implement xml response for legacy post create action

app/controllers/legacy_controller.rb

@@ -9,7 +9,6 @@ class LegacyController < ApplicationController
   def create_post
     @upload = Upload.create(params[:post].merge(:server => Socket.gethostname))
     @upload.delay.process!
-    render :nothing => true
   end
   
   def users

app/views/legacy/create_post.xml.erb

@@ -0,0 +1,4 @@
+<response>
+  <post_id>0</post_id>
+  <location>http://<%= Danbooru.config.hostname %>/uploads/<%= @upload.id %></location>
+</response>

config/routes.rb

@@ -223,7 +223,7 @@ Danbooru::Application.routes.draw do
   
   match "/post/index.xml", :controller => "legacy", :action => "posts", :format => "xml"
   match "/post/index.json", :controller => "legacy", :action => "posts", :format => "json"
-  match "/post/create.xml", :controller => "legacy", :action => "create_post"
+  match "/post/create.xml", :controller => "legacy", :action => "create_post", :format => "xml"
   match "/post/piclens", :controller => "legacy", :action => "unavailable"
   match "/post/index" => redirect {|params, req| "/posts?tags=#{CGI::escape(req.params[:tags].to_s)}&page=#{req.params[:page]}"}
   match "/post" => redirect {|params, req| "/posts?tags=#{CGI::escape(req.params[:tags].to_s)}&page=#{req.params[:page]}"}