[delphi]indy idhttp post方法

idhttp中对于post方法的定义：

    function Post(AURL: string; ASource: TIdStrings): string; overload;
    function Post(AURL: string; ASource: TStream): string; overload;
    function Post(AURL: string; ASource: TIdMultiPartFormDataStream): string; overload;
    procedure Post(AURL: string; ASource: TIdMultiPartFormDataStream; AResponseContent: TStream); overload;
    procedure Post(AURL: string; ASource: TIdStrings; AResponseContent: TStream); overload;
    procedure Post(AURL: string; ASource, AResponseContent: TStream); overload;

其中的基本方法是下面的过程类方法，其他post重载方法均为嵌套使用此方法：

procedure TIdCustomHTTP.Post(AURL: string; ASource, AResponseContent: TStream);

参数：

AURL: string 	// post请求URL
ASource: TIdMultiPartFormDataStream 	// TStream派生的类，其中为发送的流数据及mime信息，可用于上传文件
ASource: TStream 	// 发送的流数据
AResponseContent: TStream // 响应内容流ASource: TIdStrings // TString派生的类，用于向服务器提交数据

ASource 为TIdStrings的数据，使用的MIME是默认的“application/x-www-form-urlencoded”，而TIdMultiFormDataStream则是根据发送的内容/文件来设定MIME类型。

示例：

unit Umain;

interface

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

type
  TForm1 = class(TForm)
    IdHTTP1: TIdHTTP;
    Memo1: TMemo;
    btnOne: TButton;
    btnTwo: TButton;
    btnThree: TButton;
    btnFour: TButton;
    btnFive: TButton;
    btnSix: TButton;
    procedure btnOneClick(Sender: TObject);
    procedure btnTwoClick(Sender: TObject);
    procedure btnThreeClick(Sender: TObject);
    procedure btnFourClick(Sender: TObject);
    procedure btnFiveClick(Sender: TObject);
    procedure btnSixClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

const
  sPostUrl = 'http://cne./reg/mima-pass.asp?path=';

procedure TForm1.btnOneClick(Sender: TObject);
var
  postcmd : TStringList;
begin
  postcmd := TStringList.Create;  // 组合参数列表
  postcmd.Add('AutoGet=1');
  postcmd.Add('Logintype=0');
  postcmd.Add('password=test');
  postcmd.Add('username=test');
  Memo1.Text := IdHTTP1.Post(sPostUrl, postcmd);  // 以post的方式发送到服务器
end;

procedure TForm1.btnTwoClick(Sender: TObject);
var
  postStream : TStringStream;
begin
  IdHTTP1.Request.ContentType := 'application/x-www-form-urlencoded'; // 定义发送mime类型
  postStream := TStringStream.Create('AutoGet=1&Logintype=0&password=test&username=test');  // 发送内容
  Memo1.Text := IdHTTP1.Post(sPostUrl, postStream);
end;

procedure TForm1.btnThreeClick(Sender: TObject);
var
  postStream : TIdMultiPartFormDataStream;
begin
  IdHTTP1.HandleRedirects := true;  // 允许重定向，因为这个站点会发生重定向
  IdHTTP1.Request.Referer := 'http://www./'; // 设置来路，此网站要求

  postStream := TIdMultiPartFormDataStream.Create;  // 创建TIdMultiPartFormDataStream类

  postStream.AddFormField('textfield', 'd:\temp\test.png'); // 表单参数
  postStream.AddFile('uploaded_file', 'd:\temp\test.png', 'image/png'); // 表单文件
  Memo1.Text := Utf8ToAnsi(IdHTTP1.Post('http://www./s/upload.ashx', postStream));
end;

procedure TForm1.btnFourClick(Sender: TObject);
var
  postStream : TIdMultiPartFormDataStream;
  respStream : TStringStream;
begin
  IdHTTP1.HandleRedirects := true;  // 允许重定向，因为这个站点会发生重定向
  IdHTTP1.Request.Referer := 'http://www./'; // 设置来路，此网站要求

  postStream := TIdMultiPartFormDataStream.Create;  // 创建TIdMultiPartFormDataStream类
  respStream := TStringStream.Create('');

  postStream.AddFormField('textfield', 'd:\temp\test.png'); // 表单参数
  postStream.AddFile('uploaded_file', 'd:\temp\test.png', 'image/png'); // 表单文件

  IdHTTP1.Post('http://www./s/upload.ashx', postStream, respStream);

  Memo1.Text := Utf8ToAnsi(respStream.DataString);
end;

procedure TForm1.btnFiveClick(Sender: TObject);
var
  respStream : TStringStream;
  postcmd : TStringList;
begin
  postcmd := TStringList.Create;
  respStream := TStringStream.Create('');

  postcmd.Add('AutoGet=1');
  postcmd.Add('Logintype=0');
  postcmd.Add('password=test');
  postcmd.Add('username=test');

  IdHTTP1.Post(sPostUrl, postcmd, respStream);

  Memo1.Text := respStream.DataString;
end;

procedure TForm1.btnSixClick(Sender: TObject);
var
  postStream, respStream : TStringStream;
begin
  postStream := TStringStream.Create('AutoGet=1&Logintype=0&password=test&username=test');
  respStream := TStringStream.Create('');
  IdHTTP1.Request.ContentType := 'application/x-www-form-urlencoded'; // 定义发送mime类型
  IdHTTP1.Post(sPostUrl, postStream, respStream);

  Memo1.Text := respStream.DataString;
end;

end.

Demo下载：

http://download.csdn.net/detail/none01/5130108