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.\" ========================================================================
.\"
.IX Title "Mojolicious::Plugin::DefaultHelpers 3pm"
.TH Mojolicious::Plugin::DefaultHelpers 3pm 2024-05-15 "perl v5.38.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
Mojolicious::Plugin::DefaultHelpers \- Default helpers plugin
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 2
\&  # Mojolicious
\&  $app\->plugin(\*(AqDefaultHelpers\*(Aq);
\&
\&  # Mojolicious::Lite
\&  plugin \*(AqDefaultHelpers\*(Aq;
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
Mojolicious::Plugin::DefaultHelpers is a collection of helpers for Mojolicious.
.PP
This is a core plugin, that means it is always enabled and its code a good example for learning to build new plugins,
you're welcome to fork it.
.PP
See "PLUGINS" in Mojolicious::Plugins for a list of plugins that are available by default.
.SH HELPERS
.IX Header "HELPERS"
Mojolicious::Plugin::DefaultHelpers implements the following helpers.
.SS accepts
.IX Subsection "accepts"
.Vb 2
\&  my $formats = $c\->accepts;
\&  my $format  = $c\->accepts(\*(Aqhtml\*(Aq, \*(Aqjson\*(Aq, \*(Aqtxt\*(Aq);
.Ve
.PP
Select best possible representation for resource from \f(CW\*(C`format\*(C'\fR \f(CW\*(C`GET\*(C'\fR/\f(CW\*(C`POST\*(C'\fR parameter, \f(CW\*(C`format\*(C'\fR stash value or
\&\f(CW\*(C`Accept\*(C'\fR request header with "accepts" in Mojolicious::Renderer, defaults to returning the first extension if no
preference could be detected.
.PP
.Vb 2
\&  # Check if JSON is acceptable
\&  $c\->render(json => {hello => \*(Aqworld\*(Aq}) if $c\->accepts(\*(Aqjson\*(Aq);
\&
\&  # Check if JSON was specifically requested
\&  $c\->render(json => {hello => \*(Aqworld\*(Aq}) if $c\->accepts(\*(Aq\*(Aq, \*(Aqjson\*(Aq);
\&
\&  # Unsupported representation
\&  $c\->render(data => \*(Aq\*(Aq, status => 204)
\&    unless my $format = $c\->accepts(\*(Aqhtml\*(Aq, \*(Aqjson\*(Aq);
\&
\&  # Detected representations to select from
\&  my @formats = @{$c\->accepts};
.Ve
.SS app
.IX Subsection "app"
.Vb 1
\&  %= app\->secrets\->[0]
.Ve
.PP
Alias for "app" in Mojolicious::Controller.
.SS b
.IX Subsection "b"
.Vb 1
\&  %= b(\*(AqJoel is a slug\*(Aq)\->slugify
.Ve
.PP
Turn string into a Mojo::ByteStream object.
.SS c
.IX Subsection "c"
.Vb 1
\&  %= c(\*(Aqa\*(Aq, \*(Aqb\*(Aq, \*(Aqc\*(Aq)\->shuffle\->join
.Ve
.PP
Turn list into a Mojo::Collection object.
.SS config
.IX Subsection "config"
.Vb 1
\&  %= config \*(Aqsomething\*(Aq
.Ve
.PP
Alias for "config" in Mojolicious.
.SS content
.IX Subsection "content"
.Vb 7
\&  %= content foo => begin
\&    test
\&  % end
\&  %= content bar => \*(AqHello World!\*(Aq
\&  %= content \*(Aqfoo\*(Aq
\&  %= content \*(Aqbar\*(Aq
\&  %= content
.Ve
.PP
Store partial rendered content in a named buffer and retrieve it later, defaults to retrieving the named buffer
\&\f(CW\*(C`content\*(C'\fR, which is used by the renderer for the \f(CW\*(C`layout\*(C'\fR and \f(CW\*(C`extends\*(C'\fR features. New content will be ignored if the
named buffer is already in use.
.SS content_for
.IX Subsection "content_for"
.Vb 4
\&  % content_for foo => begin
\&    test
\&  % end
\&  %= content_for \*(Aqfoo\*(Aq
.Ve
.PP
Same as "content", but appends content to named buffers if they are already in use.
