Provided by: libmojolicious-perl_9.31+dfsg-1_all 
NAME
Mojolicious::Controller - Controller base class
SYNOPSIS
# Controller
package MyApp::Controller::Foo;
use Mojo::Base 'Mojolicious::Controller', -signatures;
# Action
sub bar ($self) {
my $name = $self->param('name');
$self->res->headers->cache_control('max-age=1, no-cache');
$self->render(json => {hello => $name});
}
DESCRIPTION
Mojolicious::Controller is the base class for your Mojolicious controllers. It is also the
default controller class unless you set "controller_class" in Mojolicious.
ATTRIBUTES
Mojolicious::Controller implements the following attributes.
app
my $app = $c->app;
$c = $c->app(Mojolicious->new);
A reference back to the application that dispatched to this controller, usually a
Mojolicious object. Note that this attribute is weakened.
# Use application logger
$c->app->log->debug('Hello Mojo');
# Generate path
my $path = $c->app->home->child('templates', 'foo', 'bar.html.ep');
match
my $m = $c->match;
$c = $c->match(Mojolicious::Routes::Match->new);
Router results for the current request, defaults to a Mojolicious::Routes::Match object.
# Introspect
my $name = $c->match->endpoint->name;
my $foo = $c->match->endpoint->pattern->defaults->{foo};
my $action = $c->match->stack->[-1]{action};
tx
my $tx = $c->tx;
$c = $c->tx(Mojo::Transaction::HTTP->new);
The transaction that is currently being processed, usually a Mojo::Transaction::HTTP or
Mojo::Transaction::WebSocket object. Note that this attribute is weakened. So the object
needs to be referenced elsewhere as well when you're performing non-blocking operations
and the underlying connection might get closed early.
# Check peer information
my $address = $c->tx->remote_address;
my $port = $c->tx->remote_port;
# Increase size limit for WebSocket messages to 16MiB
$c->tx->max_websocket_size(16777216) if $c->tx->is_websocket;
# Perform non-blocking operation without knowing the connection status
my $tx = $c->tx;
Mojo::IOLoop->timer(2 => sub {
$c->app->log->debug($tx->is_finished ? 'Finished' : 'In progress');
});
METHODS
Mojolicious::Controller inherits all methods from Mojo::Base and implements the following
new ones.
continue
$c->continue;
Continue dispatch chain from an intermediate destination with "continue" in
Mojolicious::Routes.
cookie
my $value = $c->cookie('foo');
$c = $c->cookie(foo => 'bar');
$c = $c->cookie(foo => 'bar', {path => '/'});
Access request cookie values and create new response cookies. If there are multiple values
sharing the same name, and you want to access more than just the last one, you can use
"every_cookie".
# Create response cookie with domain and expiration date
$c->cookie(user => 'sri', {domain => 'example.com', expires => time + 60});
# Create secure response cookie
$c->cookie(secret => 'I <3 Mojolicious', {secure => 1, httponly => 1});
every_cookie
my $values = $c->every_cookie('foo');
Similar to "cookie", but returns all request cookie values sharing the same name as an
array reference.
$ Get first cookie value
my $first = $c->every_cookie('foo')->[0];
every_param
my $values = $c->every_param('foo');
Similar to "param", but returns all values sharing the same name as an array reference.
# Get first value
my $first = $c->every_param('foo')->[0];
every_signed_cookie
my $values = $c->every_signed_cookie('foo');
Similar to "signed_cookie", but returns all signed request cookie values sharing the same
name as an array reference.
# Get first signed cookie value
my $first = $c->every_signed_cookie('foo')->[0];
finish
$c = $c->finish;
$c = $c->finish(1000);
$c = $c->finish(1003 => 'Cannot accept data!');
$c = $c->finish('Bye!');
Close WebSocket connection or long poll stream gracefully. This method will automatically
respond to WebSocket handshake requests with a 101 response status, to establish the
WebSocket connection.
helpers
my $helpers = $c->helpers;
Return a proxy object containing the current controller object and on which helpers
provided by "app" can be called. This includes all helpers from
Mojolicious::Plugin::DefaultHelpers and Mojolicious::Plugin::TagHelpers.
# Make sure to use the "title" helper and not the controller method
$c->helpers->title('Welcome!');
# Use a nested helper instead of the "reply" controller method
$c->helpers->reply->not_found;
on
my $cb = $c->on(finish => sub {...});
Subscribe to events of "tx", which is usually a Mojo::Transaction::HTTP or
Mojo::Transaction::WebSocket object. This method will automatically respond to WebSocket
handshake requests with a 101 response status, to establish the WebSocket connection.
