(Delphi DLL) Walmart - Get Inventory for an Item

Demonstrates how to get inventory for an item and parse the result.

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, Http, StringBuilder, Xml, AuthUtil, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
sbUrl: HCkStringBuilder;
success: Boolean;
numReplaced: Integer;
requestMethod: PWideChar;
authUtil: HCkAuthUtil;
wmConsumerId: PWideChar;
wmPrivateKey: PWideChar;
jsonStr: PWideChar;
json: HCkJsonObject;
http: HCkHttp;
xmlStr: PWideChar;
xml: HCkXml;
quantity: Integer;

begin
// ---------------------------------------------------------------------------------------------------------
// Note: This example is deprecated.  The Walmart API no longer uses the Signature method of authenticating.
// Walmart now uses OAuth2.  
// ---------------------------------------------------------------------------------------------------------

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

// Sends the following GET request:
// GET https://marketplace.walmartapis.com/v2/inventory?sku={SKU}

sbUrl := CkStringBuilder_Create();
success := CkStringBuilder_Append(sbUrl,'https://marketplace.walmartapis.com/v2/inventory?sku={SKU}');
numReplaced := CkStringBuilder_Replace(sbUrl,'{SKU}','HOPP~904~51041');

requestMethod := 'GET';

// First we need to generate a signature for our request.
// The signature needs to be re-generated for each new Walmart HTTP request.
authUtil := CkAuthUtil_Create();

wmConsumerId := 'WALMART_CONSUMER_ID';
wmPrivateKey := 'WALMART_PRIVATE_KEY';
jsonStr := CkAuthUtil__walmartSignature(authUtil,CkStringBuilder__getAsString(sbUrl),wmConsumerId,wmPrivateKey,requestMethod);
if (CkAuthUtil_getLastMethodSuccess(authUtil) <> True) then
  begin
    Memo1.Lines.Add(CkAuthUtil__lastErrorText(authUtil));
    Exit;
  end;

// The JSON returned by WalmartSignature contains the values to be used in the following
// header fields: WM_SEC.AUTH_SIGNATURE, WM_SEC.TIMESTAMP, and WM_QOS.CORRELATION_ID
json := CkJsonObject_Create();
CkJsonObject_Load(json,jsonStr);

http := CkHttp_Create();
CkHttp_SetRequestHeader(http,'WM_SVC.NAME','Walmart Marketplace');
CkHttp_SetRequestHeader(http,'WM_QOS.CORRELATION_ID',CkJsonObject__stringOf(json,'correlation_id'));
CkHttp_SetRequestHeader(http,'WM_SEC.TIMESTAMP',CkJsonObject__stringOf(json,'timestamp'));
CkHttp_SetRequestHeader(http,'WM_SEC.AUTH_SIGNATURE',CkJsonObject__stringOf(json,'signature'));
CkHttp_SetRequestHeader(http,'WM_CONSUMER.ID',wmConsumerId);
CkHttp_putAccept(http,'application/xml');

// Note: Do not explicitly set the "Host" header.  Chilkat will set it automatically.

xmlStr := CkHttp__quickGetStr(http,CkStringBuilder__getAsString(sbUrl));
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

xml := CkXml_Create();
CkXml_LoadXml(xml,xmlStr);

// A successful response should have a 200 response status
if (CkHttp_getLastStatus(http) <> 200) then
  begin
    Memo1.Lines.Add(CkXml__getXml(xml));
    Memo1.Lines.Add('Response Status Code: ' + IntToStr(CkHttp_getLastStatus(http)));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// A sample XML response is shown below..
Memo1.Lines.Add(CkXml__getXml(xml));
Memo1.Lines.Add('--');

// To get the quantity:
quantity := CkXml_GetChildIntValue(xml,'quantity|amount');
Memo1.Lines.Add('quantity = ' + IntToStr(quantity));

// ---------------------------------------
// Sample XML response
// ---------------------------------------

// <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
// <inventory xmlns="http://walmart.com/">
//     <sku>HOPP~904~51041</sku>
//     <quantity>
//         <unit>EACH</unit>
//         <amount>234</amount>
//     </quantity>
//     <fulfillmentLagTime>5</fulfillmentLagTime>
// </inventory>

CkStringBuilder_Dispose(sbUrl);
CkAuthUtil_Dispose(authUtil);
CkJsonObject_Dispose(json);
CkHttp_Dispose(http);
CkXml_Dispose(xml);

end;