mirror of
https://github.com/discourse/discourse.git
synced 2024-11-25 00:43:24 +08:00
755ca0fcbb
Previously we would unconditionally fetch all images via HTTP to grab original sizing from cooked post processor in 2 different spots. This was wasteful as we already calculate and cache this info in upload records. This also simplifies some specs and reduces use of mocks.
437 lines
14 KiB
Ruby
437 lines
14 KiB
Ruby
# frozen_string_literal: true
|
||
|
||
# Post processing that we can do after a post has already been cooked.
|
||
# For example, inserting the onebox content, or image sizes/thumbnails.
|
||
|
||
class CookedPostProcessor
|
||
include CookedProcessorMixin
|
||
|
||
LIGHTBOX_WRAPPER_CSS_CLASS = "lightbox-wrapper"
|
||
GIF_SOURCES_REGEXP = /(giphy|tenor)\.com\//
|
||
|
||
attr_reader :cooking_options, :doc
|
||
|
||
def initialize(post, opts = {})
|
||
@dirty = false
|
||
@opts = opts
|
||
@post = post
|
||
@model = post
|
||
@previous_cooked = (@post.cooked || "").dup
|
||
# NOTE: we re-cook the post here in order to prevent timing issues with edits
|
||
# cf. https://meta.discourse.org/t/edit-of-rebaked-post-doesnt-show-in-html-only-in-raw/33815/6
|
||
@cooking_options = post.cooking_options || opts[:cooking_options] || {}
|
||
@cooking_options[:topic_id] = post.topic_id
|
||
@cooking_options = @cooking_options.symbolize_keys
|
||
@with_secure_uploads = @post.with_secure_uploads?
|
||
@category_id = @post&.topic&.category_id
|
||
|
||
cooked = post.cook(post.raw, @cooking_options)
|
||
@doc = Loofah.fragment(cooked)
|
||
@has_oneboxes = post.post_analyzer.found_oneboxes?
|
||
@size_cache = {}
|
||
|
||
@disable_dominant_color = !!opts[:disable_dominant_color]
|
||
@omit_nofollow = post.omit_nofollow?
|
||
end
|
||
|
||
def post_process(new_post: false)
|
||
DistributedMutex.synchronize("post_process_#{@post.id}", validity: 10.minutes) do
|
||
DiscourseEvent.trigger(:before_post_process_cooked, @doc, @post)
|
||
remove_full_quote_on_direct_reply if new_post
|
||
post_process_oneboxes
|
||
post_process_images
|
||
add_blocked_hotlinked_media_placeholders
|
||
post_process_quotes
|
||
optimize_urls
|
||
remove_user_ids
|
||
update_post_image
|
||
enforce_nofollow
|
||
grant_badges
|
||
@post.link_post_uploads(fragments: @doc)
|
||
DiscourseEvent.trigger(:post_process_cooked, @doc, @post)
|
||
nil
|
||
end
|
||
end
|
||
|
||
def has_emoji?
|
||
(@doc.css("img.emoji") - @doc.css(".quote img")).size > 0
|
||
end
|
||
|
||
def grant_badges
|
||
return if @post.user.blank? || !Guardian.new.can_see?(@post)
|
||
|
||
BadgeGranter.grant(Badge.find(Badge::FirstEmoji), @post.user, post_id: @post.id) if has_emoji?
|
||
BadgeGranter.grant(Badge.find(Badge::FirstOnebox), @post.user, post_id: @post.id) if @has_oneboxes
|
||
BadgeGranter.grant(Badge.find(Badge::FirstReplyByEmail), @post.user, post_id: @post.id) if @post.is_reply_by_email?
|
||
end
|
||
|
||
def post_process_quotes
|
||
@doc.css("aside.quote").each do |q|
|
||
post_number = q['data-post']
|
||
topic_id = q['data-topic']
|
||
if topic_id && post_number
|
||
comparer = QuoteComparer.new(
|
||
topic_id.to_i,
|
||
post_number.to_i,
|
||
q.css('blockquote').text
|
||
)
|
||
|
||
q['class'] = ((q['class'] || '') + " quote-post-not-found").strip if comparer.missing?
|
||
q['class'] = ((q['class'] || '') + " quote-modified").strip if comparer.modified?
|
||
end
|
||
end
|
||
end
|
||
|
||
def remove_full_quote_on_direct_reply
|
||
return if !SiteSetting.remove_full_quote
|
||
return if @post.post_number == 1
|
||
return if @doc.xpath("aside[contains(@class, 'quote')]").size != 1
|
||
|
||
previous = Post
|
||
.where("post_number < ? AND topic_id = ? AND post_type = ? AND NOT hidden", @post.post_number, @post.topic_id, Post.types[:regular])
|
||
.order("post_number DESC")
|
||
.limit(1)
|
||
.pluck(:cooked)
|
||
.first
|
||
|
||
return if previous.blank?
