whatpm/Whatpm/CacheManifest.pm

package Whatpm::CacheManifest;
use strict;
our $VERSION=do{my @r=(q$Revision: 1.6 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
require Message::URI::URIReference;

sub parse_byte_string ($$$$;$$) {
  require Encode;
  my $s = Encode::decode ('utf-8', $_[1]);
  return $_[0]->_parse (\$s, $_[2], $_[3], $_[4] || sub {
    my %err = @_;
    warn $err{type}, "\n";
  }, $_[5]);
} # parse_byte_string

sub parse_char_string ($$$$;$$) {
  return $_[0]->_parse (\($_[1]), $_[2], $_[3], $_[4] || sub {
    my %err = @_;
    warn $err{type}, "\n";
  }, $_[5]);
} # parse_char_string

my $default_error_levels = {
  must => 'm',
  info => 'i',
};

sub _parse ($$$$$$) {
  #my (undef, $input, $manifest_uri, $base_uri, $onerror, $levels) = @_;

  ## NOTE: A manifest MUST be labeled as text/cache-manifest.  (This should
  ## be checked in upper-level).
  ## NOTE: No "MUST" for being UTF-8.
  ## NOTE: A |text/cache-manifest| MUST be a cache manifest.
  ## NOTE: Newlines MUST be CR/CRLF/LF.  (We don't and can't check this.)

  ## ISSUE: In RFC 2046: "The specification for any future subtypes of "text" must specify whether or not they will also utilize a "charset" parameter"

  my $m_uri = Message::DOM::DOMImplementation->create_uri_reference ($_[2]);
  my $m_scheme = $m_uri->uri_scheme;

  my $onerror = $_[4];
  my $levels = $_[5] || $default_error_levels;

  my $line_number = 1;

  ## Same origin with the manifest's URI
  my $same_origin = sub {
    ## NOTE: Step numbers in this function corresponds to those in the
    ## algorithm for determining the origin of a URI specified in HTML5.

    ## 1. and 2.
    my $u1 = shift;
    #my $m_uri = $m_uri;


    ## 3.
    return 0 unless defined $u1->uri_authority;
    return 0 unless defined $m_uri->uri_authority;
    ## TODO: In addition, in the case of URIs with non-server-based authority
    ## it must also return 0.
    
    ## 4.
    unless (lc $u1->uri_scheme eq lc $m_scheme) { ## TODO: case
      return 0;
    }
    ## TODO: Return if $u1->uri_scheme is not a supported scheme.
    ## NOTE: $m_scheme is always a supported URI scheme, otherwise
    ## the manifest itself cannot be retrieved.

    ## 5., 6., and 7.
    return 0 unless $u1->uri_host eq $m_uri->uri_host;
    ## TODO: IDNA ToASCII
 
    ## 8.
    return 0 unless $u1->uri_port eq $m_uri->uri_port;
    ## TODO: default port

    ## 9.
    return 1;
  }; # $same_origin

  ## Step 5
  my $input = $_[1];
  
  ## Step 1: MUST bytes --UTF-8--> characters.
  ## NOTE: illegal(s) -> U+FFFD, #U+0000 -> U+FFFD (commented out in r1553).
  #$$input =~ tr/\x00/\x{FFFD}/;

  ## Step 2
  my $explicit_uris = [];

  ## Step 3
  my $fallback_uris = {};

  ## Step 4
  my $online_whitelist_uris = [];

  ## Step 6
  pos ($$input) = 0;

  ## Step 7
  ## Skip BOM ## NOTE: MAY in syntax.

  ## Step 8-10
  unless ($$input =~ /^CACHE MANIFEST[\x20\x09]*(?![^\x0D\x0A])/gc) {
    $onerror->(type => 'not manifest', level => $levels->{must},
               line => $line_number, column => 1); ## NOTE: MUST in syntax.
    return; ## Not a manifest.
  }

  ## Step 11
  ## This is a cache manifest.

  ## Step 12
  my $mode = 'explicit';

  ## NOTE: MUST be (blank line|comment|section head|data for the current
  ## section)*.

  ## Step 13
  START_OF_LINE: while (pos $$input < length $$input) {
    $$input =~ /([\x0A\x0D\x20\x09]+)/gc;
    my $v = $1;
    $line_number++ for $v =~ /\x0D\x0A?|\x0A/g;

