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require 'active_support/core_ext/hash/except'
module ActionController
# 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(router, options = {})
options[:host] ||= @request.host_with_port
options[:protocol] ||= @request.protocol
self.class.rewrite(router, options, @request.symbolized_path_parameters) do |options|
process_path_options(options)
end
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
# ROUTES TODO: Class method code smell
def self.rewrite(router, options, path_segments=nil)
handle_positional_args(options)
rewritten_url = ""
# ROUTES TODO: Fix the tests
segments = options.delete(:_path_segments)
relative_url_root = options.delete(:relative_url_root).to_s
path_segments = path_segments ? path_segments.merge(segments || {}) : segments
unless options[:only_path]
rewritten_url << (options[:protocol] || "http")
rewritten_url << "://" unless rewritten_url.match("://")
rewritten_url << rewrite_authentication(options)
raise "Missing host to link to! Please provide :host parameter or set default_url_options[:host]" unless options[:host]
rewritten_url << options[:host]
rewritten_url << ":#{options.delete(:port)}" if options.key?(:port)
end
path_options = options.except(*RESERVED_OPTIONS)
path_options = yield(path_options) if block_given?
path = router.generate(path_options, path_segments || {})
# ROUTES TODO: This can be called directly, so relative_url_root should probably be set in the router
rewritten_url << relative_url_root
rewritten_url << (options[:trailing_slash] ? path.sub(/\?|\z/) { "/" + $& } : path)
rewritten_url << "##{Rack::Utils.escape(options[:anchor].to_param.to_s)}" if options[:anchor]
rewritten_url
end
protected
def self.handle_positional_args(options)
return unless args = options.delete(:_positional_args)
keys = options.delete(:_positional_keys)
keys -= options.keys if args.size < keys.size - 1 # take format into account
args = args.zip(keys).inject({}) do |h, (v, k)|
h[k] = v
h
end
# Tell url_for to skip default_url_options
options.merge!(args)
end
def self.rewrite_authentication(options)
if options[:user] && options[:password]
"#{Rack::Utils.escape(options.delete(:user))}:#{Rack::Utils.escape(options.delete(:password))}@"
else
""
end
end
# Given a Hash of options, generates a route
def process_path_options(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
options
end
end
end
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