Classic ASP
PayPal - Refund Captured Payment

Refunds a captured payment, by ID. Include an amount object in the JSON request body.
Note: This example requires Chilkat v9.5.0.65 or greater.
Chilkat Classic ASP Downloads

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 json = Server.CreateObject("Chilkat.JsonObject")
json.EmitCompact = 0
success = json.UpdateString("amount.total","4.54")
success = json.UpdateString("amount.currency","USD")
success = json.UpdateString("description","Athletic socks")
success = json.UpdateString("reason","Refunding because color was incorrect")
Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"

' The JSON:

' 	{ 
' 	  "amount": { 
' 	    "total": "4.54",
' 	    "currency": "USD"
' 	  },
' 	  "description": "Athletic socks",
' 	  "reason": "Refunding because color was incorrect"
' 	}
' 
success = rest.AddHeader("Authorization",sbAuth.GetAsString())
success = rest.AddHeader("Content-Type","application/json")

' The capture ID is added to the path.
' To list your captures: Find Captures. 
set sbPath = Server.CreateObject("Chilkat.StringBuilder")
success = sbPath.Append("/v1/payments/capture/capture_id/refund")
numReplaced = sbPath.Replace("capture_id","1LY5310469661362J")

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

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

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": "77B77607RR7243500",
' 	  "create_time": "2016-11-27T01:38:25Z",
' 	  "update_time": "2016-11-27T01:38:25Z",
' 	  "state": "completed",
' 	  "amount": { 
' 	    "total": "4.54",
' 	    "currency": "USD"
' 	  },
' 	  "capture_id": "1LY5310469661362J",
' 	  "parent_payment": "PAY-2CY489250W145633HLA3DK3Y",
' 	  "links": [
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/refund/77B77607RR7243500",
' 	      "rel": "self",
' 	      "method": "GET"
' 	    },
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
' 	      "rel": "parent_payment",
' 	      "method": "GET"
' 	    },
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J",
' 	      "rel": "capture",
' 	      "method": "GET"
' 	    }
' 	  ]
' 	}

%>
</body>
</html>