X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=catagits%2FCatalyst-Runtime.git;a=blobdiff_plain;f=lib%2FCatalyst.pm;h=9f2f83676bad412744c8e424091e7a0fbc2efa3a;hp=70309308757fabc4d7072f3c4afbbedff2e8b750;hb=62b6b631cf9141ffd9ae02e4b87c182b080b335a;hpb=220f4575b4d62cc066abde31ebb228c457562a0f diff --git a/lib/Catalyst.pm b/lib/Catalyst.pm index 7030930..9f2f836 100644 --- a/lib/Catalyst.pm +++ b/lib/Catalyst.pm @@ -4,7 +4,6 @@ use Moose; use Moose::Meta::Class (); extends 'Catalyst::Component'; use Moose::Util qw/find_meta/; -use bytes; use B::Hooks::EndOfScope (); use Catalyst::Exception; use Catalyst::Exception::Detach; @@ -15,6 +14,7 @@ use Catalyst::Request::Upload; use Catalyst::Response; use Catalyst::Utils; use Catalyst::Controller; +use Data::OptList; use Devel::InnerPackage (); use File::stat; use Module::Pluggable::Object (); @@ -79,14 +79,7 @@ __PACKAGE__->stats_class('Catalyst::Stats'); # Remember to update this in Catalyst::Runtime as well! -our $VERSION = '5.80013'; - -{ - my $dev_version = $VERSION =~ /_\d{2}$/; - *_IS_DEVELOPMENT_VERSION = sub () { $dev_version }; -} - -$VERSION = eval $VERSION; +our $VERSION = '5.80022'; sub import { my ( $class, @arguments ) = @_; @@ -98,11 +91,6 @@ sub import { my $caller = caller(); return if $caller eq 'main'; - # Kill Adopt::NEXT warnings if we're a non-RC version - unless (_IS_DEVELOPMENT_VERSION()) { - Class::C3::Adopt::NEXT->unimport(qr/^Catalyst::/); - } - my $meta = Moose::Meta::Class->initialize($caller); unless ( $caller->isa('Catalyst') ) { my @superclasses = ($meta->superclasses, $class, 'Catalyst::Controller'); @@ -255,6 +243,9 @@ environment with CATALYST_DEBUG or _DEBUG. The environment settings override the application, with _DEBUG having the highest priority. +This sets the log level to 'debug' and enables full debug output on the +error screen. If you only want the latter, see L<< $c->debug >>. + =head2 -Engine Forces Catalyst to use a specific engine. Omit the @@ -274,6 +265,14 @@ is replaced with the uppercased name of your application, any "::" in the name will be replaced with underscores, e.g. MyApp::Web should use MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used. +If none of these are set, Catalyst will attempt to automatically detect the +home directory. If you are working in a development envirnoment, Catalyst +will try and find the directory containing either Makefile.PL, Build.PL or +dist.ini. If the application has been installed into the system (i.e. +you have done C), then Catalyst will use the path to your +application module, without the .pm extension (ie, /foo/MyApp if your +application was installed at /foo/MyApp.pm) + =head2 -Log use Catalyst '-Log=warn,fatal,error'; @@ -333,8 +332,8 @@ call to forward. my $foodata = $c->forward('/foo'); $c->forward('index'); - $c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/); - $c->forward('MyApp::View::TT'); + $c->forward(qw/Model::DBIC::Foo do_stuff/); + $c->forward('View::TT'); Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies an C<< eval { } >> around the call (actually @@ -343,22 +342,22 @@ all 'dies' within the called action. If you want C to propagate you need to do something like: $c->forward('foo'); - die $c->error if $c->error; + die join "\n", @{ $c->error } if @{ $c->error }; Or make sure to always return true values from your actions and write your code like this: $c->forward('foo') || return; - + Another note is that C<< $c->forward >> always returns a scalar because it actually returns $c->state which operates in a scalar context. Thus, something like: return @array; - -in an action that is forwarded to is going to return a scalar, + +in an action that is forwarded to is going to return a scalar, i.e. how many items are in that array, which is probably not what you want. -If you need to return an array then return a reference to it, +If you need to return an array then return a reference to it, or stash it like so: $c->stash->{array} = \@array; @@ -418,9 +417,9 @@ sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) } =head2 $c->go( $class, $method, [, \@captures, \@arguments ] ) -The relationship between C and +The relationship between C and L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as -the relationship between +the relationship between L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>, C<< $c->go >> will perform a full dispatch on the specified action or method, @@ -505,7 +504,7 @@ sub error { =head2 $c->state -Contains the return value of the last executed action. +Contains the return value of the last executed action. Note that << $c->state >> operates in a scalar context which means that all values it returns are scalar. @@ -639,7 +638,13 @@ If you want to search for controllers, pass in a regexp as the argument. sub controller { my ( $c, $name, @args ) = @_; + my $appclass = ref($c) || $c; if( $name ) { + unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps + my $comps = $c->components; + my $check = $appclass."::Controller::".