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1 | package Web::Dispatch::ParamParser; |
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2 | |
3 | use strict; |
4 | use warnings FATAL => 'all'; |
5 | |
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6 | use Encode 'decode_utf8'; |
7 | |
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8 | sub UNPACKED_QUERY () { __PACKAGE__.'.unpacked_query' } |
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9 | sub UNPACKED_BODY () { __PACKAGE__.'.unpacked_body' } |
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10 | sub UNPACKED_BODY_OBJECT () { __PACKAGE__.'.unpacked_body_object' } |
11 | sub UNPACKED_UPLOADS () { __PACKAGE__.'.unpacked_uploads' } |
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12 | sub ORIG_ENV () { 'Web::Dispatch.original_env' } |
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13 | |
14 | sub get_unpacked_query_from { |
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15 | return ($_[0]->{+ORIG_ENV}||$_[0])->{+UNPACKED_QUERY} ||= do { |
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16 | _unpack_params($_[0]->{QUERY_STRING}) |
17 | }; |
18 | } |
19 | |
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20 | sub get_unpacked_body_from { |
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21 | return ($_[0]->{+ORIG_ENV}||$_[0])->{+UNPACKED_BODY} ||= do { |
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22 | my $ct = lc($_[0]->{CONTENT_TYPE}||''); |
23 | if (!$_[0]->{CONTENT_LENGTH}) { |
24 | {} |
25 | } elsif (index($ct, 'application/x-www-form-urlencoded') >= 0) { |
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26 | $_[0]->{'psgi.input'}->read(my $buf, $_[0]->{CONTENT_LENGTH}); |
27 | _unpack_params($buf); |
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28 | } elsif (index($ct, 'multipart/form-data') >= 0) { |
29 | my $p = get_unpacked_body_object_from($_[0])->param; |
30 | # forcible arrayification |
31 | +{ |
32 | map +(ref($p->{$_}) eq 'ARRAY' |
33 | ? ($_ => $p->{$_}) |
34 | : ($_ => [ $p->{$_} ]) |
35 | ), keys %$p |
36 | }; |
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37 | } else { |
38 | {} |
39 | } |
40 | }; |
41 | } |
42 | |
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43 | sub get_unpacked_body_object_from { |
44 | # we may have no object at all - so use a single element arrayref for ||= |
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45 | return (($_[0]->{+ORIG_ENV}||$_[0])->{+UNPACKED_BODY_OBJECT} ||= do { |
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46 | if (!$_[0]->{CONTENT_LENGTH}) { |
47 | [ undef ] |
48 | } elsif (index(lc($_[0]->{CONTENT_TYPE}||''),'multipart/form-data')==-1) { |
49 | [ undef ] |
50 | } else { |
51 | [ _make_http_body($_[0]) ] |
52 | } |
53 | })->[0]; |
54 | } |
55 | |
56 | sub get_unpacked_uploads_from { |
57 | $_[0]->{+UNPACKED_UPLOADS} ||= do { |
58 | require Web::Dispatch::Upload; require HTTP::Headers; |
59 | my ($final, $reason) = ( |
60 | {}, "field %s exists with value %s but body was not multipart/form-data" |
61 | ); |
62 | if (my $body = get_unpacked_body_object_from($_[0])) { |
63 | my $u = $body->upload; |
64 | $reason = "field %s exists with value %s but was not an upload"; |
65 | foreach my $k (keys %$u) { |
66 | foreach my $v (ref($u->{$k}) eq 'ARRAY' ? @{$u->{$k}} : $u->{$k}) { |
67 | push(@{$final->{$k}||=[]}, Web::Dispatch::Upload->new( |
68 | %{$v}, |
69 | headers => HTTP::Headers->new($v->{headers}) |
70 | )); |
71 | } |
72 | } |
73 | } |
74 | my $b = get_unpacked_body_from($_[0]); |
75 | foreach my $k (keys %$b) { |
76 | next if $final->{$k}; |
77 | foreach my $v (@{$b->{$k}}) { |
78 | next unless $v; |
79 | push(@{$final->{$k}||=[]}, Web::Dispatch::NotAnUpload->new( |
80 | filename => $v, |
81 | reason => sprintf($reason, $k, $v) |
82 | )); |
83 | } |
84 | } |
85 | $final; |
86 | }; |
87 | } |
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88 | |
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89 | { |
90 | # shamelessly stolen from HTTP::Body::UrlEncoded by Christian Hansen |
91 | |
92 | my $DECODE = qr/%([0-9a-fA-F]{2})/; |
93 | |
94 | my %hex_chr; |
95 | |
96 | foreach my $num ( 0 .. 255 ) { |
97 | my $h = sprintf "%02X", $num; |
98 | $hex_chr{ lc $h } = $hex_chr{ uc $h } = chr $num; |
99 | } |
100 | |
101 | sub _unpack_params { |
102 | my %unpack; |
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103 | (my $params = $_[0]) =~ s/\+/ /g; |
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104 | my ($name, $value); |
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105 | foreach my $pair (split(/[&;](?:\s+)?/, $params)) { |
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106 | next unless (($name, $value) = split(/=/, $pair, 2)) == 2; |
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107 | |
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108 | s/$DECODE/$hex_chr{$1}/gs for ($name, $value); |
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109 | $_ = decode_utf8 $_ for ($name, $value); |
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110 | |
111 | push(@{$unpack{$name}||=[]}, $value); |
112 | } |
113 | \%unpack; |
114 | } |
115 | } |
116 | |
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117 | { |
118 | # shamelessly stolen from Plack::Request by miyagawa |
119 | |
120 | sub _make_http_body { |
121 | |
122 | # Can't actually do this yet, since Plack::Request deletes the |
123 | # header structure out of the uploads in its copy of the body. |
124 | # I suspect I need to supply miyagawa with a failing test. |
125 | |
126 | #if (my $plack_body = $_[0]->{'plack.request.http.body'}) { |
127 | # # Plack already constructed one; probably wasteful to do it again |
128 | # return $plack_body; |
129 | #} |
130 | |
131 | require HTTP::Body; |
132 | my $body = HTTP::Body->new(@{$_[0]}{qw(CONTENT_TYPE CONTENT_LENGTH)}); |
133 | $body->cleanup(1); |
134 | my $spin = 0; |
135 | my $input = $_[0]->{'psgi.input'}; |
136 | my $cl = $_[0]->{CONTENT_LENGTH}; |
137 | while ($cl) { |
138 | $input->read(my $chunk, $cl < 8192 ? $cl : 8192); |
139 | my $read = length $chunk; |
140 | $cl -= $read; |
141 | $body->add($chunk); |
142 | |
143 | if ($read == 0 && $spin++ > 2000) { |
144 | require Carp; |
145 | Carp::croak("Bad Content-Length: maybe client disconnect? ($cl bytes remaining)"); |
146 | } |
147 | } |
148 | return $body; |
149 | } |
150 | } |
151 | |
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152 | 1; |