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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") }; |
6f409682 |
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 | |
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49 | Set to 1 to disable setting umask to 0 for socket open |
50 | |
51 | =item nointr |
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52 | |
53 | Do not allow the listener to be interrupted by Ctrl+C |
54 | |
55 | =item nproc |
56 | |
57 | Specify a number of processes for FCGI::ProcManager |
58 | |
59 | =item pidfile |
60 | |
61 | Specify a filename for the pid file |
62 | |
63 | =item manager |
64 | |
65 | Specify a FCGI::ProcManager sub-class |
66 | |
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67 | =item detach |
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68 | |
69 | Detach from console |
70 | |
71 | =item keep_stderr |
72 | |
73 | Send STDERR to STDOUT instead of the webserver |
74 | |
75 | =back |
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76 | |
77 | =cut |
78 | |
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79 | sub run { |
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80 | my ( $self, $class, $listen, $options ) = @_; |
81 | |
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82 | my $sock = 0; |
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83 | if ($listen) { |
84 | my $old_umask = umask; |
85 | unless ( $options->{leave_umask} ) { |
86 | umask(0); |
87 | } |
88 | $sock = FCGI::OpenSocket( $listen, 100 ) |
89 | or die "failed to open FastCGI socket; $!"; |
90 | unless ( $options->{leave_umask} ) { |
91 | umask($old_umask); |
92 | } |
93 | } |
6f2e0021 |
94 | elsif ( $^O ne 'MSWin32' ) { |
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95 | -S STDIN |
96 | or die "STDIN is not a socket; specify a listen location"; |
97 | } |
98 | |
99 | $options ||= {}; |
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100 | |
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101 | my %env; |
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102 | my $error = \*STDERR; # send STDERR to the web server |
103 | $error = \*STDOUT # send STDERR to stdout (a logfile) |
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104 | if $options->{keep_stderr}; # (if asked to) |
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105 | |
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106 | my $request = |
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107 | FCGI::Request( \*STDIN, \*STDOUT, $error, \%env, $sock, |
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108 | ( $options->{nointr} ? 0 : &FCGI::FAIL_ACCEPT_ON_INTR ), |
109 | ); |
110 | |
111 | my $proc_manager; |
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112 | |
113 | if ($listen) { |
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114 | $options->{manager} ||= "FCGI::ProcManager"; |
115 | $options->{nproc} ||= 1; |
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116 | |
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117 | $self->daemon_fork() if $options->{detach}; |
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118 | |
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119 | if ( $options->{manager} ) { |
120 | eval "use $options->{manager}; 1" or die $@; |
121 | |
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122 | $proc_manager = $options->{manager}->new( |
123 | { |
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124 | n_processes => $options->{nproc}, |
125 | pid_fname => $options->{pidfile}, |
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126 | } |
127 | ); |
128 | |
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129 | # detach *before* the ProcManager inits |
130 | $self->daemon_detach() if $options->{detach}; |
131 | |
132 | $proc_manager->pm_manage(); |
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133 | } |
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134 | elsif ( $options->{detach} ) { |
135 | $self->daemon_detach(); |
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136 | } |
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137 | } |
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138 | |
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139 | while ( $request->Accept >= 0 ) { |
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140 | $proc_manager && $proc_manager->pm_pre_dispatch(); |
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141 | |
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142 | # If we're running under Lighttpd, swap PATH_INFO and SCRIPT_NAME |
143 | # http://lists.rawmode.org/pipermail/catalyst/2006-June/008361.html |
144 | # Thanks to Mark Blythe for this fix |
145 | if ( $env{SERVER_SOFTWARE} && $env{SERVER_SOFTWARE} =~ /lighttpd/ ) { |
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146 | $env{PATH_INFO} ||= delete $env{SCRIPT_NAME}; |
d7334071 |
147 | } |
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148 | |
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149 | $class->handle_request( env => \%env ); |
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150 | |
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151 | $proc_manager && $proc_manager->pm_post_dispatch(); |
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152 | } |
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153 | } |
154 | |
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155 | =head2 $self->write($c, $buffer) |
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156 | |
157 | =cut |
158 | |
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159 | sub write { |
160 | my ( $self, $c, $buffer ) = @_; |
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161 | |
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162 | unless ( $self->{_prepared_write} ) { |
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163 | $self->prepare_write($c); |
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164 | $self->{_prepared_write} = 1; |
165 | } |
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166 | |
