如何读取cookie?(包括建什么工程，如何测试，麻烦好事做到底)

[四十岁开始写程序]

如何读取cookie?
(包括建什么工程，
如何测试，麻烦好事做到底)

[zousoft]

http协议是非常强大的, 但它有个缺陷, 就是不能记忆. 解决办法就是使用cookie.
cookie实际上是一个字符串, 它的格式是"Name=Value", 客户可以拒绝接受cookie, 所以要考虑周全, 不要过于倚赖它.
TWebResponse的SetCookieField()和TWebRequest的CookieFields属性可以分别用来存取cookie.
SetCookieField(Values: TStrings; const ADomain, APath: string; AExpires: TDateTime; ASecure: Boolean);
Values是cookie的实际内容, 可以包括多个cookie.
ADomain和APath用来限制cookie作用的服务器域和路径.
AExpires用于指定cookie的生命期, cookie将在此日期后作废. 一般采取Now+天数的格式. 也可以通过设置一个过去的日期, 使cookie无效.
ASecure一般设为False.
使用实例: 用cookie纪录上次访问时间和访问总次数.
New -> Others -> WebServerApplication -> ISAPI/NSAPI Dynamic Link Library
新建一个Action, PathInfo设为mycookie并在其OnAction中加入如下代码:
procedure TWebModule1.WebModule1WebActionItem1Action(Sender: TObject;
Request: TWebRequest; Response: TWebResponse; var Handled: Boolean);
var
tmp: TStringList;
begin
Response.Content := Format('You have visited my web for %s times and the last time is %s.',
[Request.CookieFields.Values['Count'], Request.CookieFields.Values['Time']]);
tmp := TStringList.Create;
tmp.Add(Format('Count=%d', [strtoint(Request.CookieFields.Values['Count'])+1]));
tmp.Add(Format('Time=%s', [FormatDateTime('yyyy/mm/dd hh:mm:ss', Now)]));
Response.SetCookieField(tmp, 'your server', '', Now+30, False);
tmp.Free;
Handled := True;
end;
编译运行: http://<your server>/project1.dll/mycookie

[四十岁开始写程序]

实际上我的问题不是网络编程的问题，运行也不能采用: http://<your server>/project1.dll/mycookie
方式。
我在IE工具条上做了一个toolbar,我想让上面的按钮click事件读本机的cookie ,
我的问题是如何用 delphi 写了个单机版的程序，读本机的cookie.
还请大侠赐教。

[匪六哥]

搞了几天，终于有了点眉目，以下是我登录一个asp站点的delphi程序，使用了IDHttp控件和IDCookieManager控件，在delphi7（带indy9）＋win2k pro调试通过。

有不当之处请指正，如转载请注明作者：yannqi。

1、网站asp程序：
判断如果有cookie显示用户名和邮件；如果没有将获得的用户名和邮件写入cookie。
<%
if (request.Cookies("name")="" or request.Cookies("email")="") then

Response.Cookies("name") = request("name")
Response.Cookies("email") = request("email")
Response.write(request("name")+","+request("email")+",写入cookie")
else
Response.write("Name:"+request.Cookies("name"))
Response.write("<br>email:"+request.Cookies("email"))
end if
%>

