(Delphi DLL) REST POST JSON using Gzip Content Encoding

Demonstrates how to send a JSON POST using the gzip Content-Encoding.

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
json: HCkJsonObject;
rest: HCkRest;
success: Boolean;
sbReq: HCkStringBuilder;
sbResp: HCkStringBuilder;
jsonResp: HCkJsonObject;

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

// Use the online tool at https://tools.chilkat.io/Default.cshtml
// to generate the JSON code that creates this JSON:

// {
//     "lists": [
//         {
//             "id": "1511199999"
//         }
//     ],
//     "confirmed": false,
//     "email_addresses": [
//         {
//             "email_address": "support@chilkatsoft.com"
//         }
//     ],
//     "first_name": "Matt",
//     "last_name": "Smith"
// }
// 

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'lists[0].id','1511199999');
CkJsonObject_UpdateBool(json,'confirmed',False);
CkJsonObject_UpdateString(json,'email_addresses[0].email_address','support@chilkatsoft.com');
CkJsonObject_UpdateString(json,'first_name','Matt');
CkJsonObject_UpdateString(json,'last_name','Smith');

rest := CkRest_Create();

success := CkRest_Connect(rest,'api.constantcontact.com',443,True,True);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

CkRest_AddHeader(rest,'Content-Type','application/json');
CkRest_AddHeader(rest,'Authorization','Bearer xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx');

// Tell the server you'll accept only an application/json response.
CkRest_AddHeader(rest,'Accept','application/json');

// Indicate that we'll be sending the request body gzipped.
CkRest_AddHeader(rest,'Content-Encoding','gzip');

sbReq := CkStringBuilder_Create();
CkJsonObject_EmitSb(json,sbReq);

// Send the POST.
sbResp := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'POST','/v2/contacts?action_by=ACTION_BY_VISITOR&api_key=xxxxxxx',sbReq,sbResp);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

Memo1.Lines.Add('Response body:');
Memo1.Lines.Add(CkStringBuilder__getAsString(sbResp));

if (CkRest_getResponseStatusCode(rest) <> 200) then
  begin
    Memo1.Lines.Add('Received error response code: ' + IntToStr(CkRest_getResponseStatusCode(rest)));
    Exit;
  end;

jsonResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jsonResp,sbResp);

// Use the online tool at https://tools.chilkat.io/jsonParse.cshtml
// to generate the JSON code that parses the JSON response..

CkJsonObject_Dispose(json);
CkRest_Dispose(rest);
CkStringBuilder_Dispose(sbReq);
CkStringBuilder_Dispose(sbResp);
CkJsonObject_Dispose(jsonResp);

end;