用了FCKeditor以后才知道,在性能上确实是挺优越的,特别是在加载的速度上,远比其它的编辑器要来得快,而且跨语言跨平台,也不会像FreeTextBox那样在页面中加入一大堆的ViewState视图状态代码,减轻了页面文件的重量,提高了加载速度.
编辑器本身也内置了文件上传功能,但他却不对文件的类型以及大小做出限制,以至于带有安全忧患,万一给人上传了一个木马或者一个上面兆的影片文件怎么办,当然,修改*config.js文件可以解决,但似乎存在着某方面的安全隐患吧.
由于FCKeditor本身是开源的,所以我可以对里面的某些代码进行修改.
首先是对FileWorkerBase.cs基类的修改
using System;
namespace FredCK.FCKeditorV2
{
public abstract class FileWorkerBase : System.Web.UI.Page
{
private const string DEFAULT_USER_FILES_PATH = "/UserFiles/";
private const string DEFAULT_USER_FILES_UPLOADTYPE = ".jpg.jpeg.bmp.gif.png.zip.rar.swf.";//默认允许上传文件类型
private const int DEFAULT_USER_FILES_UPLOADSIZE = 1024;//默认允许上传文件大小(1024KB)
private string sUserFilesPath;
private string sUserFilesDirectory;
private string sUserUploadType;
private int iUserUploadSize = 0;
protected string UserFilesPath
{
get
{
if (sUserFilesPath == null)
{
// Try to get from the "Application".
sUserFilesPath = (string)Application["FCKeditor:UserFilesPath"];
// Try to get from the "Session".
if (sUserFilesPath == null || sUserFilesPath.Length == 0)
{
sUserFilesPath = (string)Session["FCKeditor:UserFilesPath"];
// Try to get from the Web.config file.
if (sUserFilesPath == null || sUserFilesPath.Length == 0)
{
sUserFilesPath = System.Web.Configuration.WebConfigurationManager.AppSettings["FCKeditor:UserFilesPath"];
// Otherwise use the default value.
if (sUserFilesPath == null || sUserFilesPath.Length == 0)
sUserFilesPath = DEFAULT_USER_FILES_PATH;
// Try to get from the URL.
if (sUserFilesPath == null || sUserFilesPath.Length == 0)
{
sUserFilesPath = Request.QueryString["ServerPath"];
}
}
}
// Check that the user path ends with slash ("/")
if (!sUserFilesPath.EndsWith("/"))
sUserFilesPath += "/";
}
return sUserFilesPath;
}
}
/**//// <summary>
/// The absolution path (server side) of the user files directory. It
/// is based on the <see cref="FileWorkerBase.UserFilesPath"/>.
/// </summary>
protected string UserFilesDirectory
{
get
{
if (sUserFilesDirectory == null)
{
// Get the local (server) directory path translation.
sUserFilesDirectory = Server.MapPath(this.UserFilesPath);
}
return sUserFilesDirectory;
}
}
/**//// <summary>
/// 获取允许上传的类型
/// </summary>
protected string UserUploadType
{
get
{
if (sUserUploadType == null)
{
// Try to get from the "Application".
sUserUploadType = (string)Application["FCKeditor:UserUploadType"];
// Try to get from the "Session".
if (sUserUploadType == null || sUserUploadType.Length == 0)
{
sUserUploadType = (string)Session["FCKeditor:UserUploadType"];
// Try to get from the Web.config file.
if (sUserUploadType == null || sUserUploadType.Length == 0)
{
sUserUploadType = System.Web.Configuration.WebConfigurationManager.AppSettings["FCKeditor:UserUploadType"];
// Otherwise use the default value.
if (sUserUploadType == null || sUserUploadType.Length == 0)
sUserUploadType = DEFAULT_USER_FILES_UPLOADTYPE;
}
}
// Check that the user path starts and ends with slash (".")
if (!sUserUploadType.StartsWith("."))
sUserUploadType = "." + sUserUploadType;
if (!sUserUploadType.EndsWith("."))
sUserUploadType += ".";
}
return sUserUploadType;
}
}
/**//// <summary>
/// 获取允许上传的文件最大限制
/// </summary>
protected int UserUploadSize
{
get
{
if (iUserUploadSize < 1)
{
iUserUploadSize = Convert.ToInt32(Application["FCKeditor:UserUploadSize"]);
if (iUserUploadSize < 1)
{
iUserUploadSize = Convert.ToInt32(Session["FCKeditor:UserUploadSize"]);
if (iUserUploadSize < 1)
{
iUserUploadSize = Convert.ToInt32(System.Web.Configuration.WebConfigurationManager.AppSettings["FCKeditor:UserUploadSize"]);
if (iUserUploadSize < 1)
{
iUserUploadSize = DEFAULT_USER_FILES_UPLOADSIZE;
}
}
}
}
return iUserUploadSize;
}
}
}
}
接着就是对点击"浏览服务器"页面的上传部分的修改
以下是对FileBrowserConnector.cs中的FileUpload()函数的修改
private void FileUpload(string resourceType, string currentFolder)
{
HttpPostedFile oFile = Request.Files["NewFile"];
string sErrorNumber = "0";
string sFileName = "";
if (oFile != null && oFile.ContentLength > 0)
{
// Map the virtual path to the local server path.
