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#
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# URLclass.pm
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#
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# Originally Written by Christopher Williams
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#
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# Description
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#
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# Interface
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# ---------
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# new(url) : A new URLclass object
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# origurl() : retunr the original url without any expansion
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# url() : return the full url name with all expansion
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# expandurl(URLbase) : expand the url to include the given base
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# file() : return the filename from the end of the path
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# base() : return the basename of the path
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# fullfile() : return base/file
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# param(var) : return the value of a url parameter
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#
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# -- specialised use methods
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# type() : get/set the url type
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# vars() : get/set the vars hash
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# base(base) : push a base into the url path if it dosnt already match
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# transfervars(varhash) : transfer any variables from varhash into vars
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# only if they do not already exist
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package URL::URLclass;
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require 5.004;
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sub new {
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my $class=shift;
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$self={};
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bless $self, $class;
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$self->{vars}={};
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$self->{origurl}=shift;
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$self->_url($self->{origurl});
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return $self;
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}
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sub origurl {
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my $self=shift;
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return $self->{origurl};
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}
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sub type {
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my $self=shift;
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@_?$self->{type}=shift
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:$self->{type};
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}
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sub vars {
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my $self=shift;
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@_?$self->{vars}=shift
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:$self->{vars};
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}
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sub expandurl {
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my $self=shift;
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my $base=shift;
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$self->{vars}={};
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$self->_url($self->{origurl}); # reset the current url;
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$self->transfervars($base->cmds());
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$self->_base($base->base());
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}
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sub url {
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my $self=shift;
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my $vars=$self->_vartostring();
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my $base=$self->base();
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print "base= $base\n";
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my $fullurl=$self->type()."://".(($base ne "")?$base."/":"").
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$self->file().(($vars ne "")?"\?".$vars:"");
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return $fullurl;
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}
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sub transfervars {
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my $self=shift;
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my $basevars=shift;
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foreach $key ( keys %$basevars ) {
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if ( ! exists $self->{vars}{$key} ) {
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$self->{vars}{$key}=$$basevars{$key};
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}
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}
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}
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sub fullfile {
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my $self=shift;
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return $self->{server}
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}
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sub base {
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my $self=shift;
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my $base="";
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if ( $self->{server}=~/\/\// ) {
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($base=$self->{server})=~s/(.*)\/\/.*/$1/;
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}
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elsif ( $self->{server}=~/\// ) {
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($base=$self->{server})=~s/(.*)\/.*/$1/;
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}
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return $base;
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}
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sub file {
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my $self=shift;
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my $file;
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if ( $self->{server}=~/\/\// ) {
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($file=$self->{server})=~s/.*\/\/(.*)/$1/;
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}
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elsif ( $self->{server}=~/\// ) {
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($file=$self->{server})=~s/.*\///g;
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}
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else {
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$file=$self->{server};
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}
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return $file;
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}
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sub param {
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my $self=shift;
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my $param=shift;
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$self->{vars}{$param};
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}
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#
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# --- Support Routines
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#
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# push a base name into the url string
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sub _base {
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my $self=shift;
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if ( @_ ) {
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my $server=shift;
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if ( ($server ne "") && ($self->{server}!~/\/\//) &&
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($self->{server}!~/$server/) ) {
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# only set if not already in there
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$self->{server}=$server."\/\/".$self->{server};
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}
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}
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return $self->{server};
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}
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sub _vartostring {
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my $self=shift;
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my $string="";
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foreach $key ( sort(keys %{$self->{vars}}) ) {
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$string=$string.(($string eq "")?"":"\&").$key."=".$self->{vars}{$key};
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}
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return $string;
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}
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sub _splitvarstring {
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my $self=shift;
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my $varstring=shift;
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my @pairs=split /\&/, $varstring;
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foreach $pair ( @pairs ) {
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my ($var,$val)= split /=/, $pair;
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$self->{vars}{$var}=$val;
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}
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}
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sub _url {
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my $self=shift;
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my $url=shift;
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my @rest;
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($self->{type}, @rest)= split ":", $url;
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my $tmp=join ':' ,@rest;
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($self->{server}, @varsarray)=split /\?/, $tmp;
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my $varstring=join '?' ,@varsarray;
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$self->{server}=~s/^\/\///;
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if ( $varstring ) { $self->_splitvarstring($varstring);}
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}
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