Classic ASP
PayPal - Refund Sale

Refunds a completed payment. Provide the sale_id in the URI and an empty JSON payload for a full refund. For partial refunds, you can include an amount.
Note: This example requires Chilkat v9.5.0.65 or greater.
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Classic ASP
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

'  Note: Requires Chilkat v9.5.0.64 or greater.

'  This requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  Load our previously obtained access token. (see PayPal OAuth2 Access Token)
set jsonToken = Server.CreateObject("Chilkat.JsonObject")
success = jsonToken.LoadFile("qa_data/tokens/paypal.json")

'  Build the Authorization request header field value.
set sbAuth = Server.CreateObject("Chilkat.StringBuilder")
'  token_type should be "Bearer"
success = sbAuth.Append(jsonToken.StringOf("token_type"))
success = sbAuth.Append(" ")
success = sbAuth.Append(jsonToken.StringOf("access_token"))

'  Make the initial connection.
'  A single REST object, once connected, can be used for many PayPal REST API calls.
'  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
'  then it will be automatically re-established as needed.
set rest = Server.CreateObject("Chilkat.Rest")
bAutoReconnect = 1
success = rest.Connect("api.sandbox.paypal.com",443,1,bAutoReconnect)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( rest.LastErrorText) & "</pre>"
    Response.End
End If

'  ----------------------------------------------------------------------------------------------
'  The code above this comment could be placed inside a function/subroutine within the application
'  because the connection does not need to be made for every request.  Once the connection is made
'  the app may send many requests..
'  ----------------------------------------------------------------------------------------------

'  To refund a particular amount, build JSON such as this:
set jsonPartial = Server.CreateObject("Chilkat.JsonObject")
jsonPartial.EmitCompact = 0
success = jsonPartial.UpdateString("amount.total","2.34")
success = jsonPartial.UpdateString("amount.currency","USD")
'  invoice_number is optional..
success = jsonPartial.UpdateString("invoice_number","INV-1234567")
Response.Write "<pre>" & Server.HTMLEncode( jsonPartial.Emit()) & "</pre>"

'  The JSON for a partial refund:

'  	{ 
'  	  "amount": { 
'  	    "total": "2.34",
'  	    "currency": "USD"
'  	  },
'  	  "invoice_number": "INV-1234567"
'  	}

success = rest.AddHeader("Authorization",sbAuth.GetAsString())
success = rest.AddHeader("Content-Type","application/json")

'  The sale ID is added to the path.
'  The sale ID is obtained from payment records as shown here: Find Completed Sales
set sbPath = Server.CreateObject("Chilkat.StringBuilder")
success = sbPath.Append("/v1/payments/sale/sale_id/refund")
numReplaced = sbPath.Replace("sale_id","1XC17935MN507400J")

'  Send the POST request containign the JSON in the request body, and get the JSON response.
set sbJsonRequest = Server.CreateObject("Chilkat.StringBuilder")
jsonPartial.EmitCompact = 1
success = jsonPartial.EmitSb(sbJsonRequest)
set sbJsonResponse = Server.CreateObject("Chilkat.StringBuilder")

bFullRefund = 1
'  To send a full refund, send an empty request body:
If (bFullRefund = 1) Then
    sbJsonRequest.Clear 
    success = sbJsonRequest.Append("{}")
End If

success = rest.FullRequestSb("POST",sbPath.GetAsString(),sbJsonRequest,sbJsonResponse)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( rest.LastErrorText) & "</pre>"
    Response.End
End If

set json = Server.CreateObject("Chilkat.JsonObject")
json.EmitCompact = 0
success = json.LoadSb(sbJsonResponse)

Response.Write "<pre>" & Server.HTMLEncode( "Response Status Code = " & rest.ResponseStatusCode) & "</pre>"

'  Did we get a 201 success response?
If (rest.ResponseStatusCode <> 201) Then
    Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "Failed.") & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>"

'  A successful JSON response:
'  The "id" is the refund_id.

'  	{ 
'  	  "id": "7NE550583A133505U",
'  	  "create_time": "2016-11-26T16:38:27Z",
'  	  "update_time": "2016-11-26T16:38:27Z",
'  	  "state": "completed",
'  	  "amount": { 
'  	    "total": "289.00",
'  	    "currency": "USD"
'  	  },
'  	  "sale_id": "1XC17935MN507400J",
'  	  "parent_payment": "PAY-2AA764602T410180HLA4FX6Q",
'  	  "links": [
'  	    { 
'  	      "href": "https://api.sandbox.paypal.com/v1/payments/refund/7NE550583A133505U",
'  	      "rel": "self",
'  	      "method": "GET"
'  	    },
'  	    { 
'  	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2AA764602T410180HLA4FX6Q",
'  	      "rel": "parent_payment",
'  	      "method": "GET"
'  	    },
'  	    { 
'  	      "href": "https://api.sandbox.paypal.com/v1/payments/sale/1XC17935MN507400J",
'  	      "rel": "sale",
'  	      "method": "GET"
'  	    }
'  	  ]
'  	}

%>
</body>
</html>