Jifty::Web(3)

NAME
Jifty::Web - Web framework for a Jifty application

METHODS
new

Creates a new "Jifty::Web" object

mason

Returns a HTML::Mason::Request object

out

Send a string to the browser.

url

Returns the root url of this Jifty application. This is pulled from the configuration file. Takes an optional named path which will form the path part of the resulting URL.

serial

Returns a unique identifier, guaranteed to be unique within the runtime of a particular process (i.e., within the lifetime of Jifty.pm). There's no sort of global uniqueness guarantee, but it should be good enough for generating things like moniker names.

  SESSION MANAGEMENT
setup_session

Sets up the current "session" object (a Jifty::Web::Session tied hash). Aborts if the session is already loaded.

session

Returns the current session's hash. In a regular user environment, it persists, but a request can stop that by handing it a regular hash to use.

  CURRENT USER
current_user [USER]

Getter/setter for the current user; this gets or sets the 'user' key in the session. These are Jifty::Record objects.

If a temporary_current_user has been set, will return that instead.

If the current application has no loaded current user, we get an empty app-specific "CurrentUser" object. (This "ApplicationClass"::CurrentUser class, a subclass of Jifty::CurrentUser, is autogenerated if it doesn't exist).

temporary_current_user [USER]

Sets the current request's current_user to USER if set.

This value will _not_ be persisted to the session at the end of the request. To restore the original value, set temporary_current_user to undef.

  REQUEST
handle_request [REQUEST]

This method sets up a current session, and then processes the given Jifty::Request object. If no request object is given, processes the request object in "request".

Each action on the request is vetted in three ways -- first, it must be marked as "active" by the Jifty::Request (this is the default). Second, it must be in the set of allowed classes of actions (see "is_allowed" in Jifty::API). Finally, the action must validate. If it passes all of these criteria, the action is fit to be run.

Before they are run, however, the request has a chance to be interrupted and saved away into a continuation, to be resumed at some later point. This is handled by "save_continuation" in Jifty::Request.

If the continuation isn't being saved, then "handle_request" goes on to run all of the actions. If all of the actions are successful, it looks to see if the request wished to call any continuations, possibly jumping back and re-running a request that was interrupted in the past. This is handled by "call_continuation" in Jifty::Request.

For more details about continuations, see Jifty::Continuation.

request [VALUE]

Gets or sets the current Jifty::Request object.

response [VALUE]

Gets or sets the current Jifty::Response object.

form

Returns the current Jifty::Web::Form object, creating one if there isn't one already.

new_action class => CLASS, moniker => MONIKER, order => ORDER, arguments => PARAMHASH

Creates a new action (an instance of a subclass of Jifty::Action). The named arguments passed to this method are passed on to the "new" method of the action named in "CLASS". If you pass an odd number of arguments, then the first argument is interpreted as "class".

Arguments

class
    "CLASS" is qualified, and an instance of that class is created, passing the "Jifty::Web" object, the "MONIKER", and any other arguments that "new_action" was supplied.

moniker
    "MONIKER" is a unique designator of an action on a page. The moniker is content-free and non-fattening, and may be auto-generated. It is used to tie together arguments that relate to the same action.

order
    "ORDER" defines the order in which the action is run, with lower numerical values running first.

arguments
    "ARGUMENTS" are passed to the "new" in Jifty::Action method. In addition, if the current request ("$self->request") contains an action with a matching moniker, any arguments that are in that requested action but not in the "PARAMHASH" list are set. This implements "sticky fields".

As a contrast to "add_action" in Jifty::Web::Form, this does not add the action to the current form -- instead, the first form field to be rendered will automatically register the action in the current form field at that time.

new_action_from_request REQUESTACTION

Given a Jifty::Request::Action, creates a new action using "new_action".

failed_actions

Returns an array of Jifty::Action objects, one for each Jifty::Request::Action that is marked as failed in the current response.

succeeded_actions

As "failed_actions", but for actions that completed successfully; less often used.

  REDIRECTS AND CONTINUATIONS
next_page [VALUE]

Gets or sets the next page for the framework to show. This is normally set during the "take_action" method or a Jifty::Action

force_redirect [VALUE]

Gets or sets whether we should force a redirect to "next_page", even if it's already the current page. You might set this, e.g. to force a redirect after a POSTed action.

redirect_required

Returns true if we need to redirect, now that we've processed all the actions. We need a redirect if either "next_page" is different from the current page, or "force_redirect" has been set.

webservices_redirect [TO]

Handle redirection inside webservices call. This is meant to be hooked by plugin that knows what to do with it.

redirect [TO]

Redirect to the next page. If you pass this method a parameter, it redirects to that URL rather than next_page.

It creates a continuation of where you want to be, and then calls it. If you want to redirect to a page with parameters, pass in a Jifty::Web::Form::Clickable object.

caller

Returns the Jifty::Request of our enclosing continuation, or an empty Jifty::Request if we are not in a continuation.

  HTML GENERATION
tangent PARAMHASH

If called in non-void context, creates and renders a Jifty::Web::Form::Clickable with the given PARAMHASH, forcing a continuation save.

In void context, does a redirect to the URL that the Jifty::Web::Form::Clickable object generates.

