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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, :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)
options.update(overwrite)
end
RESERVED_OPTIONS.each {|k| options.delete k}
path, extra_keys = Routing::Routes.generate(options.dup, @request) # Warning: Routes will mutate and violate the options hash
path << build_query_string(options, extra_keys) unless extra_keys.empty?
path
end
# Returns a query string with escaped keys and values from the passed hash. If the passed hash contains an "id" it'll
# be added as a path element instead of a regular parameter pair.
def build_query_string(hash, only_keys = nil)
elements = []
query_string = ""
only_keys ||= hash.keys
only_keys.each do |key|
value = hash[key]
key = CGI.escape key.to_s
if value.class == Array
key << '[]'
else
value = [ value ]
end
value.each { |val| elements << "#{key}=#{Routing.extract_parameter_value(val)}" }
end
query_string << ("?" + elements.join("&")) unless elements.empty?
query_string
end
end
end
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