    ## Step 14
    $$input =~ /([^\x0A\x0D]*)/gc;
    my $line = $1;

    ## Step 15
    $line =~ s/[\x20\x09]+\z//;

    ## Step 16-17
    if ($line eq '' or $line =~ /^#/) {
      next START_OF_LINE;
    }

    if ($line eq 'CACHE:') {
      ## Step 18
      $mode = 'explicit';
      next START_OF_LINE;
    } elsif ($line eq 'FALLBACK:') {
      ## Step 19
      $mode = 'fallback';
      next START_OF_LINE;
    } elsif ($line eq 'NETWORK:') {
      ## Step 20
      $mode = 'online whitelist';
      next START_OF_LINE;
    }

    ## NOTE: "URIs that are to be fallback pages associated with
    ## opportunistic caching namespaces, and those namespaces themselves,
    ## MUST be given in fallback sections, with the namespace being the
    ## first URI of the data line, and the corresponding fallback page
    ## being the second URI. All the other pages to be cached MUST be
    ## listed in explicit sections." in writing section can't be tested.
    ## NOTE: "URIs that the user agent is to put into the online whitelist
    ## MUST all be specified in online whitelist sections." in writing
    ## section can't be tested.

    ## NOTE: "Relative URIs MUST be given relative to the manifest's own URI."
    ## requirement in writing section can't be tested.

    ## Step 21
    if ($mode eq 'explicit') {
      my $uri = Message::DOM::DOMImplementation->create_uri_reference ($line);

      unless ($uri->is_iri_reference_3987) {
        $onerror->(type => 'syntax error:iriref3987',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   value => $line);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }

      $uri = $uri->get_absolute_reference ($_[3]);

      if (defined $uri->uri_fragment) {
        $uri->uri_fragment (undef);
        $onerror->(type => 'URL fragment not allowed',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   value => $line);
        ## NOTE: MUST in writing section.
      }

      my $scheme = $uri->uri_scheme;
      unless (defined $scheme and $scheme eq $m_scheme) {
        $onerror->(type => 'different scheme from manifest',
                   level => $levels->{info},
                   line => $line_number, column => 1,
                   value => $uri->uri_reference);
        next START_OF_LINE;
      }

      push @$explicit_uris, $uri->uri_reference;
    } elsif ($mode eq 'fallback') {
      my ($p1, $p2) = split /[\x20\x09]+/, $line, 2;

      unless (defined $p2) {
        $onerror->(type => 'no fallback entry URL',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   value => $line);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }

      my $u1 = Message::DOM::DOMImplementation->create_uri_reference ($p1);

      unless ($u1->is_iri_reference_3987) {
        $onerror->(type => 'syntax error:iriref3987',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   index => 0, value => $p1);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }

      my $u2 = Message::DOM::DOMImplementation->create_uri_reference ($p2);

      unless ($u2->is_iri_reference_3987) {
        $onerror->(type => 'syntax error:iriref3987',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   index => 1, value => $p2);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }

      if (defined $u1->uri_fragment) {
        $u1->uri_fragment (undef);
        $onerror->(type => 'URL fragment not allowed',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   index => 0, value => $p1);
        ## NOTE: MUST in writing section.
      }

      if (defined $u2->uri_fragment) {
        $u2->uri_fragment (undef);
        $onerror->(type => 'URL fragment not allowed',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   index => 1, value => $p2);
        ## NOTE: MUST in writing section.
      }

      $u1 = $u1->get_absolute_reference ($_[3]);
      $u2 = $u2->get_absolute_reference ($_[3]);

      if (exists $fallback_uris->{$u1->uri_reference}) {
        $onerror->(type => 'duplicate oc namespace',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   index => 0, value => $u1->uri_reference);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }
      
      unless ($same_origin->($u1)) {
        $onerror->(type => 'different origin from manifest',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   index => 0, value => $u1->uri_reference);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }

      my $u2_scheme = $u2->uri_scheme;
      unless (defined $u2_scheme and $u2_scheme eq $m_scheme) {
        $onerror->(type => 'different scheme from manifest',
                   level => $levels->{info},
                   line => $line_number, column => 1,
                   index => 1, value => $u2->uri_reference);
        next START_OF_LINE;
      }

