Pascal (Lazarus/Delphi)

Amazon SP-API Create Feed Doc

See more Amazon SP-API Examples

Creates a feed document. Amazon returns a feedDocumentId value, encryption details, and a URL for uploading the feed contents. Pascal (Lazarus/Delphi)

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.AuthAws,
  Chilkat.Rest,
  Chilkat.JsonObject,
  Chilkat.StringBuilder;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  authAws: TAuthAws;
  rest: TRest;
  jsonToken: TJsonObject;
  lwa_token: string;
  jsonReq: TJsonObject;
  sbRequest: TStringBuilder;
  sbResponse: TStringBuilder;
  path: string;
  statusCode: Integer;
  json: TJsonObject;
  feedDocumentId: string;
  url: string;

begin
  success := False;

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

  authAws := TAuthAws.Create;
  authAws.AccessKey := 'AWS_ACCESS_KEY';
  authAws.SecretKey := 'AWS_SECRET_KEY';
  authAws.ServiceName := 'execute-api';
  //  Use the region that is correct for your needs.
  authAws.Region := 'eu-west-1';

  rest := TRest.Create;
  success := rest.Connect('sellingpartnerapi-eu.amazon.com',443,True,True);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  success := rest.SetAuthAws(authAws);

  //  Load the previously obtained LWA access token.
  //  See Fetch SP-API LWA Access Token
  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/sp_api_lwa_token.json');
  if (success = False) then
    begin
      WriteLn('Failed to load LWA access token.');
      Exit;
    end;

  //  Add the x-amz-access-token request header.
  lwa_token := jsonToken.StringOf('access_token');

  jsonReq := TJsonObject.Create;
  jsonReq.UpdateString('contentType','text/tab-separated-values; charset=UTF-8');

  sbRequest := TStringBuilder.Create;
  jsonReq.EmitSb(sbRequest);

  rest.ClearAllQueryParams();
  rest.ClearAllHeaders();
  rest.AddHeader('x-amz-access-token',lwa_token);

  sbResponse := TStringBuilder.Create;
  path := '/feeds/2021-06-30/documents';
  success := rest.FullRequestSb('POST',path,sbRequest,sbResponse);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  Examine the response status.
  statusCode := rest.ResponseStatusCode;
  WriteLn('statusCode: ' + statusCode);

  if (statusCode <> 201) then
    begin
      WriteLn('Response status text: ' + rest.ResponseStatusText);
      WriteLn('Response body: ');
      WriteLn(sbResponse.GetAsString());
      WriteLn('Failed.');
      Exit;
    end;

  WriteLn(sbResponse.GetAsString());

  //  If successful, gets a JSON response such as the following:

  //  {
  //    "feedDocumentId": "3d4e42b5-1d6e-44e8-a89c-2abfca0625bb",
  //    "url": "https://d34o8swod1owfl.cloudfront.net/Feed_101__POST_PRODUCT_DATA_.xml"
  //  }

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

  json := TJsonObject.Create;

  json.LoadSb(sbResponse);

  feedDocumentId := json.StringOf('feedDocumentId');
  url := json.StringOf('url');

  //  Save the JSON to a file for the example that uploads the feed..
  success := json.WriteFile('qa_data/json/sp_api_feed_upload_info.json');

  WriteLn('Success!');


  authAws.Free;
  rest.Free;
  jsonToken.Free;
  jsonReq.Free;
  sbRequest.Free;
  sbResponse.Free;
  json.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.