# Do something after the transaction has been finished
$c->on(finish => sub ($c) {
$c->app->log->debug('All data has been sent');
});
# Receive WebSocket message
$c->on(message => sub ($c, $msg) {
$c->app->log->debug("Message: $msg");
});
# Receive JSON object via WebSocket message
$c->on(json => sub ($c, $hash) {
$c->app->log->debug("Test: $hash->{test}");
});
# Receive WebSocket "Binary" message
$c->on(binary => sub ($c, $bytes) {
my $len = length $bytes;
$c->app->log->debug("Received $len bytes");
});
param
my $value = $c->param('foo');
$c = $c->param(foo => 'ba;r');
$c = $c->param(foo => 'ba;r', 'baz');
$c = $c->param(foo => ['ba;r', 'baz']);
Access route placeholder values that are not reserved stash values, file uploads as well
as "GET" and "POST" parameters extracted from the query string and
"application/x-www-form-urlencoded" or "multipart/form-data" message body, in that order.
If there are multiple values sharing the same name, and you want to access more than just
the last one, you can use "every_param". Parts of the request body need to be loaded into
memory to parse "POST" parameters, so you have to make sure it is not excessively large.
There's a 16MiB limit for requests by default.
# Get first value
my $first = $c->every_param('foo')->[0];
For more control you can also access request information directly.
# Only GET parameters
my $foo = $c->req->query_params->param('foo');
# Only POST parameters
my $foo = $c->req->body_params->param('foo');
# Only GET and POST parameters
my $foo = $c->req->param('foo');
# Only file uploads
my $foo = $c->req->upload('foo');
render
my $bool = $c->render;
my $bool = $c->render(foo => 'bar', baz => 23);
my $bool = $c->render(template => 'foo/index');
my $bool = $c->render(template => 'index', format => 'html');
my $bool = $c->render(data => $bytes);
my $bool = $c->render(text => 'Hello!');
my $bool = $c->render(json => {foo => 'bar'});
my $bool = $c->render(handler => 'something');
my $bool = $c->render('foo/index');
Render content with "renderer" in Mojolicious and emit hooks "before_render" in
Mojolicious as well as "after_render" in Mojolicious, or dies if no response could be
generated. All additional key/value pairs get merged into the "stash".
# Render characters
$c->render(text => 'I ♥ Mojolicious!');
# Render characters (alternative)
$c->stash(text => 'I ♥ Mojolicious!')->render;
# Render binary data
use Mojo::JSON qw(encode_json);
$c->render(data => encode_json({test => 'I ♥ Mojolicious!'}));
# Render JSON
$c->render(json => {test => 'I ♥ Mojolicious!'});
# Render inline template
$c->render(inline => '<%= 1 + 1 %>');
# Render template "foo/bar.html.ep"
$c->render(template => 'foo/bar', format => 'html', handler => 'ep');
# Render template "test.*.*" with arbitrary values "foo" and "bar"
$c->render(template => 'test', foo => 'test', bar => 23);
# Render template "test.xml.*"
$c->render(template => 'test', format => 'xml');
# Render template "test.xml.*" (alternative)
$c->render('test', format => 'xml');
render_later
$c = $c->render_later;
Disable automatic rendering to delay response generation, only necessary if automatic
rendering would result in a response.
# Delayed rendering
$c->render_later;
Mojo::IOLoop->timer(2 => sub { $c->render(text => 'Delayed by 2 seconds!') });
render_maybe
my $bool = $c->render_maybe;
my $bool = $c->render_maybe(foo => 'bar', baz => 23);
my $bool = $c->render_maybe('foo/index', format => 'html');
Try to render content, but do not call "reply->not_found" in
Mojolicious::Plugin::DefaultHelpers if no response could be generated, all arguments get
localized automatically and are only available during this render operation, takes the
same arguments as "render".
# Render template "index_local" only if it exists
$c->render_maybe('index_local') or $c->render('index');
render_to_string
my $output = $c->render_to_string('foo/index', format => 'pdf');
Try to render content and return it wrapped in a Mojo::ByteStream object or return
"undef", all arguments get localized automatically and are only available during this
render operation, takes the same arguments as "render".
# Render inline template
my $two = $c->render_to_string(inline => '<%= 1 + 1 %>');
rendered
$c = $c->rendered;
$c = $c->rendered(302);
Finalize response and emit hook "after_dispatch" in Mojolicious, defaults to using a 200
response code.
