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1 | package HTTP::Request::AsCGI; |
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2 | # ABSTRACT: Set up a CGI environment from an HTTP::Request |
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3 | use strict; |
4 | use warnings; |
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5 | use bytes; |
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6 | use base 'Class::Accessor::Fast'; |
7 | |
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8 | use Carp; |
9 | use HTTP::Response; |
10 | use IO::Handle; |
11 | use IO::File; |
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12 | |
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13 | __PACKAGE__->mk_accessors(qw[ enviroment request stdin stdout stderr ]); |
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14 | |
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15 | sub new { |
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16 | my $class = shift; |
17 | my $request = shift; |
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18 | |
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19 | unless ( @_ % 2 == 0 && eval { $request->isa('HTTP::Request') } ) { |
20 | croak(qq/usage: $class->new( \$request [, key => value] )/); |
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21 | } |
22 | |
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23 | my $self = $class->SUPER::new( { restored => 0, setuped => 0 } ); |
24 | $self->request($request); |
25 | $self->stdin( IO::File->new_tmpfile ); |
26 | $self->stdout( IO::File->new_tmpfile ); |
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27 | |
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28 | my $host = $request->header('Host'); |
29 | my $uri = $request->uri->clone; |
30 | $uri->scheme('http') unless $uri->scheme; |
31 | $uri->host('localhost') unless $uri->host; |
32 | $uri->port(80) unless $uri->port; |
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33 | $uri->host_port($host) unless !$host || ( $host eq $uri->host_port ); |
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34 | |
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35 | $uri = $uri->canonical; |
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36 | |
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37 | my $enviroment = { |
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38 | GATEWAY_INTERFACE => 'CGI/1.1', |
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39 | HTTP_HOST => $uri->host_port, |
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40 | HTTPS => ( $uri->scheme eq 'https' ) ? 'ON' : 'OFF', # not in RFC 3875 |
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41 | PATH_INFO => $uri->path, |
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42 | QUERY_STRING => $uri->query || '', |
43 | SCRIPT_NAME => '/', |
44 | SERVER_NAME => $uri->host, |
45 | SERVER_PORT => $uri->port, |
46 | SERVER_PROTOCOL => $request->protocol || 'HTTP/1.1', |
47 | SERVER_SOFTWARE => "HTTP-Request-AsCGI/$VERSION", |
48 | REMOTE_ADDR => '127.0.0.1', |
49 | REMOTE_HOST => 'localhost', |
50 | REMOTE_PORT => int( rand(64000) + 1000 ), # not in RFC 3875 |
51 | REQUEST_URI => $uri->path_query, # not in RFC 3875 |
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52 | REQUEST_METHOD => $request->method, |
53 | @_ |
54 | }; |
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55 | |
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56 | foreach my $field ( $request->headers->header_field_names ) { |
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57 | |
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58 | my $key = uc("HTTP_$field"); |
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59 | $key =~ tr/-/_/; |
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60 | $key =~ s/^HTTP_// if $field =~ /^Content-(Length|Type)$/; |
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61 | |
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62 | unless ( exists $enviroment->{$key} ) { |
63 | $enviroment->{$key} = $request->headers->header($field); |
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64 | } |
65 | } |
66 | |
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67 | unless ( $enviroment->{SCRIPT_NAME} eq '/' && $enviroment->{PATH_INFO} ) { |
68 | $enviroment->{PATH_INFO} =~ s/^\Q$enviroment->{SCRIPT_NAME}\E/\//; |
69 | $enviroment->{PATH_INFO} =~ s/^\/+/\//; |
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70 | } |
71 | |
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72 | $self->enviroment($enviroment); |
73 | |
74 | return $self; |
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75 | } |
76 | |
77 | sub setup { |
78 | my $self = shift; |
79 | |
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80 | $self->{restore}->{enviroment} = {%ENV}; |
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81 | |
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82 | binmode( $self->stdin ); |
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83 | |
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84 | if ( $self->request->content_length ) { |
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85 | |
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86 | $self->stdin->print($self->request->content) |
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87 | or croak("Can't write request content to stdin handle: $!"); |
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88 | |
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89 | $self->stdin->seek(0, SEEK_SET) |
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90 | or croak("Can't seek stdin handle: $!"); |
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91 | |
92 | $self->stdin->flush |
93 | or croak("Can't flush stdin handle: $!"); |
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94 | } |
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95 | |
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96 | open( $self->{restore}->{stdin}, '<&'. STDIN->fileno ) |
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97 | or croak("Can't dup stdin: $!"); |
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98 | |
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99 | open( STDIN, '<&='. $self->stdin->fileno ) |
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100 | or croak("Can't open stdin: $!"); |
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101 | |
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102 | binmode( STDIN ); |
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103 | |
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104 | if ( $self->stdout ) { |
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105 | |
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106 | open( $self->{restore}->{stdout}, '>&'. STDOUT->fileno ) |
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107 | or croak("Can't dup stdout: $!"); |
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108 | |
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109 | open( STDOUT, '>&='. $self->stdout->fileno ) |
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110 | or croak("Can't open stdout: $!"); |
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111 | |
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112 | binmode( $self->stdout ); |
113 | binmode( STDOUT); |
114 | } |
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115 | |
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116 | if ( $self->stderr ) { |
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117 | |
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118 | open( $self->{restore}->{stderr}, '>&'. STDERR->fileno ) |
