Chilkat Examples

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Delphi DLL Web API Examples

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(Delphi DLL) PayPal - Update Invoice

Update a PayPal invoice.

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

See also PayPal Update Invoice REST API Reference

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
jsonToken: HCkJsonObject;
sbAuth: HCkStringBuilder;
rest: HCkRest;
bAutoReconnect: Boolean;
success: Boolean;
json: HCkJsonObject;
invoiceId: PWideChar;
sbPath: HCkStringBuilder;
sbJsonRequest: HCkStringBuilder;
sbJsonResponse: HCkStringBuilder;
numItems: Integer;
i: Integer;

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 := CkJsonObject_Create();
CkJsonObject_LoadFile(jsonToken,'qa_data/tokens/paypal.json');

// Build the Authorization request header field value.
sbAuth := CkStringBuilder_Create();
// token_type should be "Bearer"
CkStringBuilder_Append(sbAuth,CkJsonObject__stringOf(jsonToken,'token_type'));
CkStringBuilder_Append(sbAuth,' ');
CkStringBuilder_Append(sbAuth,CkJsonObject__stringOf(jsonToken,'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 := CkRest_Create();
bAutoReconnect := True;
success := CkRest_Connect(rest,'api.sandbox.paypal.com',443,True,bAutoReconnect);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    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..
// ----------------------------------------------------------------------------------------------

// First create the JSON with updated information:

json := CkJsonObject_Create();
CkJsonObject_putEmitCompact(json,False);
CkJsonObject_UpdateString(json,'merchant_info.email','smith-facilitator@chilkatsoft.com');
CkJsonObject_UpdateString(json,'merchant_info.first_name','Joe');
CkJsonObject_UpdateString(json,'merchant_info.last_name','Facilitator');
CkJsonObject_UpdateString(json,'merchant_info.business_name','Medical Professionals, LLC');
CkJsonObject_UpdateString(json,'merchant_info.phone.country_code','001');
CkJsonObject_UpdateString(json,'merchant_info.phone.national_number','5032141716');
CkJsonObject_UpdateString(json,'merchant_info.address.line1','1234 Main St.');
CkJsonObject_UpdateString(json,'merchant_info.address.city','Portland');
CkJsonObject_UpdateString(json,'merchant_info.address.state','OR');
CkJsonObject_UpdateString(json,'merchant_info.address.postal_code','97217');
CkJsonObject_UpdateString(json,'merchant_info.address.country_code','US');
CkJsonObject_UpdateString(json,'billing_info[0].email','smith-buyer@chilkatsoft.com');
CkJsonObject_UpdateString(json,'shipping_info.first_name','Sally');
CkJsonObject_UpdateString(json,'shipping_info.last_name','Patient');
CkJsonObject_UpdateString(json,'shipping_info.business_name','Not applicable');
CkJsonObject_UpdateString(json,'shipping_info.phone.country_code','001');
CkJsonObject_UpdateString(json,'shipping_info.phone.national_number','5039871234');
CkJsonObject_UpdateString(json,'shipping_info.address.line1','1234 Broad St.');
CkJsonObject_UpdateString(json,'shipping_info.address.city','Portland');
CkJsonObject_UpdateString(json,'shipping_info.address.state','OR');
CkJsonObject_UpdateString(json,'shipping_info.address.postal_code','97216');
CkJsonObject_UpdateString(json,'shipping_info.address.country_code','US');
CkJsonObject_UpdateString(json,'items[0].name','Sutures');
// We are updating the quantity from 100.0 to 200.0
// Note: The UpdateNumber method is added in v9.5.0.65
CkJsonObject_UpdateNumber(json,'items[0].quantity','200.0');
CkJsonObject_UpdateString(json,'items[0].unit_price.currency','USD');
CkJsonObject_UpdateString(json,'items[0].unit_price.value','5.00');
CkJsonObject_UpdateString(json,'payment_term.term_type','NET_45');
CkJsonObject_UpdateString(json,'payment_term.due_date','2016-12-30 PST');
CkJsonObject_UpdateString(json,'note','Medical Invoice 16 Jul, 2013 PST');

