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b2e1304d |
1 | package HTTP::Request::AsCGI; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base 'Class::Accessor::Fast'; |
6 | |
7 | use Carp; |
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8 | use IO::File; |
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9 | |
10 | __PACKAGE__->mk_accessors( qw[ enviroment request stdin stdout stderr ] ); |
11 | |
12 | our $VERSION = 0.1; |
13 | |
14 | sub new { |
15 | my $class = shift; |
16 | my $request = shift; |
17 | |
18 | my $self = { |
19 | request => $request, |
20 | restored => 0, |
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21 | setuped => 0, |
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22 | stdin => IO::File->new_tmpfile, |
23 | stdout => IO::File->new_tmpfile, |
24 | stderr => IO::File->new_tmpfile |
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25 | }; |
26 | |
27 | $self->{enviroment} = { |
28 | GATEWAY_INTERFACE => 'CGI/1.1', |
29 | HTTP_HOST => $request->uri->host_port, |
30 | QUERY_STRING => $request->uri->query || '', |
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31 | SCRIPT_NAME => '/', |
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32 | SERVER_NAME => $request->uri->host, |
33 | SERVER_PORT => $request->uri->port, |
34 | SERVER_PROTOCOL => $request->protocol || 'HTTP/1.1', |
35 | SERVER_SOFTWARE => __PACKAGE__ . "/" . $VERSION, |
36 | REMOTE_ADDR => '127.0.0.1', |
37 | REMOTE_HOST => 'localhost', |
38 | REMOTE_PORT => int( rand(64000) + 1000 ), # not in RFC 3875 |
39 | REQUEST_URI => $request->uri->path || '/', # not in RFC 3875 |
40 | REQUEST_METHOD => $request->method, |
41 | @_ |
42 | }; |
43 | |
44 | foreach my $field ( $request->headers->header_field_names ) { |
45 | |
46 | my $key = uc($field); |
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47 | $key =~ tr/-/_/; |
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48 | $key = 'HTTP_' . $key unless $field =~ /^Content-(Length|Type)$/; |
49 | |
50 | unless ( exists $self->{enviroment}->{$key} ) { |
51 | $self->{enviroment}->{$key} = $request->headers->header($field); |
52 | } |
53 | } |
54 | |
55 | return $class->SUPER::new($self); |
56 | } |
57 | |
58 | sub setup { |
59 | my $self = shift; |
60 | |
61 | open( my $stdin, '>&', STDIN->fileno ) |
62 | or croak("Can't dup stdin: $!"); |
63 | |
64 | open( my $stdout, '>&', STDOUT->fileno ) |
65 | or croak("Can't dup stdout: $!"); |
66 | |
67 | open( my $stderr, '>&', STDERR->fileno ) |
68 | or croak("Can't dup stderr: $!"); |
69 | |
70 | $self->{restore} = { |
71 | stdin => $stdin, |
72 | stdout => $stdout, |
73 | stderr => $stderr, |
74 | enviroment => {%ENV} |
75 | }; |
76 | |
77 | if ( $self->request->content_length ) { |
78 | |
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79 | $self->stdin->syswrite( $self->request->content ) |
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80 | or croak("Can't write request content to stdin handle: $!"); |
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81 | |
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82 | $self->stdin->sysseek( 0, SEEK_SET ) |
780060e5 |
83 | or croak("Can't seek stdin handle: $!"); |
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84 | } |
85 | |
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86 | { |
87 | no warnings 'uninitialized'; |
88 | %ENV = %{ $self->enviroment }; |
89 | } |
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90 | |
91 | open( STDIN, '<&=', $self->stdin->fileno ) |
92 | or croak("Can't open stdin: $!"); |
93 | |
94 | open( STDOUT, '>&=', $self->stdout->fileno ) |
95 | or croak("Can't open stdout: $!"); |
96 | |
97 | open( STDERR, '>&=', $self->stderr->fileno ) |
98 | or croak("Can't open stderr: $!"); |
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99 | |
100 | $self->{setuped}++; |
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101 | |
102 | return $self; |
103 | } |
104 | |
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105 | sub response { |
106 | my ( $self, $callback ) = @_; |
107 | |
108 | return undef unless $self->{setuped}; |
109 | return undef unless $self->{restored}; |
110 | |
111 | require HTTP::Response; |
112 | |
113 | my $message = undef; |
114 | my $position = $self->stdin->tell; |
115 | |
116 | $self->stdin->sysseek( 0, SEEK_SET ) |
117 | or croak("Can't seek stdin handle: $!"); |
118 | |
119 | while ( my $line = $self->stdout->getline ) { |
120 | $message .= $line; |
121 | last if $line =~ /^\x0d?\x0a$/; |
122 | } |
123 | |
124 | unless ( $message =~ /^HTTP/ ) { |