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167 | # XXX: We can't use Engine's write() method because syswrite |
168 | # appears to return bogus values instead of the number of bytes |
169 | # written: http://www.fastcgi.com/om_archive/mail-archive/0128.html |
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170 | |
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171 | # Prepend the headers if they have not yet been sent |
172 | if ( my $headers = delete $self->{_header_buf} ) { |
173 | $buffer = $headers . $buffer; |
174 | } |
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175 | |
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176 | # FastCGI does not stream data properly if using 'print $handle', |
177 | # but a syswrite appears to work properly. |
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178 | *STDOUT->syswrite($buffer); |
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179 | } |
180 | |
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181 | =head2 $self->daemon_fork() |
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182 | |
183 | Performs the first part of daemon initialisation. Specifically, |
184 | forking. STDERR, etc are still connected to a terminal. |
185 | |
186 | =cut |
187 | |
188 | sub daemon_fork { |
189 | require POSIX; |
190 | fork && exit; |
191 | } |
192 | |
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193 | =head2 $self->daemon_detach( ) |
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194 | |
195 | Performs the second part of daemon initialisation. Specifically, |
196 | disassociates from the terminal. |
197 | |
198 | However, this does B<not> change the current working directory to "/", |
199 | as normal daemons do. It also does not close all open file |
200 | descriptors (except STDIN, STDOUT and STDERR, which are re-opened from |
201 | F</dev/null>). |
202 | |
203 | =cut |
204 | |
205 | sub daemon_detach { |
206 | my $self = shift; |
207 | print "FastCGI daemon started (pid $$)\n"; |
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208 | open STDIN, "+</dev/null" or die $!; |
209 | open STDOUT, ">&STDIN" or die $!; |
210 | open STDERR, ">&STDIN" or die $!; |
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211 | POSIX::setsid(); |
212 | } |
213 | |
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214 | 1; |
215 | __END__ |
216 | |
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217 | =head1 WEB SERVER CONFIGURATIONS |
218 | |
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219 | =head2 Standalone FastCGI Server |
220 | |
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221 | In server mode the application runs as a standalone server and accepts |
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222 | connections from a web server. The application can be on the same machine as |
223 | the web server, on a remote machine, or even on multiple remote machines. |
224 | Advantages of this method include running the Catalyst application as a |
225 | different user than the web server, and the ability to set up a scalable |
226 | server farm. |
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227 | |
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228 | To start your application in server mode, install the FCGI::ProcManager |
229 | module and then use the included fastcgi.pl script. |
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230 | |
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231 | $ script/myapp_fastcgi.pl -l /tmp/myapp.socket -n 5 |
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232 | |
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233 | Command line options for fastcgi.pl include: |
234 | |
235 | -d -daemon Daemonize the server. |
236 | -p -pidfile Write a pidfile with the pid of the process manager. |
237 | -l -listen Listen on a socket path, hostname:port, or :port. |
238 | -n -nproc The number of processes started to handle requests. |
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239 | |
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240 | See below for the specific web server configurations for using the external |
241 | server. |
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242 | |
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243 | =head2 Apache 1.x, 2.x |
244 | |
245 | Apache requires the mod_fastcgi module. The same module supports both |
246 | Apache 1 and 2. |
247 | |
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248 | There are three ways to run your application under FastCGI on Apache: server, |
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249 | static, and dynamic. |
250 | |
251 | =head3 Standalone server mode |
252 | |
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253 | FastCgiExternalServer /tmp/myapp.fcgi -socket /tmp/myapp.socket |
254 | Alias /myapp/ /tmp/myapp/myapp.fcgi/ |
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255 | |
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256 | # Or, run at the root |
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257 | Alias / /tmp/myapp.fcgi/ |
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258 | |
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259 | # Optionally, rewrite the path when accessed without a trailing slash |
260 | RewriteRule ^/myapp$ myapp/ [R] |
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261 | |
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262 | |
263 | The FastCgiExternalServer directive tells Apache that when serving |
264 | /tmp/myapp to use the FastCGI application listenting on the socket |
265 | /tmp/mapp.socket. Note that /tmp/myapp.fcgi does not need to exist -- |
266 | it's a virtual file name. With some versions of C<mod_fastcgi> or |
267 | C<mod_fcgid>, you can use any name you like, but most require that the |
268 | virtual filename end in C<.fcgi>. |
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269 | |
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270 | It's likely that Apache is not configured to serve files in /tmp, so the |
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271 | Alias directive maps the url path /myapp/ to the (virtual) file that runs the |