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

// 	{ 
// 	  "merchant_info": { 
// 	    "email": "smith-facilitator@chilkatsoft.com",
// 	    "first_name": "Joe",
// 	    "last_name": "Facilitator",
// 	    "business_name": "Medical Professionals, LLC",
// 	    "phone": { 
// 	      "country_code": "001",
// 	      "national_number": "5032141716"
// 	    },
// 	    "address": { 
// 	      "line1": "1234 Main St.",
// 	      "city": "Portland",
// 	      "state": "OR",
// 	      "postal_code": "97217",
// 	      "country_code": "US"
// 	    }
// 	  },
// 	  "billing_info": [
// 	    { 
// 	      "email": "smith-buyer@chilkatsoft.com"
// 	    }
// 	  ],
// 	  "shipping_info": { 
// 	    "first_name": "Sally",
// 	    "last_name": "Patient",
// 	    "business_name": "Not applicable",
// 	    "phone": { 
// 	      "country_code": "001",
// 	      "national_number": "5039871234"
// 	    },
// 	    "address": { 
// 	      "line1": "1234 Broad St.",
// 	      "city": "Portland",
// 	      "state": "OR",
// 	      "postal_code": "97216",
// 	      "country_code": "US"
// 	    }
// 	  },
// 	  "items": [
// 	    { 
// 	      "name": "Sutures",
// 	      "quantity": 200.0,
// 	      "unit_price": { 
// 	        "currency": "USD",
// 	        "value": "5.00"
// 	      }
// 	    }
// 	  ],
// 	  "payment_term": { 
// 	    "term_type": "NET_45",
// 	    "due_date": "2016-12-30 PST"
// 	  },
// 	  "note": "Medical Invoice 16 Jul, 2013 PST"
// 	}

CkRest_AddHeader(rest,'Authorization',CkStringBuilder__getAsString(sbAuth));
CkRest_AddHeader(rest,'Content-Type','application/json');

invoiceId := 'INV2-XV4B-736P-PLVN-SZCE';

sbPath := CkStringBuilder_Create();
CkStringBuilder_Append(sbPath,'/v1/invoicing/invoices/');
CkStringBuilder_Append(sbPath,invoiceId);

// Send the PUT request containign the JSON in the request body, and get the JSON response.
sbJsonRequest := CkStringBuilder_Create();
CkJsonObject_EmitSb(json,sbJsonRequest);
sbJsonResponse := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'PUT',CkStringBuilder__getAsString(sbPath),sbJsonRequest,sbJsonResponse);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

CkJsonObject_LoadSb(json,sbJsonResponse);

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

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

// Sample response JSON is shown below.

// Get some information..
Memo1.Lines.Add('email: ' + CkJsonObject__stringOf(json,'merchant_info.email'));
Memo1.Lines.Add('business_name: ' + CkJsonObject__stringOf(json,'merchant_info.business_name'));

numItems := CkJsonObject_SizeOfArray(json,'items');
i := 0;
while i < numItems do
  begin
    CkJsonObject_putI(json,i);
    Memo1.Lines.Add('item name: ' + CkJsonObject__stringOf(json,'items[i].name'));
    Memo1.Lines.Add('item quantity: ' + CkJsonObject__stringOf(json,'items[i].quantity'));
    Memo1.Lines.Add('item currency: ' + CkJsonObject__stringOf(json,'items[i].unit_price.currency'));
    Memo1.Lines.Add('item value: ' + CkJsonObject__stringOf(json,'items[i].unit_price.value'));
    Memo1.Lines.Add('----');
    i := i + 1;
  end;

Memo1.Lines.Add('Success.');

CkJsonObject_Dispose(jsonToken);
CkStringBuilder_Dispose(sbAuth);
CkRest_Dispose(rest);
CkJsonObject_Dispose(json);
CkStringBuilder_Dispose(sbPath);
CkStringBuilder_Dispose(sbJsonRequest);
CkStringBuilder_Dispose(sbJsonResponse);

end;

 

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