diff options
Diffstat (limited to 'actionpack/lib/action_controller/routing/route.rb')
| -rw-r--r-- | actionpack/lib/action_controller/routing/route.rb | 300 |
1 files changed, 158 insertions, 142 deletions
diff --git a/actionpack/lib/action_controller/routing/route.rb b/actionpack/lib/action_controller/routing/route.rb index a05c8c10ac..2106ac09e0 100644 --- a/actionpack/lib/action_controller/routing/route.rb +++ b/actionpack/lib/action_controller/routing/route.rb @@ -3,11 +3,25 @@ module ActionController class Route #:nodoc: attr_accessor :segments, :requirements, :conditions, :optimise - def initialize - @segments = [] - @requirements = {} - @conditions = {} - @optimise = true + def initialize(segments = [], requirements = {}, conditions = {}) + @segments = segments + @requirements = requirements + @conditions = conditions + + if !significant_keys.include?(:action) && !requirements[:action] + @requirements[:action] = "index" + @significant_keys << :action + end + + # Routes cannot use the current string interpolation method + # if there are user-supplied <tt>:requirements</tt> as the interpolation + # code won't raise RoutingErrors when generating + has_requirements = @segments.detect { |segment| segment.respond_to?(:regexp) && segment.regexp } + if has_requirements || @requirements.keys.to_set != Routing::ALLOWED_REQUIREMENTS_FOR_OPTIMISATION + @optimise = false + else + @optimise = true + end end # Indicates whether the routes should be optimised with the string interpolation @@ -22,129 +36,6 @@ module ActionController end.compact end - # Write and compile a +generate+ method for this Route. - def write_generation - # Build the main body of the generation - body = "expired = false\n#{generation_extraction}\n#{generation_structure}" - - # If we have conditions that must be tested first, nest the body inside an if - body = "if #{generation_requirements}\n#{body}\nend" if generation_requirements - args = "options, hash, expire_on = {}" - - # Nest the body inside of a def block, and then compile it. - raw_method = method_decl = "def generate_raw(#{args})\npath = begin\n#{body}\nend\n[path, hash]\nend" - instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" - - # expire_on.keys == recall.keys; in other words, the keys in the expire_on hash - # are the same as the keys that were recalled from the previous request. Thus, - # we can use the expire_on.keys to determine which keys ought to be used to build - # the query string. (Never use keys from the recalled request when building the - # query string.) - - method_decl = "def generate(#{args})\npath, hash = generate_raw(options, hash, expire_on)\nappend_query_string(path, hash, extra_keys(options))\nend" - instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" - - method_decl = "def generate_extras(#{args})\npath, hash = generate_raw(options, hash, expire_on)\n[path, extra_keys(options)]\nend" - instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" - raw_method - end - - # Build several lines of code that extract values from the options hash. If any - # of the values are missing or rejected then a return will be executed. - def generation_extraction - segments.collect do |segment| - segment.extraction_code - end.compact * "\n" - end - - # Produce a condition expression that will check the requirements of this route - # upon generation. - def generation_requirements - requirement_conditions = requirements.collect do |key, req| - if req.is_a? Regexp - value_regexp = Regexp.new "\\A#{req.to_s}\\Z" - "hash[:#{key}] && #{value_regexp.inspect} =~ options[:#{key}]" - else - "hash[:#{key}] == #{req.inspect}" - end - end - requirement_conditions * ' && ' unless requirement_conditions.empty? - end - - def generation_structure - segments.last.string_structure segments[0..-2] - end - - # Write and compile a +recognize+ method for this Route. - def write_recognition - # Create an if structure to extract the params from a match if it occurs. - body = "params = parameter_shell.dup\n#{recognition_extraction * "\n"}\nparams" - body = "if #{recognition_conditions.join(" && ")}\n#{body}\nend" - - # Build the method declaration and compile it - method_decl = "def recognize(path, env={})\n#{body}\nend" - instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" - method_decl - end - - # Plugins may override this method to add other conditions, like checks on - # host, subdomain, and so forth. Note that changes here only affect route - # recognition, not generation. - def recognition_conditions - result = ["(match = #{Regexp.new(recognition_pattern).inspect}.match(path))"] - result << "conditions[:method] === env[:method]" if conditions[:method] - result - end - - # Build the regular expression pattern that will match this route. - def recognition_pattern(wrap = true) - pattern = '' - segments.reverse_each do |segment| - pattern = segment.build_pattern pattern - end - wrap ? ("\\A" + pattern + "\\Z") : pattern - end - - # Write the code to extract the parameters from a matched route. - def recognition_extraction - next_capture = 1 - extraction = segments.collect do |segment| - x = segment.match_extraction(next_capture) - next_capture += Regexp.new(segment.regexp_chunk).number_of_captures - x - end - extraction.compact - end - - # Write the real generation implementation and then resend the message. - def generate(options, hash, expire_on = {}) - write_generation - generate options, hash, expire_on - end - - def generate_extras(options, hash, expire_on = {}) - write_generation - generate_extras options, hash, expire_on - end - - # Generate the query string with any extra keys in the hash and append - # it to the given path, returning the new path. - def append_query_string(path, hash, query_keys=nil) - return nil unless path - query_keys ||= extra_keys(hash) - "#{path}#{build_query_string(hash, query_keys)}" - end - - # Determine which keys in the given hash are "extra". Extra keys are - # those that were not used to generate a particular route. The extra - # keys also do not include those recalled from the prior request, nor - # do they include any keys that were implied in the route (like a - # <tt>:controller</tt> that is required, but not explicitly used in the - # text of the route.) - def extra_keys(hash, recall={}) - (hash || {}).keys.map { |k| k.to_sym } - (recall || {}).keys - significant_keys - end - # Build a query string from the keys of the given hash. If +only_keys+ # is given (as an array), only the keys indicated will be used to build # the query string. The query string will correctly build array parameter @@ -161,12 +52,6 @@ module ActionController elements.empty? ? '' : "?