diff --git a/.rubocop.yml b/.rubocop.yml
index 932920c18..371b1967c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -119,7 +119,9 @@ Style/NumericPredicate:
 Style/PercentLiteralDelimiters:
   PreferredDelimiters:
     "default": "[]"
-    "%r": "!!"
+
+Style/ParallelAssignment:
+  Enabled: false
 
 Style/PerlBackrefs:
   Enabled: false
diff --git a/app/logical/sources/strategies.rb b/app/logical/sources/strategies.rb
index 0e2f2f82c..92232e59e 100644
--- a/app/logical/sources/strategies.rb
+++ b/app/logical/sources/strategies.rb
@@ -1,7 +1,7 @@
 module Sources
   module Strategies
     def self.all
-      return [
+      [
         Strategies::Pixiv,
         Strategies::NicoSeiga,
         Strategies::Twitter,
diff --git a/app/logical/sources/strategies/art_station.rb b/app/logical/sources/strategies/art_station.rb
index 2c78826fe..6ab7445ca 100644
--- a/app/logical/sources/strategies/art_station.rb
+++ b/app/logical/sources/strategies/art_station.rb
@@ -22,15 +22,15 @@
 
 module Sources::Strategies
   class ArtStation < Base
-    PROJECT1 = %r!\Ahttps?://www\.artstation\.com/artwork/(?<project_id>[a-z0-9-]+)/?\z!i
-    PROJECT2 = %r!\Ahttps?://(?<artist_name>[\w-]+)\.artstation\.com/projects/(?<project_id>[a-z0-9-]+)(?:/|\?[\w=-]+)?\z!i
+    PROJECT1 = %r{\Ahttps?://www\.artstation\.com/artwork/(?<project_id>[a-z0-9-]+)/?\z}i
+    PROJECT2 = %r{\Ahttps?://(?<artist_name>[\w-]+)\.artstation\.com/projects/(?<project_id>[a-z0-9-]+)(?:/|\?[\w=-]+)?\z}i
     PROJECT = Regexp.union(PROJECT1, PROJECT2)
     ARTIST1 = %r{\Ahttps?://(?<artist_name>[\w-]+)(?<!www)\.artstation\.com/?\z}i
     ARTIST2 = %r{\Ahttps?://www\.artstation\.com/artist/(?<artist_name>[\w-]+)/?\z}i
     ARTIST3 = %r{\Ahttps?://www\.artstation\.com/(?<artist_name>[\w-]+)/?\z}i
     ARTIST = Regexp.union(ARTIST1, ARTIST2, ARTIST3)
 
-    ASSET = %r!\Ahttps?://cdn\w*\.artstation\.com/p/assets/(?<type>images|covers)/images/(?<id>\d+/\d+/\d+)/(?<size>[^/]+)/(?<filename>.+)\z!i
+    ASSET = %r{\Ahttps?://cdn\w*\.artstation\.com/p/assets/(?<type>images|covers)/images/(?<id>\d+/\d+/\d+)/(?<size>[^/]+)/(?<filename>.+)\z}i
 
     attr_reader :json
 
@@ -144,7 +144,7 @@ module Sources::Strategies
 
       urls = image_url_sizes($~[:type], $~[:id], $~[:filename])
       if size == :smallest
-        urls = urls.reverse()
+        urls = urls.reverse
       end
 
       chosen_url = urls.find { |url| http_exists?(url, headers) }
diff --git a/app/logical/sources/strategies/base.rb b/app/logical/sources/strategies/base.rb
index 55bf676ff..0ee78f365 100644
--- a/app/logical/sources/strategies/base.rb
+++ b/app/logical/sources/strategies/base.rb
@@ -58,8 +58,8 @@ module Sources
       end
 
       def site_name
-        Addressable::URI.heuristic_parse(url).host
-      rescue Addressable::URI::InvalidURIError => e
+        Addressable::URI.heuristic_parse(url)&.host
+      rescue Addressable::URI::InvalidURIError
         nil
       end
 
@@ -90,9 +90,7 @@ module Sources
       # eventually be assigned as the source for the post, but it does not
       # represent what the downloader will fetch.
       def page_url
-        Rails.logger.warn "Valid page url for (#{url}, #{referer_url}) not found"
-
-        return nil
+        nil
       end
 
       # This will be the url stored in posts. Typically this is the page
@@ -141,7 +139,7 @@ module Sources
       # Subclasses should merge in any required headers needed to access resources
       # on the site.
       def headers
-        return Danbooru.config.http_headers
+        Danbooru.config.http_headers
       end
 
       # Returns the size of the image resource without actually downloading the file.
@@ -189,7 +187,7 @@ module Sources
       end
 
       def normalized_tags
-        tags.map { |tag, url| normalize_tag(tag) }.sort.uniq
+        tags.map { |tag, _url| normalize_tag(tag) }.sort.uniq
       end
 
       def normalize_tag(tag)
@@ -243,7 +241,7 @@ module Sources
       end
 
       def to_h
-        return {
+        {
           :artist => {
             :name => artist_name,
             :tag_name => tag_name,
diff --git a/app/logical/sources/strategies/deviant_art.rb b/app/logical/sources/strategies/deviant_art.rb
index 8bb193672..41c12382a 100644
--- a/app/logical/sources/strategies/deviant_art.rb
+++ b/app/logical/sources/strategies/deviant_art.rb
@@ -47,18 +47,18 @@
 module Sources
   module Strategies
     class DeviantArt < Base
-      ASSET_SUBDOMAINS = %r{(?:fc|th|pre|img|orig|origin-orig)\d*}i
+      ASSET_SUBDOMAINS = /(?:fc|th|pre|img|orig|origin-orig)\d*/i
       RESERVED_SUBDOMAINS = %r{\Ahttps?://(?:#{ASSET_SUBDOMAINS}|www)\.}i
       MAIN_DOMAIN = %r{\Ahttps?://(?:www\.)?deviantart.com}i
 
-      TITLE = %r{(?<title>[a-z0-9_-]+?)}i
-      ARTIST = %r{(?<artist>[a-z0-9_-]+?)}i
-      DEVIATION_ID = %r{(?<deviation_id>[0-9]+)}i
+      TITLE = /(?<title>[a-z0-9_-]+?)/i
+      ARTIST = /(?<artist>[a-z0-9_-]+?)/i
+      DEVIATION_ID = /(?<deviation_id>[0-9]+)/i
 
