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<div class="moz-cite-prefix">Hola,<br>
<br>
I think you can pass on the ScreenProcessor / a Screen from your
trigger.<br>
<br>
Something like:<br>
<pre wrap="">$c->add_trigger( EP_TRIGGER_URL_REWRITE, sub
{
my( %args ) = @_;
my( $repository, $uri, $return_code, $request ) = @args{ qw( repository uri return_code request ) };
if( defined $uri && ($uri =~ m# ^/(\d+)/$ #x ) )
{
my $eprintid = $1;
my $eprint = $repository->dataset( "eprint" )->dataobj( $eprintid );
# this is an overridden 'permit' that does some new things, but still returns a '1' or '0'.
my $can_view = $eprint->permit( "eprint/view", $repository->current_user ); #NB current_user may be undef
if( $can_view ){
$r->set_handlers( PerlResponseHandler => sub {
my( $r ) = @_; # if needed
my $repository = <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">$EPrints::HANDLE->current_repository; # if needed<pre style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; white-space: pre-wrap;"></pre> EPrints::ScreenProcessor->process(
repository => $repository,
screenid => "YourScreenID",
# ... whatever other params your Screen needs ....
);
return HTTP_OK;
} );
$$return_code = EPrints::Const::OK;
return EP_TRIGGER_DONE;
}
}
return EP_TRIGGER_OK;
}, priority => 100 );
</pre>
<br>
Alternatively, you can have an actual Perl Response Handler, you
can use as templates:<br>
<br>
-
<a class="moz-txt-link-freetext" href="http://bazaar.eprints.org/325/1/epm/meprints/cfg/cfg.d/z_meprints.pl">http://bazaar.eprints.org/325/1/epm/meprints/cfg/cfg.d/z_meprints.pl</a>
(search for
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
EP_TRIGGER_URL_REWRITE)<br>
-
<a class="moz-txt-link-freetext" href="http://bazaar.eprints.org/325/1/plugins/EPrints/Plugin/MePrints/MePrintsHandler.pm">http://bazaar.eprints.org/325/1/plugins/EPrints/Plugin/MePrints/MePrintsHandler.pm</a>
(the handler can do whatever you want, you can print the page to
STDOUT, or let the ScreenProcessor do that for you).<br>
<br>
And just, as a small add-on, on some ACL work I was looking at, my
main method was called permit_action (on DataObj) and you pass the
action as a param so that it looks like:<br>
<br>
my $rc = $dataobj->permit_action( "view", $current_user );
# current_user may be undef too<br>
<br>
Hope this helps,<br>
Seb.<br>
<br>
<br>
<br>
On 17/07/14 13:45, Enio Carboni wrote:<br>
</div>
<blockquote cite="mid:53C7C56B.1010405@gmail.com" type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<div class="moz-cite-prefix">Hi John,<br>
I think you must use something like this in your
EP_TRIGGER_URL_REWRITE (this trigger, i think, can't control
direct "render a screen"):<br>
<br>
<blockquote>my
$url="your_url_to_redirect_this_call_i_think_to_screen_EPrint::SecureSummary_plus_args";<br>
EPrints::Apache::AnApache::send_status_line( $args{request},
307, "Temporary Redirect" );<br>
EPrints::Apache::AnApache::header_out( $args{request},
"Location", $url );<br>
EPrints::Apache::AnApache::send_http_header( $args{request} );<br>
${$args{return_code}} = EPrints::Apache::AnApache::DONE;<br>
return EP_TRIGGER_DONE;<br>
</blockquote>
<br>
Enio<br>
<br>
<br>
Il 17/07/2014 13:43, John Salter ha scritto:<br>
</div>
<blockquote
cite="mid:EMEW3|a9c49a9c59189b01f6a2d14f87250cb5q6GDGs14eprints-tech-bounces|ecs.soton.ac.uk|7154BCBB8909D642AE6F44CA713DBC2009A4D06FB116@HERMES7.ds.leeds.ac.uk"
type="cite">
<pre wrap="">Hi Seb,
Thanks for the reply, sorry for the delay in getting back to you.
I'm still not sure I understand how to get where I need to be - here's what I'm trying to do:
- intercept a request for an EPrint - the rewrite trigger matches a URL e.g. <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://repo/123/">http://repo/123/</a> with '^/(\d+)/$'. *
- check (with the new Access Control stuff we're working on :o) whether the request can view the item**
- if the request is permitted to view, render a variant of the EPrint::Summary screen, EPrint::SecureSummary
- if it can't, let EPrints do it's normal thing - which in this case will direct to a summary page with minimal metadata.
* I don’t want to redirect from <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://repo/123/">http://repo/123/</a> to <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://repo/cgi/">http://repo/cgi/</a>[something],
**There may not be a 'user' at this point in time - there could be an IP-based 'allow'.
Below is what I've got so far for my trigger - I've tried various things - either resulting in a login page, a 404 error or a smoking server...
$c->add_trigger( EP_TRIGGER_URL_REWRITE, sub
{
my( %args ) = @_;
my( $repository, $uri, $return_code, $request ) = @args{ qw( repository uri return_code request ) };
if( defined $uri && ($uri =~ m# ^/(\d+)/$ #x ) )
{
my $eprintid = $1;
my $eprint = $repository->dataset( "eprint" )->dataobj( $eprintid );
# this is an overridden 'permit' that does some new things, but still returns a '1' or '0'.
my $can_view = $eprint->permit( "eprint/view", $repository->current_user ); #NB current_user may be undef
if( $can_view ){
#render the EPrint::SecureSummary screen
#and set the return code?
# ${$return_code} = EPrints::Const::OK;
#return EP_TRIGGER_DONE;
}
}
return EP_TRIGGER_OK;
}, priority => 100 );
Any (further) thoughts welcomed!
Cheers,
John
-----Original Message-----
From: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:eprints-tech-bounces@ecs.soton.ac.uk">eprints-tech-bounces@ecs.soton.ac.uk</a> [<a moz-do-not-send="true" class="moz-txt-link-freetext" href="mailto:eprints-tech-bounces@ecs.soton.ac.uk">mailto:eprints-tech-bounces@ecs.soton.ac.uk</a>] On Behalf Of Sebastien Francois
Sent: 11 July 2014 11:37
To: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:eprints-tech@ecs.soton.ac.uk">eprints-tech@ecs.soton.ac.uk</a>
Subject: [EP-tech] Re: EP_TRIGGER_URL_REWRITE and redirecting to a screen
Hi John,
I don't think that case (1) redirects - see eprints3/cgi/users/home. It
just passes on the request to the ScreenProcessor. You could achieve the
same with a trigger in fact.
Since your screen already has a url
(<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://repo/cgi/users/home?screen=MyScreen">http://repo/cgi/users/home?screen=MyScreen</a>), I guess what you want to
do is a rewrite as in mod_rewrite.
Seb.
On 11/07/14 11:16, John Salter wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi,
What's the *best/intended* way to go from an EP_TRIGGER_URL_REWRITE trigger to a screen?
>From searching the Bazaar, is seems like most things like this either:
(1) use a cgi/... script that does the screen selection/processing, or
(2) register a handler that does the work (e.g. $request->set_handlers(PerlResponseHandler => [ 'EPrints::Plugin::MePrints::MePrintsHandler' ] ); )
Both seem not-quite-right: (1) requires the trigger to do a redirect (another HTTP call), (2) would duplicate a lot of stuff that EPrints does 'normally' (the screen I want to use is a normal EPrints screen).
Should the trigger should be able to do the work?
Have I missed some magic way of doing this?
Cheers,
John
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