uses
URLMon, ShellApi;
function DownloadFile(SourceFile, DestFile: string): Boolean;
begin
try
Result := UrlDownloadToFile(nil, PChar(SourceFile), PChar(DestFile), 0, nil) = 0;
except
Result := False;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
const
// URL Location
SourceFile = 'http://www.google.com/intl/de/images/home_title.gif';
// Where to save the file
DestFile = 'c:\temp\google-image.gif';
begin
if DownloadFile(SourceFile, DestFile) then
begin
ShowMessage('Download succesful!');
// Show downloaded image in your browser
ShellExecute(Application.Handle, PChar('open'), PChar(DestFile),
PChar(''), nil, SW_NORMAL)
end
else
ShowMessage('Error while downloading ' + SourceFile)
end;
// Minimum availability: Internet Explorer 3.0
// Minimum operating systems Windows NT 4.0, Windows 95
******************************
2.}
uses
Wininet;
function DownloadURL(const aUrl: string): Boolean;
var
hSession: HINTERNET;
hService: HINTERNET;
lpBuffer: array[0..1024 + 1] of Char;
dwBytesRead: DWORD;
begin
Result := False;
// hSession := InternetOpen( 'MyApp', INTERNET_OPEN_TYPE_DIRECT, nil, nil, 0);
hSession := InternetOpen('MyApp', INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
try
if Assigned(hSession) then
begin
hService := InternetOpenUrl(hSession, PChar(aUrl), nil, 0, 0, 0);
if Assigned(hService) then
try
while True do
begin
dwBytesRead := 1024;
InternetReadFile(hService, @lpBuffer, 1024, dwBytesRead);
if dwBytesRead = 0 then break;
lpBuffer[dwBytesRead] := #0;
Form1.Memo1.Lines.Add(lpBuffer);
end;
Result := True;
finally
InternetCloseHandle(hService);
end;
end;
finally
InternetCloseHandle(hSession);
end;
end;
******************************
在Delphi中如何从网络中提取一个文件到本地计算机中,如提取<BR> http://www.abcdefg.com/software/a.zip到本地指定的目录中?
在窗体中添加1个TNMHTTP控件(在FastNet页)然后在随便那个Button什么的下面
加入如下代码:
NMHTTP1.InputFileMode := ture;
NMHTTP1.Body := '本地文件名';
NMHTTP1.Header := 'Head.txt';
NMHTTP1.OutputFileMode := FALSE;
NMHTTP1.ReportLevel := Status_Basic;
NMHTTP1.Proxy := '代理服务器的IP地址';
NMHTTP1.ProxyPort := '代理服务器的端口号';
With NMHTTP1.HeaderInfo do
Begin
Cookie := '';
LocalMailAddress := '';
LocalProgram := '';
Referer := '';
UserID := '用户名称';
Password := '用户口令';
End;
NMHTTP1.Get('http://www.abcdefg.com/software/a.zip');
试试吧,Delphi的\demos\FastNet\Http目录中有TNMHTTP控件的例子。
NT4+,Win95+,IE3+,你可以用URL Moniker的功能。
uses URLMon;
...
OleCheck(URLDownloadToFile(nil,'URL','Filename',0,nil));
其中最后一个参数你还可以传入一个IBindStatusCallback的实现以跟踪下载进度或控制中止下载。简单的场合一句话就搞定了。
--回复得分 0--
BTW, URL Moniker封装了大多数URL,而不是像NMHTTP那样封装协议,因此你可以用URLDownloadToFile下载HTTP,FTP甚至本地文件和局域网文件,还有其他的custom moniker,比如MSITSTORE(MSDN Library的文档moniker实现)。