public static void DoRedirect(ControlCollection logToControls, bool redirectWhenNo404Detected = false, bool onlyLogWhen404 = false)
{
// find incoming URL
string incoming = "";
try
{
// nothing to do if it's already a redirect because of an error
//if (!String.IsNullOrEmpty(Request.QueryString["aspxerrorpath"]))
// return;
bool is404 = false;
// we're matching lowercased: case insensitive
incoming = IncomingUrl(logToControls, ref is404).ToLower();
// enable logging when DNN detects a 404 later on (e.g. for extentionless urls)
HttpContext.Current.Items["40F_SEO_IncomingUrl"] = incoming;
// register whether or not a 404 was detected
RedirectController.SetRequest404Detected(is404);
// since generating a 404 inside a 404 page
// (which is what we do in case of .aspx errors)
// will cause an additional redirect to the error page,
// we here check if the incoming url contains an aspx error path
// if so: stop processing, we're already done.
if (HasAspxError(incoming))
{
SetStatus404();
return;
}
if (UserInfo.IsSuperUser)
{
logToControls.Add(new LiteralControl(String.Format("Incoming: {0}<br/>", incoming)));
}
// check if URL is in Sources of mappingtable
string target = "";
var mappingsNoRegex = RedirectConfig.Instance.MappingsDictionary(false);
if (UserInfo.IsSuperUser)
{
logToControls.Add(new LiteralControl(String.Format("Mappings (with regex): {0}<br/>", RedirectConfig.Instance.MappingsDictionary(true).Count)));
}
if (UserInfo.IsSuperUser)
{
logToControls.Add(new LiteralControl(String.Format("Mappings (no regex): {0}<br/>", mappingsNoRegex.Count)));
}
// if we're in a 404, let's try to find a mapping
if (is404 || redirectWhenNo404Detected)
{
Common.Logger.Debug($"Try to find a mapping for [{incoming}]");
// first try non-regex mappings, as they're supposed to be faster
if (mappingsNoRegex.ContainsKey(incoming))
{
target = mappingsNoRegex[incoming];
Common.Logger.Debug($"Mapping without regex found, Target: [{target}]");
}
else if (mappingsNoRegex.ContainsKey(ToRelativeUrl(incoming)))
{
target = mappingsNoRegex[ToRelativeUrl(incoming)];
Common.Logger.Debug($"Mapping without regex found, Target: [{target}]");
}
else
{
// no match found without regexes, try the ones with regex
var mappingsUsingRegex = RedirectConfig.Instance.MappingsDictionary(true);
// now try and match each one
foreach (var mapping in mappingsUsingRegex)
{
var mappingSource = ToFullUrl(mapping.Key);
var mappingTarget = ToFullUrl(mapping.Value);
if (Regex.IsMatch(incoming, mappingSource))
{
// got a match!
target = Regex.Replace(incoming, mappingSource, mappingTarget);
Common.Logger.Debug($"Mapping with regex found, Target: [{target}]");
}
}
}
}
// Log this 404
var ps = Common.CurrentPortalSettings;
if (is404 || (redirectWhenNo404Detected && !string.IsNullOrEmpty(target)))
{
Common.Logger.Debug($"Logging redirect: is404:{is404}, redirectWhenNo404Detected:{redirectWhenNo404Detected}, target:[{target}]");
AddRedirectLog(ps.PortalId, incoming, target);
}
else if (!onlyLogWhen404)
{
Common.Logger.Debug($"Logging redirect for !onlyLogWhen404 target:[{target}]");
AddRedirectLog(ps.PortalId, incoming, target);
}
if (UserInfo.IsSuperUser)
{
logToControls.Add(new LiteralControl(String.Format("Target: {0}<br/>", target)));
}
// if so: redirect
if (!String.IsNullOrEmpty(target))
{
try
{
Common.Logger.Debug($"Redirect to:[{target}]");
Response.Redirect(target, false);
Response.StatusCode = 301;
Response.End();
}
catch (Exception)
{
// do nothing: threadabortexception is normal behaviour
}
}
// we're only displaying the logging if it's a 404
if (!is404)
{
logToControls.Clear();
}
//else if (is404) // only if it was a 404 incoming
//{
// // tell the client that the page wasn't found
// SetStatus404();
//}
}
catch (Exception exception)
{
Common.Logger.Error($"Exception in DoRedirect: {exception.Message}. Stacktrace: {exception.StackTrace}");
// we're not writing in the eventlog, since the amount of log records can really explode
if (UserInfo.IsSuperUser)
{
logToControls.Add(new LiteralControl(String.Format("Error: {0}<br/>", exception.Message + "<br/>" + exception.StackTrace)));
}
}
}
