public void OnActionExecuting(ActionExecutingContext filterContext)
{
var url = filterContext.RequestContext.HttpContext.Request.Url;
if (url == null)
{
return;
}
if (AdminFilter.IsApplied(new RequestContext(filterContext.HttpContext, new RouteData())))
{
return; //no automated redirects from admin
}
if (filterContext.HttpContext.Request.HttpMethod.Equals("POST", StringComparison.OrdinalIgnoreCase))
{
return; //do not redirect POST requests
}
var urlPrefix = _shellSettings.RequestUrlPrefix;
var applicationPath = filterContext.HttpContext.Request.ApplicationPath;
var strippedSegments = url.Segments.Select(s => s.Trim('/')).ToList();
//to generate the path we want to use, remove from the segments the ApplicationPath and UrlPrefix
//remove only the first of each, because there may be segments with the same "value"
//e.g. in https://localhost/Laser.Orchard/LaserTest/LaserTest:
// ApplicationPath == "/Laser.Orchard"
// UrlPrefix == "LaserTest"
// the second LaserTest is the alias of an actual page.
strippedSegments
.Remove(strippedSegments
.FirstOrDefault(s => s.Equals(applicationPath.Trim('/'), StringComparison.InvariantCultureIgnoreCase)));
if (!string.IsNullOrWhiteSpace(urlPrefix))
{
strippedSegments
.Remove(strippedSegments
.FirstOrDefault(s => s.Equals(urlPrefix.Trim('/'), StringComparison.InvariantCultureIgnoreCase)));
}
strippedSegments.RemoveAll(s => string.IsNullOrEmpty(s));
var normalizedApplicationPath = applicationPath.TrimEnd('/');
var serverUrl = GetServerUrl(url);
//if querystring is in redirects table, use it
var pathQs = string.Join("/", strippedSegments) + url.Query;
var redirect = _redirectService.GetCachedRedirects().FirstOrDefault(x => x.SourceUrl == pathQs);
if (redirect == null)
{
// else strip querystring to look for a match
var path = string.Join("/", strippedSegments);
redirect = _redirectService.GetCachedRedirects().FirstOrDefault(x => x.SourceUrl == path);
if (redirect != null)
{
var destination = serverUrl + normalizedApplicationPath +
(string.IsNullOrWhiteSpace(urlPrefix) ? "" : "/" + urlPrefix) +
"/" + redirect.DestinationUrl.TrimStart('/');
filterContext.Result = new RedirectResult(destination + url.Query, redirect.IsPermanent);
}
}
else
{
var destination = serverUrl + normalizedApplicationPath +
(string.IsNullOrWhiteSpace(urlPrefix) ? "" : "/" + urlPrefix) +
"/" + redirect.DestinationUrl.TrimStart('/');
filterContext.Result = new RedirectResult(destination, redirect.IsPermanent);
}
}
