Paypal IPN

网上已经有很多paypay ipn的文章了，只不过他们都是用paypal的购物车。因为我只是用来作为一个付款渠道，因此，我得先生成订单，然后引导客户去paypal付款。

1.转去付款页面

    <form id="payForm" method="post" action="<%Response.Write(URL);%>">
        <input type="hidden" name="cmd" value="<%Response.Write(cmd);%>" />
        <input type="hidden" name="business" value="<%Response.Write(business);%>" />
        <input type="hidden" name="item_name" value="<%Response.Write(item_name);%>" /> 
        <input type="hidden" name="amount" value="<%Response.Write(amount);%>" />
        <input type="hidden" name="no_shipping" value="<%Response.Write(no_shipping);%>" />
        <input type="hidden" name="return" value="<%Response.Write(return_url);%>" />
        <input type="hidden" name="rm" value="<%Response.Write(rm);%>" />
        <input type="hidden" name="notify_url" value="<%Response.Write(notify_url);%>" />
        <input type="hidden" name="cancel_return" value="<%Response.Write(cancel_url);%>" />
        <input type="hidden" name="currency_code" value="<%Response.Write(currency_code);%>" />
        <input type="hidden" name="custom" value="<%Response.Write(request_id);%>" />
    </form>

    <script  type="text/javascript" language="javascript">
    document.forms["payForm"].submit();
    </script>