string sServerDir = this.ServerMapFolder(resourceType, currentFolder);
/**//*
// Get the uploaded file name.
sFileName = System.IO.Path.GetFileName( oFile.FileName ) ;
int iCounter = 0 ;
while ( true )
{
string sFilePath = System.IO.Path.Combine( sServerDir, sFileName ) ;
if ( System.IO.File.Exists( sFilePath ) )
{
iCounter++ ;
sFileName =
System.IO.Path.GetFileNameWithoutExtension( oFile.FileName ) +
"(" + iCounter + ")" +
System.IO.Path.GetExtension( oFile.FileName ) ;
sErrorNumber = "201" ;
}
else
{
oFile.SaveAs( sFilePath ) ;
break ;
}
}
*/
if (this.UserUploadType.ToLower().IndexOf(System.IO.Path.GetExtension(oFile.FileName).ToLower() + ".") > -1)//检测是否为允许的上传文件类型
{
if (this.UserUploadSize * 1024 >= oFile.ContentLength)//检测文件大小是否超过限制
{
sFileName = DateTime.Now.ToString("yyyyMMddHHmmssffff") + System.IO.Path.GetExtension(oFile.FileName);
string sFilePath = System.IO.Path.Combine(sServerDir, sFileName);
oFile.SaveAs(sFilePath);
}
else//文件大小超过限制
{
Response.Clear();
Response.Write("<script type="text/javascript">");
Response.Write("window.parent.frames['frmUpload'].OnUploadCompleted(1,'上传文件大小超出限制') ;");
Response.Write("</script>");
Response.End();
}
}
else //文件类型不允许上传
{
Response.Clear();
Response.Write("<script type="text/javascript">");
Response.Write("window.parent.frames['frmUpload'].OnUploadCompleted(1,'上传文件类型不允许') ;");
Response.Write("</script>");
Response.End();
}
}
else
sErrorNumber = "202";
Response.Clear();
Response.Write("<script type="text/javascript">");
Response.Write("window.parent.frames['frmUpload'].OnUploadCompleted(" + sErrorNumber + ",'" + sFileName.Replace("'", "\'") + "') ;");
Response.Write("</script>");
Response.End();
}
最后就是对Uploader.cs类中的OnLoad()函数的修改
protected override void OnLoad(EventArgs e)
{
// Get the posted file.
HttpPostedFile oFile = Request.Files["NewFile"];
// Check if the file has been correctly uploaded
if (oFile == null || oFile.ContentLength == 0)
{
SendResults(202);
return;
}
int iErrorNumber = 0;
string sFileUrl = "";
string sFileName = "";
//使用原文件名上传代码,如果文件名相同,则在后面加上标号(1)(2)
/**//*
// Get the uploaded file name.
string sFileName = System.IO.Path.GetFileName( oFile.FileName ) ;
int iCounter = 0 ;
while ( true )
{
string sFilePath = System.IO.Path.Combine( this.UserFilesDirectory, sFileName ) ;
if ( System.IO.File.Exists( sFilePath ) )
{
iCounter++ ;
sFileName =
System.IO.Path.GetFileNameWithoutExtension( oFile.FileName ) +
"(" + iCounter + ")" +
System.IO.Path.GetExtension( oFile.FileName ) ;
iErrorNumber = 201 ;
}
else
{
oFile.SaveAs( sFilePath ) ;
sFileUrl = this.UserFilesPath + sFileName ;
break ;
}
}
*/
//使用原文件名上传代码结束
//使用时间作为流水号文件名
if (this.UserUploadSize * 1024 >= oFile.ContentLength)//检测文件大小是否超过限制
{
sFileName = DateTime.Now.ToString("yyyyMMddHHmmssffff") + System.IO.Path.GetExtension(oFile.FileName);
string sFilePath = System.IO.Path.Combine(this.UserFilesDirectory, sFileName);
oFile.SaveAs(sFilePath);
sFileUrl = this.UserFilesPath + sFileName;
}
else//文件大小超过限制
{
SendResults(1, "", "", "上传文件大小超出限制");
}
/**//////////////////////////////////////////////////////////////////////////////
SendResults(iErrorNumber, sFileUrl, sFileName);
}
最后只要在Web.Config文件中加入对文件上传的限制值就可以了.
<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<appSettings>
<add key="FCKeditor:UserFilesPath" value="/UserFiles/" />
<add key="FCKeditor:UserUploadType" value=".gif.jpg.jpeg.rar.zip.swf.png" />
<add key="FCKeditor:UserUploadSize" value="5120" /><!--单位为KB-->
</appSettings>
<system.web>
<httpRuntime maxRequestLength="512000" />
</system.web>
</configuration>
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