125 | $message = "HTTP/1.1 200\x0d\x0a" . $message; |
126 | } |
127 | |
128 | my $response = HTTP::Response->parse($message); |
129 | |
130 | if ( my $code = $response->header('Status') ) { |
131 | $response->code($code); |
132 | } |
133 | |
134 | $response->protocol( $self->request->protocol ); |
135 | $response->headers->date( time() ); |
136 | |
137 | if ( $callback ) { |
138 | $response->content( sub { |
139 | if ( $self->stdout->read( my $buffer, 4096 ) ) { |
140 | return $buffer; |
141 | } |
142 | return undef; |
143 | }); |
144 | } |
145 | else { |
146 | my $length = 0; |
147 | while ( $self->stdout->read( my $buffer, 4096 ) ) { |
148 | $length += length($buffer); |
149 | $response->add_content($buffer); |
150 | } |
151 | $response->content_length($length) unless $response->content_length; |
152 | } |
153 | |
154 | $self->stdin->sysseek( $position, SEEK_SET ) |
155 | or croak("Can't seek stdin handle: $!"); |
156 | |
157 | return $response; |
158 | } |
159 | |
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160 | sub restore { |
161 | my $self = shift; |
162 | |
163 | %ENV = %{ $self->{restore}->{enviroment} }; |
164 | |
165 | open( STDIN, '>&', $self->{restore}->{stdin} ) |
166 | or croak("Can't restore stdin: $!"); |
167 | |
168 | open( STDOUT, '>&', $self->{restore}->{stdout} ) |
169 | or croak("Can't restore stdout: $!"); |
170 | |
171 | open( STDERR, '>&', $self->{restore}->{stderr} ) |
172 | or croak("Can't restore stderr: $!"); |
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173 | |
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174 | $self->stdin->sysseek( 0, SEEK_SET ) |
175 | or croak("Can't seek stdin: $!"); |
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176 | |
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177 | if ( $self->stdout->fileno != STDOUT->fileno ) { |
178 | $self->stdout->sysseek( 0, SEEK_SET ) |
179 | or croak("Can't seek stdout: $!"); |
180 | } |
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181 | |
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182 | if ( $self->stderr->fileno != STDERR->fileno ) { |
183 | $self->stderr->sysseek( 0, SEEK_SET ) |
184 | or croak("Can't seek stderr: $!"); |
185 | } |
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186 | |
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187 | $self->{restored}++; |
188 | } |
189 | |
190 | sub DESTROY { |
191 | my $self = shift; |
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192 | $self->restore if $self->{setuped} && !$self->{restored}; |
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193 | } |
194 | |
195 | 1; |
196 | |
197 | __END__ |
198 | |
199 | =head1 NAME |
200 | |
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201 | HTTP::Request::AsCGI - Setup a CGI enviroment from a HTTP::Request |
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202 | |
203 | =head1 SYNOPSIS |
204 | |
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205 | use CGI; |
206 | use HTTP::Request; |
207 | use HTTP::Request::AsCGI; |
208 | |
209 | my $request = HTTP::Request->new( GET => 'http://www.host.com/' ); |
210 | my $stdout; |
211 | |
212 | { |
213 | my $c = HTTP::Request::AsCGI->new($request)->setup; |
214 | my $q = CGI->new; |
215 | |
216 | print $q->header, |
217 | $q->start_html('Hello World'), |
218 | $q->h1('Hello World'), |
219 | $q->end_html; |
220 | |
221 | $stdout = $c->stdout; |
222 | |
223 | # enviroment and descriptors will automatically be restored when $c is destructed. |
224 | } |
225 | |
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226 | while ( my $line = $stdout->getline ) { |
227 | print $line; |
228 | } |
229 | |
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230 | =head1 DESCRIPTION |
231 | |
232 | =head1 METHODS |
233 | |
234 | =over 4 |
235 | |
236 | =item new |
237 | |
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238 | =item enviroment |
239 | |
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240 | =item setup |
241 | |
242 | =item restore |
243 | |
244 | =item request |
245 | |
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246 | =item response |
247 | |
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248 | =item stdin |
249 | |
250 | =item stdout |
251 | |
252 | =item stderr |
253 | |
254 | =back |
255 | |
256 | =head1 BUGS |
257 | |
258 | =head1 AUTHOR |
259 | |
260 | Christian Hansen, C<ch@ngmedia.com> |
261 | |
262 | =head1 LICENSE |
263 | |
264 | This library is free software. You can redistribute it and/or modify |
265 | it under the same terms as perl itself. |
266 | |
267 | =cut |