protected static void CheckAndDownload(String file, String targetPath = null)
{
if (!Path.IsPathRooted(file))
{
if (!Runtime.IsWeb)
{
file = file.GetFullPath();
}
else
{
file = Path.Combine(HttpRuntime.BinDirectory, file);
}
}
if (File.Exists(file) && new FileInfo(file).Length > 0)
{
return;
}
// 目标目录
String dir = !String.IsNullOrEmpty(targetPath) ? targetPath : Path.GetDirectoryName(file);
// 从网上下载文件
var zipfile = Path.GetFileNameWithoutExtension(file);
try
{
#region 检测64位平台
var module = typeof(Object).Module;
PortableExecutableKinds kind;
ImageFileMachine machine;
module.GetPEKind(out kind, out machine);
if (machine != ImageFileMachine.I386)
{
zipfile += "64";
}
#endregion
zipfile += ".zip";
var url = String.Format(ServiceAddress, zipfile);
var sw = new Stopwatch();
sw.Start();
// 检查缓存文件，一个月内有效
var x = Path.Combine(Path.GetPathRoot(Environment.SystemDirectory), @"X");
var xfile = Path.Combine(x, zipfile);
var xf = new FileInfo(xfile);
if (CacheZip && File.Exists(xfile) && xf.Length > 0 && xf.LastWriteTime.AddMonths(1) > DateTime.Now)
{
zipfile = xfile;
}
else
{
// 目标Zip文件
zipfile = Path.Combine(dir, zipfile);
// Zip文件不存在，准备下载
if (!File.Exists(zipfile) || new FileInfo(zipfile).Length <= 0)
{
DAL.WriteLog("准备从{0}下载文件到{1}！", url, zipfile);
var client = new WebClientX(true, true);
// 同步下载，3秒超时
client.Timeout = 10000;
//var data = client.DownloadData(url);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
client.DownloadFile(url, zipfile);
client.Dispose();
}
if (CacheZip)
{
File.Copy(zipfile, xfile, true);
}
}
sw.Stop();
var size = new FileInfo(zipfile).Length;
DAL.WriteLog("下载{0}完成（{3:n0}字节），耗时{2}，准备解压到{1}！", zipfile, dir, sw.Elapsed, size);
//var ms = new MemoryStream(data);
//if (file.EndsWith("64")) file = file.Substring(0, file.Length - 2);
//IOHelper.DecompressFile(ms, dir, file, false);
ZipFile.Extract(zipfile, dir, true);
DAL.WriteLog("解压完成！");
}
catch (ZipException ex)
{
if (File.Exists(zipfile))
{
File.Delete(zipfile);
}
DAL.WriteLog("解压失败，删除压缩文件！{0}", ex.ToString());
}
catch (Exception ex)
{
DAL.WriteLog(ex.ToString());
}
}