-      DA_FILENAME_1 = %r{[a-f0-9]{32}-d(?<base36_deviation_id>[a-z0-9]+)\.}i
-      DA_FILENAME_2 = %r{#{TITLE}(?:_by_#{ARTIST}(?:-d(?<base36_deviation_id>[a-z0-9]+))?)?\.}i
+      DA_FILENAME_1 = /[a-f0-9]{32}-d(?<base36_deviation_id>[a-z0-9]+)\./i
+      DA_FILENAME_2 = /#{TITLE}(?:_by_#{ARTIST}(?:-d(?<base36_deviation_id>[a-z0-9]+))?)?\./i
       DA_FILENAME = Regexp.union(DA_FILENAME_1, DA_FILENAME_2)
-      WIX_FILENAME  = %r{d(?<base36_deviation_id>[a-z0-9]+)[0-9a-f-]+\.\w+(?:/\w+/\w+/[\w,]+/(?<title>[\w-]+)_by_(?<artist>[\w-]+)_d\w+-\w+\.\w+)?.+}i
+      WIX_FILENAME = %r{d(?<base36_deviation_id>[a-z0-9]+)[0-9a-f-]+\.\w+(?:/\w+/\w+/[\w,]+/(?<title>[\w-]+)_by_(?<artist>[\w-]+)_d\w+-\w+\.\w+)?.+}i
 
       NOT_NORMALIZABLE_ASSET = %r{\Ahttps?://#{ASSET_SUBDOMAINS}\.deviantart\.net/.+/[0-9a-f]{32}(?:-[^d]\w+)?\.}i
 
@@ -75,7 +75,7 @@ module Sources
       PATH_PROFILE = %r{#{MAIN_DOMAIN}/#{ARTIST}/?\z}i
       SUBDOMAIN_PROFILE = %r{\Ahttps?://#{ARTIST}\.deviantart\.com/?\z}i
 
-      FAVME = %r{\Ahttps?://(www\.)?fav\.me/d(?<base36_deviation_id>[a-z0-9]+)\z}i
+      FAVME = %r{\Ahttps?://(?:www\.)?fav\.me/d(?<base36_deviation_id>[a-z0-9]+)\z}i
 
       def domains
         ["deviantart.net", "deviantart.com", "fav.me"]
@@ -110,12 +110,12 @@ module Sources
           api_deviation[:videos].max_by { |x| x[:filesize] }[:src]
         else
           src = api_deviation.dig(:content, :src)
-          if deviation_id && deviation_id.to_i <= 790677560 && src =~ /^https:\/\/images-wixmp-/ && src !~ /\.gif\?/
-            src = src.sub(%r!(/f/[a-f0-9-]+/[a-f0-9-]+)!, '/intermediary\1')
-            src = src.sub(%r!/v1/(fit|fill)/.*\z!i, "")
+          if deviation_id && deviation_id.to_i <= 790_677_560 && src =~ %r{\Ahttps://images-wixmp-} && src !~ /\.gif\?/
+            src = src.sub(%r{(/f/[a-f0-9-]+/[a-f0-9-]+)}, '/intermediary\1')
+            src = src.sub(%r{/v1/(fit|fill)/.*\z}i, "")
           end
-          src = src.sub(%r!\Ahttps?://orig\d+\.deviantart\.net!i, "http://origin-orig.deviantart.net")
-          src = src.gsub(%r!q_\d+,strp!, "q_100")
+          src = src.sub(%r{\Ahttps?://orig\d+\.deviantart\.net}i, "http://origin-orig.deviantart.net")
+          src = src.gsub(/q_\d+,strp/, "q_100")
           src
         end
       end
@@ -191,7 +191,7 @@ module Sources
 
             # <a href="https://sa-dui.deviantart.com/journal/About-Commissions-223178193" data-sigil="thumb" class="thumb lit" ...>
             if element["class"].split.include?("lit")
-              deviation_id = element["href"][%r!-(\d+)\z!, 1].to_i
+              deviation_id = element["href"][/-(\d+)\z/, 1].to_i
               element.content = "deviantart ##{deviation_id}"
             else
               element.content = ""
@@ -199,7 +199,7 @@ module Sources
           end
 
           if element.name == "a" && element["href"].present?
-            element["href"] = element["href"].gsub(%r!\Ahttps?://www\.deviantart\.com/users/outgoing\?!i, "")
+            element["href"] = element["href"].gsub(%r{\Ahttps?://www\.deviantart\.com/users/outgoing\?}i, "")
 
             # href may be missing the `http://` bit (ex: `inprnt.com`, `//inprnt.com`). Add it if missing.
             uri = Addressable::URI.heuristic_parse(element["href"]) rescue nil
@@ -283,7 +283,7 @@ module Sources
         return nil if meta.nil?
 
         appurl = meta["content"]
-        uuid = appurl[%r!\ADeviantArt://deviation/(.*)\z!, 1]
+        uuid = appurl[%r{\ADeviantArt://deviation/(.*)\z}, 1]
         uuid
       end
       memoize :uuid
diff --git a/app/logical/sources/strategies/hentai_foundry.rb b/app/logical/sources/strategies/hentai_foundry.rb
index 5ab3ca2ed..74f570288 100644
--- a/app/logical/sources/strategies/hentai_foundry.rb
+++ b/app/logical/sources/strategies/hentai_foundry.rb
@@ -23,11 +23,11 @@
 module Sources
   module Strategies
     class HentaiFoundry < Base
-      BASE_URL =    %r!\Ahttps?://(?:www\.)?hentai-foundry\.com!i
-      PAGE_URL =    %r!#{BASE_URL}/pictures/user/(?<artist_name>[\w-]+)/(?<illust_id>\d+)(?:/[\w.-]*)?(\?[\w=]*)?\z!i
-      OLD_PAGE =    %r!#{BASE_URL}/pic-(?<illust_id>\d+)(?:\.html)?\z!i
-      PROFILE_URL = %r!#{BASE_URL}/(?:pictures/)?user/(?<artist_name>[\w-]+)(?:/[a-z]*)?\z!i
-      IMAGE_URL =   %r!\Ahttps?://pictures\.hentai-foundry\.com/+\w/(?<artist_name>[\w-]+)/(?<illust_id>\d+)(?:(?:/[\w.-]+)?\.\w+)?\z!i
+      BASE_URL =    %r{\Ahttps?://(?:www\.)?hentai-foundry\.com}i
+      PAGE_URL =    %r{#{BASE_URL}/pictures/user/(?<artist_name>[\w-]+)/(?<illust_id>\d+)(?:/[\w.-]*)?(\?[\w=]*)?\z}i
+      OLD_PAGE =    %r{#{BASE_URL}/pic-(?<illust_id>\d+)(?:\.html)?\z}i
+      PROFILE_URL = %r{#{BASE_URL}/(?:pictures/)?user/(?<artist_name>[\w-]+)(?:/[a-z]*)?\z}i
+      IMAGE_URL =   %r{\Ahttps?://pictures\.hentai-foundry\.com/+\w/(?<artist_name>[\w-]+)/(?<illust_id>\d+)(?:(?:/[\w.-]+)?\.\w+)?\z}i
 