272 | FastCGI application. The trailing slashes are important as their use will |
273 | correctly set the PATH_INFO environment variable used by Catalyst to |
274 | determine the request path. If you would like to be able to access your app |
275 | without a trailing slash (http://server/myapp), you can use the above |
276 | RewriteRule directive. |
277 | |
278 | =head3 Static mode |
279 | |
280 | The term 'static' is misleading, but in static mode Apache uses its own |
281 | FastCGI Process Manager to start the application processes. This happens at |
282 | Apache startup time. In this case you do not run your application's |
283 | fastcgi.pl script -- that is done by Apache. Apache then maps URIs to the |
284 | FastCGI script to run your application. |
285 | |
286 | FastCgiServer /path/to/myapp/script/myapp_fastcgi.pl -processes 3 |
287 | Alias /myapp/ /path/to/myapp/script/myapp_fastcgi.pl/ |
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288 | |
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289 | FastCgiServer tells Apache to start three processes of your application at |
290 | startup. The Alias command maps a path to the FastCGI application. Again, |
291 | the trailing slashes are important. |
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292 | |
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293 | =head3 Dynamic mode |
294 | |
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295 | In FastCGI dynamic mode, Apache will run your application on demand, |
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296 | typically by requesting a file with a specific extension (e.g. .fcgi). ISPs |
297 | often use this type of setup to provide FastCGI support to many customers. |
298 | |
299 | In this mode it is often enough to place or link your *_fastcgi.pl script in |
300 | your cgi-bin directory with the extension of .fcgi. In dynamic mode Apache |
301 | must be able to run your application as a CGI script so ExecCGI must be |
302 | enabled for the directory. |
303 | |
304 | AddHandler fastcgi-script .fcgi |
305 | |
306 | The above tells Apache to run any .fcgi file as a FastCGI application. |
307 | |
308 | Here is a complete example: |
309 | |
310 | <VirtualHost *:80> |
311 | ServerName www.myapp.com |
312 | DocumentRoot /path/to/MyApp |
313 | |
314 | # Allow CGI script to run |
315 | <Directory /path/to/MyApp> |
316 | Options +ExecCGI |
317 | </Directory> |
318 | |
319 | # Tell Apache this is a FastCGI application |
320 | <Files myapp_fastcgi.pl> |
321 | SetHandler fastcgi-script |
322 | </Files> |
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323 | </VirtualHost> |
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324 | |
325 | Then a request for /script/myapp_fastcgi.pl will run the |
326 | application. |
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327 | |
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328 | For more information on using FastCGI under Apache, visit |
329 | L<http://www.fastcgi.com/mod_fastcgi/docs/mod_fastcgi.html> |
330 | |
25f55123 |
331 | =head3 Authorization header with mod_fastcgi or mod_cgi |
332 | |
333 | By default, mod_fastcgi/mod_cgi do not pass along the Authorization header, |
334 | so modules like C<Catalyst::Plugin::Authentication::Credential::HTTP> will |
335 | not work. To enable pass-through of this header, add the following |
336 | mod_rewrite directives: |
337 | |
338 | RewriteCond %{HTTP:Authorization} ^(.+) |
339 | RewriteRule ^(.*)$ $1 [E=HTTP_AUTHORIZATION:%1,PT] |
340 | |
198b0efa |
341 | =head2 Lighttpd |
342 | |
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343 | These configurations were tested with Lighttpd 1.4.7. |
344 | |
345 | =head3 Standalone server mode |
346 | |
347 | server.document-root = "/var/www/MyApp/root" |
348 | |
349 | fastcgi.server = ( |
350 | "" => ( |
351 | "MyApp" => ( |
352 | "socket" => "/tmp/myapp.socket", |
353 | "check-local" => "disable" |
354 | ) |
355 | ) |
356 | ) |
357 | |
358 | =head3 Static mode |
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359 | |
360 | server.document-root = "/var/www/MyApp/root" |
ac5c933b |
361 | |
198b0efa |
362 | fastcgi.server = ( |
363 | "" => ( |
364 | "MyApp" => ( |
365 | "socket" => "/tmp/myapp.socket", |
366 | "check-local" => "disable", |
367 | "bin-path" => "/var/www/MyApp/script/myapp_fastcgi.pl", |
368 | "min-procs" => 2, |
369 | "max-procs" => 5, |
370 | "idle-timeout" => 20 |
371 | ) |
372 | ) |
373 | ) |
ac5c933b |
374 | |
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375 | Note that in newer versions of lighttpd, the min-procs and idle-timeout |
376 | values are disabled. The above example would start 5 processes. |
25810c41 |
377 | |
d7d72ad9 |
378 | =head3 Non-root configuration |
ac5c933b |
379 | |
d7d72ad9 |
380 | You can also run your application at any non-root location with either of the |
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381 | above modes. Note the required mod_rewrite rule. |
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382 | |
2f381252 |
383 | url.rewrite = ( "myapp\$" => "myapp/" ) |
198b0efa |
384 | fastcgi.server = ( |
d7d72ad9 |
385 | "/myapp" => ( |
198b0efa |
386 | "MyApp" => ( |
d7d72ad9 |
387 | # same as above |
198b0efa |
388 | ) |
389 | ) |
390 | ) |
391 | |
392 | For more information on using FastCGI under Lighttpd, visit |
393 | L<http://www.lighttpd.net/documentation/fastcgi.html> |
394 | |
395 | =head2 IIS |
396 | |
397 | It is possible to run Catalyst under IIS with FastCGI, but we do not |
398 | yet have detailed instructions. |
399 | |
fbcc39ad |
400 | =head1 SEE ALSO |
e2fd5b5f |
401 | |
fbcc39ad |
402 | L<Catalyst>, L<FCGI>. |
cd3bb248 |
403 | |
fbcc39ad |
404 | =head1 AUTHORS |
ffb41d94 |
405 | |
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406 | Catalyst Contributors, see Catalyst.pm |
ffb41d94 |
407 | |
d7d72ad9 |
408 | =head1 THANKS |
409 | |
410 | Bill Moseley, for documentation updates and testing. |
411 | |
ffb41d94 |
412 | =head1 COPYRIGHT |
413 | |
414 | This program is free software, you can redistribute it and/or modify it under |
415 | the same terms as Perl itself. |
416 | |
417 | =cut |