to, width, height, opts = {})
|
|
optimize("resize", from, to, "#{width}x#{height}", opts)
|
|
end
|
|
|
|
def self.crop(from, to, width, height, opts = {})
|
|
opts[:width] = width
|
|
optimize("crop", from, to, "#{width}x#{height}", opts)
|
|
end
|
|
|
|
def self.downsize(from, to, dimensions, opts = {})
|
|
optimize("downsize", from, to, dimensions, opts)
|
|
end
|
|
|
|
def self.optimize(operation, from, to, dimensions, opts = {})
|
|
method_name = "#{operation}_instructions"
|
|
if !!opts[:allow_animation] && (from =~ /\.GIF$/i)
|
|
method_name += "_animated"
|
|
end
|
|
instructions = self.send(method_name.to_sym, from, to, dimensions, opts)
|
|
convert_with(instructions, to, opts)
|
|
end
|
|
|
|
def self.convert_with(instructions, to, opts = {})
|
|
Discourse::Utils.execute_command(*instructions)
|
|
FileHelper.optimize_image!(to)
|
|
true
|
|
rescue => e
|
|
if opts[:raise_on_error]
|
|
raise e
|
|
else
|
|
error = +"Failed to optimize image:"
|
|
|
|
if e.message =~ /^convert:([^`]+)/
|
|
error << $1
|
|
else
|
|
error << " unknown reason"
|
|
end
|
|
|
|
Discourse.warn(error, location: to, error_message: e.message)
|
|
false
|
|
end
|
|
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.kilobytes
|
|
local_store = FileStore::LocalStore.new
|
|
|
|
scope = OptimizedImage.includes(:upload)
|
|
.where("url NOT LIKE '%/optimized/_X/%'")
|
|
.order(id: :desc)
|
|
|
|
scope.limit(limit) if limit
|
|
|
|
scope.each do |optimized_image|
|
|
begin
|
|
# keep track of the url
|
|
previous_url = optimized_image.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: max_file_size_kb,
|
|
tmp_file_name: "discourse",
|
|
follow_redirect: true
|
|
) rescue nil
|
|
path = file.path
|
|
else
|
|
path = local_store.path_for(optimized_image)
|
|
file = File.open(path)
|
|
end
|
|
# compute SHA if missing
|
|
if optimized_image.sha1.blank?
|
|
optimized_image.sha1 = Upload.generate_digest(path)
|
|
end
|
|
# optimize if image
|
|
FileHelper.optimize_image!(path)
|
|
# store to new location & update the filesize
|
|
File.open(path) do |f|
|
|
optimized_image.url = Discourse.store.store_optimized_image(f, optimized_image)
|
|
optimized_image.save
|
|
end
|
|
# remap the URLs
|
|
DbHelper.remap(UrlHelper.absolute(previous_url), optimized_image.url) unless external
|
|
DbHelper.remap(previous_url, optimized_image.url)
|
|
# remove the old file (when local)
|
|
unless external
|
|
FileUtils.rm(path, force: true)
|
|
end
|
|
rescue => e
|
|
problems << { optimized_image: optimized_image, ex: e }
|
|
# just ditch the optimized image if there was any errors
|
|
optimized_image.destroy
|
|
ensure
|
|
file&.unlink
|
|
file&.close
|
|
end
|
|
end
|
|
end
|
|
|
|
problems
|
|
end
|
|
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: optimized_images
|
|
#
|
|
# id :integer not null, primary key
|
|
# sha1 :string(40) not null
|
|
# extension :string(10) not null
|
|
# width :integer not null
|
|
# height :integer not null
|
|
# upload_id :integer not null
|
|
# url :string not null
|
|
#
|
|
# Indexes
|
|
#
|
|
# index_optimized_images_on_upload_id (upload_id)
|
|
# index_optimized_images_on_upload_id_and_width_and_height (upload_id,width,height) UNIQUE
|
|
#
|