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delphi 实现文件上传下载

作者:admin 来源:未知 日期:2010/5/20 13:38:49 人气: 标签:

delphi 实现文件上传下载
unit UpDownFile;

interface

uses
Windows, Classes, Idhttp, URLMon, IdMultipartFormData;

const UpUrl = 'http://127.0.0.1/upfile/upfile.asp';
const UpFileName = 'C:\Documents and Settings\Administrator\桌面\test\web.mdb';
const DownUrl = 'http://www.google.com/images/logo_sm.gif';
const DownFileName = 'web.gif';

type
TUpDownFile = class
private
FThreadID : DWord;
FHandle : THandle;
{ Private declarations }
public
constructor Create;
procedure UpFile;
procedure DownFile;
procedure Close;
end;

implementation

function UpFileEx(): string; stdcall;
var
MutPartForm: TIdMultiPartFormDataStream;
response: string;
FHttp: Tidhttp;
begin
FHttp := Tidhttp.Create(nil);
FHttp.HandleRedirects := true;
FHttp.AllowCookies := true;

MutPartForm := TIdMultiPartFormDataStream.Create;
MutPartForm.AddFormField('act', 'upload');
MutPartForm.AddFormField('upcount', '1');
MutPartForm.AddFormField('filepath', 'data');
MutPartForm.AddFormField('file1', 'filename="' + UpFileName + '"');
MutPartForm.AddFormField('Submit', 'Submit');
MutPartForm.AddFile('file1', UpFileName, 'text/plain');
try
response := FHttp.Post(UpUrl, MutPartForm);
//Messagebox(0, PAnsiChar(response), 'ca', MB_OK);
finally
MutPartForm.Free;
FHttp.Free;
end;
end;

function DownFileEx(): string; stdcall;
begin
UrlDownloadToFile(nil, PChar(DownUrl), PChar(DownFileName), 0, nil);
end;

constructor TUpDownFile.Create;
begin
//
end;

procedure TUpDownFile.UpFile;
begin
//FHandle := CreateThread(nil,0,@UpFileEx,nil,0,FThreadID);
UpFileEx;
end;

procedure TUpDownFile.DownFile;
begin
// FHandle := CreateThread(nil,0,@DownFileEx,nil,0,FThreadID);
DownFileEx;
end;

procedure TUpDownFile.Close;
begin
//ExitThread(FThreadID);
end;

end.
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