(Excel) PayPal - Capture Authorization

Capture and process a previously created authorization. The original payment call must have the intent set to authorize.

Note: This example requires Chilkat v9.5.0.65 or greater.

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' 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)
Dim jsonToken As Chilkat.JsonObject
Set jsonToken = Chilkat.NewJsonObject
Dim success As Boolean
success = jsonToken.LoadFile("qa_data/tokens/paypal.json")

' Build the Authorization request header field value.
Dim sbAuth As Chilkat.StringBuilder
Set sbAuth = Chilkat.NewStringBuilder
' 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.
Dim rest As Chilkat.Rest
Set rest = Chilkat.NewRest

bAutoReconnect = True

success = rest.Connect("api.sandbox.paypal.com",443,True,bAutoReconnect)
If (success <> True) Then
    Debug.Print rest.LastErrorText
    Exit Sub
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 capture a particular amount, build JSON such as this:
Dim json As Chilkat.JsonObject
Set json = Chilkat.NewJsonObject
json.EmitCompact = False
success = json.UpdateString("amount.currency","USD")
success = json.UpdateString("amount.total","6.70")
' is_final_capture is optional and indicates whether to release all remaining funds that the authorization holds in the funding instrument.
success = json.UpdateBool("is_final_capture",True)
Debug.Print json.Emit()

' The JSON created by the above code:

' 	{ 
' 	  "amount": { 
' 	    "currency": "USD",
' 	    "total": "6.70"
' 	  },
' 	  "is_final_capture": true
' 	}

' This is the OAuth2 Authorization header, not to be confused with a PayPal credit card authorization...
success = rest.AddHeader("Authorization",sbAuth.GetAsString())
success = rest.AddHeader("Content-Type","application/json")

' The authorization ID is added to the path.
' The authorization ID is obtained from payment records as shown here: Find Authorizations
Dim sbPath As Chilkat.StringBuilder
Set sbPath = Chilkat.NewStringBuilder
success = sbPath.Append("/v1/payments/authorization/authorization_id/capture")

numReplaced = sbPath.Replace("authorization_id","6HG91590AX913463C")

' Send the POST request containing the JSON in the request body, and get the JSON response.
Dim sbJsonRequest As Chilkat.StringBuilder
Set sbJsonRequest = Chilkat.NewStringBuilder
json.EmitCompact = True
success = json.EmitSb(sbJsonRequest)
Dim sbJsonResponse As Chilkat.StringBuilder
Set sbJsonResponse = Chilkat.NewStringBuilder

success = rest.FullRequestSb("POST",sbPath.GetAsString(),sbJsonRequest,sbJsonResponse)
If (success <> True) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

json.EmitCompact = False
success = json.LoadSb(sbJsonResponse)

Debug.Print "Response Status Code = "; rest.ResponseStatusCode

' Did we get a 200 success response?
If (rest.ResponseStatusCode <> 200) Then
    Debug.Print json.Emit()
    Debug.Print "Failed."
    Exit Sub
End If

Debug.Print json.Emit()
Debug.Print "Success."

' A successful JSON response:

' 	{ 
' 	  "id": "87S70321AE222860G",
' 	  "create_time": "2016-11-26T17:27:46Z",
' 	  "update_time": "2016-11-26T17:27:50Z",
' 	  "amount": { 
' 	    "total": "6.70",
' 	    "currency": "USD"
' 	  },
' 	  "is_final_capture": true,
' 	  "state": "completed",
' 	  "reasonCode": "None",
' 	  "parent_payment": "PAY-3SL8976592063093RLA3DMAY",
' 	  "transaction_fee": { 
' 	    "value": "0.49",
' 	    "currency": "USD"
' 	  },
' 	  "links": [
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/87S70321AE222860G",
' 	      "rel": "self",
' 	      "method": "GET"
' 	    },
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/87S70321AE222860G/refund",
' 	      "rel": "refund",
' 	      "method": "POST"
' 	    },
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/authorization/6HG91590AX913463C",
' 	      "rel": "authorization",
' 	      "method": "GET"
' 	    },
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-3SL8976592063093RLA3DMAY",
' 	      "rel": "parent_payment",
' 	      "method": "GET"
' 	    }
' 	  ]
' 	}
'