/// <summary>
/// If the request is SPA request, we need to verify that the page contains the same SpaContentPlaceHolder.
/// Also we need to check that the placeholder is the same.
/// </summary>
private void VerifySpaRequest(DotvvmRequestContext context, DotvvmView page)
{
if (context.IsSpaRequest)
{
var spaContentPlaceHolders = page.GetAllDescendants().OfType<SpaContentPlaceHolder>().ToList();
if (spaContentPlaceHolders.Count > 1)
{
throw new Exception("Multiple controls of type <dot:SpaContentPlaceHolder /> found on the page! This control can be used only once!"); // TODO: exception handling
}
if (spaContentPlaceHolders.Count == 0 || spaContentPlaceHolders[0].GetSpaContentPlaceHolderUniqueId() != context.GetSpaContentPlaceHolderUniqueId())
{
// the client has loaded different page which does not contain current SpaContentPlaceHolder - he needs to be redirected
context.RedirectToUrl(context.OwinContext.Request.Uri.AbsoluteUri);
}
}
}
/// <summary>
/// Checks that the content page does not contain invalid content.
/// </summary>
private List<Content> GetChildPageContents(DotvvmView childPage, List<ContentPlaceHolder> parentPlaceHolders)
{
// make sure that the body contains only whitespace and Content controls
if (!childPage.Children.All(c => (c is RawLiteral && ((RawLiteral)c).IsWhitespace) || (c is Content)))
{
throw new Exception("If the page contains @masterpage directive, it can only contain white space and <dot:Content /> controls!"); // TODO: exception handling
}
// make sure that the Content controls are not nested in other elements
var contents = childPage.GetAllDescendants().OfType<Content>()
.Where(c => !(bool) c.GetValue(Internal.IsMasterPageCompositionFinishedProperty))
.ToList();
if (contents.Any(c => c.Parent != childPage))
{
throw new Exception("The control <dot:Content /> cannot be placed inside any control!"); // TODO: exception handling
}
return contents;
}
