Xbase++

PayPal - Capture a Previously Authorized Payment

See more PayPal Examples

Captures a previously authorized payment.

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

Xbase++

LOCAL nSuccess
LOCAL oJsonToken
LOCAL oSbAuth
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL oJson
LOCAL oSbPath
LOCAL nNumReplacements
LOCAL oSbJsonRequest
LOCAL oSbJsonResponse

nSuccess := 0

//  Note: Requires Chilkat v9.5.0.65 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)
oJsonToken := CreateObject("Chilkat.JsonObject")
oJsonToken:LoadFile("qa_data/tokens/paypal.json")

//  Build the Authorization request header field value.
oSbAuth := CreateObject("Chilkat.StringBuilder")
//  token_type should be "Bearer"
oSbAuth:Append(oJsonToken:StringOf("token_type"))
oSbAuth:Append(" ")
oSbAuth:Append(oJsonToken: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.
oRest := CreateObject("Chilkat.Rest")
nBAutoReconnect := 1
nSuccess := oRest:Connect("api.sandbox.paypal.com", 443, 1, nBAutoReconnect)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oJsonToken:destroy()
    oSbAuth:destroy()
    oRest:destroy()
    RETURN
ENDIF

//  ----------------------------------------------------------------------------------------------
//  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..
//  ----------------------------------------------------------------------------------------------

//  Build the JSON containing the transaction information.
oJson := CreateObject("Chilkat.JsonObject")
oJson:EmitCompact := 0
oJson:UpdateString("amount.currency", "USD")
oJson:UpdateString("amount.total", "4.54")
oJson:UpdateBool("is_final_capture", 1)
? oJson:Emit()

//  The JSON created by the above code:

//  	{ 
//  	  "amount": { 
//  	    "currency": "USD",
//  	    "total": "4.54"
//  	  },
//  	  "is_final_capture": true
//  	}

oRest:AddHeader("Authorization", oSbAuth:GetAsString())
oRest:AddHeader("Content-Type", "application/json")

//  To capture payment, make a call to /v1/payments/authorization/[authorization_id]/capture with the authorization ID in the URI.
//  See PayPal Authorize Payment for sample code to create the authorization.
//  The "7X8332687A4929542" comes from the "transactions[0].related_resources[0].authorization.id" part of the authorization response.

oSbPath := CreateObject("Chilkat.StringBuilder")
oSbPath:Append("/v1/payments/authorization/[authorization_id]/capture")
nNumReplacements := oSbPath:Replace("[authorization_id]", "7X8332687A4929542")

//  Send the POST request containign the JSON in the request body, and get the JSON response.
oSbJsonRequest := CreateObject("Chilkat.StringBuilder")
oJson:EmitCompact := 1
oJson:EmitSb(oSbJsonRequest)
oSbJsonResponse := CreateObject("Chilkat.StringBuilder")
nSuccess := oRest:FullRequestSb("POST", oSbPath:GetAsString(), oSbJsonRequest, oSbJsonResponse)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oJsonToken:destroy()
    oSbAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oSbPath:destroy()
    oSbJsonRequest:destroy()
    oSbJsonResponse:destroy()
    RETURN
ENDIF

oJson:EmitCompact := 0
oJson:LoadSb(oSbJsonResponse)

? "Response Status Code = " + Str(oRest:ResponseStatusCode)

//  IMPORTANT: In most PayPal examples, the return status code is 201.
//  For this particular call, PayPal returns status code 200.

//  Did we get a 200 success response?
IF (oRest:ResponseStatusCode != 200)
    ? oJson:Emit()
    ? "Failed."
    oJsonToken:destroy()
    oSbAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oSbPath:destroy()
    oSbJsonRequest:destroy()
    oSbJsonResponse:destroy()
    RETURN
ENDIF

//  Sample JSON response is shown below.
? oJson:Emit()

? "success"

//  ------------------------------------------------
//  A sample JSON response:

//  	{ 
//  	  "id": "1LY5310469661362J",
//  	  "create_time": "2016-11-24T00:40:50Z",
//  	  "update_time": "2016-11-24T00:40:54Z",
//  	  "amount": { 
//  	    "total": "4.54",
//  	    "currency": "USD"
//  	  },
//  	  "is_final_capture": true,
//  	  "state": "completed",
//  	  "reasonCode": "None",
//  	  "parent_payment": "PAY-2CY489250W145633HLA3DK3Y",
//  	  "transaction_fee": { 
//  	    "value": "0.43",
//  	    "currency": "USD"
//  	  },
//  	  "links": [
//  	    { 
//  	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J",
//  	      "rel": "self",
//  	      "method": "GET"
//  	    },
//  	    { 
//  	      "href": "https://api.sandbox.paypal.com/v1/payments/capture/1LY5310469661362J/refund",
//  	      "rel": "refund",
//  	      "method": "POST"
//  	    },
//  	    { 
//  	      "href": "https://api.sandbox.paypal.com/v1/payments/authorization/7X8332687A4929542",
//  	      "rel": "authorization",
//  	      "method": "GET"
//  	    },
//  	    { 
//  	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
//  	      "rel": "parent_payment",
//  	      "method": "GET"
//  	    }
//  	  ]
//  	}

oJsonToken:destroy()
oSbAuth:destroy()
oRest:destroy()
oJson:destroy()
oSbPath:destroy()
oSbJsonRequest:destroy()
oSbJsonResponse:destroy()