      $fallback_uris->{$u1->uri_reference} = $u2->uri_reference;
    } elsif ($mode eq 'online whitelist') {
      my $uri = Message::DOM::DOMImplementation->create_uri_reference ($line);

      unless ($uri->is_iri_reference_3987) {
        $onerror->(type => 'syntax error:iriref3987',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   value => $line);
        next START_OF_LINE; ## NOTE: MUST in syntax.
      }

      $uri = $uri->get_absolute_reference ($_[3]);

      if (defined $uri->uri_fragment) {
        $uri->uri_fragment (undef);
        $onerror->(type => 'URL fragment not allowed',
                   level => $levels->{must},
                   line => $line_number, column => 1,
                   value => $line);
        ## NOTE: MUST in writing section.
      }

      my $scheme = $uri->uri_scheme;
      unless (defined $scheme and $scheme eq $m_scheme) {
        $onerror->(type => 'different scheme from manifest',
                   level => $levels->{info},
                   line => $line_number, column => 1,
                   value => $uri->uri_reference);
        next START_OF_LINE;
      }

      push @$online_whitelist_uris, $uri->uri_reference;      
    }

    ## Step 22
    #next START_OF_LINE;
  } # START_OF_LINE

  ## Step 23
  return [$explicit_uris, $fallback_uris, $online_whitelist_uris,
          $m_uri->uri_reference];
} # _parse

sub check_manifest ($$$;$) {
  my (undef, $manifest, $onerror, $levels) = @_;

  my $listed = {};

  $levels ||= $default_error_levels;

  require Whatpm::URIChecker;

  my $i = 0;
  for my $uri (@{$manifest->[0]}) {
    $listed->{$uri} = 1;

    Whatpm::URIChecker->check_iri_reference ($uri, sub {
      $onerror->(value => $uri, @_, index => $i);
    });

    ## ISSUE: Literal equivalence, right?
    if ($uri eq $manifest->[3]) {
      $onerror->(level => $levels->{must}, value => $uri,
                 index => $i,
                 type => 'same as manifest URL');
    }

    $i++;
  }

  for my $uri1 (sort {$a cmp $b} keys %{$manifest->[1]}) {
    Whatpm::URIChecker->check_iri_reference ($uri1, sub {
      $onerror->(value => $uri1, @_, index => 0);
    });

    if ($uri1 eq $manifest->[3]) {
      $onerror->(level => $levels->{must}, value => $uri1,
                 index => $i,
                 type => 'same as manifest URL');
    }

    $i++;

    my $uri2 = $manifest->[1]->{$uri1};
    $listed->{$uri2} = 1;

    Whatpm::URIChecker->check_iri_reference ($uri2, sub {
      $onerror->(value => $uri2, @_, index => 1);
    });

    if ($uri2 eq $manifest->[3]) {
      $onerror->(level => $levels->{must}, value => $uri2,
                 index => $i,
                 type => 'same as manifest URL');
    }

    $i++;
  }

  for my $uri (@{$manifest->[2]}) {
    if ($listed->{$uri}) {
      $onerror->(type => 'both in entries and whitelist',
                 index => $i,
                 level => $levels->{must}, value => $uri);
      ## NOTE: MUST in writing section.
    }

    Whatpm::URIChecker->check_iri_reference ($uri, sub {
      $onerror->(value => $uri, @_, index => $i);
    });

    if ($uri eq $manifest->[3]) {
      $onerror->(level => $levels->{must}, value => $uri,
                 index => $i,
                 type => 'same as manifest URL');
    }

    $i++;
  }
} # check_manifest


=head1 LICENSE

Copyright 2007-2008 Wakaba <[email protected]>

This library is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.