       def domains
         ["hentai-foundry.com"]
diff --git a/app/logical/sources/strategies/moebooru.rb b/app/logical/sources/strategies/moebooru.rb
index af149682e..9c4cc1f8d 100644
--- a/app/logical/sources/strategies/moebooru.rb
+++ b/app/logical/sources/strategies/moebooru.rb
@@ -32,10 +32,10 @@
 module Sources
   module Strategies
     class Moebooru < Base
-      BASE_URL = %r!\Ahttps?://(?:[^.]+\.)?(?<domain>yande\.re|konachan\.com)!i
-      POST_URL = %r!#{BASE_URL}/post/show/(?<id>\d+)!i
-      URL_SLUG = %r!/(?:yande\.re%20|Konachan\.com%20-%20)?(?<id>\d+)?.*!i
-      IMAGE_URL = %r!#{BASE_URL}/(?<type>image|jpeg|sample)/(?<md5>\h{32})#{URL_SLUG}?\.(?<ext>jpg|jpeg|png|gif)\z!i
+      BASE_URL = %r{\Ahttps?://(?:[^.]+\.)?(?<domain>yande\.re|konachan\.com)}i
+      POST_URL = %r{#{BASE_URL}/post/show/(?<id>\d+)}i
+      URL_SLUG = %r{/(?:yande\.re%20|Konachan\.com%20-%20)?(?<id>\d+)?.*}i
+      IMAGE_URL = %r{#{BASE_URL}/(?<type>image|jpeg|sample)/(?<md5>\h{32})#{URL_SLUG}?\.(?<ext>jpg|jpeg|png|gif)\z}i
 
       delegate :artist_name, :profile_url, :tag_name, :artist_commentary_title, :artist_commentary_desc, :dtext_artist_commentary_title, :dtext_artist_commentary_desc, to: :sub_strategy, allow_nil: true
 
@@ -63,7 +63,7 @@ module Sources
       end
 
       def preview_urls
-        return image_urls unless post_md5.present?
+        return image_urls if post_md5.blank?
         ["https://#{file_host}/data/preview/#{post_md5[0..1]}/#{post_md5[2..3]}/#{post_md5}.jpg"]
       end
 
diff --git a/app/logical/sources/strategies/nico_seiga.rb b/app/logical/sources/strategies/nico_seiga.rb
index e63094bb9..ee4efd3d5 100644
--- a/app/logical/sources/strategies/nico_seiga.rb
+++ b/app/logical/sources/strategies/nico_seiga.rb
@@ -38,7 +38,7 @@
 module Sources
   module Strategies
     class NicoSeiga < Base
-      DIRECT       = %r{\Ahttps?://lohas\.nicoseiga\.jp/(priv|o)/(?:\w+/\d+/)?(?<image_id>\d+)(?:\?.+)?}i
+      DIRECT       = %r{\Ahttps?://lohas\.nicoseiga\.jp/(?:priv|o)/(?:\w+/\d+/)?(?<image_id>\d+)(?:\?.+)?}i
       CDN_DIRECT   = %r{\Ahttps?://dcdn\.cdn\.nimg\.jp/.+/\w+/\d+/(?<image_id>\d+)}i
       SOURCE       = %r{\Ahttps?://seiga\.nicovideo\.jp/image/source(?:/|\?id=)(?<image_id>\d+)}i
 
diff --git a/app/logical/sources/strategies/nijie.rb b/app/logical/sources/strategies/nijie.rb
index e41d47f3d..b24605168 100644
--- a/app/logical/sources/strategies/nijie.rb
+++ b/app/logical/sources/strategies/nijie.rb
@@ -44,25 +44,25 @@
 module Sources
   module Strategies
     class Nijie < Base
-      BASE_URL = %r!\Ahttps?://(?:[^.]+\.)?nijie\.info!i
-      PAGE_URL = %r!#{BASE_URL}/view(?:_popup)?\.php\?id=(?<illust_id>\d+)!i
-      PROFILE_URL = %r!#{BASE_URL}/members(?:_illust)?\.php\?id=(?<artist_id>\d+)\z!i
+      BASE_URL = %r{\Ahttps?://(?:[^.]+\.)?nijie\.info}i
+      PAGE_URL = %r{#{BASE_URL}/view(?:_popup)?\.php\?id=(?<illust_id>\d+)}i
+      PROFILE_URL = %r{#{BASE_URL}/members(?:_illust)?\.php\?id=(?<artist_id>\d+)\z}i
 
       # https://pic03.nijie.info/nijie_picture/28310_20131101215959.jpg
       # https://pic03.nijie.info/nijie_picture/236014_20170620101426_0.png
       # http://pic.nijie.net/03/nijie_picture/829001_20190620004513_0.mp4
       # https://pic05.nijie.info/nijie_picture/diff/main/559053_20180604023346_1.png
-      FILENAME1 = %r!(?<artist_id>\d+)_(?<timestamp>\d{14})(?:_\d+)?!i
+      FILENAME1 = /(?<artist_id>\d+)_(?<timestamp>\d{14})(?:_\d+)?/i
 
       # https://pic01.nijie.info/nijie_picture/diff/main/218856_0_236014_20170620101329.png
-      FILENAME2 = %r!(?<illust_id>\d+)_\d+_(?<artist_id>\d+)_(?<timestamp>\d{14})!i
+      FILENAME2 = /(?<illust_id>\d+)_\d+_(?<artist_id>\d+)_(?<timestamp>\d{14})/i
 
       # https://pic04.nijie.info/nijie_picture/diff/main/287736_161475_20181112032855_1.png
-      FILENAME3 = %r!(?<illust_id>\d+)_(?<artist_id>\d+)_(?<timestamp>\d{14})_\d+!i
+      FILENAME3 = /(?<illust_id>\d+)_(?<artist_id>\d+)_(?<timestamp>\d{14})_\d+/i
 
