public static bool SendPingback(Uri source, Uri target, Uri pingbackUri, Action<string> logError, out int errorCode, out string serverMessage)
{
HttpRequestUtil http = new HttpRequestUtil(pingbackUri);
string xmlrpc = @"<?xml version=""1.0""?><methodCall><methodName>pingback.ping</methodName><params>" +
@"<param><value><string>{0}</string></value></param>" +
@"<param><value><string>{1}</string></value></param></params></methodCall>";
xmlrpc = String.Format(xmlrpc, HttpUtility.HtmlEncode(source.AbsoluteUri), HttpUtility.HtmlEncode(target.AbsoluteUri));
byte[] postdata = Encoding.UTF8.GetBytes(xmlrpc);
if (http.Post(pingbackUri.PathAndQuery, "application/xml", postdata, postdata.Length) != HttpStatusCode.OK)
{
logError(String.Format("POST {0}: {1}/{2}", pingbackUri, (int)http.StatusCode, http.StatusCode));
errorCode = (int)http.StatusCode;
serverMessage = "The server returned an http error " + (int)http.StatusCode;
}
else
{
if (!http.ContentType.StartsWith("text/xml", StringComparison.OrdinalIgnoreCase) &&
!http.ContentType.StartsWith("application/xml", StringComparison.OrdinalIgnoreCase))
{
logError("Expected content type: application/xml, found: " + http.ContentType);
}
try
{
XmlLightDocument doc = new XmlLightDocument(Encoding.UTF8.GetString(http.Content));
XmlLightElement error = doc.SelectSingleNode("methodResponse/fault");
if (error != null)
{
XmlLightElement faultCode = error.SelectSingleNode("value/struct/member[name/text()='faultCode']/value/int");
XmlLightElement faultString = error.SelectSingleNode("value/struct/member[name/text()='faultString']/value");
if (faultCode == null || !int.TryParse(faultCode.InnerText, out errorCode))
errorCode = 0;
serverMessage = faultString != null ? faultString.InnerText : "Unknown Error";
}
else
{
serverMessage = doc.SelectRequiredNode("/methodResponse/params/param/value").InnerText;
errorCode = 0;
return true;
}
}
catch (Exception e)
{
logError("Error parsing response: " + e.Message);
serverMessage = "Unable to parse xml response.";
errorCode = 0;
}
}
return false;
}