=cut

1;
# $Date: 2008/05/16 13:56:16 $
1	wakaba	1.1	package Whatpm::CacheManifest;
2			use strict;
3	wakaba	1.7	our $VERSION=do{my @r=(q$Revision: 1.6 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
4	wakaba	1.1	require Message::URI::URIReference;
5
6	wakaba	1.7	sub parse_byte_string ($$$$;$$) {
7	wakaba	1.1	require Encode;
8			my $s = Encode::decode ('utf-8', $_[1]);
9			return $_[0]->_parse (\$s, $_[2], $_[3], $_[4] \|\| sub {
10			my %err = @_;
11			warn $err{type}, "\n";
12	wakaba	1.7	}, $_[5]);
13	wakaba	1.1	} # parse_byte_string
14
15	wakaba	1.7	sub parse_char_string ($$$$;$$) {
16	wakaba	1.1	return $_[0]->_parse (\($_[1]), $_[2], $_[3], $_[4] \|\| sub {
17			my %err = @_;
18			warn $err{type}, "\n";
19	wakaba	1.7	}, $_[5]);
20	wakaba	1.1	} # parse_char_string
21
22	wakaba	1.7	my $default_error_levels = {
23			must => 'm',
24			info => 'i',
25			};
26
27			sub _parse ($$$$$$) {
28			#my (undef, $input, $manifest_uri, $base_uri, $onerror, $levels) = @_;
29	wakaba	1.1
30			## NOTE: A manifest MUST be labeled as text/cache-manifest. (This should
31			## be checked in upper-level).
32			## NOTE: No "MUST" for being UTF-8.
33			## NOTE: A \|text/cache-manifest\| MUST be a cache manifest.
34			## NOTE: Newlines MUST be CR/CRLF/LF. (We don't and can't check this.)
35
36	wakaba	1.2	## ISSUE: In RFC 2046: "The specification for any future subtypes of "text" must specify whether or not they will also utilize a "charset" parameter"
37
38	wakaba	1.1	my $m_uri = Message::DOM::DOMImplementation->create_uri_reference ($_[2]);
39			my $m_scheme = $m_uri->uri_scheme;
40
41			my $onerror = $_[4];
42	wakaba	1.7	my $levels = $_[5] \|\| $default_error_levels;
43
44	wakaba	1.1	my $line_number = 1;
45
46	wakaba	1.4	## Same origin with the manifest's URI
47			my $same_origin = sub {
48			## NOTE: Step numbers in this function corresponds to those in the
49			## algorithm for determining the origin of a URI specified in HTML5.
50	wakaba	1.1
51	wakaba	1.4	## 1. and 2.
52	wakaba	1.1	my $u1 = shift;
53	wakaba	1.4	#my $m_uri = $m_uri;
54
55	wakaba	1.7
56	wakaba	1.4	## 3.
57			return 0 unless defined $u1->uri_authority;
58			return 0 unless defined $m_uri->uri_authority;
59			## TODO: In addition, in the case of URIs with non-server-based authority
60			## it must also return 0.
61	wakaba	1.1
62	wakaba	1.4	## 4.
63	wakaba	1.3	unless (lc $u1->uri_scheme eq lc $m_scheme) { ## TODO: case
64	wakaba	1.1	return 0;
65			}
66	wakaba	1.4	## TODO: Return if $u1->uri_scheme is not a supported scheme.
67			## NOTE: $m_scheme is always a supported URI scheme, otherwise
68			## the manifest itself cannot be retrieved.
69	wakaba	1.1
70	wakaba	1.4	## 5., 6., and 7.
71	wakaba	1.1	return 0 unless $u1->uri_host eq $m_uri->uri_host;
72	wakaba	1.4	## TODO: IDNA ToASCII
73
74			## 8.
75	wakaba	1.1	return 0 unless $u1->uri_port eq $m_uri->uri_port;
76	wakaba	1.4	## TODO: default port
77	wakaba	1.1
78	wakaba	1.4	## 9.
79	wakaba	1.1	return 1;
80	wakaba	1.4	}; # $same_origin
81	wakaba	1.1
82			## Step 5
83			my $input = $_[1];
84
85			## Step 1: MUST bytes --UTF-8--> characters.
86	wakaba	1.5	## NOTE: illegal(s) -> U+FFFD, #U+0000 -> U+FFFD (commented out in r1553).
87			#$$input =~ tr/\x00/\x{FFFD}/;
88	wakaba	1.1
89			## Step 2
90			my $explicit_uris = [];
91
92			## Step 3
93			my $fallback_uris = {};
94
95			## Step 4
96			my $online_whitelist_uris = [];
97
98			## Step 6
99			pos ($$input) = 0;
