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1 | package Web::Dispatch::ParamParser; |
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2 | |
3 | use strict; |
4 | use warnings FATAL => 'all'; |
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5 | use Encode 2.21 (); |
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6 | |
7 | sub UNPACKED_QUERY () { __PACKAGE__.'.unpacked_query' } |
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8 | sub UNPACKED_BODY () { __PACKAGE__.'.unpacked_body' } |
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9 | sub UNPACKED_BODY_OBJECT () { __PACKAGE__.'.unpacked_body_object' } |
10 | sub UNPACKED_UPLOADS () { __PACKAGE__.'.unpacked_uploads' } |
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11 | sub PARAM_ENCODING () { __PACKAGE__.'.param_encoding' } |
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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 | _decode_params(_unpack_params($_[0]->{QUERY_STRING}), $_[0]) |
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17 | }; |
18 | } |
19 | |
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20 | sub get_unpacked_body_from { |
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21 | return ($_[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, $_[0]->{CONTENT_LENGTH}); |
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27 | _decode_params(_unpack_params($buf), $_[0]); |
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28 | } elsif (index($ct, 'multipart/form-data') >= 0) { |
29 | my $p = get_unpacked_body_object_from($_[0])->param; |
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30 | # forcible arrayification (functional, $p does not belong to us, |
31 | # do NOT replace this with a side-effect ridden "simpler" version) |
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32 | my $array_params = { |
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33 | map +(ref($p->{$_}) eq 'ARRAY' |
34 | ? ($_ => $p->{$_}) |
35 | : ($_ => [ $p->{$_} ]) |
36 | ), keys %$p |
37 | }; |
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38 | _decode_params($array_params, $_[0]); |
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39 | } else { |
40 | {} |
41 | } |
42 | }; |
43 | } |
44 | |
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45 | sub get_unpacked_body_object_from { |
46 | # we may have no object at all - so use a single element arrayref for ||= |
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47 | return (($_[0]->{+ORIG_ENV}||$_[0])->{+UNPACKED_BODY_OBJECT} ||= do { |
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48 | if (!$_[0]->{CONTENT_LENGTH}) { |
49 | [ undef ] |
50 | } elsif (index(lc($_[0]->{CONTENT_TYPE}||''),'multipart/form-data')==-1) { |
51 | [ undef ] |
52 | } else { |
53 | [ _make_http_body($_[0]) ] |
54 | } |
55 | })->[0]; |
56 | } |
57 | |
58 | sub get_unpacked_uploads_from { |
59 | $_[0]->{+UNPACKED_UPLOADS} ||= do { |
60 | require Web::Dispatch::Upload; require HTTP::Headers; |
61 | my ($final, $reason) = ( |
62 | {}, "field %s exists with value %s but body was not multipart/form-data" |
63 | ); |
64 | if (my $body = get_unpacked_body_object_from($_[0])) { |
65 | my $u = $body->upload; |
66 | $reason = "field %s exists with value %s but was not an upload"; |
67 | foreach my $k (keys %$u) { |
68 | foreach my $v (ref($u->{$k}) eq 'ARRAY' ? @{$u->{$k}} : $u->{$k}) { |
69 | push(@{$final->{$k}||=[]}, Web::Dispatch::Upload->new( |
70 | %{$v}, |
71 | headers => HTTP::Headers->new($v->{headers}) |
72 | )); |
73 | } |
74 | } |
75 | } |
76 | my $b = get_unpacked_body_from($_[0]); |
77 | foreach my $k (keys %$b) { |
78 | next if $final->{$k}; |
79 | foreach my $v (@{$b->{$k}}) { |
80 | next unless $v; |
81 | push(@{$final->{$k}||=[]}, Web::Dispatch::NotAnUpload->new( |
82 | filename => $v, |
83 | reason => sprintf($reason, $k, $v) |
84 | )); |
85 | } |
86 | } |
87 | $final; |
88 | }; |
89 | } |
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90 | |
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91 | sub _decode_params { |
92 | my ($params, $env) = @_; |
93 | return $params if !(my $enc_name = $env->{+PARAM_ENCODING}); |
94 | |
95 | my $encoding = Encode::find_encoding($enc_name) |
96 | or die "Unknown encoding '$enc_name'"; |
97 | my $CHECK = Encode::FB_CROAK | Encode::LEAVE_SRC; |
98 | |
99 | my %p = map { |
100 | $encoding->decode($_, $CHECK) => [ |
101 | map { $encoding->decode($_, $CHECK) } @{$params->{$_}} |
102 | ] |
103 | } keys %$params; |
104 | return \%p; |
105 | } |
106 | |
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107 | { |
108 | # shamelessly stolen from HTTP::Body::UrlEncoded by Christian Hansen |
109 | |
110 | my $DECODE = qr/%([0-9a-fA-F]{2})/; |
111 | |
112 | my %hex_chr; |
113 | |
114 | foreach my $num ( 0 .. 255 ) { |
115 | my $h = sprintf "%02X", $num; |
116 | $hex_chr{ lc $h } = $hex_chr{ uc $h } = chr $num; |
117 | } |
118 | |
119 | sub _unpack_params { |
120 | my %unpack; |
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121 | (my $params = $_[0]) =~ s/\+/ /g; |
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122 | my ($name, $value); |
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123 | foreach my $pair (split(/[&;](?:\s+)?/, $params)) { |
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124 | next unless (($name, $value) = split(/=/, $pair, 2)) == 2; |
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125 | |
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126 | s/$DECODE/$hex_chr{$1}/gs for ($name, $value); |
127 | |
128 | push(@{$unpack{$name}||=[]}, $value); |
129 | } |
130 | \%unpack; |
131 | } |
132 | } |
133 | |
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134 | { |
135 | # shamelessly stolen from Plack::Request by miyagawa |
136 | |
137 | sub _make_http_body { |
138 | |
139 | # Can't actually do this yet, since Plack::Request deletes the |
140 | # header structure out of the uploads in its copy of the body. |
141 | # I suspect I need to supply miyagawa with a failing test. |
142 | |
143 | #if (my $plack_body = $_[0]->{'plack.request.http.body'}) { |
144 | # # Plack already constructed one; probably wasteful to do it again |
145 | # return $plack_body; |
146 | #} |
147 | |
148 | require HTTP::Body; |
149 | my $body = HTTP::Body->new(@{$_[0]}{qw(CONTENT_TYPE CONTENT_LENGTH)}); |
150 | $body->cleanup(1); |
151 | my $spin = 0; |
152 | my $input = $_[0]->{'psgi.input'}; |
153 | my $cl = $_[0]->{CONTENT_LENGTH}; |
154 | while ($cl) { |
155 | $input->read(my $chunk, $cl < 8192 ? $cl : 8192); |
156 | my $read = length $chunk; |
157 | $cl -= $read; |
158 | $body->add($chunk); |
159 | |
160 | if ($read == 0 && $spin++ > 2000) { |
161 | require Carp; |
162 | Carp::croak("Bad Content-Length: maybe client disconnect? ($cl bytes remaining)"); |
163 | } |
164 | } |
165 | return $body; |
166 | } |
167 | } |
168 | |
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169 | 1; |