#{elements.sort * '&'}" end - # Write the real recognition implementation and then resend the message. - def recognize(path, environment={}) - write_recognition - recognize path, environment - end - # A route's parameter shell contains parameter values that are not in the # route's path, but should be placed in the recognized hash. # @@ -186,7 +71,7 @@ module ActionController # includes keys that appear inside the path, and keys that have requirements # placed upon them. def significant_keys - @significant_keys ||= returning [] do |sk| + @significant_keys ||= returning([]) do |sk| segments.each { |segment| sk << segment.key if segment.respond_to? :key } sk.concat requirements.keys sk.uniq! @@ -209,12 +94,7 @@ module ActionController end def matches_controller_and_action?(controller, action) - unless defined? @matching_prepared - @controller_requirement = requirement_for(:controller) - @action_requirement = requirement_for(:action) - @matching_prepared = true - end - + prepare_matching! (@controller_requirement.nil? || @controller_requirement === controller) && (@action_requirement.nil? || @action_requirement === action) end @@ -226,7 +106,23 @@ module ActionController end end - protected + # TODO: Route should be prepared and frozen on initialize + def freeze + unless frozen? + write_generation! + write_recognition! + prepare_matching! + + parameter_shell + significant_keys + defaults + to_s + end + + super + end + + private def requirement_for(key) return requirements[key] if requirements.key? key segments.each do |segment| @@ -234,6 +130,126 @@ module ActionController end nil end + + # Write and compile a +generate+ method for this Route. + def write_generation! + # Build the main body of the generation + body = "expired = false\n#{generation_extraction}\n#{generation_structure}" + + # If we have conditions that must be tested first, nest the body inside an if + body = "if #{generation_requirements}\n#{body}\nend" if generation_requirements + args = "options, hash, expire_on = {}" + + # Nest the body inside of a def block, and then compile it. + raw_method = method_decl = "def generate_raw(#{args})\npath = begin\n#{body}\nend\n[path, hash]\nend" + instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" + + # expire_on.keys == recall.keys; in other words, the keys in the expire_on hash + # are the same as the keys that were recalled from the previous request. Thus, + # we can use the expire_on.keys to determine which keys ought to be used to build + # the query string. (Never use keys from the recalled request when building the + # query string.) + + method_decl = "def generate(#{args})\npath, hash = generate_raw(options, hash, expire_on)\nappend_query_string(path, hash, extra_keys(options))\nend" + instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" + + method_decl = "def generate_extras(#{args})\npath, hash = generate_raw(options, hash, expire_on)\n[path, extra_keys(options)]\nend" + instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" + raw_method + end + + # Build several lines of code that extract values from the options hash. If any + # of the values are missing or rejected then a return will be executed. + def generation_extraction + segments.collect do |segment| + segment.extraction_code + end.compact * "\n" + end + + # Produce a condition expression that will check the requirements of this route + # upon generation. + def generation_requirements + requirement_conditions = requirements.collect do |key, req| + if req.is_a? Regexp + value_regexp = Regexp.new "\\A#{req.to_s}\\Z" + "hash[:#{key}] && #{value_regexp.inspect} =~ options[:#{key}]" + else + "hash[:#{key}] == #{req.inspect}" + end + end + requirement_conditions * ' && ' unless requirement_conditions.empty? + end + + def generation_structure + segments.last.string_structure segments[0..-2] + end + + # Write and compile a +recognize+ method for this Route. + def write_recognition! + # Create an if structure to extract the params from a match if it occurs. + body = "params = parameter_shell.dup\n#{recognition_extraction * "\n"}\nparams" + body = "if #{recognition_conditions.join(" && ")}\n#{body}\nend" + + # Build the method declaration and compile it + method_decl = "def recognize(path, env = {})\n#{body}\nend" + instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})" + method_decl + end + + # Plugins may override this method to add other conditions, like checks on + # host, subdomain, and so forth. Note that changes here only affect route + # recognition, not generation. + def recognition_conditions + result = ["(match = #{Regexp.new(recognition_pattern).inspect}.match(path))"] + result << "conditions[:method] === env[:method]" if conditions[:method] + result + end + + # Build the regular expression pattern that will match this route. + def recognition_pattern(wrap = true) + pattern = '' + segments.reverse_each do |segment| + pattern = segment.build_pattern pattern + end + wrap ? ("\\A" + pattern + "\\Z") : pattern + end + + # Write the code to extract the parameters from a matched route. + def recognition_extraction + next_capture = 1 + extraction = segments.collect do |segment| + x = segment.match_extraction(next_capture) + next_capture += Regexp.new(segment.regexp_chunk).number_of_captures + x + end + extraction.compact + end + + # Generate the query string with any extra keys in the hash and append + # it to the given path, returning the new path. + def append_query_string(path, hash, query_keys = nil) + return nil unless path + query_keys ||= extra_keys(hash) + "#{path}#{build_query_string(hash, query_keys)}" + end + + # Determine which keys in the given hash are "extra". Extra keys are + # those that were not used to generate a particular route. The extra + # keys also do not include those recalled from the prior request, nor + # do they include any keys that were implied in the route (like a + # <tt>:controller</tt> that is required, but not explicitly used in the + # text of the route.) + def extra_keys(hash, recall = {}) + (hash || {}).keys.map { |k| k.to_sym } - (recall || {}).keys - significant_keys + end + + def prepare_matching! + unless defined? @matching_prepared + @controller_requirement = requirement_for(:controller) + @action_requirement = requirement_for(:action) + @matching_prepared = true + end + end end end end |