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119 | or croak("Can't dup stderr: $!"); |
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120 | |
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121 | open( STDERR, '>&='. $self->stderr->fileno ) |
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122 | or croak("Can't open stderr: $!"); |
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123 | |
124 | binmode( $self->stderr ); |
125 | binmode( STDERR ); |
126 | } |
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127 | |
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128 | { |
129 | no warnings 'uninitialized'; |
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130 | %ENV = %{ $self->enviroment }; |
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131 | } |
132 | |
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133 | if ( $INC{'CGI.pm'} ) { |
134 | CGI::initialize_globals(); |
135 | } |
136 | |
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137 | $self->{setuped}++; |
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138 | |
139 | return $self; |
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140 | } |
141 | |
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142 | sub response { |
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143 | my ( $self, $callback ) = @_; |
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144 | |
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145 | return undef unless $self->stdout; |
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146 | |
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147 | seek( $self->stdout, 0, SEEK_SET ) |
148 | or croak("Can't seek stdout handle: $!"); |
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149 | |
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150 | my $headers; |
151 | while ( my $line = $self->stdout->getline ) { |
152 | $headers .= $line; |
153 | last if $headers =~ /\x0d?\x0a\x0d?\x0a$/; |
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154 | } |
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155 | |
156 | unless ( defined $headers ) { |
157 | $headers = "HTTP/1.1 500 Internal Server Error\x0d\x0a"; |
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158 | } |
159 | |
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160 | unless ( $headers =~ /^HTTP/ ) { |
161 | $headers = "HTTP/1.1 200 OK\x0d\x0a" . $headers; |
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162 | } |
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163 | |
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164 | my $response = HTTP::Response->parse($headers); |
165 | $response->date( time() ) unless $response->date; |
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166 | |
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167 | my $message = $response->message; |
168 | my $status = $response->header('Status'); |
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169 | |
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170 | if ( $message && $message =~ /^(.+)\x0d$/ ) { |
171 | $response->message($1); |
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172 | } |
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173 | |
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174 | if ( $status && $status =~ /^(\d\d\d)\s?(.+)?$/ ) { |
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175 | |
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176 | my $code = $1; |
177 | my $message = $2 || HTTP::Status::status_message($code); |
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178 | |
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179 | $response->code($code); |
180 | $response->message($message); |
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181 | } |
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182 | |
183 | my $length = ( stat( $self->stdout ) )[7] - tell( $self->stdout ); |
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184 | |
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185 | if ( $response->code == 500 && !$length ) { |
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186 | |
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187 | $response->content( $response->error_as_HTML ); |
188 | $response->content_type('text/html'); |
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189 | |
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190 | return $response; |
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191 | } |
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192 | |
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193 | if ($callback) { |
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194 | |
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195 | my $handle = $self->stdout; |
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196 | |
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197 | $response->content( sub { |
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198 | |
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199 | if ( $handle->read( my $buffer, 4096 ) ) { |
200 | return $buffer; |
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201 | } |
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202 | |
203 | return undef; |
204 | }); |
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205 | } |
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206 | else { |
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207 | |
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208 | my $length = 0; |
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209 | |
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210 | while ( $self->stdout->read( my $buffer, 4096 ) ) { |
211 | $length += length($buffer); |
212 | $response->add_content($buffer); |
213 | } |
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214 | |
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215 | if ( $length && !$response->content_length ) { |
216 | $response->content_length($length); |
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217 | } |
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218 | } |
219 | |
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220 | return $response; |
221 | } |
222 | |
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223 | sub restore { |
224 | my $self = shift; |
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225 | |
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226 | { |
227 | no warnings 'uninitialized'; |
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228 | %ENV = %{ $self->{restore}->{enviroment} }; |
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229 | } |
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230 | |
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231 | open( STDIN, '<&'. fileno($self->{restore}->{stdin}) ) |
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232 | or croak("Can't restore stdin: $!"); |
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233 | |
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234 | sysseek( $self->stdin, 0, SEEK_SET ) |
235 | or croak("Can't seek stdin: $!"); |
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236 | |
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237 | if ( $self->{restore}->{stdout} ) { |
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238 | |
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239 | STDOUT->flush |
240 | or croak("Can't flush stdout: $!"); |
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241 | |
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242 | open( STDOUT, '>&'. fileno($self->{restore}->{stdout}) ) |
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243 | or croak("Can't restore stdout: $!"); |
