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1 | package Catalyst::Engine::FastCGI; |
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2 | |
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3 | use Moose; |
4 | extends 'Catalyst::Engine::CGI'; |
5 | |
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6 | # eval { Class::MOP::load_class("FCGI") }; |
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7 | eval "use FCGI"; |
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8 | die "Unable to load the FCGI module, you may need to install it:\n$@\n" if $@; |
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9 | |
10 | =head1 NAME |
11 | |
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12 | Catalyst::Engine::FastCGI - FastCGI Engine |
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13 | |
14 | =head1 DESCRIPTION |
15 | |
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16 | This is the FastCGI engine. |
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17 | |
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18 | =head1 OVERLOADED METHODS |
19 | |
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20 | This class overloads some methods from C<Catalyst::Engine::CGI>. |
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21 | |
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22 | =head2 $self->run($c, $listen, { option => value, ... }) |
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23 | |
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24 | Starts the FastCGI server. If C<$listen> is set, then it specifies a |
25 | location to listen for FastCGI requests; |
26 | |
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27 | =over 4 |
28 | |
29 | =item /path |
30 | |
31 | listen via Unix sockets on /path |
32 | |
33 | =item :port |
34 | |
35 | listen via TCP on port on all interfaces |
36 | |
37 | =item hostname:port |
38 | |
39 | listen via TCP on port bound to hostname |
40 | |
41 | =back |
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42 | |
43 | Options may also be specified; |
44 | |
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45 | =over 4 |
46 | |
47 | =item leave_umask |
48 | |
49 | Set to 1 to disable setting umask to 0 for socket open =item nointr |
50 | |
51 | Do not allow the listener to be interrupted by Ctrl+C |
52 | |
53 | =item nproc |
54 | |
55 | Specify a number of processes for FCGI::ProcManager |
56 | |
57 | =item pidfile |
58 | |
59 | Specify a filename for the pid file |
60 | |
61 | =item manager |
62 | |
63 | Specify a FCGI::ProcManager sub-class |
64 | |
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65 | =item detach |
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66 | |
67 | Detach from console |
68 | |
69 | =item keep_stderr |
70 | |
71 | Send STDERR to STDOUT instead of the webserver |
72 | |
73 | =back |
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74 | |
75 | =cut |
76 | |
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77 | sub run { |
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78 | my ( $self, $class, $listen, $options ) = @_; |
79 | |
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80 | my $sock = 0; |
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81 | if ($listen) { |
82 | my $old_umask = umask; |
83 | unless ( $options->{leave_umask} ) { |
84 | umask(0); |
85 | } |
86 | $sock = FCGI::OpenSocket( $listen, 100 ) |
87 | or die "failed to open FastCGI socket; $!"; |
88 | unless ( $options->{leave_umask} ) { |
89 | umask($old_umask); |
90 | } |
91 | } |
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92 | elsif ( $^O ne 'MSWin32' ) { |
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93 | -S STDIN |
94 | or die "STDIN is not a socket; specify a listen location"; |
95 | } |
96 | |
97 | $options ||= {}; |
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98 | |
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99 | my %env; |
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100 | my $error = \*STDERR; # send STDERR to the web server |
101 | $error = \*STDOUT # send STDERR to stdout (a logfile) |
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102 | if $options->{keep_stderr}; # (if asked to) |
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103 | |
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104 | my $request = |
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105 | FCGI::Request( \*STDIN, \*STDOUT, $error, \%env, $sock, |
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106 | ( $options->{nointr} ? 0 : &FCGI::FAIL_ACCEPT_ON_INTR ), |
107 | ); |
108 | |
109 | my $proc_manager; |
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110 | |
111 | if ($listen) { |
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112 | $options->{manager} ||= "FCGI::ProcManager"; |
113 | $options->{nproc} ||= 1; |
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114 | |
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115 | $self->daemon_fork() if $options->{detach}; |
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116 | |
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117 | if ( $options->{manager} ) { |
118 | eval "use $options->{manager}; 1" or die $@; |
119 | |
