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1 | package Catalyst::Engine::CGI; |
2 | |
3 | use strict; |
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4 | use base 'Catalyst::Engine'; |
5 | use NEXT; |
6 | use URI; |
7 | use URI::Query; |
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8 | |
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9 | =head1 NAME |
10 | |
11 | Catalyst::Engine::CGI - The CGI Engine |
12 | |
13 | =head1 SYNOPSIS |
14 | |
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15 | A script using the Catalyst::Engine::CGI module might look like: |
16 | |
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17 | #!/usr/bin/perl -w |
18 | |
19 | use strict; |
20 | use lib '/path/to/MyApp/lib'; |
21 | use MyApp; |
22 | |
23 | MyApp->run; |
24 | |
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25 | The application module (C<MyApp>) would use C<Catalyst>, which loads the |
26 | appropriate engine module. |
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27 | |
28 | =head1 DESCRIPTION |
29 | |
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30 | This is the Catalyst engine specialized for the CGI environment. |
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31 | |
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32 | =head1 OVERLOADED METHODS |
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33 | |
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34 | This class overloads some methods from C<Catalyst::Engine>. |
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35 | |
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36 | =over 4 |
37 | |
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38 | =item $self->finalize_headers($c) |
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39 | |
40 | =cut |
41 | |
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42 | sub finalize_headers { |
43 | my ( $self, $c ) = @_; |
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44 | |
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45 | $c->response->header( Status => $c->response->status ); |
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46 | |
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47 | print $c->response->headers->as_string("\015\012"); |
48 | print "\015\012"; |
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49 | } |
50 | |
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51 | =item $self->prepare_connection($c) |
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52 | |
53 | =cut |
54 | |
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55 | sub prepare_connection { |
56 | my ( $self, $c ) = @_; |
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57 | |
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58 | $c->request->address( $ENV{REMOTE_ADDR} ); |
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59 | |
60 | PROXY_CHECK: |
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61 | { |
62 | unless ( $c->config->{using_frontend_proxy} ) { |
63 | last PROXY_CHECK if $ENV{REMOTE_ADDR} ne '127.0.0.1'; |
64 | last PROXY_CHECK if $c->config->{ignore_frontend_proxy}; |
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65 | } |
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66 | last PROXY_CHECK unless $ENV{HTTP_X_FORWARDED_FOR}; |
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67 | |
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68 | # If we are running as a backend server, the user will always appear |
69 | # as 127.0.0.1. Select the most recent upstream IP (last in the list) |
70 | my ($ip) = $ENV{HTTP_X_FORWARDED_FOR} =~ /([^,\s]+)$/; |
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71 | $c->request->address($ip); |
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72 | } |
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73 | |
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74 | $c->request->hostname( $ENV{REMOTE_HOST} ); |
75 | $c->request->protocol( $ENV{SERVER_PROTOCOL} ); |
76 | $c->request->user( $ENV{REMOTE_USER} ); |
77 | $c->request->method( $ENV{REQUEST_METHOD} ); |
78 | |
79 | if ( $ENV{HTTPS} && uc( $ENV{HTTPS} ) eq 'ON' ) { |
80 | $c->request->secure(1); |
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81 | } |
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82 | |
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83 | if ( $ENV{SERVER_PORT} == 443 ) { |
84 | $c->request->secure(1); |
85 | } |
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86 | } |
87 | |
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88 | =item $self->prepare_headers($c) |
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89 | |
90 | =cut |
91 | |
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92 | sub prepare_headers { |
93 | my ( $self, $c ) = @_; |
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94 | |
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95 | # Read headers from %ENV |
96 | while ( my ( $header, $value ) = each %ENV ) { |
97 | next unless $header =~ /^(?:HTTP|CONTENT|COOKIE)/i; |
98 | ( my $field = $header ) =~ s/^HTTPS?_//; |
99 | $c->req->headers->header( $field => $value ); |
100 | } |
101 | } |
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102 | |
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103 | =item $self->prepare_path($c) |
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104 | |
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105 | =cut |
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106 | |
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107 | sub prepare_path { |
108 | my ( $self, $c ) = @_; |
109 | |
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110 | my $scheme = $c->request->secure ? 'https' : 'http'; |
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111 | my $host = $ENV{HTTP_HOST} || $ENV{SERVER_NAME}; |
112 | my $port = $ENV{SERVER_PORT} || 80; |
113 | my $base_path = $ENV{SCRIPT_NAME} || '/'; |