|
||
|
||
previous_text = Nokogiri::HTML5::fragment(previous).text.strip
|
||
quoted_text = @doc.css("aside.quote:first-child blockquote").first&.text&.strip || ""
|
||
|
||
return if previous_text.gsub(/(\s){2,}/, '\1') != quoted_text.gsub(/(\s){2,}/, '\1')
|
||
|
||
quote_regexp = /\A\s*\[quote.+\[\/quote\]/im
|
||
quoteless_raw = @post.raw.sub(quote_regexp, "").strip
|
||
|
||
return if @post.raw.strip == quoteless_raw
|
||
|
||
PostRevisor.new(@post).revise!(
|
||
Discourse.system_user,
|
||
{
|
||
raw: quoteless_raw,
|
||
edit_reason: I18n.t(:removed_direct_reply_full_quotes)
|
||
},
|
||
skip_validations: true,
|
||
bypass_bump: true
|
||
)
|
||
end
|
||
|
||
def extract_images
|
||
# all images with a src attribute
|
||
@doc.css("img[src], img[#{PrettyText::BLOCKED_HOTLINKED_SRC_ATTR}]") -
|
||
# minus data images
|
||
@doc.css("img[src^='data']") -
|
||
# minus emojis
|
||
@doc.css("img.emoji")
|
||
end
|
||
|
||
def extract_images_for_post
|
||
# all images with a src attribute
|
||
@doc.css("img[src]") -
|
||
# minus emojis
|
||
@doc.css("img.emoji") -
|
||
# minus images inside quotes
|
||
@doc.css(".quote img") -
|
||
# minus onebox site icons
|
||
@doc.css("img.site-icon") -
|
||
# minus onebox avatars
|
||
@doc.css("img.onebox-avatar") -
|
||
@doc.css("img.onebox-avatar-inline") -
|
||
# minus github onebox profile images
|
||
@doc.css(".onebox.githubfolder img")
|
||
end
|
||
|
||
def convert_to_link!(img)
|
||
w, h = img["width"].to_i, img["height"].to_i
|
||
user_width, user_height = (w > 0 && h > 0 && [w, h]) ||
|
||
get_size_from_attributes(img) ||
|
||
get_size_from_image_sizes(img["src"], @opts[:image_sizes])
|
||
|
||
limit_size!(img)
|
||
|
||
src = img["src"]
|
||
return if src.blank? || is_a_hyperlink?(img) || is_svg?(img)
|
||
|
||
upload = Upload.get_from_url(src)
|
||
|
||
original_width, original_height = nil
|
||
|
||
if (upload.present?)
|
||
original_width = upload.width || 0
|
||
original_height = upload.height || 0
|
||
else
|
||
original_width, original_height = (get_size(src) || [0, 0]).map(&:to_i)
|
||
if original_width == 0 || original_height == 0
|
||
Rails.logger.info "Can't reach '#{src}' to get its dimension."
|
||
return
|
||
end
|
||
end
|
||
|
||
if (upload.present? && upload.animated?) || src.match?(GIF_SOURCES_REGEXP)
|
||
img.add_class("animated")
|
||
end
|
||
|
||
return if original_width <= SiteSetting.max_image_width && original_height <= SiteSetting.max_image_height
|
||
|
||
user_width, user_height = [original_width, original_height] if user_width.to_i <= 0 && user_height.to_i <= 0
|
||
width, height = user_width, user_height
|
||
|
||
crop = SiteSetting.min_ratio_to_crop > 0 && width.to_f / height.to_f < SiteSetting.min_ratio_to_crop
|
||
|
||
if crop
|
||
width, height = ImageSizer.crop(width, height)
|
||
img["width"], img["height"] = width, height
|
||
else
|
||
width, height = ImageSizer.resize(width, height)
|
||
end
|
||
|
||
if upload.present?
|
||
upload.create_thumbnail!(width, height, crop: crop)
|
||
|
||
each_responsive_ratio do |ratio|
|
||
resized_w = (width * ratio).to_i
|
||
resized_h = (height * ratio).to_i
|
||
|
||
if upload.width && resized_w <= upload.width
|
||
upload.create_thumbnail!(resized_w, resized_h, crop: crop)
|
||
end
|
||
end
|
||
|
||
return if upload.animated?