-      IMAGE_BASE_URL = %r!\Ahttps?://(?:pic\d+\.nijie\.info|pic\.nijie\.net)!i
-      DIR = %r!(?:\d+/)?(?:__rs_\w+/)?nijie_picture(?:/diff/main)?!
-      IMAGE_URL = %r!#{IMAGE_BASE_URL}/#{DIR}/#{Regexp.union(FILENAME1, FILENAME2, FILENAME3)}\.\w+\z!i
+      IMAGE_BASE_URL = %r{\Ahttps?://(?:pic\d+\.nijie\.info|pic\.nijie\.net)}i
+      DIR = %r{(?:\d+/)?(?:__rs_\w+/)?nijie_picture(?:/diff/main)?}
+      IMAGE_URL = %r{#{IMAGE_BASE_URL}/#{DIR}/#{Regexp.union(FILENAME1, FILENAME2, FILENAME3)}\.\w+\z}i
 
       def domains
         ["nijie.info", "nijie.net"]
@@ -146,7 +146,7 @@ module Sources
       end
 
       def to_full_image_url(x)
-        x.gsub(%r!__rs_\w+/!i, "").gsub(/\Ahttp:/, "https:")
+        x.gsub(%r{__rs_\w+/}i, "").gsub(/\Ahttp:/, "https:")
       end
 
       def to_preview_url(url)
@@ -186,7 +186,7 @@ module Sources
           doc = agent.get(page_url)
         end
 
-        return doc
+        doc
       rescue Mechanize::ResponseCodeError => e
         return nil if e.response_code.to_i == 404
         raise
@@ -220,13 +220,10 @@ module Sources
         mech.cookie_jar.add(cookie)
 
         mech
-      rescue Mechanize::ResponseCodeError => x
-        if x.response_code.to_i == 429
-          sleep(5)
-          retry
-        else
-          raise
-        end
+      rescue Mechanize::ResponseCodeError => e
+        raise unless e.response_code.to_i == 429
+        sleep(5)
+        retry
       end
       memoize :agent
     end
diff --git a/app/logical/sources/strategies/null.rb b/app/logical/sources/strategies/null.rb
index e17c5e5c4..4ce04c30c 100644
--- a/app/logical/sources/strategies/null.rb
+++ b/app/logical/sources/strategies/null.rb
@@ -28,7 +28,7 @@ module Sources
         when %r{\Ahttp://p\.twpl\.jp/show/(?:large|orig)/([a-z0-9]+)}i
           "http://p.twipple.jp/#{$1}"
 
-        when %r{\Ahttps?://blog(?:(?:-imgs-)?\d*(?:-origin)?)?\.fc2\.com/(?:(?:[^/]/){3}|(?:[^/]/))([^/]+)/(?:file/)?([^\.]+\.[^\?]+)}i
+        when %r{\Ahttps?://blog(?:(?:-imgs-)?\d*(?:-origin)?)?\.fc2\.com/(?:(?:[^/]/){3}|(?:[^/]/))([^/]+)/(?:file/)?([^.]+\.[^?]+)}i
           username = $1
           filename = $2
           "http://#{username}.blog.fc2.com/img/#{filename}/"
@@ -105,7 +105,7 @@ module Sources
         # http://img.toranoana.jp/popup_img18/04/0010/22/87/040010228714-1p.jpg
         # http://img.toranoana.jp/popup_blimg/04/0030/08/30/040030083068-1p.jpg
         # https://ecdnimg.toranoana.jp/ec/img/04/0030/65/34/040030653417-6p.jpg
-        when %r{\Ahttps?://(\w+\.)?toranoana\.jp/(?:popup_(?:bl)?img\d*|ec/img)/\d{2}/\d{4}/\d{2}/\d{2}/(?<work_id>\d+)}i
+        when %r{\Ahttps?://(?:\w+\.)?toranoana\.jp/(?:popup_(?:bl)?img\d*|ec/img)/\d{2}/\d{4}/\d{2}/\d{2}/(?<work_id>\d+)}i
           "https://ec.toranoana.jp/tora_r/ec/item/#{$~[:work_id]}/"
 
         # https://a.hitomi.la/galleries/907838/1.png
diff --git a/app/logical/sources/strategies/pawoo.rb b/app/logical/sources/strategies/pawoo.rb
index 49a04b5ae..3af7ef8a7 100644
--- a/app/logical/sources/strategies/pawoo.rb
+++ b/app/logical/sources/strategies/pawoo.rb
@@ -16,13 +16,13 @@
 
 module Sources::Strategies
   class Pawoo < Base
-    HOST = %r!\Ahttps?://(www\.)?pawoo\.net!i
-    IMAGE = %r!\Ahttps?://img\.pawoo\.net/media_attachments/files/(\d+/\d+/\d+)!
-    NAMED_PROFILE = %r!#{HOST}/@(?<artist_name>\w+)!i
-    ID_PROFILE = %r!#{HOST}/web/accounts/(?<artist_id>\d+)!
+    HOST = %r{\Ahttps?://(www\.)?pawoo\.net}i
+    IMAGE = %r{\Ahttps?://img\.pawoo\.net/media_attachments/files/(\d+/\d+/\d+)}
+    NAMED_PROFILE = %r{#{HOST}/@(?<artist_name>\w+)}i
+    ID_PROFILE = %r{#{HOST}/web/accounts/(?<artist_id>\d+)}
 
-    STATUS1 = %r!\A#{HOST}/web/statuses/(?<status_id>\d+)!
-    STATUS2 = %r!\A#{NAMED_PROFILE}/(?<status_id>\d+)!
+    STATUS1 = %r{\A#{HOST}/web/statuses/(?<status_id>\d+)}
+    STATUS2 = %r{\A#{NAMED_PROFILE}/(?<status_id>\d+)}
 
     def domains
       ["pawoo.net"]
@@ -37,15 +37,13 @@ module Sources::Strategies
     end
 
     def image_urls
-      if url =~ %r!#{IMAGE}/small/([a-z0-9]+\.\w+)\z!i
-        return ["https://img.pawoo.net/media_attachments/files/#{$1}/original/#{$2}"]
+      if url =~ %r{#{IMAGE}/small/([a-z0-9]+\.\w+)\z}i
+        ["https://img.pawoo.net/media_attachments/files/#{$1}/original/#{$2}"]
+      elsif url =~ %r{#{IMAGE}/original/([a-z0-9]+\.\w+)\z}i
+        [url]
+      else
+        api_response.image_urls
       end
-
-      if url =~ %r!#{IMAGE}/original/([a-z0-9]+\.\w+)\z!i
-        return [url]
-      end
-
-      return api_response.image_urls
     end
 
     def page_url
@@ -55,16 +53,17 @@ module Sources::Strategies
         end
       end
 
