对C#使用ICSharpCode.SharpZipLib,我如何验证传递的文件实际上是一个有效的zip文件(不是右键单击并重命名为.zip的东西)？
[HttpPost]
public ActionResult Upload(HttpPostedFileBase fileData)
{
if (fileData != null && fileData.ContentLength > 0)
{
if (Path.GetExtension(fileData.FileName) == ".zip")
{
var zipFile = Server.MapPath("~/Content/uploads/" + Path.GetFileName(fileData.FileName));
fileData.SaveAs(zipFile);
FileStream fs = System.IO.File.OpenRead(zipFile);
ZipFile zf = new ZipFile(fs);
foreach (ZipEntry zipEntry in zf)
{
if (zipEntry.Name.EndsWith(".htm") || zipEntry.Name.EndsWith(".html"))
{
return Json(new { success = true });
}
}
fs.Close();
fs.Dispose();
System.IO.File.Delete(zipFile);
}
else
{
var fileName = Server.MapPath("~/Content/uploads/" + Path.GetFileName(fileData.FileName));
fileData.SaveAs(fileName);
return Json(new { success = true });
}
}
return Json(new { success = false });
}
解决方法
您可以使用ZipFile.TestArchive方法.以下是在SharpZipLib中声明它的方式：
/// <summary>
/// Test an archive for integrity/validity
/// </summary>
/// <param name="testData">Perform low level data Crc check</param>
/// <returns>true if all tests pass,false otherwise</returns>
/// <remarks>Testing will terminate on the first error found.</remarks>
public bool TestArchive(bool testData)
{
return TestArchive(testData,TestStrategy.FindFirstError,null);
}
用法示例：
ZipFile zipFile = new ZipFile("archive.zip");
Console.WriteLine("Archive validation result: {0}",zipFile.TestArchive(true));
