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module ActionController
# Write URLs from arbitrary places in your codebase, such as your mailers.
#
# Example:
#
# class MyMailer
# include ActionController::UrlWriter
# default_url_options[:host] = 'www.basecamphq.com'
#
# def signup_url(token)
# url_for(:controller => 'signup', action => 'index', :token => token)
# end
# end
#
# In addition to providing +url_for+, named routes are also accessible after
# including UrlWriter.
#
module UrlWriter
# The default options for urls written by this writer. Typically a :host pair
# is provided.
mattr_accessor :default_url_options
self.default_url_options = {}
def self.included(base) #:nodoc:
ActionController::Routing::Routes.named_routes.install base
base.mattr_accessor :default_url_options
base.default_url_options ||= default_url_options
end
# Generate a url with the provided options. The following special options may
# effect the constructed url:
#
# * :host Specifies the host the link should be targetted at. This option
# must be provided either explicitly, or via default_url_options.
# * :protocol The protocol to connect to. Defaults to 'http'
# * :port Optionally specify the port to connect to.
#
def url_for(options)
options = self.class.default_url_options.merge(options)
url = ''
unless options.delete :only_path
url << (options.delete(:protocol) || 'http')
url << '://'
raise "Missing host to link to! Please provide :host parameter or set default_url_options[:host]" unless options[:host]
url << options.delete(:host)
url << ":#{options.delete(:port)}" if options.key?(:port)
else
# Delete the unused options to prevent their appearance in the query string
[:protocol, :host, :port].each { |k| options.delete k }
end
url << Routing::Routes.generate(options, {})
return url
end
end
# Rewrites URLs for Base.redirect_to and Base.url_for in the controller.
class UrlRewriter #:nodoc:
RESERVED_OPTIONS = [:anchor, :params, :only_path, :host, :protocol, :trailing_slash, :skip_relative_url_root]
def initialize(request, parameters)
@request, @parameters = request, parameters
end
def rewrite(options = {})
rewrite_url(rewrite_path(options), options)
end
def to_str
"#{@request.protocol}, #{@request.host_with_port}, #{@request.path}, #{@parameters[:controller]}, #{@parameters[:action]}, #{@request.parameters.inspect}"
end
alias_method :to_s, :to_str
private
def rewrite_url(path, options)
rewritten_url = ""
unless options[:only_path]
rewritten_url << (options[:protocol] || @request.protocol)
rewritten_url << (options[:host] || @request.host_with_port)
end
rewritten_url << @request.relative_url_root.to_s unless options[:skip_relative_url_root]
rewritten_url << path
rewritten_url << '/' if options[:trailing_slash]
rewritten_url << "##{options[:anchor]}" if options[:anchor]
rewritten_url
end
def rewrite_path(options)
options = options.symbolize_keys
options.update(options[:params].symbolize_keys) if options[:params]
if (overwrite = options.delete(:overwrite_params))
options.update(@parameters.symbolize_keys)
options.update(overwrite)
end
RESERVED_OPTIONS.each {|k| options.delete k}
# Generates the query string, too
Routing::Routes.generate(options, @request.symbolized_path_parameters)
end
end
end
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