2、delphi form
object Form1: TForm1
Left = 258
Top = 154
Width = 650
Height = 388
Caption = 'Form1'
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'MS Sans Serif'
Font.Style = []
OldCreateOrder = False
PixelsPerInch = 96
TextHeight = 13
object btnLogin: TButton
Left = 256
Top = 24
Width = 75
Height = 25
Caption = '提交'
TabOrder = 0
OnClick = btnLoginClick
end
object edtUserName: TLabeledEdit
Left = 0
Top = 24
Width = 121
Height = 21
EditLabel.Width = 50
EditLabel.Height = 13
EditLabel.Caption = 'UserName'
TabOrder = 1
Text = 'yannqi'
end
object edtPassword: TLabeledEdit
Left = 128
Top = 24
Width = 121
Height = 21
EditLabel.Width = 25
EditLabel.Height = 13
EditLabel.Caption = 'Email'
TabOrder = 2
Text = '[e-mail]'
end
object Memo1: TMemo
Left = 312
Top = 64
Width = 321
Height = 281
Lines.Strings = (
'Memo1')
TabOrder = 3
end
object Cookies: TMemo
Left = 8
Top = 64
Width = 297
Height = 281
Lines.Strings = (
'Cookies')
TabOrder = 4
end
object btnInfor: TButton
Left = 336
Top = 24
Width = 75
Height = 25
Caption = '测试'
TabOrder = 5
OnClick = btnInforClick
end
object Button3: TButton
Left = 416
Top = 24
Width = 43
Height = 25
Caption = '清空'
TabOrder = 6
OnClick = Button3Click
end
object http: TIdHTTP
MaxLineAction = maException
ReadTimeout = 0
AllowCookies = False
ProxyParams.BasicAuthentication = False
ProxyParams.ProxyPort = 0
Request.ContentLength = -1
Request.ContentRangeEnd = 0
Request.ContentRangeStart = 0
Request.ContentType = 'text/html'
Request.Accept = 'text/html, */*'
Request.BasicAuthentication = False
Request.UserAgent = 'Mozilla/3.0 (compatible; Indy Library)'
HTTPOptions = [hoForceEncodeParams]
CookieManager = CookieMngr
Left = 120
Top = 96
end
object CookieMngr: TIdCookieManager
Left = 152
Top = 96
end
end

3、unit1。pas
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls, IdCookieManager, IdBaseComponent,
IdComponent, IdTCPConnection, IdTCPClient, IdHTTP;

type
TForm1 = class(TForm)
http: TIdHTTP;
CookieMngr: TIdCookieManager;
edtUserName: TLabeledEdit;
edtPassword: TLabeledEdit;
btnLogin: TButton;
Cookies: TMemo;
Memo1: TMemo;
btnInfor: TButton;
Button3: TButton;
procedure btnLoginClick(Sender: TObject);
procedure btnInforClick(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}


procedure TForm1.btnLoginClick(Sender: TObject);
var
s, s1: TStringStream;
i: Integer;
begin
s := TStringStream.Create('');
s1 := TStringStream.Create('');
try
s.WriteString('name=' + edtUserName.Text + '&');
s.WriteString('email=' + edtPassword.Text);
http.Request.ContentType := 'application/x-www-form-urlencoded';

try
http.Post('http://localhost/cookietest.asp', s, s1)
except
http.Get(http.Response.Location, s1);
end;
//}
Memo1.Lines.Text := s1.DataString;
//下面的是显示cookies信息的代码
Cookies.Clear;
Cookies.Lines.Add(inttostr(CookieMngr.CookieCollection.Count));
for i := 0 to CookieMngr.CookieCollection.Count - 1 do
Cookies.Lines.Add(CookieMngr.CookieCollection.Items[i].CookieText);
finally
s.Free;
s1.Free;
end;

end;

procedure TForm1.btnInforClick(Sender: TObject);
var
s, s1: TStringStream;
i: Integer;
begin
s := TStringStream.Create('');
s1 := TStringStream.Create('');
try
http.Request.ContentType := 'application/x-www';
http.AllowCookies:=true;
try
http.Post('http://localhost/cookietest.asp', s, s1)
except
http.Get(http.Response.Location, s1);
end;
Memo1.Lines.Text := s1.DataString;
Cookies.Clear;
for i := 0 to CookieMngr.CookieCollection.Count - 1 do
Cookies.Lines.Add(CookieMngr.CookieCollection.Items[i].CookieText);
finally
s.Free;
s1.Free;
end;

end;

procedure TForm1.Button3Click(Sender: TObject);
begin
cookies.Clear;
Memo1.Clear;
end;

end.