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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 <tt>:host</tt>
# pair is provided.
mattr_accessor :default_url_options
self.default_url_options = {}
def self.included(base) #:nodoc:
ActionController::Routing::Routes.install_helpers(base)
base.mattr_accessor :default_url_options
base.default_url_options ||= default_url_options
end
# Generate a url based on the options provided, default_url_options and the
# routes defined in routes.rb. The following options are supported:
#
# * <tt>:only_path</tt> - If true, the relative url is returned. Defaults to +false+.
# * <tt>:protocol</tt> - The protocol to connect to. Defaults to 'http'.
# * <tt>:host</tt> - Specifies the host the link should be targetted at.
# If <tt>:only_path</tt> is false, this option must be
# provided either explicitly, or via +default_url_options+.
# * <tt>:port</tt> - Optionally specify the port to connect to.
# * <tt>:anchor</tt> - An anchor name to be appended to the path.
# * <tt>:skip_relative_url_root</tt> - If true, the url is not constructed using the
# +relative_url_root+ set in ActionController::AbstractRequest.relative_url_root.
# * <tt>:trailing_slash</tt> - If true, adds a trailing slash, as in "/archive/2009/"
#
# Any other key (<tt>:controller</tt>, <tt>:action</tt>, etc.) given to
# +url_for+ is forwarded to the Routes module.
#
# Examples:
#
# url_for :controller => 'tasks', :action => 'testing', :host=>'somehost.org', :port=>'8080' # => 'http://somehost.org:8080/tasks/testing'
# url_for :controller => 'tasks', :action => 'testing', :host=>'somehost.org', :anchor => 'ok', :only_path => true # => '/tasks/testing#ok'
# url_for :controller => 'tasks', :action => 'testing', :trailing_slash=>true # => 'http://somehost.org/tasks/testing/'
# url_for :controller => 'tasks', :action => 'testing', :host=>'somehost.org', :number => '33' # => 'http://somehost.org/tasks/testing?number=33'
def url_for(options)
options = self.class.default_url_options.merge(options)
url = ''
unless options.delete(:only_path)
url << (options.delete(:protocol) || 'http')
url << '://' unless url.match("://")
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, :skip_relative_url_root].each { |k| options.delete(k) }
end
trailing_slash = options.delete(:trailing_slash) if options.key?(:trailing_slash)
url << ActionController::AbstractRequest.relative_url_root.to_s unless options[:skip_relative_url_root]
anchor = "##{CGI.escape options.delete(:anchor).to_param.to_s}" if options[:anchor]
generated = Routing::Routes.generate(options, {})
url << (trailing_slash ? generated.sub(/\?|\z/) { "/" + $& } : generated)
url << anchor if anchor
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, :port, :trailing_slash, :skip_relative_url_root]
def initialize(request, parameters)
@request, @parameters = request, parameters
end
def rewrite(options = {})
rewrite_url(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
# Given a path and options, returns a rewritten URL string
def rewrite_url(options)
rewritten_url = ""
unless options[:only_path]
rewritten_url << (options[:protocol] || @request.protocol)
rewritten_url << "://" unless rewritten_url.match("://")
rewritten_url << rewrite_authentication(options)
rewritten_url << (options[:host] || @request.host_with_port)
rewritten_url << ":#{options.delete(:port)}" if options.key?(:port)
end
path = rewrite_path(options)
rewritten_url << @request.relative_url_root.to_s unless options[:skip_relative_url_root]
rewritten_url << (options[:trailing_slash] ? path.sub(/\?|\z/) { "/" + $& } : path)
rewritten_url << "##{options[:anchor]}" if options[:anchor]
rewritten_url
end
# Given a Hash of options, generates a route
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.symbolize_keys)
end
RESERVED_OPTIONS.each { |k| options.delete(k) }
# Generates the query string, too
Routing::Routes.generate(options, @request.symbolized_path_parameters)
end
def rewrite_authentication(options)
if options[:user] && options[:password]
"#{CGI.escape(options.delete(:user))}:#{CGI.escape(options.delete(:password))}@"
else
""
end
end
end
end
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