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244 | |
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245 | sysseek( $self->stdout, 0, SEEK_SET ) |
246 | or croak("Can't seek stdout: $!"); |
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247 | } |
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248 | |
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249 | if ( $self->{restore}->{stderr} ) { |
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250 | |
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251 | STDERR->flush |
252 | or croak("Can't flush stderr: $!"); |
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253 | |
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254 | open( STDERR, '>&'. fileno($self->{restore}->{stderr}) ) |
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255 | or croak("Can't restore stderr: $!"); |
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256 | |
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257 | sysseek( $self->stderr, 0, SEEK_SET ) |
258 | or croak("Can't seek stderr: $!"); |
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259 | } |
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260 | |
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261 | $self->{restored}++; |
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262 | |
263 | return $self; |
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264 | } |
265 | |
266 | sub DESTROY { |
267 | my $self = shift; |
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268 | $self->restore if $self->{setuped} && !$self->{restored}; |
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269 | } |
270 | |
271 | 1; |
272 | |
273 | __END__ |
274 | |
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275 | =head1 SYNOPSIS |
276 | |
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277 | use CGI; |
278 | use HTTP::Request; |
279 | use HTTP::Request::AsCGI; |
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280 | |
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281 | my $request = HTTP::Request->new( GET => 'http://www.host.com/' ); |
282 | my $stdout; |
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283 | |
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284 | { |
285 | my $c = HTTP::Request::AsCGI->new($request)->setup; |
286 | my $q = CGI->new; |
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287 | |
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288 | print $q->header, |
289 | $q->start_html('Hello World'), |
290 | $q->h1('Hello World'), |
291 | $q->end_html; |
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292 | |
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293 | $stdout = $c->stdout; |
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294 | |
295 | # enviroment and descriptors will automatically be restored |
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296 | # when $c is destructed. |
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297 | } |
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298 | |
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299 | while ( my $line = $stdout->getline ) { |
300 | print $line; |
301 | } |
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302 | |
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303 | =head1 DESCRIPTION |
304 | |
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305 | Provides a convinient way of setting up an CGI enviroment from a HTTP::Request. |
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306 | |
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307 | =head1 METHODS |
308 | |
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309 | =over 4 |
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310 | |
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311 | =item new ( $request [, key => value ] ) |
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312 | |
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313 | Constructor, first argument must be a instance of HTTP::Request |
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314 | followed by optional pairs of environment key and value. |
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315 | |
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316 | =item enviroment |
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317 | |
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318 | Returns a hashref containing the environment that will be used in setup. |
319 | Changing the hashref after setup has been called will have no effect. |
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320 | |
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321 | =item setup |
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322 | |
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323 | Setups the environment and descriptors. |
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324 | |
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325 | =item restore |
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326 | |
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327 | Restores the enviroment and descriptors. Can only be called after setup. |
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328 | |
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329 | =item request |
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330 | |
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331 | Returns the request given to constructor. |
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332 | |
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333 | =item response |
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334 | |
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335 | Returns a HTTP::Response. Can only be called after restore. |
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336 | |
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337 | =item stdin |
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338 | |
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339 | Accessor for handle that will be used for STDIN, must be a real seekable |
340 | handle with an file descriptor. Defaults to a tempoary IO::File instance. |
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341 | |
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342 | =item stdout |
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343 | |
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344 | Accessor for handle that will be used for STDOUT, must be a real seekable |
345 | handle with an file descriptor. Defaults to a tempoary IO::File instance. |
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346 | |
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347 | =item stderr |
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348 | |
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349 | Accessor for handle that will be used for STDERR, must be a real seekable |
350 | handle with an file descriptor. |
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351 | |
352 | =back |
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353 | |
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354 | =head1 SEE ALSO |
355 | |
356 | =over 4 |
357 | |
358 | =item examples directory in this distribution. |
359 | |
360 | =item L<WWW::Mechanize::CGI> |
361 | |
362 | =item L<Test::WWW::Mechanize::CGI> |
363 | |
364 | =back |
365 | |
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366 | =head1 THANKS TO |
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367 | |
368 | Thomas L. Shinnick for his valuable win32 testing. |
369 | |
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370 | =cut |