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114 | |
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115 | # If we are running as a backend proxy, get the true hostname |
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116 | PROXY_CHECK: |
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117 | { |
118 | unless ( $c->config->{using_frontend_proxy} ) { |
119 | last PROXY_CHECK if $host !~ /localhost|127.0.0.1/; |
120 | last PROXY_CHECK if $c->config->{ignore_frontend_proxy}; |
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121 | } |
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122 | last PROXY_CHECK unless $ENV{HTTP_X_FORWARDED_HOST}; |
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123 | |
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124 | $host = $ENV{HTTP_X_FORWARDED_HOST}; |
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125 | |
126 | # backend could be on any port, so |
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127 | # assume frontend is on the default port |
128 | $port = $c->request->secure ? 443 : 80; |
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129 | } |
130 | |
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131 | my $path = $base_path . $ENV{PATH_INFO}; |
132 | $path =~ s{^/+}{}; |
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133 | |
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134 | my $uri = URI->new; |
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135 | $uri->scheme($scheme); |
136 | $uri->host($host); |
137 | $uri->port($port); |
138 | $uri->path($path); |
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139 | $uri->query( $ENV{QUERY_STRING} ) if $ENV{QUERY_STRING}; |
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140 | |
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141 | # sanitize the URI |
142 | $uri = $uri->canonical; |
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143 | $c->request->uri($uri); |
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144 | |
145 | # set the base URI |
146 | # base must end in a slash |
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147 | $base_path .= '/' unless ( $base_path =~ /\/$/ ); |
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148 | my $base = $uri->clone; |
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149 | $base->path_query($base_path); |
150 | $c->request->base($base); |
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151 | } |
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152 | |
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153 | =item $self->prepare_query_parameters($c) |
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154 | |
155 | =cut |
156 | |
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157 | sub prepare_query_parameters { |
158 | my ( $self, $c ) = @_; |
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159 | |
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160 | my $u = URI::Query->new( $ENV{QUERY_STRING} ); |
161 | $c->request->query_parameters( { $u->hash } ); |
162 | } |
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163 | |
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164 | =item $self->prepare_write($c) |
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165 | |
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166 | Enable autoflush on the output handle for CGI-based engines. |
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167 | |
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168 | =cut |
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169 | |
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170 | sub prepare_write { |
171 | my ( $self, $c ) = @_; |
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172 | |
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173 | # Set the output handle to autoflush |
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174 | *STDOUT->autoflush(1); |
175 | |
176 | $self->NEXT::prepare_write($c); |
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177 | } |
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178 | |
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179 | =item $self->read_chunk($c, $buffer, $length) |
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180 | |
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181 | =cut |
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182 | |
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183 | sub read_chunk { shift; shift; *STDIN->sysread(@_); } |
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184 | |
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185 | =item $self->run |
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186 | |
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187 | =cut |
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188 | |
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189 | sub run { shift; shift->handle_request(@_) } |
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190 | |
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191 | =back |
192 | |
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193 | =head1 SEE ALSO |
194 | |
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195 | L<Catalyst> L<Catalyst::Engine>. |
196 | |
197 | =head1 AUTHORS |
198 | |
199 | Sebastian Riedel, <sri@cpan.org> |
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200 | |
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201 | Christian Hansen, <ch@ngmedia.com> |
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202 | |
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203 | Andy Grundman, <andy@hybridized.org> |
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204 | |
205 | =head1 COPYRIGHT |
206 | |
207 | This program is free software, you can redistribute it and/or modify it under |
208 | the same terms as Perl itself. |
209 | |
210 | =cut |
211 | |
212 | 1; |