.PP
.Vb 7
\&  % content_for message => begin
\&    Hello
\&  % end
\&  % content_for message => begin
\&    world!
\&  % end
\&  %= content \*(Aqmessage\*(Aq
.Ve
.SS content_with
.IX Subsection "content_with"
.Vb 4
\&  % content_with foo => begin
\&    test
\&  % end
\&  %= content_with \*(Aqfoo\*(Aq
.Ve
.PP
Same as "content", but replaces content of named buffers if they are already in use.
.PP
.Vb 7
\&  % content message => begin
\&    world!
\&  % end
\&  % content_with message => begin
\&    Hello <%= content \*(Aqmessage\*(Aq %>
\&  % end
\&  %= content \*(Aqmessage\*(Aq
.Ve
.SS csrf_token
.IX Subsection "csrf_token"
.Vb 1
\&  %= csrf_token
.Ve
.PP
Get CSRF token from "session", and generate one if none exists.
.SS current_route
.IX Subsection "current_route"
.Vb 4
\&  % if (current_route \*(Aqlogin\*(Aq) {
\&    Welcome to Mojolicious!
\&  % }
\&  %= current_route
.Ve
.PP
Check or get name of current route.
.SS dumper
.IX Subsection "dumper"
.Vb 1
\&  %= dumper {some => \*(Aqdata\*(Aq}
.Ve
.PP
Dump a Perl data structure with "dumper" in Mojo::Util, very useful for debugging.
.SS exception_format
.IX Subsection "exception_format"
.Vb 2
\&  my $format = $c\->exception_format;
\&  $c         = $c\->exception_format(\*(Aqtxt\*(Aq);
.Ve
.PP
Format for HTTP exceptions (\f(CW\*(C`html\*(C'\fR, \f(CW\*(C`json\*(C'\fR, or \f(CW\*(C`txt\*(C'\fR), defaults to the value of "exception_format" in Mojolicious.
.SS extends
.IX Subsection "extends"
.Vb 2
\&  % extends \*(Aqblue\*(Aq;
\&  % extends \*(Aqblue\*(Aq, title => \*(AqBlue!\*(Aq;
.Ve
.PP
Set \f(CW\*(C`extends\*(C'\fR stash value, all additional key/value pairs get merged into the "stash".
.SS flash
.IX Subsection "flash"
.Vb 4
\&  my $foo = $c\->flash(\*(Aqfoo\*(Aq);
\&  $c      = $c\->flash({foo => \*(Aqbar\*(Aq});
\&  $c      = $c\->flash(foo => \*(Aqbar\*(Aq);
\&  %= flash \*(Aqfoo\*(Aq
.Ve
.PP
Data storage persistent only for the next request, stored in the "session".
.PP
.Vb 3
\&  # Show message after redirect
\&  $c\->flash(message => \*(AqUser created successfully!\*(Aq);
\&  $c\->redirect_to(\*(Aqshow_user\*(Aq, id => 23);
.Ve
.SS inactivity_timeout
.IX Subsection "inactivity_timeout"
.Vb 1
\&  $c = $c\->inactivity_timeout(3600);
.Ve
.PP
Use "stream" in Mojo::IOLoop to find the current connection and increase timeout if possible.
.PP
.Vb 2
\&  # Longer version
\&  Mojo::IOLoop\->stream($c\->tx\->connection)\->timeout(3600);
.Ve
.SS include
.IX Subsection "include"
.Vb 2
\&  %= include \*(Aqmenubar\*(Aq
\&  %= include \*(Aqmenubar\*(Aq, format => \*(Aqtxt\*(Aq
.Ve
.PP
Alias for "render_to_string" in Mojolicious::Controller.
.SS is_fresh
.IX Subsection "is_fresh"
.Vb 4
\&  my $bool = $c\->is_fresh;
\&  my $bool = $c\->is_fresh(etag => \*(Aqabc\*(Aq);
\&  my $bool = $c\->is_fresh(etag => \*(AqW/"def"\*(Aq);
\&  my $bool = $c\->is_fresh(last_modified => $epoch);
.Ve
.PP
Check freshness of request by comparing the \f(CW\*(C`If\-None\-Match\*(C'\fR and \f(CW\*(C`If\-Modified\-Since\*(C'\fR request headers to the \f(CW\*(C`ETag\*(C'\fR
and \f(CW\*(C`Last\-Modified\*(C'\fR response headers with "is_fresh" in Mojolicious::Static.
