I am whacked on this bad Mason issue. My apache passes .html files through mason.

My dhandler catches unknown requests. So /this-isnt-a-page.html ends up in the dhandler. The dhandler redirects to page-not-found-error.html

The redirect sends the bad page name as a parameter. 

if (! ($r->uri =~ / special patterns go here /)) {
        $m->redirect('/page-not-found-error.html?p=' .uri_escape($r->u
+ri));
}

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For a bad directory, /this-directory-does-not-exist Apache itself redirects: 
ErrorDocument 404 /page-not-found-error.html

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And page-not-found-error.html ends in .html so it is also handled by mason, and it works in both cases (mason dhandler redirect or apache 404 redirect): 
% my $page = uri_unescape($p) ||  $ENV{REDIRECT_URL};
You were looking for <% $page %> and the server can't find it.

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All this works.

In page-not-found-error.html there is a hash that remaps old paths to new paths -- that is, doing aliasing via Mason rather than in apache.conf: 

if ($new) {
 # from http://www.masonhq.com/?FAQ:HTTPAndHTML
 $m->clear_buffer;
 $r->method('GET');
 $r->headers_in->unset('Content-length');
 $r->content_type('text/html');
 $r->header_out('Location' => $new);
 $m->abort(301);
}

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This works.

I can set up a hash entry saying /login/advanced/game.html redirects to /login/agame.html and it works.

What doesn't work is when there's no file name: /this-directory-does-not-exist

While I can determine where to send it correctly, /the-right-place/index.html Apache throws an error like this 

Not Found

The requested URL /login/advanced was not found on this server.

Additionally, a 301 Moved Permanently error was encountered while tryi
+ng to use an ErrorDocument to handle the request.

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Complicated question, but why won't apache take a request for /login/advanced which then remaps to /login/advanced/index.html and is dispatchd using 
 $m->clear_buffer;
 $r->method('GET');
 $r->headers_in->unset('Content-length');
 $r->content_type('text/html');
 $r->header_out('Location' => $new);
 $m->abort(301);

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and do it? Why is apache bitching about 
The requested URL /login/advanced was not found on this server.

Additionally, a 301 Moved Permanently error was encountered while tryi
+ng to use an ErrorDocument to handle the request.

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Help!

In reply to mason, dhandlers, page not found, and redirects by Anonymous Monk

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