-      return super
+      super
     end
 
     def profile_url
       if url =~ PawooApiClient::PROFILE2
-        return "https://pawoo.net/@#{$1}"
+        "https://pawoo.net/@#{$1}"
+      elsif api_response.profile_url.blank?
+        url
+      else
+        api_response.profile_url
       end
-
-      return url if api_response.profile_url.blank?
-      api_response.profile_url
     end
 
     def artist_name
@@ -87,10 +86,6 @@ module Sources::Strategies
       urls.map { |url| url[STATUS1, :status_id] || url[STATUS2, :status_id] }.compact.first
     end
 
-    def artist_commentary_title
-      nil
-    end
-
     def artist_commentary_desc
       api_response.commentary
     end
@@ -99,18 +94,10 @@ module Sources::Strategies
       api_response.tags
     end
 
-    def normalizable_for_artist_finder?
-      true
-    end
-
-    def normalize_for_artist_finder
-      profile_url
-    end
-
     def normalize_for_source
       artist_name = artist_name_from_url
       status_id = status_id_from_url
-      return unless status_id.present?
+      return if status_id.blank?
 
       if artist_name.present?
         "https://pawoo.net/@#{artist_name}/#{status_id}"
@@ -131,7 +118,7 @@ module Sources::Strategies
 
     def api_response
       [url, referer_url].each do |x|
-        if client = PawooApiClient.new.get(x)
+        if (client = PawooApiClient.new.get(x))
           return client
         end
       end
diff --git a/app/logical/sources/strategies/pixiv.rb b/app/logical/sources/strategies/pixiv.rb
index 5f2bbf669..ad7cd7eb1 100644
--- a/app/logical/sources/strategies/pixiv.rb
+++ b/app/logical/sources/strategies/pixiv.rb
@@ -50,35 +50,35 @@
 module Sources
   module Strategies
     class Pixiv < Base
-      MONIKER = %r!(?:[a-zA-Z0-9_-]+)!
-      PROFILE = %r!\Ahttps?://www\.pixiv\.net/member\.php\?id=[0-9]+\z!
-      DATE =    %r!(?<date>\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2})!i
-      EXT =     %r!(?:jpg|jpeg|png|gif)!i
+      MONIKER = /(?:[a-zA-Z0-9_-]+)/
+      PROFILE = %r{\Ahttps?://www\.pixiv\.net/member\.php\?id=[0-9]+\z}
+      DATE =    %r{(?<date>\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2})}i
+      EXT =     /(?:jpg|jpeg|png|gif)/i
 
-      WEB =     %r!(?:\A(?:https?://)?www\.pixiv\.net)!
-      I12 =     %r!(?:\A(?:https?://)?i[0-9]+\.pixiv\.net)!
-      IMG =     %r!(?:\A(?:https?://)?img[0-9]*\.pixiv\.net)!
-      PXIMG =   %r!(?:\A(?:https?://)?[^.]+\.pximg\.net)!
-      TOUCH =   %r!(?:\A(?:https?://)?touch\.pixiv\.net)!
-      UGOIRA =  %r!#{PXIMG}/img-zip-ugoira/img/#{DATE}/(?<illust_id>\d+)_ugoira1920x1080\.zip\z!i
-      ORIG_IMAGE = %r!#{PXIMG}/img-original/img/#{DATE}/(?<illust_id>\d+)_p(?<page>\d+)\.#{EXT}\z!i
-      STACC_PAGE = %r!\A#{WEB}/stacc/#{MONIKER}/?\z!i
-      NOVEL_PAGE = %r!(?:\Ahttps?://www\.pixiv\.net/novel/show\.php\?id=(\d+))!
-      FANBOX_ACCOUNT = %r!(?:\Ahttps?://www\.pixiv\.net/fanbox/creator/\d+\z)!
-      FANBOX_IMAGE = %r!(?:\Ahttps?://fanbox\.pixiv\.net/images/post/(\d+))!
-      FANBOX_PAGE = %r!(?:\Ahttps?://www\.pixiv\.net/fanbox/creator/\d+/post/(\d+))!
+      WEB =     %r{(?:\A(?:https?://)?www\.pixiv\.net)}
+      I12 =     %r{(?:\A(?:https?://)?i[0-9]+\.pixiv\.net)}
+      IMG =     %r{(?:\A(?:https?://)?img[0-9]*\.pixiv\.net)}
+      PXIMG =   %r{(?:\A(?:https?://)?[^.]+\.pximg\.net)}
+      TOUCH =   %r{(?:\A(?:https?://)?touch\.pixiv\.net)}
+      UGOIRA =  %r{#{PXIMG}/img-zip-ugoira/img/#{DATE}/(?<illust_id>\d+)_ugoira1920x1080\.zip\z}i
+      ORIG_IMAGE = %r{#{PXIMG}/img-original/img/#{DATE}/(?<illust_id>\d+)_p(?<page>\d+)\.#{EXT}\z}i
+      STACC_PAGE = %r{\A#{WEB}/stacc/#{MONIKER}/?\z}i
+      NOVEL_PAGE = %r{(?:\Ahttps?://www\.pixiv\.net/novel/show\.php\?id=(\d+))}
+      FANBOX_ACCOUNT = %r{(?:\Ahttps?://www\.pixiv\.net/fanbox/creator/\d+\z)}
+      FANBOX_IMAGE = %r{(?:\Ahttps?://fanbox\.pixiv\.net/images/post/(\d+))}
+      FANBOX_PAGE = %r{(?:\Ahttps?://www\.pixiv\.net/fanbox/creator/\d+/post/(\d+))}
 
       def self.to_dtext(text)
         if text.nil?
           return nil
         end
 
-        text = text.gsub(%r!https?://www\.pixiv\.net/member_illust\.php\?mode=medium&illust_id=([0-9]+)!i) do |match|
+        text = text.gsub(%r{https?://www\.pixiv\.net/member_illust\.php\?mode=medium&illust_id=([0-9]+)}i) do |_match|
           pixiv_id = $1
           %(pixiv ##{pixiv_id} "»":[/posts?tags=pixiv:#{pixiv_id}])
         end
 
