Fix cross-host write error and closing "}" truncation bug.

lib/tasks/change_site_server_name.rake

@@ -33,24 +33,36 @@ namespace :create_site do
     nginx_file_content = site_construct.generate_nginx_text(raw_content)
     auto_update_infos("Writing via safe stream...")
     ssh.open_channel do |channel|
-      channel.exec("sudo -S sh -c 'cat > #{site_construct.nginx_file}'") do |ch, success|  
+      channel.exec("sudo -S sh -c 'cat > #{site_construct.nginx_file}'") do |ch, success|
+      content_sent = false
+      send_content_once = lambda do
+        unless content_sent
+          content_sent = true
+          ch.send_data(nginx_file_content)
+          ch.eof!
+        end
+      end
       ch.on_extended_data do |c, type, data|
         if data =~ /password/i
           c.send_data("#{@password}\n")
         end
+        send_content_once.call
       end
-      ch.send_data(nginx_file_content)    
+      Thread.new {
-        ch.eof! 
+        sleep 2
+        send_content_once.call
+      }
       end
     end
     ssh.loop
     exec_ssh_command_by_sudo(ssh, "service nginx restart")
     auto_update_infos("Finish!")
-  end 
+  end
 
   def exec_command_by_user(session,command)
     output = session.exec!(command)
-    return output[0...-1].gsub(/^\n[\n]+/,'')
+    output = output[0...-1] if output.end_with?("\n")
+    return output.gsub(/^\n[\n]+/,'')
   end
   def exec_ssh_command_by_sudo(session,command)
     output = session.exec!("echo '#{@password}' | sudo -S #{command}")