mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 21:10:17 +08:00
112 lines
4.2 KiB
Ruby
112 lines
4.2 KiB
Ruby
task "images:compress" => :environment do
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io = ImageOptim.new
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images = Dir.glob("#{Rails.root}/app/**/*.png")
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image_sizes = Hash[*images.map{|i| [i,File.size(i)]}.to_a.flatten]
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io.optimize_images!(images) do |name, optimized|
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if optimized
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new_size = File.size(name)
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puts "#{name} => from: #{image_sizes[name.to_s]} to: #{new_size}"
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end
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end
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end
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desc "download all hotlinked images"
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task "images:pull_hotlinked" => :environment do
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RailsMultisite::ConnectionManagement.each_connection do |db|
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# currently only works when using the local storage
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next if Discourse.store.external?
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puts "Pulling hotlinked images for: #{db}"
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# shorthand to the asset host
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asset_host = Rails.configuration.action_controller.asset_host
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# maximum size of the file in bytes
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max_size = SiteSetting.max_image_size_kb * 1024
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# will hold the urls of the already downloaded images
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upload_urls = {}
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Post.find_each do |post|
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has_changed = false
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extract_images_from(post.cooked).each do |image|
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src = image['src']
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if src.present? &&
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src !~ /^\/[^\/]/ &&
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!src.starts_with?(Discourse.base_url_no_prefix) &&
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!(asset_host.present? && src.starts_with?(asset_host))
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begin
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# have we already downloaded that file?
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if !upload_urls.include?(src)
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# initialize
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upload_urls[src] = nil
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# download the file
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hotlinked = download(src, max_size)
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# if the hotlinked image is OK
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if hotlinked.size <= max_size
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file = ActionDispatch::Http::UploadedFile.new(tempfile: hotlinked, filename: File.basename(URI.parse(src).path))
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upload_urls[src] = Upload.create_for(post.user_id, file, hotlinked.size).url
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else
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puts "\nFailed to pull: #{src} for post ##{post.id} - too large\n"
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end
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end
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# if we have downloaded a file
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if upload_urls[src].present?
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src_for_regexp = src.gsub("?", "\\?").gsub(".", "\\.").gsub("+", "\\+")
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# there are 5 ways to insert an image in a post
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# HTML tag - <img src="http://...">
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post.raw.gsub!(/src=["']#{src_for_regexp}["']/i, "src='#{upload_urls[src]}'")
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# BBCode tag - [img]http://...[/img]
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post.raw.gsub!(/\[img\]#{src_for_regexp}\[\/img\]/i, "[img]#{upload_urls[src]}[/img]")
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# Markdown inline - 
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post.raw.gsub!(/!\[([^\]]*)\]\(#{src_for_regexp}\)/) { "" }
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# Markdown reference - [x]: http://
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post.raw.gsub!(/\[(\d+)\]: #{src_for_regexp}/) { "[#{$1}]: #{upload_urls[src]}" }
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# Direct link
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post.raw.gsub!(src, "<img src='#{upload_urls[src]}'>")
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# mark the post as changed
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has_changed = true
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end
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rescue => e
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puts "\nFailed to pull: #{src} for post ##{post.id} - #{e}\n"
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ensure
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# close & delete the temporary file
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hotlinked && hotlinked.close!
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end
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end
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end
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if has_changed
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# since the raw has changed, we cook the post once again
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post.cooked = post.cook(post.raw, topic_id: post.topic_id, invalidate_oneboxes: true)
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# update both raw & cooked version of the post
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Post.exec_sql('update posts set cooked = ?, raw = ? where id = ?', post.cooked, post.raw, post.id)
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# trigger the post processing
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post.trigger_post_process
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putc "#"
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else
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putc "."
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end
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end
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end
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puts "\ndone."
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end
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def extract_images_from(html)
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doc = Nokogiri::HTML::fragment(html)
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doc.css("img") - doc.css(".onebox-result img") - doc.css("img.avatar")
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end
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def download(url, max_size)
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# create a temporary file
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temp_file = Tempfile.new(["discourse-hotlinked", File.extname(URI.parse(url).path)])
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# download the hotlinked image
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File.open(temp_file.path, "wb") do |f|
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hotlinked = open(url, "rb", read_timeout: 5)
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while f.size <= max_size && data = hotlinked.read(max_size)
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f.write(data)
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end
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hotlinked.close
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end
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temp_file
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end
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