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# url handler -> returns the location of the file |
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# |
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# Interface |
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# --------- |
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# new() : |
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# new(cachedir) : A new urlhandler with a defined default cahce directory |
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# get(url) : download from the specified url to the default cache |
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# get(url,dirlocation) : download to the specified directory |
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# new(cache) : A new urlhandler with a defined default cahce directory |
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# get(url) : download from the specified url to the default cache |
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# getto(url,dirlocation): download to the specified directory - no cache registry |
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# setbase(type,variablehash) : set the url defaults for a specific url type |
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# arguments are dependent on type |
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# unsetbase(type) : deactivate a previously set base |
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# setcache(dir) : set the default cache location |
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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 URLhandler; |
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package URL::URLhandler; |
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require 5.004; |
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use Utilities::AddDir; |
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use URL::URLUtilities; |
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use URL::URL_base; |
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use Carp; |
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} |
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sub init { |
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use URL::URLcache; |
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use Utilities::AddDir; |
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my $self=shift; |
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my $cache=shift; |
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if (! defined $cache ) { $cache="/tmp/SCRAMcache" }; # default cache |
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AddDir::adddir($cache); |
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$self->{cache}=$cache; |
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$self->{cachestore}=$self->{cache}->filestore(); |
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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_filed; |
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$self->{urlmodules}={ |
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'cvs' => 'URL_cvs', |
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'file' => 'URL_file' |
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'cvsfile' => 'URL::URL_cvsfile', |
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'cvs' => 'URL::URL_cvs', |
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'file' => 'URL::URL_file', |
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'filed' => 'URL::URL_filed' |
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}; |
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$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 setcache { |
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# |
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sub get { |
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my $self=shift; |
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my $cache=shift; |
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my $url=shift; |
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$self->{cache}=$cache; |
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my ($urlstring, $type, $urltypehandler, $base, $version) |
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=$self->_urlexpand($url); # get a unique url string |
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my $rv=""; |
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$rv=$self->getto($url,$self->{cache}->filename($urlstring)); |
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# now register it in the cache if successful |
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if ( $rv ne "" ) { |
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$self->{cache}->store($urlstring, $rv); |
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} |
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return $rv; |
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} |
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sub get ($@) { |
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sub getto ($@) { |
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my $self=shift; |
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my $origurl=shift; |
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my $dirname=shift; |
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my $rest; |
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my $type; |
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my $url; |
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my $version; |
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my $rv=""; |
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if ( ! defined $dirname ) { |
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$dirname=$self->{cache}; |
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} |
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print "dirname = $dirname \n"; |
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chdir $dirname or carp "Unable to Enter Directory $dirname $!\n"; |
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chomp $origurl; |
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# get our version info from the url (after last ??) |
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( $url, $version) = split /\?\?/, $origurl; |
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if ( $url=~/:/ ) { |
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($type,$rest) = split /:/, $url; |
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} |
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else { |
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$type='label'; |
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$rest=$url.":".$version; |
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} |
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if ( ! ( exists $self->{'urlmodules'}{$type}) ) { |
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print "URLhandler: Unsupported type $type\n"; |
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carp; |
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} |
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else { |
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if ( $#{$self->{urlostack}{$type}} < 0 ) { |
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print "URLhandler : base not set for type $type \n"; |
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} |
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else { |
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$rv= |
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eval{${$self->{urlostack}{$type}}[$#{$self->{urlostack}{$type}}]}-> |
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get($rest); |
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} |
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} |
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if ( $rv ne "" ) { |
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$rv=$dirname."/".$rv; |
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# Process the URL string |
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my ($type,$rest,$version)=URLUtilities::parseURL($origurl); |
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my ($urltypehandler, $base)=$self->_typecheck($type); |
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if ( defined $urltypehandler ) { |
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# Call the download module |
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$rv=eval{$urltypehandler->get($rest.(($version ne "")?"\?".$version:""), $dirname); }; |
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} |
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return $rv; |
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} |
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} |
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} |
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# ------------------------ General Support Routines ---------------------------- |
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# -------------------- Support Routines (private Methods) ------------- |
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|
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# |
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# Process the URL string into its component parts |
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# |
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sub _typecheck { |
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my $self=shift; |
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my $type=shift; |
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my $base=""; |
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sub cachefilename { |
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my $self=shift; |
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use File::Basename; |
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use Utilities::AddDir; |
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my $filebase=dirname($rest); |
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$cache="/tmp/williamc/urlhandler$$"; |
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adddir($cache); |
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$filename=$cache."/".$filebase; |
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# check type are supported |
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if ( ! ( exists $self->{'urlmodules'}{$type}) ) { |
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print "URLhandler: Unsupported type $type\n"; |
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die; |
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} |
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else { |
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if ( $#{$self->{urlostack}{$type}} < 0 ) { |
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print "URLhandler : base not set for type $type \n"; |
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die; |
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} |
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else { |
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# ---- type is supported |
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$urltypehandler= |
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${$self->{urlostack}{$type}}[$#{$self->{urlostack}{$type}}]; |
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$base=$urltypehandler->baseurl(); |
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} |
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} |
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return $urltypehandler, $base; |
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} |
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|
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sub _urlexpand { |
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my $self=shift; |
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my $url=shift; |
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|
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my ($type,$rest,$cmds)=URLUtilities::parseURL($url); |
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my ($urltypehandler, $base)=$self->_typecheck($type); |
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|
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my $expurl=$type.":".($base ne ""?$base."/":"").$rest. |
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($cmds ne ""?"\?".$cmds:""); |
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return $expurl; |
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} |
