public void Verify(Pingback pingback)
{
var akismet = Connect();
var akismetComment = new AkismetComment();
akismetComment.Blog = "http://www.funnelweblog.com";
akismetComment.CommentAuthorUrl = pingback.TargetUri;
akismetComment.CommentContent = pingback.TargetUri;
akismetComment.CommentType = "pingback";
pingback.IsSpam = akismet.CommentCheck(akismetComment);
}
protected override string ProcessRequest(string methodName, List<string> parameters)
{
Uri sourceUri;
Uri targetUri;
if (!Uri.TryCreate(parameters.First(), UriKind.Absolute, out sourceUri))
throw new XmlRpcFaultException(16, "The sourceURI was not provided or was not in a valid format.");
if (!Uri.TryCreate(parameters.Last(), UriKind.Absolute, out targetUri))
throw new XmlRpcFaultException(32, "The targetURI was not provided or was not in a valid format.");
var pageName = targetUri.AbsolutePath.Substring(1);
if (pageName.LastIndexOf('/') > 2)
{
pageName = pageName.Substring(0, pageName.LastIndexOf('/'));
}
var session = DependencyResolver.Current.GetService<ISession>();
var repository = DependencyResolver.Current.GetService<IRepository>();
var spamChecker = DependencyResolver.Current.GetService<ISpamChecker>();
var transaction = session.BeginTransaction(IsolationLevel.Serializable);
try
{
// Ensure the link is for a page that exists
var entry = repository.FindFirstOrDefault(new EntryByNameQuery(pageName));
if (entry == null)
{
throw new XmlRpcFaultException(32, "The targetURI refers to a page that does not exist.");
}
// Ensure a pingback doesn't already exist
var existing = entry.Pingbacks.FirstOrDefault(x => x.TargetUri.ToLowerInvariant() == sourceUri.ToString().ToLowerInvariant());
if (existing != null)
{
throw new XmlRpcFaultException(48, "A pingback for this URI has already been registered.");
}
var pingback = new Pingback
{
Entry = entry.Entry.Value,
TargetUri = sourceUri.ToString().ToLowerInvariant(),
TargetTitle = string.Empty,
Received = DateTime.UtcNow
};
// Check the calling page
try
{
var request = WebRequest.Create(sourceUri);
var response = request.GetResponse();
var responseBody = new StreamReader(response.GetResponseStream()).ReadToEnd();
if (!responseBody.Contains(parameters.Last()))
{
throw new XmlRpcFaultException(17, "The document at the sourceURI does not contain a link to the targetURI");
}
var find = Regex.Match(responseBody, "\\<title.*?\\>(.*?)\\</title\\>");
pingback.TargetTitle = find.Success ? HttpContext.Current.Server.HtmlDecode(find.Groups[1].Value) : sourceUri.ToString().ToLower();
}
catch (XmlRpcFaultException)
{
throw;
}
catch (Exception ex)
{
throw new XmlRpcFaultException(50, string.Format("The server encountered problems attempting to connect to the sourceURI. {0}", ex.Message));
}
// Save the pingback
spamChecker.Verify(pingback);
entry.Pingbacks.Add(pingback);
session.Flush();
transaction.Commit();
}
catch (Exception)
{
transaction.Rollback();
throw;
}
return "Thanks, your pingback has been received.";
}
