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root/cvsroot/COMP/SCRAM/src/URL/URLhandler.pm

Comparing COMP/SCRAM/src/URL/URLhandler.pm (file contents):
Revision 1.2 by williamc, Mon Aug 23 15:54:10 1999 UTC vs.
Revision 1.15.2.4 by williamc, Wed Aug 9 13:48:06 2000 UTC

#	Line 1 | Line 1
1	–	# url handler -> returns the location of the file
2	–	#
1		# Interface
2		# ---------
3	<	# new() :
4	<	# new(cachedir)       : A new urlhandler with a defined default cahce directory
5	<	# get(url)            : download from the specified url to the default cache
6	<	# get(url,location)   : download to the specified directory
7	<	# setbase(type,@args) : set the url defaults for a specific url type
8	<	#                       arguments are dependent on type
11	<	#                       http:
12	<	#                       file:
13	<	#                       cvs: servername,servertype [ ,user,passkey ]
14	<	#                       label:
3	>	# new(cache)       : A new urlhandler with a defined default cahce directory
4	>	# download(url,[location]) : as get but always download
5	>	# get(url,[location]) : download from the specified url to cache or location
6	>	#                       return the full url path name incl. any base expansion
7	>	#                       and the filename downloaded to
8	>	# setbase(urlstring) : set a base url type - return the url object
9		# unsetbase(type)  : deactivate a previously set base
10	+	# currentbase(type) : return the current base for the given type
11	+	# expandurl(urlstring) : return the base expanded URLclass of the given string
12		#
13		# ----------------------------------------------------------------------
18	–	# returns file location - or crashes out
19	–	# can pass a file name for the item to be stored as
20	–	# if not then stores in a default cache.
14
15	<	package URLhandler;
15	>	package URL::URLhandler;
16		require 5.004;
17		use Utilities::AddDir;
18	+	use URL::URLcache;
19	+	use URL::URLclass;
20		use Carp;
21
22		sub new {
#	Line 37 | Line 32 | sub init {
32		use Utilities::AddDir;
33		my $self=shift;
34		my $cache=shift;
40	–	if (! defined $cache  ) { $cache="/tmp/SCRAMcache" }; # default cache
41	–	AddDir::adddir($cache);
35		$self->{cache}=$cache;
36	+	$self->{cachestore}=$self->{cache}->filestore();
37		use URL::URL_cvs;
38		use URL::URL_file;
39	+	use URL::URL_test;
40		$self->{urlmodules}={
41	<	'cvs' => 'URL_cvs',
42	<	'file' => 'URL_file'
41	>	'cvs' => 'URL::URL_cvs',
42	>	'file' => 'URL::URL_file',
43	>	'test' => 'URL::URL_test'
44		};
49	–	$self->{filebase}="";
50	–	$self->setbase("file", {}); # Base file as default
45		}
46
47	<	sub get ($@) {
47	>	sub get {
48		my $self=shift;
49		my $origurl=shift;
50	<	my $filename=shift;
51	<	my $rest;
52	<	my $type;
53	<	my $url;
54	<	my $version;
55	<
56	<	if ( ! defined $filename ) {
57	<	$filename=$self->{cache};
58	<	}
59	<	chomp $origurl;
66	<	# get our version info from the url (after last ??)
67	<	( $url, $version) = split /\?\?/, $origurl;
68	<	if ( $url=~/:/ ) {
69	<	($type,$rest) = split /:/, $url;
70	<	}
71	<	else {
72	<	$type='label';
73	<	$rest=$url.":".$version;
74	<	}
75	<	if ( ! ( exists $self->{'urlmodules'}{$type}) ) {
76	<	print "URLhandler: Unsupported type $type\n";
77	<	carp;
78	<	}
79	<	else {
80	<	eval{${$self->{urlostack}{$type}}[$#{$self->{urlostack}{$type}}]}->
81	<	get($rest, $filename);
50	>	my $file="";
51	>
52	>	my $url=URL::URLclass->new($origurl);
53	>	my $type=$url->type();
54	>	$url->merge($self->currentbase($type));
55	>	my $fullurl=$url->url();
56	>
57	>	$file=$self->{cache}->file($fullurl);
58	>	if ( $file eq "" ) {
59	>	($fullurl,$file)=$self->download($origurl, @_);
60		}
61	+	return ($fullurl, $file);
62		}
63
64	<	sub setbase {
64	>	sub download {
65		my $self=shift;
66	<	my $type=shift;
88	<	my @args=@_;
89	<	my $oref;
66	>	my $origurl=shift;
67
68	<	# Check type is supported
69	<	if ( ! exists $self->{urlmodules}{$type} ) {
