Help language development. Donate to The Perl Foundation

Path::Router cpan:HANENKAMP last updated on 2018-11-12

Path-Router-0.2/

NAME

Path::Router - A tool for routing paths

SYNOPSIS

my $router = Path::Router.new;

$router.add-route('blog' => (
    defaults => {
        controller => 'blog',
        action     => 'index',
    },
    # you can provide a fixed "target"
    # for a match as well, this can be
    # anything you want it to be ...
    target => My::App.get_controller('blog').get_action('index')
));

$router.add-route('blog/:year/:month/:day' => (
    defaults => {
        controller => 'blog',
        action     => 'show_date',
    },
    # validate with ...
    validations => {
        # ... raw-Regexp refs
        year       => rx/\d ** 4/,
        # ... custom types you created
        month      => NumericMonth,
        # ... anon-subsets created inline
        day        => (anon subset NumericDay of Int where * <= 31),
    }
));

$router.add-route('blog/:action/?:id' => (
    defaults => {
        controller => 'blog',
    },
    validations => {
        action  => rx/\D+/,
        id      => Int,  # also use Perl6 types too
    }
));

# even include other routers
$router.include-router( 'polls/' => $another_router );

# ... in your dispatcher

# returns a Path::Router::Route::Match object
my $match = $router.match('/blog/edit/15');

# ... in your code

my $uri = $router.uri-for(
    controller => 'blog',
    action     => 'show_date',
    year       => 2006,
    month      => 10,
    day        => 5,
);

DESCRIPTION

This module provides a way of deconstructing paths into parameters suitable for dispatching on. It also provides the inverse in that it will take a list of parameters, and construct an appropriate uri for it.

Reversable

This module places a high degree of importance on reversability. The value produced by a path match can be passed back in and you will get the same path you originally put in. The result of this is that it removes ambiguity and therefore reduces the number of possible mis-routings.

Verifyable

This module also provides additional tools you can use to test and verify the integrity of your router. These include:

Methods

method add-route

method add-route(Str $path, *%options)

Adds a new route to the end of the routes list.

method insert-route

method insert-route(Str $path, *%options)

Adds a new route to the routes list. You may specify an at parameter, which would indicate the position where you want to insert your newly created route. The at parameter is the index position in the list, so it starts at 0.

Examples:

# You have more than three paths, insert a new route at
# the 4th item
$router->insert_route($path => (
    at => 3, %options
));

# If you have less items than the index, then it's the same as
# as add_route -- it's just appended to the end of the list
$router->insert_route($path => (
    at => 1_000_000, %options
));

# If you want to prepend, omit "at", or specify 0
$router->insert_Route($path => (
    at => 0, %options
));

method include-router

method include-router (Str $path, Path::Router $other_router)

These extracts all the route from $other_router and includes them into the invocant router and prepends $path to all their paths.

It should be noted that this does not do any kind of redispatch to the $other_router, it actually extracts all the paths from $other_router and inserts them into the invocant router. This means any changes to $other_router after inclusion will not be reflected in the invocant.

has $.routes

method match

method match(Str $path)

Return a Path::Router::Route::Match object for the first route that matches the given $path, or undef if no routes match.

method uri-for

method uri-for(*%path_descriptor)

Find the path that, when passed to $router->match, would produce the given arguments. Returns the path without any leading /. Returns undef if no routes match.

Debugging

You can turn on the verbose debug logging with the PATH_ROUTER_DEBUG environment variable.

DIAGNOSTIC

X::Path::Router

All path router exceptions inherit from this exception class.

X::Path::Router::AmbiguousMatch::PathMatch

This exception is thrown when a path is found to match two different routes equally well.

X::Path::Router::AmbiguousMatch::ReverseMatch

This exception is thrown when two paths are found to match a given criteria when looking up the uri-for a path

X::Path::Router::BadInclusion

This exception is thrown whenever an attempt is made to include one router in another incorrectly.

X::Path::Router::BadRoute

This exception is thrown when a route has some serious flaw, such as a validation for a variable that is not found in the path.

BUG

All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT.

AUTHOR

Andrew Sterling Hanenkamp lthanenkamp@cpan.orggt

Based very closely on the original Perl 5 version by Stevan Little ltstevan.little@iinteractive.comgt

COPYRIGHT

Copyright 2015 Andrew Sterling Hanenkamp.

LICENSE

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.