$name; + return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check}; + } my @result = $c->_comp_search_prefixes( $name, qw/Controller C/ ); return map { $c->_filter_component( $_, @args ) } @result if ref $name; return $c->_filter_component( $result[ 0 ], @args ); @@ -673,6 +678,11 @@ sub model { my ( $c, $name, @args ) = @_; my $appclass = ref($c) || $c; if( $name ) { + unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps + my $comps = $c->components; + my $check = $appclass."::Model::".$name; + return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check}; + } my @result = $c->_comp_search_prefixes( $name, qw/Model M/ ); return map { $c->_filter_component( $_, @args ) } @result if ref $name; return $c->_filter_component( $result[ 0 ], @args ); @@ -727,6 +737,11 @@ sub view { my $appclass = ref($c) || $c; if( $name ) { + unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps + my $comps = $c->components; + my $check = $appclass."::View::".$name; + return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check}; + } my @result = $c->_comp_search_prefixes( $name, qw/View V/ ); return map { $c->_filter_component( $_, @args ) } @result if ref $name; return $c->_filter_component( $result[ 0 ], @args ); @@ -803,7 +818,7 @@ component name will be returned. If Catalyst can't find a component by name, it will fallback to regex matching by default. To disable this behaviour set disable_component_resolution_regex_fallback to a true value. - + __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 ); =cut @@ -935,6 +950,8 @@ You can enable debug mode in several ways: =back +The first three also set the log level to 'debug'. + Calling C<< $c->debug(1) >> has no effect. =cut @@ -1145,7 +1162,6 @@ EOF my $name = $class->config->{name} || 'Application'; $class->log->info("$name powered by Catalyst $Catalyst::VERSION"); } - $class->log->_flush() if $class->log->can('_flush'); # Make sure that the application class becomes immutable at this point, B::Hooks::EndOfScope::on_scope_end { @@ -1170,26 +1186,32 @@ EOF ) unless $meta->is_immutable; }; + if ($class->config->{case_sensitive}) { + $class->log->warn($class . "->config->{case_sensitive} is set."); + $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81."); + } + $class->setup_finalize; + # Should be the last thing we do so that user things hooking + # setup_finalize can log.. + $class->log->_flush() if $class->log->can('_flush'); + return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE. } - =head2 $app->setup_finalize -A hook to attach modifiers to. -Using C<< after setup => sub{}; >> doesn't work, because of quirky things done for plugin setup. -Also better than C< setup_finished(); >, as that is a getter method. - - sub setup_finalize { +A hook to attach modifiers to. This method does not do anything except set the +C accessor. - my $app = shift; - - ## do stuff, i.e., determine a primary key column for sessions stored in a DB +Applying method modifiers to the C method doesn't work, because of quirky thingsdone for plugin setup. - $app->next::method(@_); +Example: + after setup_finalize => sub { + my $app = shift; - } + ## do stuff here.. + }; =cut @@ -1198,7 +1220,7 @@ sub setup_finalize { $class->setup_finished(1); } -=head2 $c->uri_for( $path, @args?, \%query_values? ) +=head2 $c->uri_for( $path?, @args?, \%query_values? ) =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? ) @@ -1206,6 +1228,10 @@ Constructs an absolute L object based on the application root, the provided path, and the additional arguments and query parameters provided. When used as a string, provides a textual URI. +If no arguments are provided, the URI for the current action is returned. +To return the current action and also provide @args, use +C<< $c->uri_for( $c->action, @args ) >>. + If the first argument is a string, it is taken as a public URI path relative to C<< $c->namespace >> (if it doesn't begin with a forward slash) or relative to the application root (if it does). It is then merged with @@ -1246,10 +1272,31 @@ sub uri_for { $path .