(Delphi ActiveX) PayPal - Execute Approved PayPal Payment

Executes an approved PayPal payment. (This is for executing an approved PayPal payment, not a credit card payment.)

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

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
jsonToken: TChilkatJsonObject;
sbAuth: TChilkatStringBuilder;
rest: TChilkatRest;
bAutoReconnect: Integer;
success: Integer;
json: TChilkatJsonObject;
sbPath: TChilkatStringBuilder;
numReplaced: Integer;
sbJsonRequest: TChilkatStringBuilder;
sbJsonResponse: TChilkatStringBuilder;

begin
// 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 := TChilkatJsonObject.Create(Self);
jsonToken.LoadFile('qa_data/tokens/paypal.json');

// Build the Authorization request header field value.
sbAuth := TChilkatStringBuilder.Create(Self);
// 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 := TChilkatRest.Create(Self);
bAutoReconnect := 1;
success := rest.Connect('api.sandbox.paypal.com',443,1,bAutoReconnect);
if (success <> 1) then
  begin
    Memo1.Lines.Add(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 payer_id
json := TChilkatJsonObject.Create(Self);
json.EmitCompact := 0;
json.AppendString('payer_id','RRCYJUTFJGZTA');
Memo1.Lines.Add(json.Emit());

// The JSON created by the above code:

// 	{ 
// 	  "payer_id": "RRCYJUTFJGZTA"
// 	}

rest.AddHeader('Authorization',sbAuth.GetAsString());
rest.AddHeader('Content-Type','application/json');

// The payment ID is passed in the path.
sbPath := TChilkatStringBuilder.Create(Self);
sbPath.Append('/v1/payments/payment/payment_id/execute');
numReplaced := sbPath.Replace('payment_id','PAY-4N746561P0587231SKQQK6MY');

// Send the POST request containign the JSON in the request body, and get the JSON response.
sbJsonRequest := TChilkatStringBuilder.Create(Self);
json.EmitCompact := 1;
json.EmitSb(sbJsonRequest.ControlInterface);
sbJsonResponse := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('POST',sbPath.GetAsString(),sbJsonRequest.ControlInterface,sbJsonResponse.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

json.EmitCompact := 0;
json.LoadSb(sbJsonResponse.ControlInterface);

Memo1.Lines.Add('Response Status Code = ' + IntToStr(rest.ResponseStatusCode));

// Did we get a 200 success response?
if (rest.ResponseStatusCode <> 200) then
  begin
    Memo1.Lines.Add(json.Emit());
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample JSON response is shown below.
Memo1.Lines.Add(json.Emit());

Memo1.Lines.Add('success');

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

// 	{ 
// 	  "id": "PAY-4N746561P0587231SKQQK6MY",
// 	  "create_time": "2014-09-22T23:22:27Z",
// 	  "update_time": "2014-09-22T23:31:13Z",
// 	  "state": "approved",
// 	  "intent": "sale",
// 	  "payer": { 
// 	    "payment_method": "paypal",
// 	    "payer_info": { 
// 	      "email": "npurayil-uspr-60@paypal.com",
// 	      "first_name": "Brian",
// 	      "last_name": "Robinson",
// 	      "payer_id": "JMKDKJ4D7DG7G",
// 	      "shipping_address": { 
// 	        "line1": "4thFloor",
// 	        "line2": "unit#34",
// 	        "city": "SAn Jose",
// 	        "state": "CA",
// 	        "postal_code": "95131",
// 	        "country_code": "US",
// 	        "phone": "011862212345678",
// 	        "recipient_name": "HelloWorld"
// 	      }
// 	    }
// 	  },
// 	  "transactions": [
// 	    { 
// 	      "amount": { 
// 	        "total": "30.11",
// 	        "currency": "USD",
// 	        "details": { 
// 	          "subtotal": "30.00",
// 	          "tax": "0.07",
// 	          "shipping": "0.03",
// 	          "handling_fee": "1.00",
// 	          "insurance": "0.01",
// 	          "shipping_discount": "-1.00"
// 	        }
// 	      },
// 	      "description": "This is the payment transaction description.",
// 	      "item_list": { 
// 	        "items": [
// 	          { 
// 	            "name": "hat",
// 	            "sku": "1",
// 	            "price": "3.00",
// 	            "currency": "USD",
// 	            "quantity": "5",
// 	            "description": "Brown color hat",
// 	            "tax": "0.01"
// 	          },
// 	          { 
// 	            "name": "handbag",
// 	            "sku": "product34",
// 	            "price": "15.00",
// 	            "currency": "USD",
// 	            "quantity": "1",
// 	            "description": "Black color handbag",
// 	            "tax": "0.02"
// 	          }
// 	        ],
// 	        "shipping_address": { 
// 	          "recipient_name": "HelloWorld",
// 	          "line1": "4thFloor",
// 	          "line2": "unit#34",
// 	          "city": "SAn Jose",
// 	          "state": "CA",
// 	          "phone": "011862212345678",
// 	          "postal_code": "95131",
// 	          "country_code": "US"
// 	        }
// 	      },
// 	      "related_resources": [
// 	        { 
// 	          "sale": { 
// 	            "id": "4XP56210M0797192Y",
// 	            "create_time": "2014-09-22T23:22:27Z",
// 	            "update_time": "2014-09-22T23:31:13Z",
// 	            "amount": { 
// 	              "total": "30.11",
// 	              "currency": "USD"
// 	            },
// 	            "payment_mode": "INSTANT_TRANSFER",
// 	            "state": "completed",
// 	            "protection_eligibility": "ELIGIBLE",
// 	            "protection_eligibility_type": "ITEM_NOT_RECEIVED_ELIGIBLE",
// 	            "transaction_fee": { 
// 	              "value": "1.75",
// 	              "currency": "USD"
// 	            },
// 	            "parent_payment": "PAY-4N746561P0587231SKQQK6MY",
// 	            "links": [
// 	              { 
// 	                "href": "https://api.paypal.com/v1/payments/sale/4XP56210M0797192Y",
// 	                "rel": "self",
// 	                "method": "GET"
// 	              },
// 	              { 
// 	                "href": "https://api.paypal.com/v1/payments/sale/4XP56210M0797192Y/refund",
// 	                "rel": "refund",
// 	                "method": "POST"
// 	              },
// 	              { 
// 	                "href": "https://api.paypal.com/v1/payments/payment/PAY-4N746561P0587231SKQQK6MY",
// 	                "rel": "parent_payment",
// 	                "method": "GET"
// 	              }
// 	            ]
// 	          }
// 	        }
// 	      ]
// 	    }
// 	  ],
// 	  "links": [
// 	    { 
// 	      "href": "https://api.paypal.com/v1/payments/payment/PAY-4N746561P0587231SKQQK6MY",
// 	      "rel": "self",
// 	      "method": "GET"
// 	    }
// 	  ]
// 	}
end;