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1 | package Web::Dispatch::ParamParser; |
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2 | |
3 | use strict; |
4 | use warnings FATAL => 'all'; |
5 | |
6 | sub UNPACKED_QUERY () { __PACKAGE__.'.unpacked_query' } |
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7 | sub UNPACKED_BODY () { __PACKAGE__.'.unpacked_body' } |
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8 | sub UNPACKED_BODY_OBJECT () { __PACKAGE__.'.unpacked_body_object' } |
9 | sub UNPACKED_UPLOADS () { __PACKAGE__.'.unpacked_uploads' } |
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10 | |
11 | sub get_unpacked_query_from { |
12 | return $_[0]->{+UNPACKED_QUERY} ||= do { |
13 | _unpack_params($_[0]->{QUERY_STRING}) |
14 | }; |
15 | } |
16 | |
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17 | sub get_unpacked_body_from { |
18 | return $_[0]->{+UNPACKED_BODY} ||= do { |
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19 | my $ct = lc($_[0]->{CONTENT_TYPE}||''); |
20 | if (!$_[0]->{CONTENT_LENGTH}) { |
21 | {} |
22 | } elsif (index($ct, 'application/x-www-form-urlencoded') >= 0) { |
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23 | $_[0]->{'psgi.input'}->read(my $buf, $_[0]->{CONTENT_LENGTH}); |
24 | _unpack_params($buf); |
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25 | } elsif (index($ct, 'multipart/form-data') >= 0) { |
26 | my $p = get_unpacked_body_object_from($_[0])->param; |
27 | # forcible arrayification |
28 | +{ |
29 | map +(ref($p->{$_}) eq 'ARRAY' |
30 | ? ($_ => $p->{$_}) |
31 | : ($_ => [ $p->{$_} ]) |
32 | ), keys %$p |
33 | }; |
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34 | } else { |
35 | {} |
36 | } |
37 | }; |
38 | } |
39 | |
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40 | sub get_unpacked_body_object_from { |
41 | # we may have no object at all - so use a single element arrayref for ||= |
42 | return ($_[0]->{+UNPACKED_BODY_OBJECT} ||= do { |
43 | if (!$_[0]->{CONTENT_LENGTH}) { |
44 | [ undef ] |
45 | } elsif (index(lc($_[0]->{CONTENT_TYPE}||''),'multipart/form-data')==-1) { |
46 | [ undef ] |
47 | } else { |
48 | [ _make_http_body($_[0]) ] |
49 | } |
50 | })->[0]; |
51 | } |
52 | |
53 | sub get_unpacked_uploads_from { |
54 | $_[0]->{+UNPACKED_UPLOADS} ||= do { |
55 | require Web::Dispatch::Upload; require HTTP::Headers; |
56 | my ($final, $reason) = ( |
57 | {}, "field %s exists with value %s but body was not multipart/form-data" |
58 | ); |
59 | if (my $body = get_unpacked_body_object_from($_[0])) { |
60 | my $u = $body->upload; |
61 | $reason = "field %s exists with value %s but was not an upload"; |
62 | foreach my $k (keys %$u) { |
63 | foreach my $v (ref($u->{$k}) eq 'ARRAY' ? @{$u->{$k}} : $u->{$k}) { |
64 | push(@{$final->{$k}||=[]}, Web::Dispatch::Upload->new( |
65 | %{$v}, |
66 | headers => HTTP::Headers->new($v->{headers}) |
67 | )); |
68 | } |
69 | } |
70 | } |
71 | my $b = get_unpacked_body_from($_[0]); |
72 | foreach my $k (keys %$b) { |
73 | next if $final->{$k}; |
74 | foreach my $v (@{$b->{$k}}) { |
75 | next unless $v; |
76 | push(@{$final->{$k}||=[]}, Web::Dispatch::NotAnUpload->new( |
77 | filename => $v, |
78 | reason => sprintf($reason, $k, $v) |
79 | )); |
80 | } |
81 | } |
82 | $final; |
83 | }; |
84 | } |
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85 | |
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86 | { |
87 | # shamelessly stolen from HTTP::Body::UrlEncoded by Christian Hansen |
88 | |
89 | my $DECODE = qr/%([0-9a-fA-F]{2})/; |
90 | |
91 | my %hex_chr; |
92 | |
93 | foreach my $num ( 0 .. 255 ) { |
94 | my $h = sprintf "%02X", $num; |
95 | $hex_chr{ lc $h } = $hex_chr{ uc $h } = chr $num; |
96 | } |
97 | |
98 | sub _unpack_params { |
99 | my %unpack; |
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100 | (my $params = $_[0]) =~ s/\+/ /g; |
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101 | my ($name, $value); |
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102 | foreach my $pair (split(/[&;](?:\s+)?/, $params)) { |
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103 | next unless (($name, $value) = split(/=/, $pair, 2)) == 2; |
104 | |
105 | s/$DECODE/$hex_chr{$1}/gs for ($name, $value); |
106 | |
107 | push(@{$unpack{$name}||=[]}, $value); |
108 | } |
109 | \%unpack; |
110 | } |
111 | } |
112 | |
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113 | { |
114 | # shamelessly stolen from Plack::Request by miyagawa |
115 | |
116 | sub _make_http_body { |
117 | |
118 | # Can't actually do this yet, since Plack::Request deletes the |
119 | # header structure out of the uploads in its copy of the body. |
120 | # I suspect I need to supply miyagawa with a failing test. |
121 | |
122 | #if (my $plack_body = $_[0]->{'plack.request.http.body'}) { |
123 | # # Plack already constructed one; probably wasteful to do it again |
124 | # return $plack_body; |
125 | #} |
126 | |
127 | require HTTP::Body; |
128 | my $body = HTTP::Body->new(@{$_[0]}{qw(CONTENT_TYPE CONTENT_LENGTH)}); |
129 | $body->cleanup(1); |
130 | my $spin = 0; |
131 | my $input = $_[0]->{'psgi.input'}; |
132 | my $cl = $_[0]->{CONTENT_LENGTH}; |
133 | while ($cl) { |
134 | $input->read(my $chunk, $cl < 8192 ? $cl : 8192); |
135 | my $read = length $chunk; |
136 | $cl -= $read; |
137 | $body->add($chunk); |
138 | |
139 | if ($read == 0 && $spin++ > 2000) { |
140 | require Carp; |
141 | Carp::croak("Bad Content-Length: maybe client disconnect? ($cl bytes remaining)"); |
142 | } |
143 | } |
144 | return $body; |
145 | } |
146 | } |
147 | |
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148 | 1; |