namespace WWW.Controllers
{
public class UploadController : Controller
{
// GET: Upload
public void Index(string Filename)
{
//Create a stream for the file
Stream stream = null;
//This controls how many bytes to read at a time and send to the client
int bytesToRead = 10000;
// Buffer to read bytes in chunk size specified above
byte[] buffer = new Byte[bytesToRead];
string url = "http://admin-dev.nanya.bike.idv.tw/newnanyaback/Upload/" + Filename;
// The number of bytes read
try
{
//Create a WebRequest to get the file
HttpWebRequest fileReq = (HttpWebRequest)HttpWebRequest.Create(url);
//Create a response for this request
HttpWebResponse fileResp = (HttpWebResponse)fileReq.GetResponse();
if (fileReq.ContentLength > 0)
fileResp.ContentLength = fileReq.ContentLength;
//Get the Stream returned from the response
stream = fileResp.GetResponseStream();
// prepare the response to the client. resp is the client Response
var resp = HttpContext.Response;
if (Filename.ToLower().EndsWith(".png") ||
Filename.ToLower().EndsWith(".jpg") ||
Filename.ToLower().EndsWith(".jpeg") ||
Filename.ToLower().EndsWith(".gif")
)
{
resp.ContentType = "image";
}
else
{
//Indicate the type of data being sent
resp.ContentType = "application/octet-stream";
//Name the file
resp.AddHeader("Content-Disposition", "attachment; filename=\"" + HttpUtility.UrlEncode(Filename, Encoding.UTF8) + "\"");
}
resp.AddHeader("Content-Length", fileResp.ContentLength.ToString());
int length;
do
{
// Verify that the client is connected.
if (resp.IsClientConnected)
{
// Read data into the buffer.
length = stream.Read(buffer, 0, bytesToRead);
// and write it out to the response's output stream
resp.OutputStream.Write(buffer, 0, length);
// Flush the data
resp.Flush();
//Clear the buffer
buffer = new Byte[bytesToRead];
}
else
{
// cancel the download if client has disconnected
length = -1;
}
} while (length > 0); //Repeat until no data is read
}
finally
{
if (stream != null)
{
//Close the input stream
stream.Close();
}
}
}
}
}
<system.webServer>
<modules>
<remove name="UrlRoutingModule-4.0" />
<add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule" preCondition="" />
</modules>
</system.webServer><system.web>
<httpRuntime requestValidationMode="2.0" />
<pages validateRequest="false" />
</system.web>
後者比較算是正解 基本上處理掉 <script 我想 XSS 就解決一大半
在Web.config中<system.web>中加入
這段 <httpRuntime requestValidationMode="2.0" />就ok了!!!
造成的原因
是.NET 4.0跟2.0版本在請求驗證的定義不同:
ASP.NET Request Validation 請求驗證是ASP.NET提供來保護XSS攻擊的一項功能
在2.0 僅針對.aspx及class進行驗證…
但到了4.0,請求驗認範圍擴大到所有的請求…
而不是只有.aspx,還包含WebService呼叫以及自訂的http Handlers,都會去驗證http請求的內容…