Rescue exceptions caused by FetchLinkCardService (#4045)

app/models/concerns/remotable.rb

@@ -10,7 +10,11 @@ module Remotable
       method_name = "#{attribute_name}=".to_sym
 
       define_method method_name do |url|
+        begin
           parsed_url = Addressable::URI.parse(url).normalize
+        rescue Addressable::URI::InvalidURIError
+          return
+        end
 
         return if !%w(http https).include?(parsed_url.scheme) || parsed_url.host.empty? || self[attribute_name] == url
 
@@ -26,7 +30,7 @@ module Remotable
           send("#{attachment_name}_file_name=", filename)
 
           self[attribute_name] = url if has_attribute?(attribute_name)
-        rescue HTTP::TimeoutError, OpenSSL::SSL::SSLError, Paperclip::Errors::NotIdentifiedByImageMagickError, Addressable::URI::InvalidURIError => e
+        rescue HTTP::TimeoutError, HTTP::ConnectionError, OpenSSL::SSL::SSLError, Paperclip::Errors::NotIdentifiedByImageMagickError, Addressable::URI::InvalidURIError => e
           Rails.logger.debug "Error fetching remote #{attachment_name}: #{e}"
           nil
         end

app/services/fetch_link_card_service.rb

@@ -18,6 +18,8 @@ class FetchLinkCardService < BaseService
     return if res.code != 200 || res.mime_type != 'text/html'
 
     attempt_opengraph(card, url) unless attempt_oembed(card, url)
+  rescue HTTP::ConnectionError, OpenSSL::SSL::SSLError
+    nil
   end
 
   private