1 package Web::Simple::Application;
3 use Scalar::Util 'weaken';
11 +{ $self->default_config }
14 my ($self, $value) = @_;
15 my %default = $self->default_config;
16 my @not = grep !exists $value->{$_}, keys %default;
17 @{$value}{@not} = @default{@not};
21 sub default_config { () }
23 has '_dispatcher' => (is => 'lazy');
25 sub _build__dispatcher {
27 require Web::Dispatch;
28 require Web::Simple::DispatchNode;
29 my $final = $self->_build_final_dispatcher;
31 # We need to weaken both the copy of $self that the
32 # app parameter will close over and the copy that'll
33 # be passed through as a node argument.
35 # To ensure that this doesn't then result in us being
36 # DESTROYed unexpectedly early, our to_psgi_app method
37 # closes back over $self
40 my $node_args = { app_object => $self };
41 weaken($node_args->{app_object});
43 app => sub { $self->dispatch_request(@_), $final },
44 node_class => 'Web::Simple::DispatchNode',
45 node_args => $node_args
49 sub _build_final_dispatcher {
50 [ 404, [ 'Content-type', 'text/plain' ], [ 'Not found' ] ]
54 # ->to_psgi_app is true for require() but also works for plackup
55 return $_[0]->to_psgi_app if caller(1);
56 my $self = ref($_[0]) ? $_[0] : $_[0]->new;
62 require Plack::Handler::CGI;
63 Plack::Handler::CGI->new->run($self->to_psgi_app);
68 require Plack::Handler::FCGI;
69 Plack::Handler::FCGI->new->run($self->to_psgi_app);
73 my $self = ref($_[0]) ? $_[0] : $_[0]->new;
74 my $app = $self->_dispatcher->to_app;
76 # Close over $self to keep $self alive even though
77 # we weakened the copies the dispatcher has; the
78 # if 0 causes the ops to be optimised away to
79 # minimise the performance impact and avoid void
80 # context warnings while still doing the closing
81 # over part. As Mithaldu said: "Gnarly." ...
83 return sub { $self if 0; goto &$app; };
89 $ENV{PHP_FCGI_CHILDREN} || $ENV{FCGI_ROLE} || $ENV{FCGI_SOCKET_PATH}
90 || ( -S STDIN && !$ENV{GATEWAY_INTERFACE} )
91 # If STDIN is a socket, almost certainly FastCGI, except for mod_cgid
93 return $self->_run_fcgi;
94 } elsif ($ENV{GATEWAY_INTERFACE}) {
95 return $self->_run_cgi;
97 unless (@ARGV && $ARGV[0] =~ m{^[A-Z/]}) {
98 return $self->_run_cli(@ARGV);
103 unshift(@args, 'GET') if $args[0] =~ m{^/};
105 $self->_run_cli_test_request(@args);
108 sub _test_request_spec_to_http_request {
109 my ($self, $method, $path, @rest) = @_;
111 # if it's a reference, assume a request object
112 return $method if ref($method);
114 my $request = HTTP::Request->new($method => $path);
118 while (my ($header, $value) = splice(@rest, 0, 2)) {
119 unless ($header =~ s/:$//) {
120 push @params, $header, $value;
123 if ($header eq 'Content') {
124 $request->content($value);
126 $request->headers->push_header($header, $value);
130 if (($method eq 'POST' or $method eq 'PUT') and @params) {
133 my $url = URI->new('http:');
134 $url->query_form(@params);
137 $request->header('Content-Type' => 'application/x-www-form-urlencoded');
138 $request->header('Content-Length' => length($content));
139 $request->content($content);
145 sub run_test_request {
146 my ($self, @req) = @_;
148 require HTTP::Request;
151 my $request = $self->_test_request_spec_to_http_request(@req);
153 Plack::Test::test_psgi(
154 $self->to_psgi_app, sub { shift->($request) }
158 sub _run_cli_test_request {
159 my ($self, @req) = @_;
160 my $response = $self->run_test_request(@req);
162 binmode(STDOUT); binmode(STDERR); # for win32
164 print STDERR $response->status_line."\n";
165 print STDERR $response->headers_as_string("\n")."\n";
166 my $content = $response->content;
167 $content .= "\n" if length($content) and $content !~ /\n\z/;
168 print STDOUT $content if $content;
173 die $self->_cli_usage;
177 "To run this script in CGI test mode, pass a URL path beginning with /:\n".
187 Web::Simple::Application - A base class for your Web-Simple application
191 This is a base class for your L<Web::Simple> application. You probably don't
192 need to construct this class yourself, since L<Web::Simple> does the 'heavy
193 lifting' for you in that regards.