# Custom response
$c->res->headers->content_type('text/plain');
$c->res->body('Hello World!');
$c->rendered(200);
req
my $req = $c->req;
Get Mojo::Message::Request object from "tx".
# Longer version
my $req = $c->tx->req;
# Extract request information
my $id = $c->req->request_id;
my $method = $c->req->method;
my $url = $c->req->url->to_abs;
my $info = $c->req->url->to_abs->userinfo;
my $host = $c->req->url->to_abs->host;
my $agent = $c->req->headers->user_agent;
my $custom = $c->req->headers->header('Custom-Header');
my $bytes = $c->req->body;
my $str = $c->req->text;
my $hash = $c->req->params->to_hash;
my $all = $c->req->uploads;
my $value = $c->req->json;
my $foo = $c->req->json('/23/foo');
my $dom = $c->req->dom;
my $bar = $c->req->dom('div.bar')->first->text;
res
my $res = $c->res;
Get Mojo::Message::Response object from "tx".
# Longer version
my $res = $c->tx->res;
# Force file download by setting a response header
$c->res->headers->content_disposition('attachment; filename=foo.png;');
# Use a custom response header
$c->res->headers->header('Custom-Header' => 'whatever');
# Make sure response is cached correctly
$c->res->headers->cache_control('public, max-age=300');
$c->res->headers->append(Vary => 'Accept-Encoding');
send
$c = $c->send({binary => $bytes});
$c = $c->send({text => $bytes});
$c = $c->send({json => {test => [1, 2, 3]}});
$c = $c->send([$fin, $rsv1, $rsv2, $rsv3, $op, $payload]);
$c = $c->send($chars);
$c = $c->send($chars => sub ($c) {...});
Send message or frame non-blocking via WebSocket, the optional drain callback will be
executed once all data has been written. This method will automatically respond to
WebSocket handshake requests with a 101 response status, to establish the WebSocket
connection.
# Send "Text" message
$c->send('I ♥ Mojolicious!');
# Send JSON object as "Text" message
$c->send({json => {test => 'I ♥ Mojolicious!'}});
# Send JSON object as "Binary" message
use Mojo::JSON qw(encode_json);
$c->send({binary => encode_json({test => 'I ♥ Mojolicious!'})});
# Send "Ping" frame
use Mojo::WebSocket qw(WS_PING);
$c->send([1, 0, 0, 0, WS_PING, 'Hello World!']);
# Make sure the first message has been written before continuing
$c->send('First message!' => sub ($c) { $c->send('Second message!') });
For mostly idle WebSockets you might also want to increase the inactivity timeout with
"inactivity_timeout" in Mojolicious::Plugin::DefaultHelpers, which usually defaults to 30
seconds.
# Increase inactivity timeout for connection to 300 seconds
$c->inactivity_timeout(300);
session
my $session = $c->session;
my $foo = $c->session('foo');
$c = $c->session({foo => 'bar'});
$c = $c->session(foo => 'bar');
Persistent data storage for the next few requests, all session data gets serialized with
Mojo::JSON and stored Base64 encoded in HMAC-SHA256 signed cookies, to prevent tampering.
Note that cookies usually have a 4096 byte (4KiB) limit, depending on browser.
# Manipulate session
$c->session->{foo} = 'bar';
my $foo = $c->session->{foo};
delete $c->session->{foo};
# Expiration date in seconds from now (persists between requests)
$c->session(expiration => 604800);
# Expiration date as absolute epoch time (only valid for one request)
$c->session(expires => time + 604800);
# Delete whole session by setting an expiration date in the past
$c->session(expires => 1);
signed_cookie
my $value = $c->signed_cookie('foo');
$c = $c->signed_cookie(foo => 'bar');
$c = $c->signed_cookie(foo => 'bar', {path => '/'});
Access signed request cookie values and create new signed response cookies. If there are
multiple values sharing the same name, and you want to access more than just the last one,
you can use "every_signed_cookie". Cookies are cryptographically signed with HMAC-SHA256,
to prevent tampering, and the ones failing signature verification will be automatically
discarded.
stash
my $hash = $c->stash;
my $foo = $c->stash('foo');
$c = $c->stash({foo => 'bar', baz => 23});
$c = $c->stash(foo => 'bar', baz => 23);
Non-persistent data storage and exchange for the current request, application wide default
values can be set with "defaults" in Mojolicious. Some stash values have a special meaning
and are reserved, the full list is currently "action", "app", "cb", "controller", "data",
"extends", "format", "handler", "inline", "json", "layout", "namespace", "path", "status",
"template", "text" and "variant". Note that all stash values with a "mojo.*" prefix are
reserved for internal use.
