kindeditor编辑器图片水印

<%@ webhandler Language="C#" class="edit_html_upload_pic" %>
using System;
using System.Collections;
using System.Web;
using System.IO;
using System.Globalization;
using LitJson;
using System.Web.SessionState;
using System.Drawing;
using System.Drawing.Imaging;
public class edit_html_upload_pic : IHttpHandler, IRequiresSessionState
{
private HttpContext context;

public void ProcessRequest(HttpContext context)
{
String aspxUrl = context.Request.Path.Substring(0, context.Request.Path.LastIndexOf("/") + 1);

//每个用户文件夹独立IRequiresSessionState
String sessionUploadPath = String.Empty;
if (HttpContext.Current.Session["edit_upload_folder"] != null)
{
sessionUploadPath = HttpContext.Current.Session["edit_upload_folder"].ToString() + "/";
}

//文件保存目录路径
String savePath = "../../" + getConfigAppSettings("uploadFolder") + "/" + sessionUploadPath;
//文件保存目录URL
String saveUrl = aspxUrl + "../../" + getConfigAppSettings("uploadFolder") + "/" + sessionUploadPath;

//定义允许上传的文件扩展名
Hashtable extTable = new Hashtable();
extTable.Add("image", "gif,jpg,jpeg,png,bmp");
extTable.Add("flash", "swf,flv");
extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

//最大文件大小
int maxSize = 2000000;//2m
this.context = context;

HttpPostedFile imgFile = context.Request.Files["imgFile"];
if (imgFile == null)
{
showError("请选择文件。");
}

String dirPath = context.Server.MapPath(savePath);
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}

String dirName = context.Request.QueryString["dir"] != null ? context.Request.QueryString["dir"] : "image";
String fileName = imgFile.FileName;
String fileExt = Path.GetExtension(fileName).ToLower();

if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)
{
showError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。");
}
if (dirName == "image")
{
if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
{
showError("上传文件大小超过限制。");
}
if (!isPic(imgFile))
{
showError("上传文件不合法！");
}
}

//创建文件夹
//dirPath += dirName + "/";
//saveUrl += dirName + "/";
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}
String ymd = DateTime.Now.ToString("yyyyMM", DateTimeFormatInfo.InvariantInfo);
dirPath += ymd + "/";
saveUrl += ymd + "/";
if (!Directory.Exists(dirPath))
{
Directory.CreateDirectory(dirPath);
}

//edit_upload_fileName
//string sessionUploadFileName = string.Empty;
//if (HttpContext.Current.Session["edit_upload_fileName"] != null)
//{
//    sessionUploadFileName = HttpContext.Current.Session["edit_upload_fileName"].ToString();
//}
//String newFileName = sessionUploadFileName + DateTime.Now.ToString("yyyyMMddHHmmssffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
//String filePath = dirPath + newFileName;
//imgFile.SaveAs(filePath);
//String fileUrl = saveUrl + newFileName;

//水印start
String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo);
String filePath = dirPath + newFileName + fileExt;
imgFile.SaveAs(filePath);
String fileUrl = saveUrl + newFileName + fileExt;
//添加文字水印
Image image = System.Drawing.Image.FromFile(filePath);
Graphics g = Graphics.FromImage(image);
g.DrawImage(image, 0, 0, image.Width, image.Height);
Font f = new Font("Verdana", 14);
Brush b = new SolidBrush(Color.Red);
string addText = "www.114390.com";
g.DrawString(addText, f, b, 10, 10);
g.Dispose();
//保存加水印过后的图片,删除原始图片
string newPath = dirPath + newFileName + "_new" + fileExt;
image.Save(newPath);
image.Dispose();
if (File.Exists(filePath))
{
File.Delete(filePath);
}
fileUrl = saveUrl + newFileName + "_new" + fileExt;
//水印end

Hashtable hash = new Hashtable();
hash["error"] = 0;
hash["url"] = fileUrl;
context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
context.Response.Write(JsonMapper.ToJson(hash));
context.Response.End();
}
private string getConfigAppSettings(string keyName)
{
if (!string.IsNullOrEmpty(keyName))
{
return System.Configuration.ConfigurationManager.AppSettings[keyName];
}
return "";
}
private void showError(string message)
{
Hashtable hash = new Hashtable();
hash["error"] = 1;
hash["message"] = message;
context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
context.Response.Write(JsonMapper.ToJson(hash));
context.Response.End();
}

public bool IsReusable
{
get
{
return true;
}
}
public bool isPic(HttpPostedFile imgFile)
{
int fileLen=imgFile.ContentLength;
byte[] imgArray = new byte[fileLen];
imgFile.InputStream.Read(imgArray, 0, fileLen);
MemoryStream ms = new MemoryStream(imgArray);
BinaryReader br = new BinaryReader(ms);
string fileclass = "";
byte buffer;
try
{
buffer = br.ReadByte();
fileclass = buffer.ToString();
buffer = br.ReadByte();
fileclass += buffer.ToString();
}
catch
{ }
br.Close();
ms.Close();
//
try
{
//读取上传的文件是否是图片对象，异常则删除图片
System.Drawing.Image uploadedImg = System.Drawing.Image.FromStream(imgFile.InputStream);
if (uploadedImg.Width < 1 || uploadedImg.Height < 1)
{
return false;
}
uploadedImg.Dispose();
}
catch
{
return false;
}
//
FileExtension[] fileEx = { FileExtension.GIF, FileExtension.BMP, FileExtension.JPG, FileExtension.PNG};
foreach (FileExtension fe in fileEx)
{
try
{
if (Int32.Parse(fileclass) == (int)fe)
{
if (truePic(System.Text.Encoding.ASCII.GetString(imgArray)))
{
return true;
}
return false;
}
}
catch
{ }

}
return false;
}
//判断上传文件中是否包含关键字
public bool truePic(string str)
{
string sStr = ".getfolder|.createfolder|.deletefolder|.createdirectory|.deletedirectory|.saveas|wscript.shell|script.encode|server.|.createobject|execute|activexobject|language=|exec |insert |select |delete |update |truncate |declare |iframe |Response|Request(| Eval|Eval |Eval(|%Eval|script |using";
string[] ck = sStr.Split('|');
string strsql = str;
for (int i = 0; i < ck.Length; i++)
{
if (str.IndexOf(ck[i]) != -1 || str.ToUpper().IndexOf(ck[i].ToUpper()) != -1)
{
return false;
}
}
return true;
}
//文件类型
public enum FileExtension
{
JPG = 255216,
GIF = 7173,
PNG = 13780,
BMP = 6677,
SWF = 6787,
SWF2 = 7087,
RAR = 8297,
ZIP = 8075,
DOC = 208207,
DOCX = 8075,
XLS = 208207,
XLS2 = 198243,
XLSX = 8075,
//_7Z = 55122,
// 255216 jpg;
// 7173 gif;
// 6677 bmp,
// 13780 png;
// 6787 swf
// 7790 exe dll,
// 8297 rar
// 8075 zip
// 55122 7z
// 6063 xml
// 6033 html
// 239187 aspx
// 117115 cs
// 119105 js
// 102100 txt
// 255254 sql
/*
DOC = 208207,
DOCX = 8075,
XLS = 208207,
XLSX = 8075,
JS = 239187,
TXT = 7067,
MP3 = 7368,
WMA = 4838,
MID = 7784,
*/
}
}