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120 | $proc_manager = $options->{manager}->new( |
121 | { |
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122 | n_processes => $options->{nproc}, |
123 | pid_fname => $options->{pidfile}, |
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124 | } |
125 | ); |
126 | |
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127 | # detach *before* the ProcManager inits |
128 | $self->daemon_detach() if $options->{detach}; |
129 | |
130 | $proc_manager->pm_manage(); |
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131 | } |
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132 | elsif ( $options->{detach} ) { |
133 | $self->daemon_detach(); |
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134 | } |
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135 | } |
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136 | |
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137 | while ( $request->Accept >= 0 ) { |
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138 | $proc_manager && $proc_manager->pm_pre_dispatch(); |
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139 | |
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140 | # If we're running under Lighttpd, swap PATH_INFO and SCRIPT_NAME |
141 | # http://lists.rawmode.org/pipermail/catalyst/2006-June/008361.html |
142 | # Thanks to Mark Blythe for this fix |
143 | if ( $env{SERVER_SOFTWARE} && $env{SERVER_SOFTWARE} =~ /lighttpd/ ) { |
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144 | $env{PATH_INFO} ||= delete $env{SCRIPT_NAME}; |
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145 | } |
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146 | |
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147 | $class->handle_request( env => \%env ); |
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148 | |
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149 | $proc_manager && $proc_manager->pm_post_dispatch(); |
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150 | } |
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151 | } |
152 | |
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153 | =head2 $self->write($c, $buffer) |
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154 | |
155 | =cut |
156 | |
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157 | sub write { |
158 | my ( $self, $c, $buffer ) = @_; |
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159 | |
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160 | unless ( $self->{_prepared_write} ) { |
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161 | $self->prepare_write($c); |
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162 | $self->{_prepared_write} = 1; |
163 | } |
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164 | |
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165 | # XXX: We can't use Engine's write() method because syswrite |
166 | # appears to return bogus values instead of the number of bytes |
167 | # written: http://www.fastcgi.com/om_archive/mail-archive/0128.html |
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168 | |
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169 | # Prepend the headers if they have not yet been sent |
170 | if ( my $headers = delete $self->{_header_buf} ) { |
171 | $buffer = $headers . $buffer; |
172 | } |
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173 | |
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174 | # FastCGI does not stream data properly if using 'print $handle', |
175 | # but a syswrite appears to work properly. |
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176 | *STDOUT->syswrite($buffer); |
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177 | } |
178 | |
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179 | =head2 $self->daemon_fork() |
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180 | |
181 | Performs the first part of daemon initialisation. Specifically, |
182 | forking. STDERR, etc are still connected to a terminal. |
183 | |
184 | =cut |
185 | |
186 | sub daemon_fork { |
187 | require POSIX; |
188 | fork && exit; |
189 | } |
190 | |
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191 | =head2 $self->daemon_detach( ) |
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192 | |
193 | Performs the second part of daemon initialisation. Specifically, |
194 | disassociates from the terminal. |
195 | |
196 | However, this does B<not> change the current working directory to "/", |
197 | as normal daemons do. It also does not close all open file |
198 | descriptors (except STDIN, STDOUT and STDERR, which are re-opened from |
199 | F</dev/null>). |
200 | |
201 | =cut |
202 | |
203 | sub daemon_detach { |
204 | my $self = shift; |
205 | print "FastCGI daemon started (pid $$)\n"; |
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206 | open STDIN, "+</dev/null" or die $!; |
207 | open STDOUT, ">&STDIN" or die $!; |
208 | open STDERR, ">&STDIN" or die $!; |
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209 | POSIX::setsid(); |
210 | } |
211 | |
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212 | 1; |
213 | __END__ |
214 | |
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215 | =head1 WEB SERVER CONFIGURATIONS |