-        text = text.gsub(%r!https?://www\.pixiv\.net/member\.php\?id=([0-9]+)!i) do |match|
+        text = text.gsub(%r{https?://www\.pixiv\.net/member\.php\?id=([0-9]+)}i) do |_match|
           member_id = $1
           profile_url = "https://www.pixiv.net/member.php?id=#{member_id}"
           search_params = {"search[url_matches]" => profile_url}.to_param
@@ -139,13 +139,13 @@ module Sources
           return "https://www.pixiv.net/artworks/#{illust_id}"
         end
 
-        return url
+        url
       rescue PixivApiClient::BadIDError
         nil
       end
 
       def canonical_url
-        return image_url
+        image_url
       end
 
       def profile_url
@@ -200,7 +200,7 @@ module Sources
           }
         end
 
-        return {
+        {
           "Referer" => "https://www.pixiv.net"
         }
       end
@@ -231,7 +231,7 @@ module Sources
         translated_tags = super(tag)
 
         if translated_tags.empty? && tag.include?("/")
-          translated_tags = tag.split("/").flat_map { |tag| super(tag) }
+          translated_tags = tag.split("/").flat_map { |translated_tag| super(translated_tag) }
         end
 
         translated_tags
@@ -257,7 +257,7 @@ module Sources
           return [ugoira_zip_url]
         end
 
-        return metadata.pages
+        metadata.pages
       end
 
       # in order to prevent recursive loops, this method should not make any
@@ -276,11 +276,11 @@ module Sources
             return url.query_values["illust_id"].to_i
 
           # http://www.pixiv.net/en/artworks/46324488
-          elsif url.host == "www.pixiv.net" && url.path =~ %r!\A/(?:en/)?artworks/(?<illust_id>\d+)!i
+          elsif url.host == "www.pixiv.net" && url.path =~ %r{\A/(?:en/)?artworks/(?<illust_id>\d+)}i
             return $~[:illust_id].to_i
 
           # http://www.pixiv.net/i/18557054
-          elsif url.host == "www.pixiv.net" && url.path =~ %r!\A/i/(?<illust_id>\d+)\z!i
+          elsif url.host == "www.pixiv.net" && url.path =~ %r{\A/i/(?<illust_id>\d+)\z}i
             return $~[:illust_id].to_i
 
           # http://img18.pixiv.net/img/evazion/14901720.png
@@ -289,8 +289,8 @@ module Sources
           # http://i2.pixiv.net/img18/img/evazion/14901720_s.png
           # http://i1.pixiv.net/img07/img/pasirism/18557054_p1.png
           # http://i1.pixiv.net/img07/img/pasirism/18557054_big_p1.png
-          elsif url.host =~ %r!\A(?:i\d+|img\d+)\.pixiv\.net\z!i &&
-                url.path =~ %r!\A(?:/img\d+)?/img/#{MONIKER}/(?<illust_id>\d+)(?:_\w+)?\.(?:jpg|jpeg|png|gif|zip)!i
+          elsif url.host =~ /\A(?:i\d+|img\d+)\.pixiv\.net\z/i &&
+              url.path =~ %r{\A(?:/img\d+)?/img/#{MONIKER}/(?<illust_id>\d+)(?:_\w+)?\.(?:jpg|jpeg|png|gif|zip)}i
             return $~[:illust_id].to_i
 
           # http://i1.pixiv.net/img-inf/img/2011/05/01/23/28/04/18557054_64x64.jpg
@@ -307,13 +307,13 @@ module Sources
           #
           # https://i.pximg.net/novel-cover-original/img/2019/01/14/01/15/05/10617324_d84daae89092d96bbe66efafec136e42.jpg
           # https://img-sketch.pixiv.net/uploads/medium/file/4463372/8906921629213362989.jpg
-          elsif url.host =~ %r!\A(?:[^.]+\.pximg\.net|i\d+\.pixiv\.net|tc-pximg01\.techorus-cdn\.com)\z!i &&
-                url.path =~ %r!\A(/c/\w+)?/img-[a-z-]+/img/#{DATE}/(?<illust_id>\d+)(?:_\w+)?\.(?:jpg|jpeg|png|gif|zip)!i
+          elsif url.host =~ /\A(?:[^.]+\.pximg\.net|i\d+\.pixiv\.net|tc-pximg01\.techorus-cdn\.com)\z/i &&
+              url.path =~ %r{\A(/c/\w+)?/img-[a-z-]+/img/#{DATE}/(?<illust_id>\d+)(?:_\w+)?\.(?:jpg|jpeg|png|gif|zip)}i
             return $~[:illust_id].to_i
           end
         end
 
-        return nil
+        nil
       end
       memoize :illust_id
 
@@ -324,7 +324,7 @@ module Sources
           end
         end
 
-        return nil
+        nil
       end
       memoize :novel_id
 
@@ -339,7 +339,7 @@ module Sources
           end
         end
 
-        return nil
+        nil
       end
       memoize :fanbox_id
 
@@ -350,7 +350,7 @@ module Sources
           end
         end
 
-        return nil
+        nil
       end
       memoize :fanbox_account_id
 
@@ -368,45 +368,39 @@ module Sources
           return PixivApiClient.new.fanbox(fanbox_id)
         end
 
-        return PixivApiClient.new.work(illust_id)
+        PixivApiClient.new.work(illust_id)
       end
       memoize :metadata
 
       def moniker
         # we can sometimes get the moniker from the url
-        if url =~ %r!#{IMG}/img/(#{MONIKER})!i
-          return $1
+        if url =~ %r{#{IMG}/img/(#{MONIKER})}i
+          $1
+        elsif url =~ %r{#{I12}/img[0-9]+/img/(#{MONIKER})}i
+          $1
+        elsif url =~ %r{#{WEB}/stacc/(#{MONIKER})/?$}i
+          $1
+        else
+          metadata.moniker
         end
-
-        if url =~ %r!#{I12}/img[0-9]+/img/(#{MONIKER})!i
-          return $1
-        end
-
-        if url =~ %r!#{WEB}/stacc/(#{MONIKER})/?$!i
-          return $1
-        end
-
-        return metadata.moniker
       rescue PixivApiClient::BadIDError
         nil
       end
       memoize :moniker
 
       def data
-        return {
-          ugoira_frame_data: ugoira_frame_data
-        }
+        { ugoira_frame_data: ugoira_frame_data }
       end
 
