新建Webbroker项目：

选择类型：

开始可以使用：Indy VCL Application 方便调试，完成后，再新建一个DLL 项目，引用业务单元。

示例代码如下：

unit uDataModuleMain;

interface

uses
  SysUtils, Classes, HTTPApp, HTTPProd;

type
  TWebModule2 = class(TWebModule)
    ppTest: TPageProducer;
    procedure ppTestHTMLTag(Sender: TObject; Tag: TTag; const TagString: string;
      TagParams: TStrings; var ReplaceText: string);
    procedure WebModule2DefaultHandlerAction(Sender: TObject;
      Request: TWebRequest; Response: TWebResponse; var Handled: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  WebModuleClass: TComponentClass = TWebModule2;

implementation

{$R *.dfm}

procedure TWebModule2.ppTestHTMLTag(Sender: TObject; Tag: TTag;
  const TagString: string; TagParams: TStrings; var ReplaceText: string);
begin
    Response.ContentType := 'text/html;charset="utf-8"';
      try
      if SameText(TagString, 'doctitle') then  // TPageProducer组件的标记处理，指定 HTMLDoc 属性 ，标记格式 <#flag>
        ReplaceText := dm.GetTitle
      else if SameText(TagString, 'docbody') then
        ReplaceText := dm.GetBody
      else
        ReplaceText := '';
    except
      on E: Exception do
      begin
        ReplaceText := Format('ERROR! &lt;#%s&gt; raised %s: %s',
          [TagString, E.ClassName, E.Message])
      end
    end;
end;

procedure TWebModule2.WebModule2DefaultHandlerAction(Sender: TObject;
  Request: TWebRequest; Response: TWebResponse; var Handled: Boolean);
begin
    Response.ContentType := 'text/html;charset="utf-8"';   //指定编码
    Response.Content := 'WEB服务运行正常. ' + DateTimeToStr(Now);

    // Request.QueryFields.Values['sid'];  //查询参数获取

end;
end.