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# Interface |
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# --------- |
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# new(cache) : A new urlhandler with a defined default cahce directory |
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# download(url,[location]) : as get but always download |
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# get(url,[location]) : download from the specified url to cache or location |
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# return the full url path name incl. any base expansion |
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# and the filename downloaded to |
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# currentbase(type) : return the current base for the given type |
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# |
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# ---------------------------------------------------------------------- |
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# returns file location - or crashes out |
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# can pass a file name for the item to be stored as |
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# if not then stores in a default cache. |
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package URL::URLhandler; |
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require 5.004; |
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use URL::URL_cvs; |
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use URL::URL_cvsfile; |
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use URL::URL_file; |
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use URL::URL_test; |
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use URL::URL_filed; |
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$self->{urlmodules}={ |
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'cvsfile' => 'URL::URL_cvsfile', |
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'cvs' => 'URL::URL_cvs', |
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'file' => 'URL::URL_file', |
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'filed' => 'URL::URL_filed' |
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'filed' => 'URL::URL_filed', |
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'test' => 'URL::URL_test' |
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}; |
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$self->{filebase}=""; |
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$self->setbase("file", {}); # Base file as default |
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$self->setbase("filed", {}); # Base file as default |
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} |
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sub get { |
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my $self=shift; |
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my $origurl=shift; |
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my $file=""; |
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# Process the URL string |
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$url=URL::URLclass->new($origurl); |
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my $url=URL::URLclass->new($origurl); |
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my $type=$url->type(); |
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$url->expandurl($self->currentbase($type)); |
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my $fullurl=$url->url(); |
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|
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$file=$self->{cache}->file($fullurl); |
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if ( $file eq "" ) { |
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($fullurl,$file)=$self->download($origurl, @_); |
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} |
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return ($fullurl, $file); |
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} |
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|
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sub download { |
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my $self=shift; |
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my $origurl=shift; |
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|
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# Process the URL string |
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my $url=URL::URLclass->new($origurl); |
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my $type=$url->type(); |
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$urltypehandler=$self->_typehandler($type); |
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$url->expandurl($self->currentbase($type)); |
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# Generate a location name if not provided |
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$nocache=1; |
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if ( @_ ) { |
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$location=shift; |
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$nocache=0; # dont cache if downloaded to an external location |
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} |
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else { |
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$location=$self->{cache}->filename($url->url()); |
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} |
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# -- get the file form the appropriate handler |
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# -- get the file from the appropriate handler |
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if ( defined $urltypehandler ) { |
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# Call the download module |
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$file=eval{$urltypehandler->get($url, $location)}; |
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} |
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# now register it in the cache if successful |
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if ( $file ) { |
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$self->{cache}->store($fullurl, $rv); |
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if ( $file && $nocache) { |
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$self->{cache}->store($url->url(), $location); |
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} |
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< |
return ($fullurl, $file); |
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return ($url->url(), $file); |
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} |
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sub setbase { |
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$self->checktype($type); |
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# make a new base object |
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my $base=URL::URLbase->new(@_); |
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push @{$self->{basestack}{$type}}, $base; |
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push @{$self->{"basestack"}{$type}}, $base; |
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} |
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sub unsetbase { |
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else { |
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die "URLhandler error: Unable to unset type $type\n"; |
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} |
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# remove the stack if its empty |
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if ( $#{$self->{basestack}{$type}} == -1 ) { |
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delete $self->{basestack}{$type}; |
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} |
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} |
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sub currentbase { |
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my $rv; |
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if ( exists $self->{basestack}{$type} ) { |
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$rv=$self->{basestack}{$type}[$#$self->{basestack}{$type}]; |
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$rv=${$self->{basestack}{$type}}[$#{$self->{basestack}{$type}}]; |
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} |
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else { |
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$rv=$self->{dummybase}; |
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$self->checktype($type); |
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# instantiate only if it dosnt already exist; |
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(exists $self->{urlobjs}{$type})?$self->{urlobjs}{$type} |
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:$self->{urlobjs}{$type}=$self->{urlmodules}{$type}->new(); |
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> |
if ( exists $self->{'urlobjs'}{$type} ) { |
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$self->{'urlobjs'}{$type}; |
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} |
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else { |
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$self->{'urlobjs'}{$type}=$self->{urlmodules}{$type}->new(); |
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} |
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} |