197 This class exposes the following public methods.
199 =head2 default_config
201 Merges with the C<config> initializer to provide configuration information for
202 your application. For example:
207 posts_dir => $FindBin::Bin.'/posts',
211 Now, the C<config> attribute of C<$self> will be set to a HashRef
212 containing keys 'title' and 'posts_dir'.
214 The keys from default_config are merged into any config supplied, so
215 if you construct your application like:
217 MyWebSimpleApp::Web->new(
218 config => { title => 'Spoon', environment => 'dev' }
221 then C<config> will contain:
225 posts_dir => '/path/to/myapp/posts',
231 The run_if_script method is designed to be used at the end of the script
232 or .pm file where your application class is defined - for example:
234 ## my_web_simple_app.pl
236 use Web::Simple 'HelloWorld';
241 sub dispatch_request {
243 [ 200, [ 'Content-type', 'text/plain' ], [ 'Hello world!' ] ]
246 [ 405, [ 'Content-type', 'text/plain' ], [ 'Method not allowed' ] ]
251 HelloWorld->run_if_script;
253 This returns a true value, so your file is now valid as a module - so
255 require 'my_web_simple_app.pl';
257 my $hw = HelloWorld->new;
259 will work fine (and you can rename it to lib/HelloWorld.pm later to make it
260 a real use-able module).
262 However, it detects if it's being run as a script (via testing $0) and if
263 so attempts to do the right thing.
265 If run under a CGI environment, your application will execute as a CGI.
267 If run under a FastCGI environment, your application will execute as a
268 FastCGI process (this works both for dynamic shared-hosting-style FastCGI
269 and for apache FastCgiServer style setups).
271 If run from the commandline with a URL path, it runs a GET request against
274 $ perl -Ilib examples/hello-world/hello-world.cgi /
276 Content-Type: text/plain
280 You can also provide a method name -
282 $ perl -Ilib examples/hello-world/hello-world.cgi POST /
283 405 Method Not Allowed
284 Content-Type: text/plain
288 For a POST or PUT request, pairs on the command line will be treated
289 as form variables. For any request, pairs on the command line ending in :
290 are treated as headers, and 'Content:' will set the request body -
292 $ ./myapp POST / Accept: text/html form_field_name form_field_value
294 $ ./myapp POST / Content-Type: text/json Content: '{ "json": "here" }'
296 The body of the response is sent to STDOUT and the headers to STDERR, so
298 $ ./myapp GET / >index.html
300 will generally do the right thing.
302 Additionally, you can treat the file as though it were a standard PSGI
303 application file (*.psgi). For example you can start up up with C<plackup>
305 plackup my_web_simple_app.pl
309 starman my_web_simple_app.pl
313 This method is called by L</run_if_script> to create the L<PSGI> app coderef
314 for use via L<Plack> and L<plackup>. If you want to globally add middleware,
315 you can override this method:
317 use Web::Simple 'HelloWorld';
324 around 'to_psgi_app', sub {
325 my ($orig, $self) = (shift, shift);
326 my $app = $self->$orig(@_);
328 enable ...; ## whatever middleware you want
334 This method can also be used to mount a Web::Simple application within
335 a separate C<*.psgi> file -
343 mount '/' => WSApp->to_psgi_app;
344 mount '/another' => AnotherWSApp->to_psgi_app;
347 This method can be called as a class method, in which case it implicitly
348 calls ->new, or as an object method ... in which case it doesn't.
352 Used for running your application under stand-alone CGI and FCGI modes.
354 I should document this more extensively but run_if_script will call it when
355 you need it, so don't worry about it too much.
357 =head2 run_test_request
359 my $res = $app->run_test_request(GET => '/' => %headers);
361 my $res = $app->run_test_request(POST => '/' => %headers_or_form);
363 my $res = $app->run_test_request($http_request);
365 Accepts either an L<HTTP::Request> object or ($method, $path) and runs that
366 request against the application, returning an L<HTTP::Response> object.
368 If the HTTP method is POST or PUT, then a series of pairs can be passed after
369 this to create a form style message body. If you need to test an upload, then
370 create an L<HTTP::Request> object by hand or use the C<POST> subroutine
371 provided by L<HTTP::Request::Common>.
373 If pairs are passed where the key ends in :, it is instead treated as a
376 my $res = $app->run_test_request(
378 'Accept:' => 'text/html',
379 some_form_key => 'value'
382 will do what you expect. You can also pass a special key of Content: to
383 set the request body:
385 my $res = $app->run_test_request(
387 'Content-Type:' => 'text/json',
388 'Content:' => '{ "json": "here" }',
393 See L<Web::Simple> for authors.
395 =head1 COPYRIGHT AND LICENSE
397 See L<Web::Simple> for the copyright and license.