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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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# 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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# 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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# 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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# 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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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 URL::URLcache; |
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use URL::URLclass; |
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use URL::URLbase; |
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use Carp; |
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|
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sub new { |
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} |
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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 $cache=shift; |
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$self->{cache}=$cache; |
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$self->{dummybase}=URL::URLbase->new({}); |
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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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$self->setbase("filed", {}); # Base file as default |
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} |
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|
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# |
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sub get { |
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my $self=shift; |
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my $url=shift; |
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my ($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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|
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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 $rv; |
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} |
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|
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sub getto ($@) { |
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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 $rv=""; |
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# Process the URL string |
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my ($type,$rest,$version)=URLUtilities::parseURL($origurl); |
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my ($urltypehandler, $base)=$self->_typecheck($type); |
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$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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|
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# Generate a location name if not provided |
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if ( @_ ) { |
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$location=shift; |
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} |
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else { |
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$location=$self->{cache}->filename($url->url()); |
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} |
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|
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# -- get the file form the appropriate handler |
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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 $rv; |
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$file=eval{$urltypehandler->get($url, $location)}; |
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} |
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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, $rv); |
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} |
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return ($fullurl, $file); |
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} |
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sub setbase { |
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my @args=@_; |
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my $oref; |
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# Check type is supported |
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if ( ! exists $self->{urlmodules}{$type} ) { |
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print "URLhandler error: Unsupported type $type\n"; |
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return 1; |
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} |
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else { |
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# A new URL object - pushed onto the stack |
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$oref=eval{$self->{urlmodules}{$type}}->new(); |
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push @{$self->{urlostack}{$type}}, $oref; |
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$oref->setbase(@args); |
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} |
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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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} |
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sub unsetbase { |
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my $type=shift; |
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my $oref; |
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# Check type is supported |
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$self->checktype($type); |
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# pop off the stack and call the unset base method |
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if ( $#{$self->{basestack}{$type}} >=0 ) { |
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my $base=pop @{$self->{basestack}{$type}}; |
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> |
undef $base; |
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} |
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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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} |
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> |
|
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> |
sub currentbase { |
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my $self=shift; |
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my $type=shift; |
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my $rv; |
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|
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if ( exists $self->{basestack}{$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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} |
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return $rv; |
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> |
} |
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> |
|
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> |
sub checktype($type) { |
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my $self=shift; |
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> |
my $type=shift; |
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> |
|
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# Check type is supported |
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if ( ! exists $self->{urlmodules}{$type} ) { |
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< |
print "URLhandler error: Unsupported type $type\n"; |
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< |
return 1; |
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< |
} |
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< |
else { |
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< |
# pop off the stack and call the unset base method |
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< |
if ( $#{$self->{urlostack}{$type}} >=0 ) { |
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< |
$oref=pop @{$self->{urlostack}{$type}}; |
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< |
$oref->unsetbase(); |
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< |
undef $oref; |
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} |
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else { |
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print "URLhandler error: Unable to unset type $type\n"; |
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< |
return 1; |
| 129 |
< |
} |
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> |
die "URLhandler error: Unsupported type $type\n"; |
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} |
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} |
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|
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< |
# -------------------- Support Routines (private Methods) ------------- |
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< |
|
| 135 |
< |
# |
| 136 |
< |
# Process the URL string into its component parts |
| 137 |
< |
# |
| 138 |
< |
sub _typecheck { |
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> |
sub _typehandler { |
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my $self=shift; |
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my $type=shift; |
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|
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< |
my $base=""; |
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> |
$self->checktype($type); |
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|
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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"; |
| 147 |
< |
die; |
| 148 |
< |
} |
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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 |
| 156 |
< |
$urltypehandler= |
| 157 |
< |
${$self->{urlostack}{$type}}[$#{$self->{urlostack}{$type}}]; |
| 158 |
< |
$base=$urltypehandler->baseurl(); |
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< |
} |
| 160 |
< |
} |
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< |
|
| 162 |
< |
return $urltypehandler, $base; |
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< |
} |
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< |
|
| 165 |
< |
sub _urlexpand { |
| 166 |
< |
my $self=shift; |
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< |
my $url=shift; |
| 168 |
< |
|
| 169 |
< |
my ($type,$rest,$cmds)=URLUtilities::parseURL($url); |
| 170 |
< |
my ($urltypehandler, $base)=$self->_typecheck($type); |
| 171 |
< |
|
| 172 |
< |
my $expurl=$type.":".($base ne ""?$base."/":"").$rest. |
| 173 |
< |
($cmds ne ""?"\?".$cmds:""); |
| 174 |
< |
return $expurl; |
| 146 |
> |
# instantiate only if it dosnt already exist; |
| 147 |
> |
(exists $self->{urlobjs}{$type})?$self->{urlobjs}{$type} |
| 148 |
> |
:$self->{urlobjs}{$type}=$self->{urlmodules}{$type}->new(); |
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} |
