根据 OpenAPI 契约构建 REST API，原生运行于 Delphi

uses
  sgcHTTP_REST_Server, sgcHTTP_REST_Server_Stats;
var
  RESTServer: TsgcHTTPRESTServer;
  Stats: TsgcHTTPServerStats;
begin
  // REST 服务器：一个组件即涵盖 CORS、健康检查/指标与多租户
  RESTServer := TsgcHTTPRESTServer.Create(nil);
  Stats := TsgcHTTPServerStats.Create(nil);
  Stats.Endpoints.Health.Enabled := True;

  RESTServer.Port := 8080;
  RESTServer.CORSOptions.Enabled := True;
  RESTServer.CORSOptions.AllowOrigins := 'https://app.example.com';
  RESTServer.ServerStats := Stats;
  RESTServer.OnCommandGet := RESTServerCommandGet;
  RESTServer.Active := True;
end;

procedure TForm1.RESTServerCommandGet(AContext: TIdContext;
  ARequestInfo: TIdHTTPRequestInfo; AResponseInfo: TIdHTTPResponseInfo);
begin
  AResponseInfo.ContentText := '{"status":"ok"}';
end;

uses
  sgcWebSocket_Server_API_OpenAPI, sgcHTTP_Server;
var
  OpenAPIServer: TsgcWSAPIServer_OpenAPI;
begin
  // OpenAPI 服务器：加载契约，按操作 id 分发
  OpenAPIServer := TsgcWSAPIServer_OpenAPI.Create(nil);
  OpenAPIServer.Server := sgcHTTPServer1;
  OpenAPIServer.LoadFromFile('petstore.yaml');
  OpenAPIServer.OnRequest := OpenAPIServerRequest;

  sgcHTTPServer1.Port := 8080;
  sgcHTTPServer1.Active := True;
end;

procedure TForm1.OpenAPIServerRequest(Sender: TObject;
  const aOperationId: string; const aContext: TsgcOpenAPIServerContext;
  var Handled: Boolean);
begin
  if aOperationId = 'getPetById' then
  begin
    aContext.RespondJSON(200,
      '{"id":"' + aContext.PathParamAsString('petId') + '","name":"Rex"}');
    Handled := True;
  end;
end;