/n3c/N3C.Site/Handler/TrackBackHandler.ashx.cs

using System;

using System.Collections.Generic;

using System.Web;

using System.Web.Services;

using System.Xml;

using N3C.DAO;

using N3C.POCO;

using N3C.Utils;



namespace N3C.Site.Handler

{

    /// <summary>

    /// $codebehindclassname$ ?????

    /// </summary>

    [WebService(Namespace = "http://tempuri.org/")]

    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

    public class TrackBackHandler : IHttpHandler, System.Web.SessionState.IRequiresSessionState

    {



        public void ProcessRequest(HttpContext ctx)

        {

            ctx.Response.ContentType = "text/xml";

            XmlDocument xmlDoc;

            XmlNode root;

            XmlElement node;

            EntryCmt objEntryCmt;

            EntryCmtDAO daoEntryCmt;



            //ctx.Response.Write("Hello World");

            //???????

            Dictionary<string, string> customConfig = N3Cconst.LoadCustomConfig();

            xmlDoc = new XmlDocument();

            xmlDoc.AppendChild(xmlDoc.CreateXmlDeclaration("1.0", "UTF-8", null));

            //????Root???

            xmlDoc.AppendChild(xmlDoc.CreateElement(null, "response", null));

            root = xmlDoc.SelectSingleNode("response");

            if (customConfig[N3Cconst.OpenTrackBack] == "true")

            {

                if (ctx.Request.RequestType == "POST")

                {

                    //initialize spam session,for a session life,

                    //not more than 2 trackback can be posted here

                    //otherwise,deneied.

                    int entryId = 0;

                    Int32.TryParse(ctx.Request["id"], out entryId);

                    if (entryId > 0 && null != new viewEntryDAO().Find(entryId))

                    {

                        if (null == ctx.Session["TBUser"]) ctx.Session["TBUser"] = 0;

                        if (Convert.ToInt32(ctx.Session["TBUser"]) > 1)

                        {

                            node = xmlDoc.CreateElement("error");

                            node.InnerText = "1";

                            root.AppendChild(node);



                            node = xmlDoc.CreateElement("message");

                            node.InnerText = "??????,????SPAM";

                            root.AppendChild(node);

                        }

                        else

                        {

                            string tbTitle = ctx.Request.Form["title"];

                            string tbUrl = ctx.Request.Form["url"];

                            string tbContent = ctx.Request.Form["excerpt"];

                            string tbBlogName = ctx.Request.Form["blog_name"];

                            daoEntryCmt = new EntryCmtDAO();



                            if (!daoEntryCmt.IsExistTrackback(entryId, tbUrl))

                            {

                                //create a comment of entry as trackback

                                objEntryCmt = new EntryCmt();

                                objEntryCmt.AddTime = DateTime.Now;

                                objEntryCmt.Author = tbBlogName;

                                objEntryCmt.EntryId = entryId;

                                objEntryCmt.IsPublic = 1;

                                objEntryCmt.UserEmail = customConfig[N3Cconst.PublicEmail];

                                objEntryCmt.IP = ctx.Request.UserHostAddress;

                                objEntryCmt.UserSite = tbUrl;

                                objEntryCmt.TrackBackUrl = tbUrl;

                                objEntryCmt.Content = "<h3>" + tbTitle + "</h3>" + tbContent;

                                try

                                {

                                    daoEntryCmt.Create(objEntryCmt);

                                    //????????

                                    UtilModel.ClearCache(N3Cconst.CacheRecentCmt);

                                    //??????

                                    node = xmlDoc.CreateElement("error");

                                    node.InnerText = "0";

                                    root.AppendChild(node);

                                    //????TRACK URL?????,??2?

                                    ctx.Session["TBUser"] = 1 + Convert.ToInt32(ctx.Session["TBUser"]);

                                }

                                catch (Exception)

                                {

                                    node = xmlDoc.CreateElement("error");

                                    node.InnerText = "1";

                                    root.AppendChild(node);



                                    node = xmlDoc.CreateElement("message");

                                    node.InnerText = "??TrackBack??";

                                    root.AppendChild(node);

                                }

                            }

                            else

                            {

                                node = xmlDoc.CreateElement("error");

                                node.InnerText = "1";

                                root.AppendChild(node);



                                node = xmlDoc.CreateElement("message");

                                node.InnerText = "?URL?????TrackBack,??????";

                                root.AppendChild(node);

                            }

                        }

                    }

                    else

                    {

                        node = xmlDoc.CreateElement("error");

                        node.InnerText = "1";

                        root.AppendChild(node);



                        node = xmlDoc.CreateElement("message");

                        node.InnerText = "?????ID";

                        root.AppendChild(node);



                    }

                }

                else

                {

                    node = xmlDoc.CreateElement("error");

                    node.InnerText = "1";

                    root.AppendChild(node);



                    node = xmlDoc.CreateElement("message");

                    node.InnerText = "???????";

                    root.AppendChild(node);

                }

            }

            else

            {

                node = xmlDoc.CreateElement("error");

                node.InnerText = "1";

                root.AppendChild(node);



                node = xmlDoc.CreateElement("message");

                node.InnerText = "?????TrackBack??";

                root.AppendChild(node);

            }



            //response XML

            xmlDoc.Save(ctx.Response.OutputStream);

            ctx.Response.End();



        }



        public bool IsReusable

        {

            get

            {

                return false;

            }

        }

    }

}