Xbase++

PayPal - Create a PayPal Payment

See more PayPal Examples

Creates a payment to be paid from a PayPal account (as opposed to being funded by a credit card).

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 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("intent", "sale")
oJson:UpdateString("redirect_urls.return_url", "http://www.example.com/return_url")
oJson:UpdateString("redirect_urls.cancel_url", "http://www.example.com/cancel_url")
oJson:UpdateString("payer.payment_method", "paypal")
oJson:UpdateString("transactions[0].amount.total", "7.47")
oJson:UpdateString("transactions[0].amount.currency", "USD")
oJson:UpdateString("transactions[0].description", "This is the payment transaction description.")

? oJson:Emit()

//  The JSON created by the above code is this:

//  	{ 
//  	  "intent": "sale",
//  	  "redirect_urls": { 
//  	    "return_url": "http://www.example.com/return_url",
//  	    "cancel_url": "http://www.example.com/cancel_url"
//  	  },
//  	  "payer": { 
//  	    "payment_method": "paypal"
//  	  },
//  	  "transactions": [
//  	    { 
//  	      "amount": { 
//  	        "total": "7.47",
//  	        "currency": "USD"
//  	      },
//  	      "description": "This is the payment transaction description."
//  	    }
//  	  ]
//  	}

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

//  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", "/v1/payments/payment", oSbJsonRequest, oSbJsonResponse)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oJsonToken:destroy()
    oSbAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oSbJsonRequest:destroy()
    oSbJsonResponse:destroy()
    RETURN
ENDIF

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

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

//  Did we get a 201 success response?
IF (oRest:ResponseStatusCode != 201)
    ? oJson:Emit()
    ? "Failed."
    oJsonToken:destroy()
    oSbAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    oSbJsonRequest:destroy()
    oSbJsonResponse:destroy()
    RETURN
ENDIF

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

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

//  	{ 
//  	  "id": "PAY-1XK50350XV338620BLA3CZGI",
//  	  "intent": "sale",
//  	  "state": "created",
//  	  "payer": { 
//  	    "payment_method": "paypal",
//  	    "use_vendor_currency_conversion": false
//  	  },
//  	  "transactions": [
//  	    { 
//  	      "amount": { 
//  	        "total": "7.47",
//  	        "currency": "USD"
//  	      },
//  	      "description": "This is the payment transaction description.",
//  	      "related_resources": [
//  	      ]
//  	    }
//  	  ],
//  	  "create_time": "2016-11-23T23:56:09Z",
//  	  "links": [
//  	    { 
//  	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-1XK50350XV338620BLA3CZGI",
//  	      "rel": "self",
//  	      "method": "GET"
//  	    },
//  	    { 
//  	      "href": "https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-0BG932459F977083J",
//  	      "rel": "approval_url",
//  	      "method": "REDIRECT"
//  	    },
//  	    { 
//  	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-1XK50350XV338620BLA3CZGI/execute",
//  	      "rel": "execute",
//  	      "method": "POST"
//  	    }
//  	  ]
//  	}

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