<system.web>
<httpRuntime requestValidationMode="2.0" maxRequestLength="1024000"/>
</system.web>
public string UploadFilesToRemoteUrl(string url, string[] files, NameValueCollection formFields = null)
{
string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "multipart/form-data; boundary=" +
boundary;
request.Method = "POST";
request.KeepAlive = true;
Stream memStream = new System.IO.MemoryStream();
var boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" +
boundary + "\r\n");
var endBoundaryBytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" +
boundary + "--");
string formdataTemplate = "\r\n--" + boundary +
"\r\nContent-Disposition: form-data; name=\"{0}\";\r\n\r\n{1}";
if (formFields != null)
{
foreach (string key in formFields.Keys)
{
string formitem = string.Format(formdataTemplate, key, formFields[key]);
byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
memStream.Write(formitembytes, 0, formitembytes.Length);
}
}
string headerTemplate =
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n";
for (int i = 0; i < files.Length; i++)
{
memStream.Write(boundarybytes, 0, boundarybytes.Length);
var header = string.Format(headerTemplate, "uplTheFile", files[i]);
var headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes, 0, headerbytes.Length);
using (var fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read))
{
var buffer = new byte[1024];
var bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
Response.Write("bytesRead: " + bytesRead.ToString() + "<br>");
memStream.Write(buffer, 0, bytesRead);
}
}
}
memStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
request.ContentLength = memStream.Length;
using (Stream requestStream = request.GetRequestStream())
{
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
}
try
{
using (var response = request.GetResponse())
{
Stream stream2 = response.GetResponseStream();
StreamReader reader2 = new StreamReader(stream2);
return reader2.ReadToEnd();
}
}
catch (Exception ex)
{
return (ex.ToString());
throw;
}
}
<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…
A potentially dangerous Request.Form value was detected from the client (ContentBody_txtContent="<style type="text/cs...").
.aspx新增了<%@ Page validateRequest="false"%>
最後找到還需要在web.config裡面新增<httpRuntime requestValidationMode="2.0" />
相關專案: SINGTEX