= '/'; } + undef($path) if (defined $path && $path eq ''); + + my $params = + ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} ); + + carp "uri_for called with undef argument" if grep { ! defined $_ } @args; + foreach my $arg (@args) { + utf8::encode($arg) if utf8::is_utf8($arg); + } + s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args; + if (blessed $path) { # Action object only. + s|/|%2F|g for @args; + } + if ( blessed($path) ) { # action object - my $captures = ( scalar @args && ref $args[0] eq 'ARRAY' - ? shift(@args) - : [] ); + my $captures = [ map { s|/|%2F|g; $_; } + ( scalar @args && ref $args[0] eq 'ARRAY' + ? @{ shift(@args) } + : ()) ]; + + foreach my $capture (@$captures) { + utf8::encode($capture) if utf8::is_utf8($capture); + $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go; + } + my $action = $path; $path = $c->dispatcher->uri_for_action($action, $captures); if (not defined $path) { @@ -1262,12 +1309,6 @@ sub uri_for { undef($path) if (defined $path && $path eq ''); - my $params = - ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} ); - - carp "uri_for called with undef argument" if grep { ! defined $_ } @args; - s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args; - unshift(@args, $path); unless (defined $path && $path =~ s!^/!!) { # in-place strip @@ -1327,6 +1368,20 @@ $c->uri_for >>. You can also pass in a Catalyst::Action object, in which case it is passed to C<< $c->uri_for >>. +Note that although the path looks like a URI that dispatches to the wanted action, it is not a URI, but an internal path to that action. + +For example, if the action looks like: + + package MyApp::Controller::Users; + + sub lst : Path('the-list') {} + +You can use: + + $c->uri_for_action('/users/lst') + +and it will create the URI /users/the-list. + =back =cut @@ -1459,7 +1514,7 @@ sub welcome_message { models, and views; they can save you a lot of work.

- 
script/${prefix}_create.pl -help
+ 
script/${prefix}_create.pl --help

Also, be sure to check out the vast and growing collection of plugins for Catalyst on CPAN; you are likely to find what you need there. @@ -1702,6 +1757,8 @@ sub finalize { $c->finalize_body; } + $c->log_response; + if ($c->use_stats) { my $elapsed = sprintf '%f', $c->stats->elapsed; my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed; @@ -1779,7 +1836,7 @@ sub finalize_headers { } else { # everything should be bytes at this point, but just in case - $response->content_length( bytes::length( $response->body ) ); + $response->content_length( length( $response->body ) ); } } @@ -1834,7 +1891,7 @@ namespaces. sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) } -=head2 $c->handle_request( $class, @arguments ) +=head2 $app->handle_request( @arguments ) Called to handle each HTTP request. @@ -1894,7 +1951,7 @@ sub prepare { #surely this is not the most efficient way to do things... $c->stats($class->stats_class->new)->enable($c->use_stats); - if ( $c->debug ) { + if ( $c->debug || $c->config->{enable_catalyst_header} ) { $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION ); } @@ -1926,8 +1983,7 @@ sub prepare { $path = '/' unless length $path; my $address = $c->req->address || ''; - $c->log->debug(qq/"$method" request for "$path" from "$address"/) - if $c->debug; + $c->log_request; $c->prepare_action; @@ -1957,17 +2013,6 @@ sub prepare_body { $c->engine->prepare_body( $c, @_ ); $c->prepare_parameters; $c->prepare_uploads; - - if ( $c->debug && keys %{ $c->req->body_parameters } ) { - my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] ); - for my $key ( sort keys %{ $c->req->body_parameters } ) { - my $param = $c->req->body_parameters->{$key}; - my $value = defined($param) ? $param : ''; - $t->row( $key, - ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value ); - } - $c->log->debug( "Body Parameters are:\n" . $t->draw ); - } } =head2 $c->prepare_body_chunk( $chunk ) @@ -2051,55 +2096,156 @@ sub prepare_query_parameters { my $c = shift; $c->engine->prepare_query_parameters( $c, @_ ); +} - if ( $c->debug && keys %{ $c->request->query_parameters } ) { - my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] ); - for my $key ( sort keys %{ $c->req->query_parameters } ) { - my $param = $c->req->query_parameters->{$key}; - my $value = defined($param) ? $param : ''; - $t->row( $key, - ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value ); - } - $c->log->debug( "Query Parameters are:\n" . $t->draw ); +=head2 $c->log_request + +Writes information about the request to the debug