XE3随笔17：实例 - 模拟 Google 搜索

本例测试效果图:

代码文件:

unit Unit1;

interface

uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;

type

  TForm1 = class(TForm)

    Memo1: TMemo;

    Edit1: TEdit;

    Button1: TButton;

    procedure Button1Click(Sender: TObject);

  end;

var

  Form1: TForm1;

implementation

{$R *.dfm}

uses MsXML, SuperObject;

//这是将字符串转换成 UTF 编码的函数, 这里用于 Google 的搜索地址
function ToUTF8Encode(str: string): string;
var

  b: Byte;
begin

  for b in BytesOf(UTF8Encode(str)) do

    Result := Format('%s%s%.2x', [Result, '%', b]);
end;

//这是给 ISuperObject 准备的方法
procedure Proc(const This, Params: ISuperObject; var Result: ISuperObject);
var

  jo: ISuperObject;
begin

  Form1.Memo1.Clear;

  for jo in Params['responseData.results'] do with Form1.Memo1.Lines do

  begin

    Add(jo.Format('%titleNoFormatting%:'));

    Add(jo.Format('%unescapedUrl%'));

    Add(EmptyStr);

  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
const

  u = 'http://www.google.cn/uds/GwebSearch?callback=response&rsz=large&v=1.0&q=';
var

  jo: ISuperObject;

  req: IXMLHTTPRequest;

  url: WideString;
begin

  jo := SO;

  jo.M['response'] := @Proc; {搜索结果将是类似 response(...) 函数格式的字符串}

  url := u + ToUTF8Encode(Edit1.Text); {准备搜索地址}

  //搜索

  req := CoXMLHTTP.Create;

  req.open('Get', url, False, EmptyParam, EmptyParam);

  req.send(EmptyParam);

  //搜索结果在 req.responseText(后付其全部内容), 下面语句将调用上面的 Proc 过程.

  jo[req.responseText]; {这是在本系列"方法"一节用到的第二种调用方法}
end;

end.

窗体文件:

object Form1: TForm1

  Left =

  Top =

  Caption = 'Form1'

  ClientHeight =

  ClientWidth =

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  PixelsPerInch =

  TextHeight =

  object Memo1: TMemo

    Left =

    Top =

    Width =

    Height =

    Align = alLeft

    Lines.Strings = (

      'Memo1')

    ScrollBars = ssBoth

    TabOrder =

    ExplicitHeight =

  end

  object Button1: TButton

    Left =

    Top =

    Width =

    Height =

    Caption = 'Button1'

    TabOrder =

    OnClick = Button1Click

  end

  object Edit1: TEdit

    Left =

    Top =

    Width =

    Height =

    TabOrder =

    Text = 'Delphi'

  end
end

下面是我以 "Delphi" 为关键字搜索返回的 responseText, 可以做个搜索工具了:

response(
{
"responseStatus": 200,
"responseData": {
"cursor": {
"pages": [
{
"label": 1,
"start": "0"
},{
"label": 2,
"start": "8"
},{
"label": 3,
"start": "16"
},{
"label": 4,
"start": "24"
},{
"label": 5,
"start": "32"
},{
"label": 6,
"start": "40"
},{
"label": 7,
"start": "48"
},{
"label": 8,
"start": "56"
}],
"currentPageIndex": 0,
"estimatedResultCount": "6050000",
"moreResultsUrl": "http:\/\/www.google.cn\/search?oe=utf8&ie=utf8&source=uds&start=0&hl=zh-CN&q=Delphi"
},
"results": [
{
"titleNoFormatting": "『Delphi园地』-源码,控件,文档,工具,免费下载,建设专业Delphi资源平台",
"url": "http:\/\/www.delphifans.com\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:gxlSlu0OTqQJ:www.delphifans.com",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "www.delphifans.com",
"content": "提供Delhpi技巧文章、源码、控件、文档、工具等。",
"title": "『Delphi<\/b>园地』-源码,控件,文档,工具,免费下载,建设专业Delphi<\/b>资源平台",
"unescapedUrl": "http:\/\/www.delphifans.com\/"
},{
"titleNoFormatting": "Delphi - *，*的百科全书",
"url": "http:\/\/zh.wikipedia.org\/wiki\/Delphi",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:KPWnJZ_ZuuQJ:zh.wikipedia.org",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "zh.wikipedia.org",
"content": "Delphi<\/b>，是Windows平台下的著名快速应用程序开发工具(Rapid Application Development ，简称RAD)。它的前身是在DOS下的产品BorlandTurbo Pascal，最早的版本由 ...<\/b>",
"title": "Delphi<\/b> - *，*的百科全书",
"unescapedUrl": "http:\/\/zh.wikipedia.org\/wiki\/Delphi"
},{
"titleNoFormatting": "DELPHI盒子- Delphi源代码控件文档工具下载",
"url": "http:\/\/www.2ccc.com\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:CF650RgvoJkJ:www.2ccc.com",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "www.2ccc.com",
"content": "DELPHI<\/b>源代码、组件、例子、演示及相关工具下载，文档发布，全站包含论坛，笔记等功能，每天更新。",
"title": "DELPHI<\/b>盒子- Delphi<\/b>源代码控件文档工具下载",
"unescapedUrl": "http:\/\/www.2ccc.com\/"
},{
"titleNoFormatting": "编程中国>> 技术教程>> 开发语言>> Delphi",
"url": "http:\/\/www.bccn.net\/Article\/kfyy\/delphi\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:vjiBcr2xV14J:www.bccn.net",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "www.bccn.net",
"content": "普通文章, 第二章Delphi<\/b>面向对象的编程方法（一）, 06-25. 普通文章 ...<\/b> 普通文章, 用 Delphi<\/b>制作以浏览器为界面的应用程序, 08-30. 普通文章, Delphi<\/b> 中串口通讯的实现 ...<\/b>",
"title": "编程中国>> 技术教程>> 开发语言>> Delphi<\/b>",
"unescapedUrl": "http:\/\/www.bccn.net\/Article\/kfyy\/delphi\/"
},{
"titleNoFormatting": "Delphi is a leading global supplier for the automotive, computing ...",
"url": "http:\/\/www.delphi.com\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:r5kD35m3Ns0J:www.delphi.com",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "www.delphi.com",
"content": "Supplier of audio systems, modules, and components to manufacturers and replacement parts to the after market worldwide.",
"title": "Delphi<\/b> is a leading global supplier for the automotive, computing ...<\/b>",
"unescapedUrl": "http:\/\/www.delphi.com\/"
},{
"titleNoFormatting": "delphi 窑洞",
"url": "http:\/\/www.51delphi.com\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:Kgv5hBXmSFgJ:www.51delphi.com",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "www.51delphi.com",
"content": "基于Delphi<\/b> 的Rich Internet Application开发和应用平台。 ...<\/b> 61449, Delphi<\/b> 7的 Property OldCreateOrder does not exist(1786字节), javer007, 2009-10-12 14:42:48 ...<\/b>",
"title": "delphi<\/b> 窑洞",
"unescapedUrl": "http:\/\/www.51delphi.com\/"
},{
"titleNoFormatting": "delphi专栏_软件开发_最专业的程序开发网站_开发者网络_软件_天极网",
"url": "http:\/\/dev.yesky.com\/ysdevdelphi\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:j-qd-w9ESrwJ:dev.yesky.com",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "dev.yesky.com",
"content": "在Delphi<\/b>数据库应用系统的数据录入过程中，有些数据是保存在Excel中的；有些是保存 ...<\/b> 为了便于开发数据库应用程序，在Delphi<\/b>集成开发环境中，提供了大量的数据库工具 ...<\/b>",
"title": "delphi<\/b>专栏_软件开发_最专业的程序开发网站_开发者网络_软件_天极网",
"unescapedUrl": "http:\/\/dev.yesky.com\/ysdevdelphi\/"
},{
"titleNoFormatting": "Delphi俱乐部",
"url": "http:\/\/www.tommstudio.com\/",
"cacheUrl": "http:\/\/www.google.com\/search?q=cache:9JQ4L48RA1QJ:www.tommstudio.com",
"GsearchResultClass": "GwebSearch",
"visibleUrl": "www.tommstudio.com",
"content": "dephi俱乐部,c#,delphi<\/b>,delphi<\/b>控件,delphi<\/b>源码,delphi<\/b>书籍,商业源码,程序开发,源码交易,开发,方案, ...<\/b> Net,Java,PowerBuilder,PHP,ASP,PERL 免费源码下载,Delphi<\/b>俱乐部 .",
"title": "Delphi<\/b>俱乐部",
"unescapedUrl": "http:\/\/www.tommstudio.com\/"
}]
},
"responseDetails": null
}
)