.PP
.Vb 4
\&  # Add ETag/Last\-Modified headers and check freshness before rendering
\&  $c\->is_fresh(etag => \*(Aqabc\*(Aq, last_modified => 1424985708)
\&    ? $c\->rendered(304)
\&    : $c\->render(text => \*(AqI ♥ Mojolicious!\*(Aq);
.Ve
.SS layout
.IX Subsection "layout"
.Vb 2
\&  % layout \*(Aqgreen\*(Aq;
\&  % layout \*(Aqgreen\*(Aq, title => \*(AqGreen!\*(Aq;
.Ve
.PP
Set \f(CW\*(C`layout\*(C'\fR stash value, all additional key/value pairs get merged into the "stash".
.SS log
.IX Subsection "log"
.Vb 1
\&  my $log = $c\->log;
.Ve
.PP
Alternative to "log" in Mojolicious that includes "request_id" in Mojo::Message::Request with every log message.
.PP
.Vb 2
\&  # Log message with context
\&  $c\->log\->debug(\*(AqThis is a log message with request id\*(Aq);
\&
\&  # Pass logger with context to model
\&  my $log = $c\->log;
\&  $c\->some_model\->create({foo => $foo}, $log);
.Ve
.SS param
.IX Subsection "param"
.Vb 1
\&  %= param \*(Aqfoo\*(Aq
.Ve
.PP
Alias for "param" in Mojolicious::Controller.
.SS proxy\->get_p
.IX Subsection "proxy->get_p"
.Vb 1
\&  my $promise = $c\->proxy\->get_p(\*(Aqhttp://example.com\*(Aq => {Accept => \*(Aq*/*\*(Aq});
.Ve
.PP
Perform non-blocking \f(CW\*(C`GET\*(C'\fR request and forward response as efficiently as possible, takes the same arguments as
"get" in Mojo::UserAgent and returns a Mojo::Promise object.
.PP
.Vb 5
\&  # Forward with exception handling
\&  $c\->proxy\->get_p(\*(Aqhttp://mojolicious.org\*(Aq)\->catch(sub ($err) {
\&    $c\->log\->debug("Proxy error: $err");
\&    $c\->render(text => \*(AqSomething went wrong!\*(Aq, status => 400);
\&  });
.Ve
.SS proxy\->post_p
.IX Subsection "proxy->post_p"
.Vb 1
\&  my $promise = $c\->proxy\->post_p(\*(Aqhttp://example.com\*(Aq => {Accept => \*(Aq*/*\*(Aq});
.Ve
.PP
Perform non-blocking \f(CW\*(C`POST\*(C'\fR request and forward response as efficiently as possible, takes the same arguments as
"post" in Mojo::UserAgent and returns a Mojo::Promise object.
.PP
.Vb 5
\&  # Forward with exception handling
\&  $c\->proxy\->post_p(\*(Aqexample.com\*(Aq => form => {test => \*(Aqpass\*(Aq})\->catch(sub ($err) {
\&    $c\->log\->debug("Proxy error: $err");
\&    $c\->render(text => \*(AqSomething went wrong!\*(Aq, status => 400);
\&  });
.Ve
.SS proxy\->start_p
.IX Subsection "proxy->start_p"
.Vb 1
\&  my $promise = $c\->proxy\->start_p(Mojo::Transaction::HTTP\->new);
.Ve
.PP
Perform non-blocking request for a custom Mojo::Transaction::HTTP object and forward response as efficiently as
possible, returns a Mojo::Promise object.
