用 API 提取、写入指定网站的 Cookie 回复 "bangrj" 的问题

问题来源: http://www.cnblogs.com/del/archive/2009/02/27/1399526.html#1463307

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本例效果图:

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代码文件:

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses WinInet;

const url = 'http://www.sohu.com';

procedure TForm1.Button1Click(Sender: TObject);
var
  buf: array[0..1024*4-1] of Char;
  size: DWORD;
begin
  InternetGetCookie(PChar(url), nil, buf, size);
  ShowMessage(buf);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  buf: array[0..255] of Char;
  size: DWORD;
begin
  InternetGetCookie(PChar(url), 'YYID', buf, size);
  ShowMessage(buf);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  InternetSetCookie(PChar(url), 'WanYi', '1234567');
end;

procedure TForm1.Button4Click(Sender: TObject);
var
  buf: array[0..255] of Char;
  size: DWORD;
begin
  InternetGetCookie(PChar(url), 'WanYi', buf, size);
  ShowMessage(buf);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Button1.Caption := '提取指定网站 Cookie 的全部数据';
  Button2.Caption := '提取指定网站 Cookie 中的指定数据';
  Button3.Caption := '向指定网站写入 Cookie';
  Button4.Caption := '再提取刚写入的 Cookie';
end;

end.

窗体文件:

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object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 146
  ClientWidth = 328
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  Position = poDesktopCenter
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 48
    Top = 8
    Width = 233
    Height = 25
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 48
    Top = 39
    Width = 233
    Height = 25
    Caption = 'Button2'
    TabOrder = 1
    OnClick = Button2Click
  end
  object Button3: TButton
    Left = 48
    Top = 80
    Width = 233
    Height = 25
    Caption = 'Button3'
    TabOrder = 2
    OnClick = Button3Click
  end
  object Button4: TButton
    Left = 48
    Top = 111
    Width = 233
    Height = 25
    Caption = 'Button4'
    TabOrder = 3
    OnClick = Button4Click
  end
end