100
101			## Step 7
102			## Skip BOM ## NOTE: MAY in syntax.
103
104			## Step 8-10
105			unless ($$input =~ /^CACHE MANIFEST[\x20\x09]*(?![^\x0D\x0A])/gc) {
106	wakaba	1.7	$onerror->(type => 'not manifest', level => $levels->{must},
107	wakaba	1.1	line => $line_number, column => 1); ## NOTE: MUST in syntax.
108			return; ## Not a manifest.
109			}
110
111			## Step 11
112			## This is a cache manifest.
113
114			## Step 12
115			my $mode = 'explicit';
116
117			## NOTE: MUST be (blank line\|comment\|section head\|data for the current
118			## section)*.
119
120			## Step 13
121			START_OF_LINE: while (pos $$input < length $$input) {
122			$$input =~ /([\x0A\x0D\x20\x09]+)/gc;
123			my $v = $1;
124	wakaba	1.4	$line_number++ for $v =~ /\x0D\x0A?\|\x0A/g;
125	wakaba	1.1
126			## Step 14
127			$$input =~ /([^\x0A\x0D]*)/gc;
128			my $line = $1;
129
130			## Step 15
131	wakaba	1.3	$line =~ s/[\x20\x09]+\z//;
132	wakaba	1.1
133	wakaba	1.3	## Step 16-17
134			if ($line eq '' or $line =~ /^#/) {
135			next START_OF_LINE;
136			}
137	wakaba	1.1
138			if ($line eq 'CACHE:') {
139	wakaba	1.3	## Step 18
140	wakaba	1.1	$mode = 'explicit';
141			next START_OF_LINE;
142			} elsif ($line eq 'FALLBACK:') {
143	wakaba	1.3	## Step 19
144	wakaba	1.1	$mode = 'fallback';
145			next START_OF_LINE;
146			} elsif ($line eq 'NETWORK:') {
147	wakaba	1.3	## Step 20
148	wakaba	1.1	$mode = 'online whitelist';
149			next START_OF_LINE;
150			}
151
152			## NOTE: "URIs that are to be fallback pages associated with
153			## opportunistic caching namespaces, and those namespaces themselves,
154			## MUST be given in fallback sections, with the namespace being the
155			## first URI of the data line, and the corresponding fallback page
156			## being the second URI. All the other pages to be cached MUST be
157			## listed in explicit sections." in writing section can't be tested.
158			## NOTE: "URIs that the user agent is to put into the online whitelist
159			## MUST all be specified in online whitelist sections." in writing
160			## section can't be tested.
161
162			## NOTE: "Relative URIs MUST be given relative to the manifest's own URI."
163			## requirement in writing section can't be tested.
164
165	wakaba	1.3	## Step 21
166	wakaba	1.1	if ($mode eq 'explicit') {
167			my $uri = Message::DOM::DOMImplementation->create_uri_reference ($line);
168
169			unless ($uri->is_iri_reference_3987) {
170	wakaba	1.7	$onerror->(type => 'syntax error:iriref3987',
171			level => $levels->{must},
172			line => $line_number, column => 1,
173	wakaba	1.1	value => $line);
174			next START_OF_LINE; ## NOTE: MUST in syntax.
175			}
176
177			$uri = $uri->get_absolute_reference ($_[3]);
178
179			if (defined $uri->uri_fragment) {
180			$uri->uri_fragment (undef);
181	wakaba	1.7	$onerror->(type => 'URL fragment not allowed',
182			level => $levels->{must},
183			line => $line_number, column => 1,
184	wakaba	1.1	value => $line);
185			## NOTE: MUST in writing section.
186			}
187
188			my $scheme = $uri->uri_scheme;
189			unless (defined $scheme and $scheme eq $m_scheme) {
190			$onerror->(type => 'different scheme from manifest',
191	wakaba	1.7	level => $levels->{info},
192			line => $line_number, column => 1,
193	wakaba	1.1	value => $uri->uri_reference);
194			next START_OF_LINE;
195			}
196
197			push @$explicit_uris, $uri->uri_reference;
198			} elsif ($mode eq 'fallback') {