Both of these versions preserve all state variables by default.

goto PARAMHASH

Does an instant redirect to the url generated by the Jifty::Web::Form::Clickable object generated by the PARAMHASH.

link PARAMHASH

Generates and renders a Jifty::Web::Form::Clickable using the given PARAMHASH.

return PARAMHASH

If called in non-void context, creates and renders a Jifty::Web::Form::Clickable using the given PARAMHASH, additionally defaults to calling the current continuation.

Takes an additional argument, "to", which can specify a default path to return to if there is no current continuation.

In void context, does a redirect to the URL that the Jifty::Web::Form::Clickable object generates.

  template_exists PATH
Returns true if PATH is a valid template inside your template root. This checks for both Template::Declare and HTML::Mason Templates. Specifically, returns a reference to the handler which can process the template.

If PATH is a reference to the path, it will update the path to append "/index.html" if the path in question doesn't exist, but the index does.

  render_template PATH
Use our templating system to render a template. Searches through "view_handlers" in Jifty::Handler to find the first handler which provides the given template, and caches the handler for future requests.

Catches errors, and redirects to "/errors/500"; also shows "/errors/404" if the template cannot be found.

render_messages [MONIKER]

Outputs any messages that have been added, in <div id="messages"> and <div id="errors"> tags. Messages are added by calling "message" in Jifty::Result.

If a moniker is specified, only messages for that moniker are rendered.

render_success_messages [MONIKER]

Render success messages for the given moniker, or all of them if no moniker is given.

render_error_messages [MONIKER]

Render error messages for the given moniker, or all of them if no moniker is given.

_render_messages TYPE [MONIKER]

Output any messages of the given TYPE (either 'error' or 'message') in a <div id="TYPEs"> tag. If a moniker is given, only renders messages for that action. Internal helper for "render_success_messages" and "render_errors".

query_string KEY => VALUE [, KEY => VALUE [, ...]]

Returns an URL-encoded query string piece representing the arguments passed to it.

escape STRING

HTML-escapes the given string and returns it

escape_uri STRING

URI-escapes the given string and returns it

navigation

Returns the Jifty::Web::Menu for this web request; one is automatically created if it hasn't been already.

page_navigation

Returns the Jifty::Web::Menu for this web request; one is automatically created if it hasn't been already. This is useful for separating page-level navigation from app-level navigation.

include_css

Returns a "<link>" tag for the compressed CSS

add_css FILE1, FILE2, ...

Pushes files onto "Jifty->web->css_files"

include_javascript

Returns a "<script>" tag for the compressed Javascript.

Your application specific javascript goes in share/web/static/js/app.js. This will be automagically included if it exists.

If you want to add javascript behaviour to your page using CSS selectors then put your behaviour rules in share/web/static/js/app_behaviour.js which will also be automagically included if it exists. The "behaviour.js" library is included by Jifty. For more information on "behaviour.js" see <http://bennolan.com/behaviour/>.

However if you want to include other javascript libraries you need to add them to the javascript_libs array of your application. Do this in the "start" sub of your main application class. For example if your application is Foo then in "Foo.pm" in lib

 sub start {
     Jifty->web->add_javascript(qw( jslib1.js jslib2.js ) );
 }

The add_javascript method will append the files to javascript_libs. If you need a different order, you'll have to massage javascript_libs directly.

Jifty will look for javascript libraries under share/web/static/js/ by default as well as any plugin static roots.

add_javascript FILE1, FILE2, ...

Pushes files onto "Jifty->web->javascript_libs"

remove_javascript FILE1, FILE2, ...

Removes the given files from "Jifty->web->javascript_libs".

This is intended for plugins or applications that provide another version of the functionality given in our default JS libraries. For example, the CSSQuery plugin will get rid of the cssQuery-jQuery.js back-compat script.

add_external_javascript URL1, URL2, ...

Pushes URLs onto "Jifty->web->external_javascript_libs"

  STATE VARIABLES
get_variable NAME

Gets a page specific variable from the request object.

set_variable NAME VALUE

Takes a key-value pair for variables to serialize and hand off to the next page.

Behind the scenes, these variables get serialized into every link or form that is marked as 'state preserving'. See Jifty::Web::Form::Clickable.

Passing "undef" as a value will remove the variable

state_variables

Returns all of the state variables that have been set for the next request, as a hash;

N.B. These are not prefixed with "J:V-", as they were in earlier versions of Jifty

clear_state_variables

Remove all the state variables to be serialized for the next request.

  REGIONS
get_region [QUALIFIED NAME]

Given a fully "QUALIFIED NAME" of a region, returns the Jifty::Web::PageRegion with that name, or undef if no such region exists.

region PARAMHASH

The provided PARAMHASH is used to create and render a Jifty::Web::PageRegion; the "PARAMHASH" is passed directly to its "new" in Jifty::Web::PageRegion method, and then "render" in Jifty::Web::PageRegion is called.

replace_current_region PATH

Replaces the current region with a new region and renders it Returns undef if there's no current region

current_region

Returns the current Jifty::Web::PageRegion, or undef if there is none.

qualified_region [REGION]

Returns the fully qualified name of the current Jifty::Web::PageRegion, or the empty string if there is none. If "REGION" is supplied, gives the qualified name of "REGION" were it placed in the current region. You may also use a literal region name.

qualified_parent_region [REGION]

Returns the fully qualified name of the current Jifty::Web::PageRegion's parent, or the empty string if there is none. If "REGION" is supplied, gives the qualified name of "REGION" were it placed in the parent region. You may also use a literal region name.

  is_ssl
Indicates whether the current request was made using SSL.