.PP
.Vb 6
\&  # Forward with exception handling
\&  my $tx = $c\->ua\->build_tx(GET => \*(Aqhttp://mojolicious.org\*(Aq);
\&  $c\->proxy\->start_p($tx)\->catch(sub ($err) {
\&    $c\->log\->debug("Proxy error: $err");
\&    $c\->render(text => \*(AqSomething went wrong!\*(Aq, status => 400);
\&  });
\&
\&  # Forward with custom request and response headers
\&  my $headers = $c\->req\->headers\->clone\->dehop;
\&  $headers\->header(\*(AqX\-Proxy\*(Aq => \*(AqMojo\*(Aq);
\&  my $tx = $c\->ua\->build_tx(GET => \*(Aqhttp://example.com\*(Aq => $headers\->to_hash);
\&  $c\->proxy\->start_p($tx);
\&  $tx\->res\->content\->once(body => sub ($content) { $c\->res\->headers\->header(\*(AqX\-Proxy\*(Aq => \*(AqMojo\*(Aq) });
.Ve
.SS redirect_to
.IX Subsection "redirect_to"
.Vb 4
\&  $c = $c\->redirect_to(\*(Aqnamed\*(Aq, foo => \*(Aqbar\*(Aq);
\&  $c = $c\->redirect_to(\*(Aqnamed\*(Aq, {foo => \*(Aqbar\*(Aq});
\&  $c = $c\->redirect_to(\*(Aq/index.html\*(Aq);
\&  $c = $c\->redirect_to(\*(Aqhttp://example.com/index.html\*(Aq);
.Ve
.PP
Prepare a \f(CW302\fR (if the status code is not already \f(CW\*(C`3xx\*(C'\fR) redirect response with \f(CW\*(C`Location\*(C'\fR header, takes the same
arguments as "url_for".
.PP
.Vb 3
\&  # Moved Permanently
\&  $c\->res\->code(301);
\&  $c\->redirect_to(\*(Aqsome_route\*(Aq);
\&
\&  # Temporary Redirect
\&  $c\->res\->code(307);
\&  $c\->redirect_to(\*(Aqsome_route\*(Aq);
.Ve
.SS reply\->asset
.IX Subsection "reply->asset"
.Vb 1
\&  $c\->reply\->asset(Mojo::Asset::File\->new);
.Ve
.PP
Reply with a Mojo::Asset::File or Mojo::Asset::Memory object using "serve_asset" in Mojolicious::Static, and
perform content negotiation with \f(CW\*(C`Range\*(C'\fR, \f(CW\*(C`If\-Modified\-Since\*(C'\fR and \f(CW\*(C`If\-None\-Match\*(C'\fR headers.
.PP
.Vb 5
\&  # Serve asset with custom modification time
\&  my $asset = Mojo::Asset::Memory\->new;
\&  $asset\->add_chunk(\*(AqHello World!\*(Aq)\->mtime(784111777);
\&  $c\->res\->headers\->content_type(\*(Aqtext/plain\*(Aq);
\&  $c\->reply\->asset($asset);
\&
\&  # Serve static file if it exists
\&  if (my $asset = $c\->app\->static\->file(\*(Aqimages/logo.png\*(Aq)) {
\&    $c\->res\->headers\->content_type(\*(Aqimage/png\*(Aq);
\&    $c\->reply\->asset($asset);
\&  }
.Ve
.SS reply\->exception
.IX Subsection "reply->exception"
.Vb 2
\&  $c = $c\->reply\->exception(\*(AqOops!\*(Aq);
\&  $c = $c\->reply\->exception(Mojo::Exception\->new);
.Ve
.PP
Render an exception response in the appropriate format by delegating to more specific exception helpers.
.SS reply\->file
.IX Subsection "reply->file"
.Vb 1
\&  $c\->reply\->file(\*(Aq/etc/passwd\*(Aq);
.Ve
.PP
Reply with a static file from an absolute path anywhere on the file system using "static" in Mojolicious.