199			my ($p1, $p2) = split /[\x20\x09]+/, $line, 2;
200
201			unless (defined $p2) {
202	wakaba	1.7	$onerror->(type => 'no fallback entry URL',
203			level => $levels->{must},
204			line => $line_number, column => 1,
205	wakaba	1.1	value => $line);
206			next START_OF_LINE; ## NOTE: MUST in syntax.
207			}
208
209			my $u1 = Message::DOM::DOMImplementation->create_uri_reference ($p1);
210
211			unless ($u1->is_iri_reference_3987) {
212	wakaba	1.7	$onerror->(type => 'syntax error:iriref3987',
213			level => $levels->{must},
214			line => $line_number, column => 1,
215	wakaba	1.1	index => 0, value => $p1);
216			next START_OF_LINE; ## NOTE: MUST in syntax.
217			}
218
219			my $u2 = Message::DOM::DOMImplementation->create_uri_reference ($p2);
220
221			unless ($u2->is_iri_reference_3987) {
222	wakaba	1.7	$onerror->(type => 'syntax error:iriref3987',
223			level => $levels->{must},
224			line => $line_number, column => 1,
225	wakaba	1.1	index => 1, value => $p2);
226			next START_OF_LINE; ## NOTE: MUST in syntax.
227			}
228
229			if (defined $u1->uri_fragment) {
230	wakaba	1.6	$u1->uri_fragment (undef);
231	wakaba	1.7	$onerror->(type => 'URL fragment not allowed',
232			level => $levels->{must},
233			line => $line_number, column => 1,
234	wakaba	1.1	index => 0, value => $p1);
235			## NOTE: MUST in writing section.
236			}
237
238			if (defined $u2->uri_fragment) {
239	wakaba	1.6	$u2->uri_fragment (undef);
240	wakaba	1.7	$onerror->(type => 'URL fragment not allowed',
241			level => $levels->{must},
242			line => $line_number, column => 1,
243	wakaba	1.1	index => 1, value => $p2);
244			## NOTE: MUST in writing section.
245			}
246
247			$u1 = $u1->get_absolute_reference ($_[3]);
248			$u2 = $u2->get_absolute_reference ($_[3]);
249
250			if (exists $fallback_uris->{$u1->uri_reference}) {
251			$onerror->(type => 'duplicate oc namespace',
252	wakaba	1.7	level => $levels->{must},
253			line => $line_number, column => 1,
254	wakaba	1.1	index => 0, value => $u1->uri_reference);
255			next START_OF_LINE; ## NOTE: MUST in syntax.
256			}
257
258	wakaba	1.4	unless ($same_origin->($u1)) {
259	wakaba	1.7	$onerror->(type => 'different origin from manifest',
260			level => $levels->{must},
261			line => $line_number, column => 1,
262	wakaba	1.1	index => 0, value => $u1->uri_reference);
263			next START_OF_LINE; ## NOTE: MUST in syntax.
264			}
265
266			my $u2_scheme = $u2->uri_scheme;
267			unless (defined $u2_scheme and $u2_scheme eq $m_scheme) {
268			$onerror->(type => 'different scheme from manifest',
269	wakaba	1.7	level => $levels->{info},
270			line => $line_number, column => 1,
271	wakaba	1.1	index => 1, value => $u2->uri_reference);
272			next START_OF_LINE;
273			}
274
275			$fallback_uris->{$u1->uri_reference} = $u2->uri_reference;
276			} elsif ($mode eq 'online whitelist') {
277			my $uri = Message::DOM::DOMImplementation->create_uri_reference ($line);
278
279			unless ($uri->is_iri_reference_3987) {
280	wakaba	1.7	$onerror->(type => 'syntax error:iriref3987',
281			level => $levels->{must},
282			line => $line_number, column => 1,
283	wakaba	1.1	value => $line);
284			next START_OF_LINE; ## NOTE: MUST in syntax.
285			}
286
287			$uri = $uri->get_absolute_reference ($_[3]);
288
289			if (defined $uri->uri_fragment) {
290			$uri->uri_fragment (undef);
291	wakaba	1.7	$onerror->(type => 'URL fragment not allowed',
292			level => $levels->{must},
