internal TrackbackJob(TrackbackInfo info, Entry entry)
{
this.info = info;
this.entry = entry;
}
protected void PingbackWorker(object argument)
{
PingbackJob job = argument as PingbackJob;
if (job.entry.Content != null &&
job.entry.Content.Length > 0)
{
foreach (Match match in anchors.Matches(job.entry.Content))
{
string url = match.Groups["url"].Value;
if (url.StartsWith("http"))
{ // don't pass in a url withouth http into Uri constructor
try
{
Uri externalUri = new Uri(url);
if (externalUri.Scheme == Uri.UriSchemeHttp)
{
// we're auto-detecting pingbacks and while we do that
// we send a trackback in hope that the server may understand
// that already. We're appending to the target URL and
// therefore shouldn't interfere with the server logic in case
// the identifiers collide with those the server is using.
HttpWebRequest webRequest = WebRequest.Create(externalUri) as HttpWebRequest;
webRequest.Method = "GET";
webRequest.UserAgent = this.UserAgent;
HttpWebResponse response = webRequest.GetResponse() as HttpWebResponse;
// now we want to get the page contents of the target body
string requestBody = null;
using (StreamReader requestReader = new StreamReader(response.GetResponseStream()))
{
requestBody = requestReader.ReadToEnd();
}
response.Close();
// we will try a trackback first before a pingback
// we need to auto discover the trackback url
// http://www.movabletype.org/docs/mttrackback.html
string trackbackUrl = GetTrackbackLink(requestBody, externalUri.AbsoluteUri);
if (trackbackUrl != null)
{
TrackbackInfo info = new TrackbackInfo(trackbackUrl, job.info.SourceUrl, job.info.SourceTitle, job.info.SourceExcerpt, job.info.SourceBlogName);
TrackbackWorker(new TrackbackJob(info, job.entry));
}
// first we try and get the X-Pingback HTTP header
// http://www.hixie.ch/specs/pingback/pingback
string pingbackService = response.GetResponseHeader("X-Pingback");
// if we don't get the header
// try and autodetect the auto pingback info
if (pingbackService == null || pingbackService.Length == 0)
{
string[] split = pingbackRegex.Split(requestBody);
if (split.Length == 1)
pingbackService = split[0];
}
if (pingbackService != null && pingbackService.Length > 0)
{
Pingback(job.info.SourceUrl, pingbackService, url, job.entry.Title);
}
}
}
catch (Exception e)
{
ErrorTrace.Trace(TraceLevel.Error, e);
if (loggingService != null)
{
loggingService.AddEvent(
new EventDataItem(EventCodes.Error,
e.ToString().Replace("\n", "<br />"),
"PingbackWorker, auto-discovery of: " + url));
}
}
}
}
}
}