.PP
.Vb 2
\&  # Longer version
\&  $c\->reply\->asset(Mojo::Asset::File\->new(path => \*(Aq/etc/passwd\*(Aq));
\&
\&  # Serve file from an absolute path with a custom content type
\&  $c\->res\->headers\->content_type(\*(Aqapplication/myapp\*(Aq);
\&  $c\->reply\->file(\*(Aq/home/sri/foo.txt\*(Aq);
\&
\&  # Serve file from a secret application directory
\&  $c\->reply\->file($c\->app\->home\->child(\*(Aqsecret\*(Aq, \*(Aqfile.txt\*(Aq));
.Ve
.SS reply\->html_exception
.IX Subsection "reply->html_exception"
.Vb 2
\&  $c = $c\->reply\->html_exception(\*(AqOops!\*(Aq);
\&  $c = $c\->reply\->html_exception(Mojo::Exception\->new);
.Ve
.PP
Render the exception template \f(CW\*(C`exception.$mode.$format.*\*(C'\fR or \f(CW\*(C`exception.$format.*\*(C'\fR and set the response status code
to \f(CW500\fR. Also sets the stash values \f(CW\*(C`exception\*(C'\fR to a Mojo::Exception object and \f(CW\*(C`snapshot\*(C'\fR to a copy of the
"stash" for use in the templates.
.SS reply\->html_not_found
.IX Subsection "reply->html_not_found"
.Vb 1
\&  $c = $c\->reply\->html_not_found;
.Ve
.PP
Render the not found template \f(CW\*(C`not_found.$mode.$format.*\*(C'\fR or \f(CW\*(C`not_found.$format.*\*(C'\fR and set the response status code
to \f(CW404\fR. Also sets the stash value \f(CW\*(C`snapshot\*(C'\fR to a copy of the "stash" for use in the templates.
.SS reply\->json_exception
.IX Subsection "reply->json_exception"
.Vb 2
\&  $c = $c\->reply\->json_exception(\*(AqOops!\*(Aq);
\&  $c = $c\->reply\->json_exception(Mojo::Exception\->new);
.Ve
.PP
Render a JSON response and set the response status to \f(CW500\fR.
.SS reply\->json_not_found
.IX Subsection "reply->json_not_found"
.Vb 1
\&  $c = $c\->reply\->json_not_found;
.Ve
.PP
Render a JSON response and set the response status to \f(CW404\fR.
.SS reply\->not_found
.IX Subsection "reply->not_found"
.Vb 1
\&  $c = $c\->reply\->not_found;
.Ve
.PP
Render a not found response in the appropriate format by delegating to more specific exception helpers.
.SS reply\->static
.IX Subsection "reply->static"
.Vb 2
\&  $c\->reply\->static(\*(Aqimages/logo.png\*(Aq);
\&  $c\->reply\->static(\*(Aq../lib/MyApp.pm\*(Aq);
.Ve
.PP
Reply with a static file using "static" in Mojolicious, usually from the \f(CW\*(C`public\*(C'\fR directories or \f(CW\*(C`DATA\*(C'\fR sections of
your application. Note that this helper uses a relative path, but does not protect from traversing to parent
directories.
.PP
.Vb 3
\&  # Serve file from a relative path with a custom content type
\&  $c\->res\->headers\->content_type(\*(Aqapplication/myapp\*(Aq);
\&  $c\->reply\->static(\*(Aqfoo.txt\*(Aq);
.Ve
.SS reply\->txt_exception
.IX Subsection "reply->txt_exception"
.Vb 2
\&  $c = $c\->reply\->txt_exception(\*(AqOops!\*(Aq);
\&  $c = $c\->reply\->txt_exception(Mojo::Exception\->new);
.Ve
.PP
Render a plain text response and set the response status to \f(CW500\fR.
.SS reply\->txt_not_found
.IX Subsection "reply->txt_not_found"
.Vb 1
\&  $c = $c\->reply\->txt_not_found;
.Ve
.PP
Render a plain text response and set the response status to \f(CW404\fR.
.SS respond_to
.IX Subsection "respond_to"
.Vb 5
\&  $c = $c\->respond_to(
\&    json => {json => {message => \*(AqWelcome!\*(Aq}},
\&    html => {template => \*(Aqwelcome\*(Aq},
\&    any  => sub {...}
\&  );
.Ve
.PP
Automatically select best possible representation for resource from \f(CW\*(C`format\*(C'\fR \f(CW\*(C`GET\*(C'\fR/\f(CW\*(C`POST\*(C'\fR parameter, \f(CW\*(C`format\*(C'\fR stash
value or \f(CW\*(C`Accept\*(C'\fR request header, defaults to "default_format" in Mojolicious::Renderer or rendering an empty \f(CW204\fR
response. Each representation can be handled with a callback or a hash reference containing arguments to be passed to
"render" in Mojolicious::Controller.
