Delphi DLL

Read the REST Response Body into a StringBuilder

Demonstrates Rest.ReadRespSb, which reads the response body as text into a StringBuilder, replacing its previous contents.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

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Delphi DLL

var
success: Boolean;
rest: HCkRest;
bTls: Boolean;
bAutoReconnect: Boolean;
statusCode: Integer;
sbResponse: HCkStringBuilder;
responseBody: PWideChar;

begin
success := False;

rest := CkRest_Create();
bTls := True;
bAutoReconnect := True;
success := CkRest_Connect(rest,'example.com',443,bTls,bAutoReconnect);
if (success = False) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

success := CkRest_SendReqNoBody(rest,'GET','/api/items/123');
if (success = False) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

statusCode := CkRest_ReadResponseHeader(rest);
if (statusCode < 0) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

//  Read the response body as text into a StringBuilder, replacing its previous contents.
sbResponse := CkStringBuilder_Create();
success := CkRest_ReadRespSb(rest,sbResponse);
if (success = False) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

responseBody := CkStringBuilder__getAsString(sbResponse);
if (CkStringBuilder_getLastMethodSuccess(sbResponse) = False) then
  begin
    Memo1.Lines.Add(CkStringBuilder__lastErrorText(sbResponse));
    Exit;
  end;
Memo1.Lines.Add(responseBody);

CkRest_Dispose(rest);
CkStringBuilder_Dispose(sbResponse);