|
||
|
||
if img.ancestors('.onebox, .onebox-body, .quote').blank? && !img.classes.include?("onebox")
|
||
add_lightbox!(img, original_width, original_height, upload, cropped: crop)
|
||
end
|
||
|
||
optimize_image!(img, upload, cropped: crop)
|
||
end
|
||
end
|
||
|
||
def each_responsive_ratio
|
||
SiteSetting
|
||
.responsive_post_image_sizes
|
||
.split('|')
|
||
.map(&:to_f)
|
||
.sort
|
||
.each { |r| yield r if r > 1 }
|
||
end
|
||
|
||
def optimize_image!(img, upload, cropped: false)
|
||
w, h = img["width"].to_i, img["height"].to_i
|
||
|
||
# note: optimize_urls cooks the src further after this
|
||
thumbnail = upload.thumbnail(w, h)
|
||
if thumbnail && thumbnail.filesize.to_i < upload.filesize
|
||
img["src"] = thumbnail.url
|
||
|
||
srcset = +""
|
||
|
||
each_responsive_ratio do |ratio|
|
||
resized_w = (w * ratio).to_i
|
||
resized_h = (h * ratio).to_i
|
||
|
||
if !cropped && upload.width && resized_w > upload.width
|
||
cooked_url = UrlHelper.cook_url(upload.url, secure: @post.with_secure_uploads?)
|
||
srcset << ", #{cooked_url} #{ratio.to_s.sub(/\.0$/, "")}x"
|
||
elsif t = upload.thumbnail(resized_w, resized_h)
|
||
cooked_url = UrlHelper.cook_url(t.url, secure: @post.with_secure_uploads?)
|
||
srcset << ", #{cooked_url} #{ratio.to_s.sub(/\.0$/, "")}x"
|
||
end
|
||
|
||
img["srcset"] = "#{UrlHelper.cook_url(img["src"], secure: @post.with_secure_uploads?)}#{srcset}" if srcset.present?
|
||
end
|
||
else
|
||
img["src"] = upload.url
|
||
end
|
||
|
||
if !@disable_dominant_color && (color = upload.dominant_color(calculate_if_missing: true).presence)
|
||
img["data-dominant-color"] = color
|
||
end
|
||
end
|
||
|
||
def add_lightbox!(img, original_width, original_height, upload, cropped: false)
|
||
# first, create a div to hold our lightbox
|
||
lightbox = create_node("div", LIGHTBOX_WRAPPER_CSS_CLASS)
|
||
img.add_next_sibling(lightbox)
|
||
lightbox.add_child(img)
|
||
|
||
# then, the link to our larger image
|
||
src = UrlHelper.cook_url(img["src"], secure: @post.with_secure_uploads?)
|
||
a = create_link_node("lightbox", src)
|
||
img.add_next_sibling(a)
|
||
|
||
if upload
|
||
a["data-download-href"] = Discourse.store.download_url(upload)
|
||
end
|
||
|
||
a.add_child(img)
|
||
|
||
# then, some overlay informations
|
||
meta = create_node("div", "meta")
|
||
img.add_next_sibling(meta)
|
||
|
||
filename = get_filename(upload, img["src"])
|
||
informations = +"#{original_width}×#{original_height}"
|
||
informations << " #{upload.human_filesize}" if upload
|
||
|
||
a["title"] = CGI.escapeHTML(img["title"] || img["alt"] || filename)
|
||
|
||
meta.add_child create_icon_node("far-image")
|
||
meta.add_child create_span_node("filename", a["title"])
|
||
meta.add_child create_span_node("informations", informations)
|
||
meta.add_child create_icon_node("discourse-expand")
|
||
end
|
||
|
||
def get_filename(upload, src)
|
||
return File.basename(src) unless upload
|
||
return upload.original_filename unless upload.original_filename =~ /^blob(\.png)?$/i
|
||
I18n.t("upload.pasted_image_filename")
|
||
end
|
||
|
||
def update_post_image
|
||
upload = nil
|
||
images = extract_images_for_post
|
||
|
||
@post.each_upload_url(fragments: images.css("[data-thumbnail]")) do |src, path, sha1|
|
||
upload = Upload.find_by(sha1: sha1)
|
||
break if upload
|
||
end
|
||
|
||
if upload.nil? # No specified thumbnail. Use any image:
|
||
@post.each_upload_url(fragments: images.css(":not([data-thumbnail])")) do |src, path, sha1|
|
||
upload = Upload.find_by(sha1: sha1)
|
||
break if upload
|
||
end
|
||
end
|
||
|
||
if upload.present?
|
||
@post.update_column(:image_upload_id, upload.id) # post
|
||
if @post.is_first_post? # topic
|
||
@post.topic.update_column(:image_upload_id, upload.id)
|
||
extra_sizes = ThemeModifierHelper.new(theme_ids: Theme.user_selectable.pluck(:id)).topic_thumbnail_sizes
|
||
@post.topic.generate_thumbnails!(extra_sizes: extra_sizes)
|
||
end
|
||
else
|
||
@post.update_column(:image_upload_id, nil) if @post.image_upload_id
|
||
@post.topic.update_column(:image_upload_id, nil) if @post.topic.image_upload_id && @post.is_first_post?
