kindeditor编辑器图片水印
//upload_pic.ashx源码
<%@ 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, */ } }