       def ugoira_zip_url
         if metadata.pages.is_a?(Hash) && metadata.pages["ugoira600x600"]
-          return metadata.pages["ugoira600x600"].sub("_ugoira600x600.zip", "_ugoira1920x1080.zip")
+          metadata.pages["ugoira600x600"].sub("_ugoira600x600.zip", "_ugoira1920x1080.zip")
         end
       end
       memoize :ugoira_zip_url
 
       def ugoira_frame_data
-        return metadata.json.dig("metadata", "frames")
+        metadata.json.dig("metadata", "frames")
       rescue PixivApiClient::BadIDError
         nil
       end
@@ -415,16 +409,14 @@ module Sources
       def ugoira_content_type
         case metadata.json["image_urls"].to_s
         when /\.jpg/
-          return "image/jpeg"
-
+          "image/jpeg"
         when /\.png/
-          return "image/png"
-
+          "image/png"
         when /\.gif/
-          return "image/gif"
+          "image/gif"
+        else
+          raise Sources::Error, "content type not found for (#{url}, #{referer_url})"
         end
-
-        raise Sources::Error.new("content type not found for (#{url}, #{referer_url})")
       end
       memoize :ugoira_content_type
 
@@ -434,7 +426,7 @@ module Sources
         # http://i2.pixiv.net/img04/img/syounen_no_uta/46170939_p0.jpg
         # http://i1.pixiv.net/c/600x600/img-master/img/2014/09/24/23/25/08/46168376_p0_master1200.jpg
         # http://i1.pixiv.net/img-original/img/2014/09/25/23/09/29/46183440_p0.jpg
-        if url =~ %r!/\d+_p(\d+)(?:_\w+)?\.#{EXT}!i
+        if url =~ %r{/\d+_p(\d+)(?:_\w+)?\.#{EXT}}i
           return $1.to_i
         end
 
@@ -445,7 +437,7 @@ module Sources
           end
         end
 
-        return nil
+        nil
       end
       memoize :manga_page
     end
diff --git a/app/logical/sources/strategies/tumblr.rb b/app/logical/sources/strategies/tumblr.rb
index c6d2fc5bc..6123f9f8b 100644
--- a/app/logical/sources/strategies/tumblr.rb
+++ b/app/logical/sources/strategies/tumblr.rb
@@ -12,19 +12,19 @@ module Sources::Strategies
   class Tumblr < Base
     SIZES = %w[1280 640 540 500h 500 400 250 100]
 
-    BASE_URL = %r!\Ahttps?://(?:[^/]+\.)*tumblr\.com!i
-    DOMAIN = %r{(data|(\d+\.)?media)\.tumblr\.com}
-    MD5 = %r{(?<md5>[0-9a-f]{32})}i
-    FILENAME = %r{(?<filename>(tumblr_(inline_)?)?[a-z0-9]+(_r[0-9]+)?)}i
-    EXT = %r{(?<ext>\w+)}
+    BASE_URL = %r{\Ahttps?://(?:[^/]+\.)*tumblr\.com}i
+    DOMAIN = /(data|(?:\d+\.)?media)\.tumblr\.com/i
+    MD5 = /(?<md5>[0-9a-f]{32})/i
+    FILENAME = /(?<filename>(?:tumblr_(?:inline_)?)?[a-z0-9]+(?:_r[0-9]+)?)/i
+    EXT = /(?<ext>\w+)/
 
     # old: https://66.media.tumblr.com/2c6f55531618b4335c67e29157f5c1fc/tumblr_pz4a44xdVj1ssucdno1_1280.png
     # new: https://66.media.tumblr.com/168dabd09d5ad69eb5fedcf94c45c31a/3dbfaec9b9e0c2e3-72/s640x960/bf33a1324f3f36d2dc64f011bfeab4867da62bc8.png
-    OLD_IMAGE = %r!\Ahttps?://#{DOMAIN}/(?<dir>#{MD5}/)?#{FILENAME}_(?<size>\w+)\.#{EXT}\z!i
+    OLD_IMAGE = %r{\Ahttps?://#{DOMAIN}/(?<dir>#{MD5}/)?#{FILENAME}_(?<size>\w+)\.#{EXT}\z}i
 
-    IMAGE = %r!\Ahttps?://#{DOMAIN}/!i
-    VIDEO = %r!\Ahttps?://(?:vtt|ve\.media)\.tumblr\.com/!i
-    POST = %r!\Ahttps?://(?<blog_name>[^.]+)\.tumblr\.com/(?:post|image)/(?<post_id>\d+)!i
+    IMAGE = %r{\Ahttps?://#{DOMAIN}/}i
+    VIDEO = %r{\Ahttps?://(?:vtt|ve\.media)\.tumblr\.com/}i
+    POST = %r{\Ahttps?://(?<blog_name>[^.]+)\.tumblr\.com/(?:post|image)/(?<post_id>\d+)}i
 
     def self.enabled?
       Danbooru.config.tumblr_consumer_key.present?
@@ -68,7 +68,7 @@ module Sources::Strategies
 
     def preview_urls
       image_urls.map do |x|
-        x.sub(%r!_1280\.(jpg|png|gif|jpeg)\z!, '_250.\1')
+        x.sub(/_1280\.(jpg|png|gif|jpeg)\z/, '_250.\1')
       end
     end
 
diff --git a/app/logical/sources/strategies/twitter.rb b/app/logical/sources/strategies/twitter.rb
index 69f363363..a51e162ea 100644
--- a/app/logical/sources/strategies/twitter.rb
+++ b/app/logical/sources/strategies/twitter.rb
@@ -1,20 +1,20 @@
 module Sources::Strategies
   class Twitter < Base
-    PAGE = %r!\Ahttps?://(?:mobile\.)?twitter\.com!i
-    PROFILE = %r!\Ahttps?://(?:mobile\.)?twitter.com/(?<username>[a-z0-9_]+)!i
+    PAGE = %r{\Ahttps?://(?:mobile\.)?twitter\.com}i
+    PROFILE = %r{\Ahttps?://(?:mobile\.)?twitter.com/(?<username>[a-z0-9_]+)}i
 
