web service - communicate with a website without PI

hi all,

My requirement is as follow:

Function module web service sending data to a website (data --> URL with parameters i.e. customer, amount to pay). On Website Customer fills the form and submits. The result is Success or Fail hence there is a delay involved in processing the form. The result is sent back to SAP through web service response parameters.

My question is :

1. In my Function module web service how can I introduce the delay aspect from Website. Will the web service keep on waiting for the response or the focus is lost (with Blank Response parameters) if Instant response does not come.

2. Can it send the data directly to the Website for processing or there is some middleware required from SAP or non-SAP side. Same question for response.

Thanks for assistance.

FS