Pascal (Lazarus/Delphi)
Pascal (Lazarus/Delphi)
PayPal - Authorize a Payment
See more PayPal Examples
Creates an authorization for a payment. This is for the case where the payment will first be authorized, and then captured at a later date. (In other words, the buyer is providing his/her credit card information now, and the actual charge (capture) will take place at a later time.)Creating the authorization is the same as creating "sale" payment, except the intent is set to "authorize" instead of "sale".
This example requests an authorization for a credit card payment (using a credit card ID previoulsy stored in the PayPal vault).
Note: This example requires Chilkat v9.5.0.65 or greater.
Chilkat Pascal (Lazarus/Delphi) Downloads
program ChilkatDemo;
// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}
uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
SysUtils,
CkDllLoader,
Chilkat.StringBuilder,
Chilkat.Rest,
Chilkat.JsonObject;
// ---------------------------------------------------------------------------
procedure RunDemo;
var
success: Boolean;
jsonToken: TJsonObject;
sbAuth: TStringBuilder;
rest: TRest;
bAutoReconnect: Boolean;
json: TJsonObject;
sbJsonRequest: TStringBuilder;
sbJsonResponse: TStringBuilder;
begin
success := False;
// 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)
jsonToken := TJsonObject.Create;
jsonToken.LoadFile('qa_data/tokens/paypal.json');
// Build the Authorization request header field value.
sbAuth := TStringBuilder.Create;
// token_type should be "Bearer"
sbAuth.Append(jsonToken.StringOf('token_type'));
sbAuth.Append(' ');
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.
rest := TRest.Create;
bAutoReconnect := True;
success := rest.Connect('api.sandbox.paypal.com',443,True,bAutoReconnect);
if (success <> True) then
begin
WriteLn(rest.LastErrorText);
Exit;
end;
// ----------------------------------------------------------------------------------------------
// 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.
json := TJsonObject.Create;
json.EmitCompact := False;
json.UpdateString('intent','authorize');
json.UpdateString('payer.payment_method','credit_card');
json.UpdateString('payer.funding_instruments[0].credit_card_token.credit_card_id','CARD-52W84623JH8043102LA3CLGA');
json.UpdateString('payer.funding_instruments[0].credit_card_token.payer_id','user12345');
json.UpdateString('transactions[0].amount.total','6.70');
json.UpdateString('transactions[0].amount.currency','USD');
json.UpdateString('transactions[0].description','This is the payment transaction description.');
WriteLn(json.Emit());
// The JSON created by the above code is this:
// {
// "intent": "authorize",
// "payer": {
// "payment_method": "credit_card",
// "funding_instruments": [
// {
// "credit_card_token": {
// "credit_card_id": "CARD-52W84623JH8043102LA3CLGA",
// "payer_id": "user12345"
// }
// }
// ]
// },
// "transactions": [
// {
// "amount": {
// "total": "6.70",
// "currency": "USD"
// },
// "description": "This is the payment transaction description."
// }
// ]
// }
rest.AddHeader('Authorization',sbAuth.GetAsString());
rest.AddHeader('Content-Type','application/json');
// Send the POST request containign the JSON in the request body, and get the JSON response.
sbJsonRequest := TStringBuilder.Create;
json.EmitCompact := True;
json.EmitSb(sbJsonRequest);
sbJsonResponse := TStringBuilder.Create;
success := rest.FullRequestSb('POST','/v1/payments/payment',sbJsonRequest,sbJsonResponse);
if (success <> True) then
begin
WriteLn(rest.LastErrorText);
Exit;
end;
json.EmitCompact := False;
json.LoadSb(sbJsonResponse);
WriteLn('Response Status Code = ' + rest.ResponseStatusCode);
// Did we get a 201 success response?
if (rest.ResponseStatusCode <> 201) then
begin
WriteLn(json.Emit());
WriteLn('Failed.');
Exit;
end;
// Sample JSON response is shown below.
WriteLn(json.Emit());
// The authorization ID found in the related_resources is used to capture the payment at a later time.
WriteLn('authorization id: ' + json.StringOf('transactions[0].related_resources[0].authorization.id'));
WriteLn('success');
// ------------------------------------------------
// A sample JSON response:
// {
// "id": "PAY-2CY489250W145633HLA3DK3Y",
// "create_time": "2016-11-24T00:33:51Z",
// "update_time": "2016-11-24T00:33:58Z",
// "state": "approved",
// "intent": "authorize",
// "payer": {
// "payment_method": "credit_card",
// "funding_instruments": [
// {
// "credit_card_token": {
// "credit_card_id": "CARD-52W84623JH8043102LA3CLGA",
// "payer_id": "user12345",
// "last4": "9974",
// "type": "visa",
// "expire_month": "9",
// "expire_year": "2021"
// }
// }
// ]
// },
// "transactions": [
// {
// "amount": {
// "total": "6.70",
// "currency": "USD",
// "details": {
// "subtotal": "6.70"
// }
// },
// "description": "This is the payment transaction description.",
// "related_resources": [
// {
// "authorization": {
// "id": "7X8332687A4929542",
// "create_time": "2016-11-24T00:33:51Z",
// "update_time": "2016-11-24T00:33:58Z",
// "amount": {
// "total": "6.70",
// "currency": "USD",
// "details": {
// "subtotal": "6.70"
// }
// },
// "state": "authorized",
// "parent_payment": "PAY-2CY489250W145633HLA3DK3Y",
// "valid_until": "2016-12-23T00:33:51Z",
// "links": [
// {
// "href": "https://api.sandbox.paypal.com/v1/payments/authorization/7X8332687A4929542",
// "rel": "self",
// "method": "GET"
// },
// {
// "href": "https://api.sandbox.paypal.com/v1/payments/authorization/7X8332687A4929542/capture",
// "rel": "capture",
// "method": "POST"
// },
// {
// "href": "https://api.sandbox.paypal.com/v1/payments/authorization/7X8332687A4929542/void",
// "rel": "void",
// "method": "POST"
// },
// {
// "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
// "rel": "parent_payment",
// "method": "GET"
// }
// ],
// "processor_response": {
// "avs_code": "X",
// "cvv_code": "M"
// },
// "fmf_details": {}
// }
// }
// ]
// }
// ],
// "links": [
// {
// "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-2CY489250W145633HLA3DK3Y",
// "rel": "self",
// "method": "GET"
// }
// ]
// }
jsonToken.Free;
sbAuth.Free;
rest.Free;
json.Free;
sbJsonRequest.Free;
sbJsonResponse.Free;
end;
// ---------------------------------------------------------------------------
begin
try
RunDemo;
except
on E: Exception do
WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
end;
WriteLn;
{$IFDEF MSWINDOWS}
WriteLn('Press Enter to exit...');
ReadLn;
{$ENDIF}
end.