# Remove value
my $foo = delete $c->stash->{foo};
# Assign multiple values at once
$c->stash(foo => 'test', bar => 23);
url_for
my $url = $c->url_for;
my $url = $c->url_for(name => 'sebastian');
my $url = $c->url_for({name => 'sebastian'});
my $url = $c->url_for('test', name => 'sebastian');
my $url = $c->url_for('test', {name => 'sebastian'});
my $url = $c->url_for('/index.html');
my $url = $c->url_for('//example.com/index.html');
my $url = $c->url_for('http://example.com/index.html');
my $url = $c->url_for('mailto:sri@example.com');
my $url = $c->url_for('#whatever');
Generate a portable Mojo::URL object with base for a path, URL or route.
# Rebuild URL for the current route
$c->url_for;
# Rebuild URL for the current route, but replace the "name" placeholder value
$c->url_for(name => 'sebastian');
# Absolute URL for the current route
$c->url_for->to_abs;
# Build URL for route "test" with two placeholder values
$c->url_for('test', name => 'sebastian', foo => 'bar');
# "http://127.0.0.1:3000/index.html" if application was started with Morbo
$c->url_for('/index.html')->to_abs;
# "https://127.0.0.1:443/index.html" if application was started with Morbo
$c->url_for('/index.html')->to_abs->scheme('https')->port(443);
# "/index.html?foo=bar" if application is deployed under "/"
$c->url_for('/index.html')->query(foo => 'bar');
# "/myapp/index.html?foo=bar" if application is deployed under "/myapp"
$c->url_for('/index.html')->query(foo => 'bar');
You can also use the helper "url_with" in Mojolicious::Plugin::DefaultHelpers to inherit
query parameters from the current request.
# "/list?q=mojo&page=2" if current request was for "/list?q=mojo&page=1"
$c->url_with->query({page => 2});
url_for_asset
my $url = $c->url_for_asset('/app.js');
Generate a portable Mojo::URL object with base for a static asset.
write
$c = $c->write;
$c = $c->write('');
$c = $c->write($bytes);
$c = $c->write($bytes => sub ($c) {...});
Write dynamic content non-blocking, the optional drain callback will be executed once all
data has been written. Calling this method without a chunk of data will finalize the
response headers and allow for dynamic content to be written later.
# Keep connection alive (with Content-Length header)
$c->res->headers->content_length(6);
$c->write('Hel' => sub ($c) { $c->write('lo!') });
# Close connection when finished (without Content-Length header)
$c->write('Hel' => sub ($c) {
$c->write('lo!' => sub ($c) { $c->finish });
});
You can call "finish" or write an empty chunk of data at any time to end the stream.
HTTP/1.1 200 OK
Date: Sat, 13 Sep 2014 16:48:29 GMT
Content-Length: 6
Server: Mojolicious (Perl)
Hello!
HTTP/1.1 200 OK
Connection: close
Date: Sat, 13 Sep 2014 16:48:29 GMT
Server: Mojolicious (Perl)
Hello!
For Comet (long polling) you might also want to increase the inactivity timeout with
"inactivity_timeout" in Mojolicious::Plugin::DefaultHelpers, which usually defaults to 30
seconds.
# Increase inactivity timeout for connection to 300 seconds
$c->inactivity_timeout(300);
write_chunk
$c = $c->write_chunk;
$c = $c->write_chunk('');
$c = $c->write_chunk($bytes);
$c = $c->write_chunk($bytes => sub ($c) {...});
Write dynamic content non-blocking with chunked transfer encoding, the optional drain
callback will be executed once all data has been written. Calling this method without a
chunk of data will finalize the response headers and allow for dynamic content to be
written later.
# Make sure previous chunk has been written before continuing
$c->write_chunk('H' => sub ($c) {
$c->write_chunk('ell' => sub ($c) { $c->finish('o!') });
});
You can call "finish" or write an empty chunk of data at any time to end the stream.
HTTP/1.1 200 OK
Date: Sat, 13 Sep 2014 16:48:29 GMT
Transfer-Encoding: chunked
Server: Mojolicious (Perl)
1
H
3
ell
2
o!
0
HELPERS
In addition to the "ATTRIBUTES" and "METHODS" above you can also call helpers provided by
"app" on Mojolicious::Controller objects. This includes all helpers from
Mojolicious::Plugin::DefaultHelpers and Mojolicious::Plugin::TagHelpers.
# Call helpers
$c->layout('green');
$c->title('Welcome!');
# Longer version
$c->helpers->layout('green');
SEE ALSO
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.