fixes to iqdb queries

app/controllers/iqdb_queries_controller.rb

@@ -3,14 +3,18 @@ class IqdbQueriesController < ApplicationController
 
   def show
     if params[:url]
-      url = URI::HTTP.build(host: Danbooru.config.iqdbs_server, path: "/similar", query: URI.encode_www_form({callback: iqdb_queries_url, url: params[:url]}))
+      url = URI.parse(Danbooru.config.iqdbs_server)
+      url.path = "/similar"
+      url.query = {callback: iqdb_queries_url, url: params[:url]}.to_query
       redirect_to url.to_s
       return
     end
 
     if params[:post_id]
       post = Post.find(params[:post_id])
-      url = URI::HTTP.build(host: Danbooru.config.iqdbs_server, path: "/similar", query: URI.encode_www_form({callback: iqdb_queries_url, url: post.preview_file_url}))
+      url = URI.parse(Danbooru.config.iqdbs_server)
+      url.path = "/similar"
+      url.query = {callback: iqdb_queries_url, url: post.preview_file_url}.to_query
       redirect_to url.to_s
       return      
     end

config/routes.rb

@@ -154,7 +154,11 @@ Rails.application.routes.draw do
     resource :visit, :controller => "forum_topic_visits"
   end
   resources :ip_bans
-  resource :iqdb_queries, :only => [:show]
+  resource :iqdb_queries, :only => [:show]  do
+    collection do
+      get :check, to: redirect {|path_params, req| "/iqdb_queries?#{req.query_string}"}
+    end
+  end
   resources :janitor_trials do
     collection do
       get :test