diff --git a/app/api/mobile/apis/memos.rb b/app/api/mobile/apis/memos.rb
index 04191f53..22382a51 100644
--- a/app/api/mobile/apis/memos.rb
+++ b/app/api/mobile/apis/memos.rb
@@ -31,10 +31,10 @@ module Mobile
         get ':id' do
           # 记录用户流量源
           if params[:edu]
-            ip = request.host
+            ip = @env['REMOTE_HOST']
             ua = UserAgent.find_by_ip(ip)
             unless ua
-              UserAgent.create(:key => params[:edu].strip, :ip => request.host)
+              UserAgent.create(:key => params[:edu].strip, :ip => ip)
             end
           end
           MemosService.new.show params, current_user