     # https://pbs.twimg.com/media/EBGbJe_U8AA4Ekb.jpg
     # https://pbs.twimg.com/media/EBGbJe_U8AA4Ekb?format=jpg&name=900x900
     # https://pbs.twimg.com/tweet_video_thumb/ETkN_L3X0AMy1aT.jpg
     # https://pbs.twimg.com/ext_tw_video_thumb/1243725361986375680/pu/img/JDA7g7lcw7wK-PIv.jpg
     # https://pbs.twimg.com/amplify_video_thumb/1215590775364259840/img/lolCkEEioFZTb5dl.jpg
-    BASE_IMAGE_URL = %r!\Ahttps?://pbs\.twimg\.com/(?<media_type>media|tweet_video_thumb|ext_tw_video_thumb|amplify_video_thumb)!i
-    FILENAME1 = %r!(?<file_name>[a-zA-Z0-9_-]+)\.(?<file_ext>\w+)!i
-    FILENAME2 = %r!(?<file_name>[a-zA-Z0-9_-]+)\?.*format=(?<file_ext>\w+)!i
-    FILEPATH1 = %r!(?<file_path>\d+/[\w_-]+/img)!i
-    FILEPATH2 = %r!(?<file_path>\d+/img)!i
-    IMAGE_URL1 = %r!#{BASE_IMAGE_URL}/#{Regexp.union(FILENAME1, FILENAME2)}!i
-    IMAGE_URL2 = %r!#{BASE_IMAGE_URL}/#{Regexp.union(FILEPATH1, FILEPATH2)}/#{FILENAME1}!i
+    BASE_IMAGE_URL = %r{\Ahttps?://pbs\.twimg\.com/(?<media_type>media|tweet_video_thumb|ext_tw_video_thumb|amplify_video_thumb)}i
+    FILENAME1 = /(?<file_name>[a-zA-Z0-9_-]+)\.(?<file_ext>\w+)/i
+    FILENAME2 = /(?<file_name>[a-zA-Z0-9_-]+)\?.*format=(?<file_ext>\w+)/i
+    FILEPATH1 = %r{(?<file_path>\d+/[\w_-]+/img)}i
+    FILEPATH2 = %r{(?<file_path>\d+/img)}i
+    IMAGE_URL1 = %r{#{BASE_IMAGE_URL}/#{Regexp.union(FILENAME1, FILENAME2)}}i
+    IMAGE_URL2 = %r{#{BASE_IMAGE_URL}/#{Regexp.union(FILEPATH1, FILEPATH2)}/#{FILENAME1}}i
 
     # Twitter provides a list but it's inaccurate; some names ('intent') aren't
     # included and other names in the list aren't actually reserved.
@@ -47,7 +47,7 @@ module Sources::Strategies
         return $1
       end
 
-      return nil
+      nil
     end
 
     def self.artist_name_from_url(url)
@@ -78,7 +78,7 @@ module Sources::Strategies
           elsif media[:type].in?(["video", "animated_gif"])
             variants = media.dig(:video_info, :variants)
             videos = variants.select { |variant| variant[:content_type] == "video/mp4" }
-            video = videos.max_by { |video| video[:bitrate].to_i }
+            video = videos.max_by { |v| v[:bitrate].to_i }
             video[:url]
           end
         end
@@ -137,10 +137,6 @@ module Sources::Strategies
       api_response[:full_text].to_s
     end
 
-    def normalizable_for_artist_finder?
-      url =~ PAGE
-    end
-
     def normalize_for_artist_finder
       profile_url.try(:downcase).presence || url
     end
@@ -193,9 +189,9 @@ module Sources::Strategies
 
       desc = artist_commentary_desc.unicode_normalize(:nfkc)
       desc = CGI.unescapeHTML(desc)
-      desc = desc.gsub(%r!https?://t\.co/[a-zA-Z0-9]+!i, url_replacements)
-      desc = desc.gsub(%r!#([^[:space:]]+)!, '"#\\1":[https://twitter.com/hashtag/\\1]')
-      desc = desc.gsub(%r!@([a-zA-Z0-9_]+)!, '"@\\1":[https://twitter.com/\\1]')
+      desc = desc.gsub(%r{https?://t\.co/[a-zA-Z0-9]+}i, url_replacements)
+      desc = desc.gsub(/#([^[:space:]]+)/, '"#\\1":[https://twitter.com/hashtag/\\1]')
+      desc = desc.gsub(/@([a-zA-Z0-9_]+)/, '"@\\1":[https://twitter.com/\\1]')
       desc.strip
     end
 
@@ -204,7 +200,7 @@ module Sources::Strategies
     end
 
     def api_response
-      return {} if !self.class.enabled?
+      return {} unless self.class.enabled?
       api_client.status(status_id)
     end
 
diff --git a/app/logical/sources/strategies/weibo.rb b/app/logical/sources/strategies/weibo.rb
index 8cad13cd1..eaac6e40f 100644
--- a/app/logical/sources/strategies/weibo.rb
+++ b/app/logical/sources/strategies/weibo.rb
@@ -38,7 +38,7 @@ module Sources
 
       PAGE_URL_1    = %r{\Ahttps?://(?:www\.)?weibo\.com/(?<artist_short_id>\d+)/(?<illust_base62_id>\w+)(?:\?.*)?\z}i
       PAGE_URL_2    = %r{#{PROFILE_URL_2}/(?:wbphotos/large/mid|talbum/detail/photo_id)/(?<illust_long_id>\d+)(?:/pid/(?<image_id>\w{32}))?}i
-      PAGE_URL_3    = %r{\Ahttps?://m\.weibo\.cn/(detail/(?<illust_long_id>\d+)|status/(?<illust_base62_id>\w+))}i
+      PAGE_URL_3    = %r{\Ahttps?://m\.weibo\.cn/(?:detail/(?<illust_long_id>\d+)|status/(?<illust_base62_id>\w+))}i
       PAGE_URL_4    = %r{\Ahttps?://tw\.weibo\.com/(?:(?<artist_short_id>\d+)|\w+)/(?<illust_long_id>\d+)}i
 
       IMAGE_URL     = %r{\Ahttps?://\w{3}\.sinaimg\.cn/\w+/(?<image_id>\w{32})\.}i
@@ -203,12 +203,12 @@ module Sources
       end
 
       def api_response
-        return nil if mobile_url.blank?
+        return {} if mobile_url.blank?
 
         resp = Danbooru::Http.cache(1.minute).get(mobile_url)
         json_string = resp.to_s[/var \$render_data = \[(.*)\]\[0\]/m, 1]
 
-        return nil if json_string.blank?
+        return {} if json_string.blank?
 
         JSON.parse(json_string)["status"]
       end