216 | |
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217 | =head2 Standalone FastCGI Server |
218 | |
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219 | In server mode the application runs as a standalone server and accepts |
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220 | connections from a web server. The application can be on the same machine as |
221 | the web server, on a remote machine, or even on multiple remote machines. |
222 | Advantages of this method include running the Catalyst application as a |
223 | different user than the web server, and the ability to set up a scalable |
224 | server farm. |
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225 | |
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226 | To start your application in server mode, install the FCGI::ProcManager |
227 | module and then use the included fastcgi.pl script. |
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228 | |
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229 | $ script/myapp_fastcgi.pl -l /tmp/myapp.socket -n 5 |
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230 | |
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231 | Command line options for fastcgi.pl include: |
232 | |
233 | -d -daemon Daemonize the server. |
234 | -p -pidfile Write a pidfile with the pid of the process manager. |
235 | -l -listen Listen on a socket path, hostname:port, or :port. |
236 | -n -nproc The number of processes started to handle requests. |
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237 | |
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238 | See below for the specific web server configurations for using the external |
239 | server. |
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240 | |
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241 | =head2 Apache 1.x, 2.x |
242 | |
243 | Apache requires the mod_fastcgi module. The same module supports both |
244 | Apache 1 and 2. |
245 | |
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246 | There are three ways to run your application under FastCGI on Apache: server, |
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247 | static, and dynamic. |
248 | |
249 | =head3 Standalone server mode |
250 | |
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251 | FastCgiExternalServer /tmp/myapp.fcgi -socket /tmp/myapp.socket |
252 | Alias /myapp/ /tmp/myapp/myapp.fcgi/ |
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253 | |
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254 | # Or, run at the root |
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255 | Alias / /tmp/myapp.fcgi/ |
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256 | |
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257 | # Optionally, rewrite the path when accessed without a trailing slash |
258 | RewriteRule ^/myapp$ myapp/ [R] |
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259 | |
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260 | |
261 | The FastCgiExternalServer directive tells Apache that when serving |
262 | /tmp/myapp to use the FastCGI application listenting on the socket |
263 | /tmp/mapp.socket. Note that /tmp/myapp.fcgi does not need to exist -- |
264 | it's a virtual file name. With some versions of C<mod_fastcgi> or |
265 | C<mod_fcgid>, you can use any name you like, but most require that the |
266 | virtual filename end in C<.fcgi>. |
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267 | |
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268 | It's likely that Apache is not configured to serve files in /tmp, so the |
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269 | Alias directive maps the url path /myapp/ to the (virtual) file that runs the |
270 | FastCGI application. The trailing slashes are important as their use will |
271 | correctly set the PATH_INFO environment variable used by Catalyst to |
272 | determine the request path. If you would like to be able to access your app |
273 | without a trailing slash (http://server/myapp), you can use the above |
274 | RewriteRule directive. |
275 | |
276 | =head3 Static mode |
277 | |
278 | The term 'static' is misleading, but in static mode Apache uses its own |
279 | FastCGI Process Manager to start the application processes. This happens at |
280 | Apache startup time. In this case you do not run your application's |
281 | fastcgi.pl script -- that is done by Apache. Apache then maps URIs to the |
282 | FastCGI script to run your application. |
283 | |
284 | FastCgiServer /path/to/myapp/script/myapp_fastcgi.pl -processes 3 |
285 | Alias /myapp/ /path/to/myapp/script/myapp_fastcgi.pl/ |
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286 | |
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287 | FastCgiServer tells Apache to start three processes of your application at |
288 | startup. The Alias command maps a path to the FastCGI application. Again, |
289 | the trailing slashes are important. |
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290 | |
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291 | =head3 Dynamic mode |
292 | |
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293 | In FastCGI dynamic mode, Apache will run your application on demand, |