|
||
nil
|
||
end
|
||
end
|
||
|
||
def optimize_urls
|
||
%w{href data-download-href}.each do |selector|
|
||
@doc.css("a[#{selector}]").each do |a|
|
||
a[selector] = UrlHelper.cook_url(a[selector].to_s)
|
||
end
|
||
end
|
||
|
||
%w{src}.each do |selector|
|
||
@doc.css("img[#{selector}]").each do |img|
|
||
custom_emoji = img["class"]&.include?("emoji-custom") && Emoji.custom?(img["title"])
|
||
img[selector] = UrlHelper.cook_url(
|
||
img[selector].to_s, secure: @post.with_secure_uploads? && !custom_emoji
|
||
)
|
||
end
|
||
end
|
||
end
|
||
|
||
def remove_user_ids
|
||
@doc.css("a[href]").each do |a|
|
||
uri = begin
|
||
URI(a["href"])
|
||
rescue URI::Error
|
||
next
|
||
end
|
||
next if uri.hostname != Discourse.current_hostname
|
||
|
||
query = Rack::Utils.parse_nested_query(uri.query)
|
||
next if !query.delete("u")
|
||
|
||
uri.query = query.map { |k, v| "#{k}=#{v}" }.join("&").presence
|
||
a["href"] = uri.to_s
|
||
end
|
||
end
|
||
|
||
def enforce_nofollow
|
||
add_nofollow = !@omit_nofollow && SiteSetting.add_rel_nofollow_to_user_content
|
||
PrettyText.add_rel_attributes_to_user_content(@doc, add_nofollow)
|
||
end
|
||
|
||
private
|
||
|
||
def post_process_images
|
||
extract_images.each do |img|
|
||
still_an_image = process_hotlinked_image(img)
|
||
convert_to_link!(img) if still_an_image
|
||
end
|
||
end
|
||
|
||
def process_hotlinked_image(img)
|
||
@hotlinked_map ||= @post.post_hotlinked_media.preload(:upload).map { |r| [r.url, r] }.to_h
|
||
normalized_src = PostHotlinkedMedia.normalize_src(img["src"] || img[PrettyText::BLOCKED_HOTLINKED_SRC_ATTR])
|
||
info = @hotlinked_map[normalized_src]
|
||
|
||
still_an_image = true
|
||
|
||
if info&.too_large?
|
||
if img.ancestors('.onebox, .onebox-body').blank?
|
||
add_large_image_placeholder!(img)
|
||
else
|
||
img.remove
|
||
end
|
||
|
||
still_an_image = false
|
||
elsif info&.download_failed?
|
||
if img.ancestors('.onebox, .onebox-body').blank?
|
||
add_broken_image_placeholder!(img)
|
||
else
|
||
img.remove
|
||
end
|
||
|
||
still_an_image = false
|
||
elsif info&.downloaded? && upload = info&.upload
|
||
img["src"] = UrlHelper.cook_url(upload.url, secure: @with_secure_uploads)
|
||
img.delete(PrettyText::BLOCKED_HOTLINKED_SRC_ATTR)
|
||
end
|
||
|
||
still_an_image
|
||
end
|
||
|
||
def add_blocked_hotlinked_media_placeholders
|
||
@doc.css([
|
||
"[#{PrettyText::BLOCKED_HOTLINKED_SRC_ATTR}]",
|
||
"[#{PrettyText::BLOCKED_HOTLINKED_SRCSET_ATTR}]",
|
||
].join(',')).each do |el|
|
||
src = el[PrettyText::BLOCKED_HOTLINKED_SRC_ATTR] ||
|
||
el[PrettyText::BLOCKED_HOTLINKED_SRCSET_ATTR]&.split(',')&.first&.split(' ')&.first
|
||
|
||
if el.name == "img"
|
||
add_blocked_hotlinked_image_placeholder!(el)
|
||
next
|
||
end
|
||
|
||
if ["video", "audio"].include?(el.parent.name)
|
||
el = el.parent
|
||
end
|
||
|
||
if el.parent.classes.include?("video-container")
|
||
el = el.parent
|
||
end
|
||
|
||
add_blocked_hotlinked_media_placeholder!(el, src)
|
||
end
|
||
end
|
||
|
||
def is_svg?(img)
|
||
path =
|
||
begin
|
||
URI(img["src"]).path
|
||
rescue URI::Error
|
||
nil
|
||
end
|
||
|
||
File.extname(path) == '.svg' if path
|
||
end
|
||
end
|