public Task Invoke(HttpContext context, IUrlService urlService, IWorkContext workContext)
{
if (context.Response.StatusCode is (>= 200 and < 300))
{
var policy = urlService.GetUrlPolicy();
if (policy.IsInvalidUrl)
{
context.Response.StatusCode = 404;
return(Task.CompletedTask);
}
else if (policy.IsModified)
{
return(HandleRedirect(policy.GetModifiedUrl()));
}
policy = urlService.ApplyCanonicalUrlRulesPolicy();
var endpoint = context.GetEndpoint();
if (endpoint != null)
{
policy = urlService.ApplyCultureUrlPolicy(endpoint);
}
// Check again after policies has been applied
if (policy.IsInvalidUrl)
{
context.Response.StatusCode = 404;
return(Task.CompletedTask);
}
else if (policy.IsModified)
{
return(HandleRedirect(policy.GetModifiedUrl()));
}
policy.WorkingLanguage = workContext.WorkingLanguage;
if (policy.Endpoint == null)
{
// We may need the original endpoint for logging and error handling purposes later,
// but the ExeptionHandler middleware sets endpoint to null in order to re-execute correctly.
// Therefore we gonna save it here, but only if we're not in re-execution.
policy.Endpoint = context.GetEndpoint();
}
}
// No redirection was requested. Continue.
return(_next(context));
Task HandleRedirect(string path)
{
context.Response.StatusCode = context.Connection.IsLocal() ? 302 : 301;
context.Response.Headers[HeaderNames.Location] = path;
return(Task.CompletedTask);
}
}