70	<	print "URLhandler error: Unsupported type $type\n";
71	<	return 1;
68	>	# Process the URL string
69	>	my $url=URL::URLclass->new($origurl);
70	>	my $type=$url->type();
71	>	$urltypehandler=$self->_typehandler($type);
72	>	$url->merge($self->currentbase($type));
73	>	print "Attempting download of ".$url->url()."\n";
74	>
75	>	# Generate a location name if not provided
76	>	$nocache=1;
77	>	if ( @_ ) {
78	>	$location=shift;
79	>	$nocache=0; # dont cache if downloaded to an external location
80		}
81		else {
82	<	# A new URL object - pushed onto the stack
98	<	$oref=eval{$self->{urlmodules}{$type}}->new();
99	<	push @{$self->{urlostack}{$type}}, $oref;
100	<	$oref->setbase(@args);
82	>	$location=$self->{cache}->filename($url->url());
83		}
84	+	# -- get the file from the appropriate handler
85	+	if ( defined $urltypehandler ) {
86	+	# Call the download module
87	+	$file=eval{$urltypehandler->get($url, $location)};
88	+	}
89	+
90	+	# now register it in the cache if successful
91	+	if ( $file && $nocache) {
92	+	$self->{cache}->store($url->url(), $location);
93	+	}
94	+	return ($url->url(), $file);
95	+	}
96	+
97	+	sub expandurl {
98	+	my $self=shift;
99	+	my $urlstring=shift;
100	+
101	+	my $url=URL::URLclass->new($urlstring);
102	+	my $type=$url->type();
103	+	$url->merge($self->currentbase($type));
104	+	return $url;
105	+	}
106	+
107	+	sub setbase {
108	+	my $self=shift;
109	+	my $partialurl=shift;
110	+
111	+	my $base=URL::URLclass->new($partialurl);
112	+	my $type=$base->type();
113	+	$self->checktype($type);
114	+	# make a new base-url object
115	+	push @{$self->{"basestack"}{$type}}, $base;
116	+	return $base;
117		}
118
119		sub unsetbase {
#	Line 106 | Line 121 | sub unsetbase {
121		my $type=shift;
122		my $oref;
123
124	<	# Check type is supported
124	>	$self->checktype($type);
125	>	# pop off the stack and call the unset base method
126	>	if ( $#{$self->{basestack}{$type}} >=0 ) {
127	>	my $base=pop @{$self->{basestack}{$type}};
128	>	undef $base;
129	>	}
130	>	else {
131	>	die "URLhandler error: Unable to unset type $type\n";
132	>	}
133	>	# remove the stack if its empty
134	>	if ( $#{$self->{basestack}{$type}} == -1 ) {
135	>	delete $self->{basestack}{$type};
136	>	}
137	>	}
138	>
139	>	sub currentbase {
140	>	my $self=shift;
141	>	my $type=shift;
142	>	my $rv;
143	>
144	>	if ( exists $self->{basestack}{$type} ) {
145	>	$rv=${$self->{basestack}{$type}}[$#{$self->{basestack}{$type}}];
146	>	}
147	>	else {
148	>	$rv=undef;
149	>	}
150	>	return $rv;
151	>	}
152	>
153	>	sub checktype($type) {
154	>	my $self=shift;
155	>	my $type=shift;
156	>
157	>	# Check type is supported
158		if ( ! exists $self->{urlmodules}{$type} ) {
159	<	print "URLhandler error: Unsupported type $type\n";
112	<	return 1;
113	<	}
114	<	else {
115	<	# pop off the stack and call the unset base method
116	<	if ( $#{$self->{urlostack}{$type}} >=0 ) {
117	<	$oref=pop @{$self->{urlostack}{$type}};
118	<	$oref->unsetbase();
119	<	undef $oref;
120	<	}
121	<	else {
122	<	print "URLhandler error: Unable to unset type $type\n";
123	<	return 1;
124	<	}
159	>	die "URLhandler error: Unsupported type $type\n";
160		}
161		}
162
163	<	# ------------------------ General Support Routines ----------------------------
163	>	sub _typehandler {
164	>	my $self=shift;
165	>	my $type=shift;
166	>
167	>	$self->checktype($type);
168
169	<	sub cachefilename {
170	<	my $self=shift;
171	<	use File::Basename;
172	<	use Utilities::AddDir;
173	<	my $filebase=dirname($rest);
174	<	$cache="/tmp/williamc/urlhandler$$";
175	<	adddir($cache);
137	<	$filename=$cache."/".$filebase;
169	>	# instantiate only if it dosnt already exist;
170	>	if ( exists $self->{'urlobjs'}{$type} ) {
171	>	$self->{'urlobjs'}{$type};
172	>	}
173	>	else {
174	>	$self->{'urlobjs'}{$type}=$self->{urlmodules}{$type}->new();
175	>	}
176		}
139	–

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