(Delphi ActiveX) Refinitiv World-Check One - Get Top Level Groups

See more Refinitiv Examples

Sends a signed GET request to get the top level groups.

Note: This example requires Chilkat v9.5.0.89 or later.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
json: TChilkatJsonObject;
success: Integer;
http: TChilkatHttp;
responseJson: WideString;
jarr: TChilkatJsonArray;
jsonObj: IChilkatJsonObject;
id: WideString;
name: WideString;
parentId: WideString;
hasChildren: Integer;
status: WideString;
j: Integer;
count_j: Integer;
i: Integer;
count_i: Integer;

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

json := TChilkatJsonObject.Create(Self);

// Create the following JSON:
// 
// {
//   "keyId": "aaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
//   "hmacKey": "xxxxzI3vi58xxxCBxxx1+P/d8tGxx7KuLqN/KMPNxxxxekhj8/bx83+1YQSUxxxxYyv939ceY06GvhYRKmxxxx==",
//   "algorithm": "hmac-sha256",
//   "headers": [
//     "(request-target)",
//     "host",
//     "date"
//   ]
// }

// Substitute your actual API key and API secret in place of "api-key" and "api-secret"
json.UpdateString('keyId','api-key');
json.UpdateString('hmacKey','api-secret');
json.UpdateString('algorithm','hmac-sha256');
// Indicate the names of the headers to be included in the signature.
// "(request-target)" is not actually a header name, but is a special name for HTTP signatures.
// Copy the following three lines of code exactly as-is.  
// Do not replace "host", "date", or "(request-target)" with values.
json.UpdateString('headers[0]','(request-target)');
json.UpdateString('headers[1]','host');
json.UpdateString('headers[2]','date');

http := TChilkatHttp.Create(Self);

// Setting the AuthSignature property causes the following header to be computed and added:
// Authorization: Signature keyId="...", algorithm="hmac-sha256", headers="(request-target) host date", signature="..."
http.AuthSignature := json.Emit();

http.SetRequestHeader('Cache-Control','no-cache');

// Chilkat will auto-add the Date header because it's needed by the HTTP Signature.

responseJson := http.QuickGetStr('https://api-worldcheck.refinitiv.com/v2/groups');
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add(responseJson);
Memo1.Lines.Add('----');
// A 200 status code indicates success.
Memo1.Lines.Add('Status code = ' + IntToStr(http.LastStatus));

// Successful JSON looks like this:
// [ 
//   {
//   "id": "...",
//   "name": "Company Name",
//   "parentId": null,
//   "hasChildren": false,
//   "status": "ACTIVE",
//   "children": []
//   }
// ]

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

jarr := TChilkatJsonArray.Create(Self);

success := jarr.Load(responseJson);

i := 0;
count_i := jarr.Size;
while i < count_i do
  begin
    jsonObj := jarr.ObjectAt(i);
    id := jsonObj.StringOf('id');
    name := jsonObj.StringOf('name');
    parentId := jsonObj.StringOf('parentId');
    hasChildren := jsonObj.BoolOf('hasChildren');
    status := jsonObj.StringOf('status');
    j := 0;
    count_j := jsonObj.SizeOfArray('children');
    while j < count_j do
      begin
        jsonObj.J := j;
        j := j + 1;
      end;

    i := i + 1;
  end;
end;