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error404.aspx.cs
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122 lines (103 loc) · 3.59 KB
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using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using BlogEngine.Core.Web.Controls;
using BlogEngine.Core;
using System.Collections.Generic;
public partial class error404 : BlogBasePage
{
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
Response.StatusCode = 404;
}
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["aspxerrorpath"] != null && Request.QueryString["aspxerrorpath"].Contains("/post/"))
{
DirectHitSearch();
divDirectHit.Visible = true;
}
else if (Request.UrlReferrer == null)
{
divDirectHit.Visible = true;
}
else if (Request.UrlReferrer.Host == Request.Url.Host)
{
divInternalReferrer.Visible = true;
}
else if (GetSearchKey() != string.Empty)
{
SearchTerm = GetSearchTerm(GetSearchKey());
BindSearchResult();
divSearchEngine.Visible = true;
}
else if (Request.UrlReferrer != null)
{
divExternalReferrer.Visible = true;
}
Page.Title += Server.HtmlEncode(" - " + Resources.labels.PageNotFound);
}
private void DirectHitSearch()
{
string from = Request.QueryString["aspxerrorpath"];
int index = from.LastIndexOf("/") + 1;
string title = from.Substring(index).Replace(".aspx", string.Empty).Replace("-", " ");
List<IPublishable> items = Search.Hits(title, false);
if (items.Count > 0)
{
LiteralControl result = new LiteralControl($"<li><a href=\"{items[0].RelativeLink}\">{items[0].Title}</a></li>");
phSearchResult.Controls.Add(result);
}
}
private void BindSearchResult()
{
List<IPublishable> items = Search.Hits(SearchTerm, false);
int max = 1;
foreach (IPublishable item in items)
{
HtmlAnchor link = new HtmlAnchor();
link.InnerHtml = item.Title;
link.HRef = item.RelativeLink.ToString();
divSearchResult.Controls.Add(link);
if (!string.IsNullOrEmpty(item.Description))
{
HtmlGenericControl desc = new HtmlGenericControl("span");
desc.InnerHtml = item.Description;
divSearchResult.Controls.Add(new LiteralControl("<br />"));
divSearchResult.Controls.Add(desc);
}
divSearchResult.Controls.Add(new LiteralControl("<br />"));
max++;
if (max == 3)
break;
}
}
protected string SearchTerm = string.Empty;
private string GetSearchKey()
{
string referrer = Request.UrlReferrer.Host.ToLowerInvariant();
if (referrer.Contains("google.") && referrer.Contains("q="))
return "q=";
if (referrer.Contains("yahoo.") && referrer.Contains("p="))
return "p=";
if (referrer.Contains("q="))
return "q=";
return string.Empty;
}
/// <summary>
/// Retrieves the search term from the specified referrer string.
/// </summary>
private string GetSearchTerm(string key)
{
string referrer = Request.UrlReferrer.ToString();
int start = referrer.IndexOf(key) + key.Length;
int stop = referrer.IndexOf("&", start);
if (stop == -1)
stop = referrer.Length;
string term = referrer.Substring(start, stop - start);
return term.Replace("+", " ");
}
}