.PP
.Vb 6
\&  # Everything else than "json" and "xml" gets a 204 response
\&  $c\->respond_to(
\&    json => sub { $c\->render(json => {just => \*(Aqworks\*(Aq}) },
\&    xml  => {text => \*(Aq<just>works</just>\*(Aq},
\&    any  => {data => \*(Aq\*(Aq, status => 204}
\&  );
.Ve
.PP
For more advanced negotiation logic you can also use "accepts".
.SS session
.IX Subsection "session"
.Vb 1
\&  %= session \*(Aqfoo\*(Aq
.Ve
.PP
Alias for "session" in Mojolicious::Controller.
.SS stash
.IX Subsection "stash"
.Vb 2
\&  %= stash \*(Aqfoo\*(Aq
\&  % stash foo => \*(Aqbar\*(Aq;
.Ve
.PP
Alias for "stash" in Mojolicious::Controller.
.PP
.Vb 1
\&  %= stash(\*(Aqname\*(Aq) // \*(AqSomebody\*(Aq
.Ve
.SS timing\->begin
.IX Subsection "timing->begin"
.Vb 1
\&  $c\->timing\->begin(\*(Aqfoo\*(Aq);
.Ve
.PP
Create named timestamp for "timing\->elapsed".
.SS timing\->elapsed
.IX Subsection "timing->elapsed"
.Vb 1
\&  my $elapsed = $c\->timing\->elapsed(\*(Aqfoo\*(Aq);
.Ve
.PP
Return fractional amount of time in seconds since named timstamp has been created with "timing\->begin" or
\&\f(CW\*(C`undef\*(C'\fR if no such timestamp exists.
.PP
.Vb 5
\&  # Log timing information
\&  $c\->timing\->begin(\*(Aqdatabase_stuff\*(Aq);
\&  ...
\&  my $elapsed = $c\->timing\->elapsed(\*(Aqdatabase_stuff\*(Aq);
\&  $c\->app\->log\->debug("Database stuff took $elapsed seconds");
.Ve
.SS timing\->rps
.IX Subsection "timing->rps"
.Vb 1
\&  my $rps = $c\->timing\->rps(\*(Aq0.001\*(Aq);
.Ve
.PP
Return fractional number of requests that could be performed in one second if every singe one took the given amount of
time in seconds or \f(CW\*(C`undef\*(C'\fR if the number is too low.
.PP
.Vb 6
\&  # Log more timing information
\&  $c\->timing\->begin(\*(Aqweb_stuff\*(Aq);
\&  ...
\&  my $elapsed = $c\->timing\->elapsed(\*(Aqweb_stuff\*(Aq);
\&  my $rps     = $c\->timing\->rps($elapsed);
\&  $c\->app\->log\->debug("Web stuff took $elapsed seconds ($rps per second)");
.Ve
.SS timing\->server_timing
.IX Subsection "timing->server_timing"
.Vb 3
\&  $c\->timing\->server_timing(\*(Aqmetric\*(Aq);
\&  $c\->timing\->server_timing(\*(Aqmetric\*(Aq, \*(AqSome Description\*(Aq);
\&  $c\->timing\->server_timing(\*(Aqmetric\*(Aq, \*(AqSome Description\*(Aq, \*(Aq0.001\*(Aq);
.Ve
.PP
Create \f(CW\*(C`Server\-Timing\*(C'\fR header with optional description and duration.
.PP
.Vb 2
\&  # "Server\-Timing: miss"
\&  $c\->timing\->server_timing(\*(Aqmiss\*(Aq);
\&
\&  # "Server\-Timing: dc;desc=atl"
\&  $c\->timing\->server_timing(\*(Aqdc\*(Aq, \*(Aqatl\*(Aq);
\&
\&  # "Server\-Timing: db;desc=Database;dur=0.0001"
\&  $c\->timing\->begin(\*(Aqdatabase_stuff\*(Aq);
\&  ...