logs. This includes: + +=over 4 + +=item * Request method, path, and remote IP address + +=item * Query keywords (see L) + +=item * Request parameters + +=item * File uploads + +=back + +=cut + +sub log_request { + my $c = shift; + + return unless $c->debug; + + my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these; + my $request = $dump->[1]; + + my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address ); + $method ||= ''; + $path = '/' unless length $path; + $address ||= ''; + $c->log->debug(qq/"$method" request for "$path" from "$address"/); + + $c->log_request_headers($request->headers); + + if ( my $keywords = $request->query_keywords ) { + $c->log->debug("Query keywords are: $keywords"); } + + $c->log_request_parameters( query => $request->query_parameters, body => $request->body_parameters ); + + $c->log_request_uploads($request); } -=head2 $c->prepare_read +=head2 $c->log_response -Prepares the input for reading. +Writes information about the response to the debug logs by calling +C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>. =cut -sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) } +sub log_response { + my $c = shift; -=head2 $c->prepare_request + return unless $c->debug; -Prepares the engine request. + my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these; + my $response = $dump->[1]; + + $c->log_response_status_line($response); + $c->log_response_headers($response->headers); +} + +=head2 $c->log_response_status_line($response) + +Writes one line of information about the response to the debug logs. This includes: + +=over 4 + +=item * Response status code + +=item * Content-Type header (if present) + +=item * Content-Length header (if present) + +=back =cut -sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) } +sub log_response_status_line { + my ($c, $response) = @_; -=head2 $c->prepare_uploads + $c->log->debug( + sprintf( + 'Response Code: %s; Content-Type: %s; Content-Length: %s', + $response->status || 'unknown', + $response->headers->header('Content-Type') || 'unknown', + $response->headers->header('Content-Length') || 'unknown' + ) + ); +} -Prepares uploads. +=head2 $c->log_response_headers($headers); + +Hook method which can be wrapped by plugins to log the responseheaders. +No-op in the default implementation. =cut -sub prepare_uploads { - my $c = shift; +sub log_response_headers {} - $c->engine->prepare_uploads( $c, @_ ); +=head2 $c->log_request_parameters( query => {}, body => {} ) + +Logs request parameters to debug logs + +=cut + +sub log_request_parameters { + my $c = shift; + my %all_params = @_; + + return unless $c->debug; - if ( $c->debug && keys %{ $c->request->uploads } ) { + my $column_width = Catalyst::Utils::term_width() - 44; + foreach my $type (qw(query body)) { + my $params = $all_params{$type}; + next if ! keys %$params; + my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] ); + for my $key ( sort keys %$params ) { + my $param = $params->{$key}; + my $value = defined($param) ? $param : ''; + $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value ); + } + $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw ); + } +} + +=head2 $c->log_request_uploads + +Logs file uploads included in the request to the debug logs. +The parameter name, filename, file type, and file size are all included in +the debug logs. + +=cut + +sub log_request_uploads { + my $c = shift; + my $request = shift; + return unless $c->debug; + my $uploads = $request->uploads; + if ( keys %$uploads ) { my $t = Text::SimpleTable->new( [ 12, 'Parameter' ], [ 26, 'Filename' ], [ 18, 'Type' ], [ 9, 'Size' ] ); - for my $key ( sort keys %{ $c->request->uploads } ) { - my $upload = $c->request->uploads->{$key}; + for my $key ( sort keys %$uploads ) { + my $upload = $uploads->{$key}; for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) { $t->row( $key, $u->filename, $u->type, $u->size ); } @@ -2108,6 +2254,68 @@ sub prepare_uploads { } } +=head2 $c->log_request_headers($headers); + +Hook method which can be wrapped by plugins to log the request headers. +No-op in the default implementation. + +=cut + +sub log_request_headers {} + +=head2 $c->log_headers($type => $headers) + +Logs L (either request or response) to the debug logs. + +=cut + +sub log_headers { + my $c = shift; + my $type = shift; + my $headers = shift; # an HTTP::Headers instance + + return unless $c->debug; + + my $column_width = Catalyst::Utils::term_width() - 28; + my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] ); + $headers->scan( + sub { + my ( $name, $value ) = @_; + $t->row( $name, $value ); + } + ); + $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw ); +} + + +=head2 $c->prepare_read + +Prepares the input for reading. + +=cut + +sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) } + +=head2 $c->prepare_request + +Prepares the engine request. + +=cut + +sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) } + +=head2 $c->prepare_uploads + +Prepares uploads. + +=cut + +sub prepare_uploads { + my $c = shift; + + $c->engine->prepare_uploads( $c, @_ ); +} + =head2 $c->prepare_write Prepares the output for writing. @@ -2208,8 +2416,11 @@ sub setup_components { } for my $component (@comps) { - $class->components->{ $component } = $class->setup_component($component); - for my $component ($class->expand_component_module( $component, $config )) { + my $instance = $class->components->{ $component } = $class->setup_component($component); + my @expanded_components = $instance->can('expand_modules') + ? $instance->expand_modules( $component, $config ) + : $class->expand_component_module( $component, $config ); + for my $component (@expanded_components) { next if $comps{$component}; $class->_controller_init_base_classes($component); # Also cover inner packages $class->components->{ $component } = $class->setup_component($component); @@ -2572,17 +2783,14 @@ the plugin name does not begin with C. my ( $proto, $plugin, $instant ) = @_; my $class = ref $proto || $proto; + # FIXME: also pass along plugin options as soon as the mop has it Class::MOP::load_class( $plugin ); - + $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is decated and will not work in 5.81" ) + if $plugin->isa( 'Catalyst::Component' ); $proto->_plugins->{$plugin} = 1; unless ($instant) { - no strict 'refs'; - if ( my $meta = Class::MOP::get_metaclass_by_name($class) ) { - my @superclasses = ($plugin, $meta->superclasses ); - $meta->superclasses(@superclasses); - } else { - unshift @{"$class\::ISA"}, $plugin; - } + my $meta = Class::MOP::get_metaclass_by_name($class); + $meta->superclasses($plugin, $meta->superclasses); } return $class; } @@ -2591,22 +2799,30 @@ the plugin name does not begin with C. my ( $class, $plugins ) = @_; $class->_plugins( {} ) unless $class->_plugins; - $plugins ||= []; + $plugins = Data::OptList::mkopt($plugins || []); - my @plugins = Catalyst::Utils::resolve_namespace($class . '::Plugin', 'Catalyst::Plugin', @$plugins); + my @plugins = map { + [ Catalyst::Utils::resolve_namespace( + $class . '::Plugin', + 'Catalyst::Plugin', $_->[0] + ), + $_->[1], + ] + } @{ $plugins }; for my $plugin ( reverse @plugins ) { - Class::MOP::load_class($plugin); - my $meta = find_meta($plugin); + Class::MOP::load_class($plugin->[0]); + # pass along $plugin->[1] as well once cmop supports it + my $meta = find_meta($plugin->[0]); next if $meta && $meta->isa('Moose::Meta::Role'); - $class->_register_plugin($plugin); + $class->_register_plugin($plugin->[0]); } my @roles = - map { $_->name } - grep { $_ && blessed($_) && $_->isa('Moose::Meta::Role') } - map { find_meta($_) } + map { $_->[0]->name, $_->[1] } + grep { $_->[0] && blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') } + map { [find_meta($_->[0]), $_->[1]] } @plugins; Moose::Util::apply_all_roles( @@ -2672,16 +2888,11 @@ There are a number of 'base' config variables which can be set: =item * -C - Makes private paths case sensitive. See L. - -=item * - -C - The default model picked if you say C<< $c->model >>. See Lmodel($name)>. +C - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>. =item * -C - The default view to be rendered or returned when C<< $c->view >>. See Lview($name)>. -is called. +C - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>. =item * @@ -2743,16 +2954,6 @@ action table, but you can make them visible with a config parameter. MyApp->config(show_internal_actions => 1); -=head1 CASE SENSITIVITY - -By default Catalyst is not case sensitive, so C is -mapped to C. You can activate case sensitivity with a config -parameter. - - MyApp->config(case_sensitive => 1); - -This causes C to map to C. - =head1 ON-DEMAND PARSER The request body is usually parsed at the beginning of a request, @@ -2892,6 +3093,8 @@ David Naughton, C David E. Wheeler +dhoss: Devin Austin + dkubb: Dan Kubb Drew Taylor @@ -2954,6 +3157,8 @@ numa: Dan Sully obra: Jesse Vincent +Octavian Rasnita + omega: Andreas Marienborg Oleg Kostyuk @@ -2968,6 +3173,8 @@ Robert Sedlacek C<< >> sky: Arthur Bergman +szbalint: Balint Szilakszi + t0m: Tomas Doran Ulf Edvinsson