Pascal (Lazarus/Delphi)
Pascal (Lazarus/Delphi)
PayPal - Find Authorizations
See more PayPal Examples
Finds previously created authorizations.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;
sbJsonResponse: TStringBuilder;
json: TJsonObject;
sbTemp: TStringBuilder;
jsonAuth: TJsonObject;
numPayments: Integer;
i: Integer;
j: Integer;
numTransactions: Integer;
numRelatedResources: Integer;
k: Integer;
begin
success := False;
// 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 = False) 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..
// ----------------------------------------------------------------------------------------------
// Clear the REST object of any headers or query params from previous requests.
rest.ClearAllHeaders();
rest.ClearAllQueryParams();
rest.AddHeader('Authorization',sbAuth.GetAsString());
// To find authoriaztions, we list payments and look for those
// containing "authorization" transactions
rest.AddQueryParam('count','100');
rest.AddQueryParam('start_index','0');
rest.AddQueryParam('sort_by','update_time');
rest.AddQueryParam('sort_order','asc');
// Send the GET request and get the JSON response.
sbJsonResponse := TStringBuilder.Create;
success := rest.FullRequestNoBodySb('GET','/v1/payments/payment',sbJsonResponse);
if (success = False) then
begin
WriteLn(rest.LastErrorText);
Exit;
end;
json := TJsonObject.Create;
json.EmitCompact := False;
json.LoadSb(sbJsonResponse);
// (optional) Save the entire JSON response to a file to examine if desired..
sbTemp := TStringBuilder.Create;
json.EmitSb(sbTemp);
sbTemp.WriteFile('qa_output/paypal_payments.json','utf-8',False);
WriteLn('Response Status Code = ' + rest.ResponseStatusCode);
// Did we get a 200 success response?
if (rest.ResponseStatusCode <> 200) then
begin
WriteLn(json.Emit());
WriteLn('Failed.');
Exit;
end;
// We are looking for "authorization" transactions .
// As shown below, we are looking in the "transactions" for "related_resources"
// containing "authorization" JSON objects.
// {
// "payments": [
// {
// "id": "PAY-3SL8976592063093RLA3DMAY",
// "create_time": "2016-11-24T00:36:19Z",
// "update_time": "2016-11-24T00:36:24Z",
// "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": "6HG91590AX913463C",
// "create_time": "2016-11-24T00:36:19Z",
// "update_time": "2016-11-24T00:36:24Z",
// "amount": {
// ...
// }
// },
// "state": "authorized",
// "parent_payment": "PAY-3SL8976592063093RLA3DMAY",
// "valid_until": "2016-12-23T00:36:19Z",
// ...
//
// Iterate over the payments and show each authorization
jsonAuth := TJsonObject.Create;
numPayments := json.SizeOfArray('payments');
i := 0;
while i < numPayments do
begin
json.I := i;
j := 0;
numTransactions := json.SizeOfArray('payments[i].transactions');
while j < numTransactions do
begin
json.J := j;
numRelatedResources := json.SizeOfArray('payments[i].transactions[j].related_resources');
k := 0;
while k < numRelatedResources do
begin
json.K := k;
if (json.HasMember('payments[i].transactions[j].related_resources[k].authorization') = True) then
begin
json.ObjectOf2('payments[i].transactions[j].related_resources[k].authorization',jsonAuth);
WriteLn('authorization id: ' + jsonAuth.StringOf('id'));
WriteLn('state: ' + jsonAuth.StringOf('state'));
WriteLn('total: ' + jsonAuth.StringOf('amount.total'));
WriteLn('----');
end;
k := k + 1;
end;
j := j + 1;
end;
i := i + 1;
end;
WriteLn('success');
jsonToken.Free;
sbAuth.Free;
rest.Free;
sbJsonResponse.Free;
json.Free;
sbTemp.Free;
jsonAuth.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.