293			line => $line_number, column => 1,
294	wakaba	1.1	value => $line);
295			## NOTE: MUST in writing section.
296			}
297
298			my $scheme = $uri->uri_scheme;
299			unless (defined $scheme and $scheme eq $m_scheme) {
300			$onerror->(type => 'different scheme from manifest',
301	wakaba	1.7	level => $levels->{info},
302			line => $line_number, column => 1,
303	wakaba	1.1	value => $uri->uri_reference);
304			next START_OF_LINE;
305			}
306
307			push @$online_whitelist_uris, $uri->uri_reference;
308			}
309
310	wakaba	1.3	## Step 22
311	wakaba	1.1	#next START_OF_LINE;
312			} # START_OF_LINE
313
314	wakaba	1.3	## Step 23
315			return [$explicit_uris, $fallback_uris, $online_whitelist_uris,
316			$m_uri->uri_reference];
317	wakaba	1.1	} # _parse
318
319	wakaba	1.7	sub check_manifest ($$$;$) {
320			my (undef, $manifest, $onerror, $levels) = @_;
321	wakaba	1.1
322			my $listed = {};
323	wakaba	1.7
324			$levels \|\|= $default_error_levels;
325	wakaba	1.1
326			require Whatpm::URIChecker;
327
328	wakaba	1.3	my $i = 0;
329	wakaba	1.1	for my $uri (@{$manifest->[0]}) {
330			$listed->{$uri} = 1;
331
332			Whatpm::URIChecker->check_iri_reference ($uri, sub {
333	wakaba	1.7	$onerror->(value => $uri, @_, index => $i);
334	wakaba	1.1	});
335	wakaba	1.3
336			## ISSUE: Literal equivalence, right?
337			if ($uri eq $manifest->[3]) {
338	wakaba	1.7	$onerror->(level => $levels->{must}, value => $uri,
339	wakaba	1.3	index => $i,
340	wakaba	1.7	type => 'same as manifest URL');
341	wakaba	1.3	}
342
343			$i++;
344	wakaba	1.1	}
345
346	wakaba	1.3	for my $uri1 (sort {$a cmp $b} keys %{$manifest->[1]}) {
347			Whatpm::URIChecker->check_iri_reference ($uri1, sub {
348	wakaba	1.7	$onerror->(value => $uri1, @_, index => 0);
349	wakaba	1.1	});
350
351	wakaba	1.3	if ($uri1 eq $manifest->[3]) {
352	wakaba	1.7	$onerror->(level => $levels->{must}, value => $uri1,
353	wakaba	1.3	index => $i,
354	wakaba	1.7	type => 'same as manifest URL');
355	wakaba	1.3	}
356
357			$i++;
358
359			my $uri2 = $manifest->[1]->{$uri1};
360			$listed->{$uri2} = 1;
361
362			Whatpm::URIChecker->check_iri_reference ($uri2, sub {
363	wakaba	1.7	$onerror->(value => $uri2, @_, index => 1);
364	wakaba	1.1	});
365	wakaba	1.3
366			if ($uri2 eq $manifest->[3]) {
367	wakaba	1.7	$onerror->(level => $levels->{must}, value => $uri2,
368	wakaba	1.3	index => $i,
369	wakaba	1.7	type => 'same as manifest URL');
370	wakaba	1.3	}
371
372			$i++;
373	wakaba	1.1	}
374
375			for my $uri (@{$manifest->[2]}) {
376			if ($listed->{$uri}) {
377			$onerror->(type => 'both in entries and whitelist',
378	wakaba	1.3	index => $i,
379	wakaba	1.7	level => $levels->{must}, value => $uri);
380	wakaba	1.1	## NOTE: MUST in writing section.
381			}
382
383			Whatpm::URIChecker->check_iri_reference ($uri, sub {
384	wakaba	1.7	$onerror->(value => $uri, @_, index => $i);
385	wakaba	1.1	});
386	wakaba	1.3
387			if ($uri eq $manifest->[3]) {
388	wakaba	1.7	$onerror->(level => $levels->{must}, value => $uri,
389	wakaba	1.3	index => $i,
390	wakaba	1.7	type => 'same as manifest URL');
391	wakaba	1.3	}
392
393			$i++;
394	wakaba	1.1	}
395			} # check_manifest
396
397
398			=head1 LICENSE
399
400	wakaba	1.3	Copyright 2007-2008 Wakaba <[email protected]>
401	wakaba	1.1
402			This library is free software; you can redistribute it
403			and/or modify it under the same terms as Perl itself.
404
405			=cut
406
407			1;
408	wakaba	1.7	# $Date: 2008/05/16 13:56:16 $