fixes #3560

app/logical/remote_file_manager.rb

@@ -7,6 +7,24 @@ class RemoteFileManager
     @path = path
   end
 
+  def distribute_to_archive(dest_url)
+    uri = URI.parse(dest_url)
+    dir_name = uri.host.split(".").first
+    uuid = SecureRandom.uuid
+    dest_path = "/var/www/#{dir_name}#{uri.path}"
+    temp_path = "/tmp/rfm-#{Danbooru.config.server_host}-#{uuid}"
+    
+    Net::SFTP.start(uri.host, Danbooru.config.archive_server_login) do |ftp|
+      ftp.upload!(path, temp_path)
+      begin
+        ftp.rename!(temp_path, dest_path)
+      rescue Net::SFTP::StatusException
+        ftp.remove!(dest_path)
+        ftp.rename!(temp_apth, dest_path)
+      end
+    end
+  end
+
   def distribute
     uuid = SecureRandom.uuid
     temp_path = "/tmp/rfm-#{Danbooru.config.server_host}-#{uuid}"

app/models/post.rb

@@ -107,9 +107,16 @@ class Post < ApplicationRecord
     end
 
     def distribute_files
-      RemoteFileManager.new(file_path).distribute
-      RemoteFileManager.new(preview_file_path).distribute if has_preview?
-      RemoteFileManager.new(large_file_path).distribute if has_large?
+      if Danbooru.config.build_file_url(self) =~ /^http/
+        # this post is archived
+        RemoteFileManager.new(file_path).distribute_to_archive(Danbooru.config.build_file_url(self))
+        RemoteFileManager.new(preview_file_path).distribute if has_preview?
+        RemoteFileManager.new(large_file_path).distribute_to_archive(Danbooru.config.build_large_file_url(self)) if has_large?
+      else
+        RemoteFileManager.new(file_path).distribute
+        RemoteFileManager.new(preview_file_path).distribute if has_preview?
+        RemoteFileManager.new(large_file_path).distribute if has_large?
+      end
     end
 
     def file_path_prefix

config/danbooru_default_config.rb

@@ -217,6 +217,10 @@ module Danbooru
       "albert"
     end
 
+    def archive_server_login
+      "danbooru"
+    end
+
     def build_file_url(post)
       "/data/#{post.file_path_prefix}/#{post.md5}.#{post.file_ext}"
     end