\&  my $elapsed = $c\->timing\->elapsed(\*(Aqdatabase_stuff\*(Aq);
\&  $c\->timing\->server_timing(\*(Aqdb\*(Aq, \*(AqDatabase\*(Aq, $elapsed);
\&
\&  # "Server\-Timing: miss, dc;desc=atl"
\&  $c\->timing\->server_timing(\*(Aqmiss\*(Aq);
\&  $c\->timing\->server_timing(\*(Aqdc\*(Aq, \*(Aqatl\*(Aq);
.Ve
.SS title
.IX Subsection "title"
.Vb 3
\&  %= title
\&  % title \*(AqWelcome!\*(Aq;
\&  % title \*(AqWelcome!\*(Aq, foo => \*(Aqbar\*(Aq;
.Ve
.PP
Get or set \f(CW\*(C`title\*(C'\fR stash value, all additional key/value pairs get merged into the "stash".
.SS ua
.IX Subsection "ua"
.Vb 1
\&  %= ua\->get(\*(Aqmojolicious.org\*(Aq)\->result\->dom\->at(\*(Aqtitle\*(Aq)\->text
.Ve
.PP
Alias for "ua" in Mojolicious.
.SS url_for
.IX Subsection "url_for"
.Vb 1
\&  %= url_for \*(Aqnamed\*(Aq, foo => \*(Aqbar\*(Aq, baz => \*(Aqyada\*(Aq
.Ve
.PP
Alias for "url_for" in Mojolicious::Controller.
.PP
.Vb 1
\&  %= url_for(\*(Aq/index.html\*(Aq)\->query(foo => \*(Aqbar\*(Aq)
.Ve
.SS url_for_asset
.IX Subsection "url_for_asset"
.Vb 1
\&  %= url_for_asset(\*(Aq/app.js\*(Aq);
.Ve
.PP
Alias for "url_for_asset" in Mojolicious::Controller.
.SS url_for_file
.IX Subsection "url_for_file"
.Vb 1
\&  %= url_for_file(\*(Aq/index.html\*(Aq);
.Ve
.PP
Alias for "url_for_file" in Mojolicious::Controller.
.SS url_with
.IX Subsection "url_with"
.Vb 1
\&  %= url_with \*(Aqnamed\*(Aq, foo => \*(Aqbar\*(Aq, baz => \*(Aqyada\*(Aq
.Ve
.PP
Does the same as "url_for", but inherits query parameters from the current request.
.PP
.Vb 1
\&  %= url_with\->query({page => 2})
.Ve
.SS validation
.IX Subsection "validation"
.Vb 1
\&  my $v = $c\->validation;
.Ve
.PP
Get Mojolicious::Validator::Validation object for current request to validate file uploads as well as \f(CW\*(C`GET\*(C'\fR and
\&\f(CW\*(C`POST\*(C'\fR parameters extracted from the query string and \f(CW\*(C`application/x\-www\-form\-urlencoded\*(C'\fR or \f(CW\*(C`multipart/form\-data\*(C'\fR
message body. Parts of the request body need to be loaded into memory to parse \f(CW\*(C`POST\*(C'\fR parameters, so you have to make
sure it is not excessively large. There's a 16MiB limit for requests by default.
.PP
.Vb 4
\&  # Validate GET/POST parameter
\&  my $v = $c\->validation;
\&  $v\->required(\*(Aqtitle\*(Aq, \*(Aqtrim\*(Aq)\->size(3, 50);
\&  my $title = $v\->param(\*(Aqtitle\*(Aq);
\&
\&  # Validate file upload
\&  my $v = $c\->validation;
\&  $v\->required(\*(Aqtarball\*(Aq)\->upload\->size(1, 1048576);
\&  my $tarball = $v\->param(\*(Aqtarball\*(Aq);
.Ve
.SH METHODS
.IX Header "METHODS"
Mojolicious::Plugin::DefaultHelpers inherits all methods from Mojolicious::Plugin and implements the following
new ones.
.SS register
.IX Subsection "register"
.Vb 1
\&  $plugin\->register(Mojolicious\->new);
.Ve
.PP
Register helpers in Mojolicious application.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.