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294 | typically by requesting a file with a specific extension (e.g. .fcgi). ISPs |
295 | often use this type of setup to provide FastCGI support to many customers. |
296 | |
297 | In this mode it is often enough to place or link your *_fastcgi.pl script in |
298 | your cgi-bin directory with the extension of .fcgi. In dynamic mode Apache |
299 | must be able to run your application as a CGI script so ExecCGI must be |
300 | enabled for the directory. |
301 | |
302 | AddHandler fastcgi-script .fcgi |
303 | |
304 | The above tells Apache to run any .fcgi file as a FastCGI application. |
305 | |
306 | Here is a complete example: |
307 | |
308 | <VirtualHost *:80> |
309 | ServerName www.myapp.com |
310 | DocumentRoot /path/to/MyApp |
311 | |
312 | # Allow CGI script to run |
313 | <Directory /path/to/MyApp> |
314 | Options +ExecCGI |
315 | </Directory> |
316 | |
317 | # Tell Apache this is a FastCGI application |
318 | <Files myapp_fastcgi.pl> |
319 | SetHandler fastcgi-script |
320 | </Files> |
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321 | </VirtualHost> |
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322 | |
323 | Then a request for /script/myapp_fastcgi.pl will run the |
324 | application. |
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325 | |
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326 | For more information on using FastCGI under Apache, visit |
327 | L<http://www.fastcgi.com/mod_fastcgi/docs/mod_fastcgi.html> |
328 | |
25f55123 |
329 | =head3 Authorization header with mod_fastcgi or mod_cgi |
330 | |
331 | By default, mod_fastcgi/mod_cgi do not pass along the Authorization header, |
332 | so modules like C<Catalyst::Plugin::Authentication::Credential::HTTP> will |
333 | not work. To enable pass-through of this header, add the following |
334 | mod_rewrite directives: |
335 | |
336 | RewriteCond %{HTTP:Authorization} ^(.+) |
337 | RewriteRule ^(.*)$ $1 [E=HTTP_AUTHORIZATION:%1,PT] |
338 | |
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339 | =head2 Lighttpd |
340 | |
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341 | These configurations were tested with Lighttpd 1.4.7. |
342 | |
343 | =head3 Standalone server mode |
344 | |
345 | server.document-root = "/var/www/MyApp/root" |
346 | |
347 | fastcgi.server = ( |
348 | "" => ( |
349 | "MyApp" => ( |
350 | "socket" => "/tmp/myapp.socket", |
351 | "check-local" => "disable" |
352 | ) |
353 | ) |
354 | ) |
355 | |
356 | =head3 Static mode |
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357 | |
358 | server.document-root = "/var/www/MyApp/root" |
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359 | |
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360 | fastcgi.server = ( |
361 | "" => ( |
362 | "MyApp" => ( |
363 | "socket" => "/tmp/myapp.socket", |
364 | "check-local" => "disable", |
365 | "bin-path" => "/var/www/MyApp/script/myapp_fastcgi.pl", |
366 | "min-procs" => 2, |
367 | "max-procs" => 5, |
368 | "idle-timeout" => 20 |
369 | ) |
370 | ) |
371 | ) |
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372 | |
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373 | Note that in newer versions of lighttpd, the min-procs and idle-timeout |
374 | values are disabled. The above example would start 5 processes. |
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375 | |
d7d72ad9 |
376 | =head3 Non-root configuration |
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377 | |
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378 | You can also run your application at any non-root location with either of the |
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379 | above modes. Note the required mod_rewrite rule. |
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380 | |
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381 | url.rewrite = ( "myapp\$" => "myapp/" ) |
198b0efa |
382 | fastcgi.server = ( |
d7d72ad9 |
383 | "/myapp" => ( |
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384 | "MyApp" => ( |
d7d72ad9 |
385 | # same as above |
198b0efa |
386 | ) |
387 | ) |
388 | ) |
389 | |
390 | For more information on using FastCGI under Lighttpd, visit |
391 | L<http://www.lighttpd.net/documentation/fastcgi.html> |
392 | |
393 | =head2 IIS |
394 | |
395 | It is possible to run Catalyst under IIS with FastCGI, but we do not |
396 | yet have detailed instructions. |
397 | |
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398 | =head1 SEE ALSO |
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399 | |
fbcc39ad |
400 | L<Catalyst>, L<FCGI>. |
cd3bb248 |
401 | |
fbcc39ad |
402 | =head1 AUTHORS |
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403 | |
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404 | Catalyst Contributors, see Catalyst.pm |
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405 | |
d7d72ad9 |
406 | =head1 THANKS |
407 | |
408 | Bill Moseley, for documentation updates and testing. |
409 | |
ffb41d94 |
410 | =head1 COPYRIGHT |
411 | |
412 | This program is free software, you can redistribute it and/or modify it under |
413 | the same terms as Perl itself. |
414 | |
415 | =cut |