Delphi DLL

Amazon Pay - Create Delivery Tracker

See more Amazon Pay Examples

Create a Delivery Tracker once an order has been shipped and a tracking code has been generated. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
json: HCkJsonObject;
privKey: HCkPrivateKey;
publicKeyId: PWideChar;
resp: HCkHttpResponse;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
trackingNumber: PWideChar;
carrierCode: PWideChar;
amazonOrderReferenceId: PWideChar;
i: Integer;
count_i: Integer;

begin
success := False;

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := CkHttp_Create();

// Implements the following POST:

// POST /:version/deliveryTrackers HTTP/1.1
// Host: pay-api.amazon.com
// Accept: application/json
// Authorization: AMZN-PAY-RSASSA-PSS PublicKeyId=f4fc06fc-c5a7-11e7-abc4-cec278b6b50a, SignedHeaders=content-type;x-amz-pay-date, Signature=4164128ec5d1b9da1700167ab2ccda8125f472c8bb9de447cebf5d741ee317c8       
// X-Amz-Pay-Date: 20190305T024410Z
// Content-type: application/json
// 
// {
//     "amazonOrderReferenceId" : "P00-0000000-0000000",
//     "deliveryDetails" : [{
//     "trackingNumber" : "1Z999AA10123456784",
//     "carrierCode" : "UPS"
//   }]
// }

// Use the following online tool to generate HTTP code from a CURL command
// Convert a Raw HTTP Request to Source Code

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//     "amazonOrderReferenceId" : "P00-0000000-0000000",
//     "deliveryDetails" : [{
//     "trackingNumber" : "1Z999AA10123456784",
//     "carrierCode" : "UPS"
//   }]
// }

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'amazonOrderReferenceId','P00-0000000-0000000');
CkJsonObject_UpdateString(json,'deliveryDetails[0].trackingNumber','1Z999AA10123456784');
CkJsonObject_UpdateString(json,'deliveryDetails[0].carrierCode','UPS');

// Load your Amazon Pay private key.  
// There are many other ways to load private keys into the Chilkat private key object, such as from different formats,
// or from in-memory strings or bytes.
privKey := CkPrivateKey_Create();
success := CkPrivateKey_LoadPemFile(privKey,'C:/someDir/myAmazonPayPrivateKey.pem');
if (success = False) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

// Provide your Amazon Pay private key and Public Key ID 
// Use your public key ID here.  It must be the one associated with the private key.
// Note: The SetAuthPrivateKey method was added in Chilkat v9.5.0.89
publicKeyId := 'SANDBOX-AHEGSJCM3L2S637RBGABLAFW';
success := CkHttp_SetAuthPrivateKey(http,publicKeyId,privKey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// Note: When the private key is provided as shown above, Chilkat will automatically add the required x-amz-pay-* headers to the HTTP request,
// and will also sign the request.  Nothing more is needed.
// Chilkat automatically generates and adds the following headers:
// 
// x-amz-pay-date
// x-amz-pay-host
// x-amz-pay-region
// x-amz-pay-idempotency-key
// Authorization

CkHttp_putAccept(http,'application/json');

// To use the live system, replace "sandbox" with "live" in the URL passed to HttpJson.
// Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST','https://pay-api.amazon.eu/sandbox/v2/deliveryTrackers',json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

sbResponseBody := CkStringBuilder_Create();
CkHttpResponse_GetBodySb(resp,sbResponseBody);
jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

// If the status code is not equal to 200, this will display error information.
Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//     "amazonOrderReferenceId": "P00-0000000-0000000",
//     "deliveryDetails": [{
//         "trackingNumber": "1Z999AA10123456784",
//         "carrierCode": "UPS"
//     }]
// }

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

amazonOrderReferenceId := CkJsonObject__stringOf(jResp,'amazonOrderReferenceId');
i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'deliveryDetails');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    trackingNumber := CkJsonObject__stringOf(jResp,'deliveryDetails[i].trackingNumber');
    carrierCode := CkJsonObject__stringOf(jResp,'deliveryDetails[i].carrierCode');
    i := i + 1;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkPrivateKey_Dispose(privKey);
CkHttpResponse_Dispose(resp);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;