From 321db4aa2edf46b8cf54c99bf3b97b48b7099dcf Mon Sep 17 00:00:00 2001
From: brainopia <brainopia@evilmartians.com>
Date: Mon, 23 Feb 2015 19:51:30 +0300
Subject: [PATCH] Change filter on /rails/info/routes to use an actual path
 regexp from rails

Change filter on /rails/info/routes to use an actual path regexp from rails
and not approximate javascript version. Oniguruma supports much more
extensive list of features than javascript regexp engine.

Fixes #18402.
---
 actionpack/CHANGELOG.md                       |   8 ++
 .../templates/routes/_route.html.erb          |   8 +-
 .../templates/routes/_table.html.erb          | 122 +++++++++---------
 .../lib/action_dispatch/routing/inspector.rb  |  26 +---
 .../test/dispatch/routing/inspector_test.rb   |   8 --
 railties/lib/rails/info_controller.rb         |  25 +++-
 railties/test/rails_info_controller_test.rb   |  25 ++++
 7 files changed, 123 insertions(+), 99 deletions(-)

diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 8f36af94b4e89..7659c35eae06f 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -4,6 +4,14 @@
 
     *David Ilizarov*
 
+*   Change filter on /rails/info/routes to use an actual path regexp from rails
+    and not approximate javascript version. Oniguruma supports much more
+    extensive list of features than javascript regexp engine.
+
+    Fixes #18402.
+
+    *Ravil Bayramgalin*
+
 *   Non-string authenticity tokens do not raise NoMethodError when decoding
     the masked token.
 
diff --git a/actionpack/lib/action_dispatch/middleware/templates/routes/_route.html.erb b/actionpack/lib/action_dispatch/middleware/templates/routes/_route.html.erb
index 24e44f31acf9e..6e995c85c16f5 100644
--- a/actionpack/lib/action_dispatch/middleware/templates/routes/_route.html.erb
+++ b/actionpack/lib/action_dispatch/middleware/templates/routes/_route.html.erb
@@ -4,13 +4,13 @@
       <%= route[:name] %><span class='helper'>_path</span>
     <% end %>
   </td>
-  <td data-route-verb='<%= route[:verb] %>'>
+  <td>
     <%= route[:verb] %>
   </td>
-  <td data-route-path='<%= route[:path] %>' data-regexp='<%= route[:regexp] %>'>
+  <td data-route-path='<%= route[:path] %>'>
     <%= route[:path] %>
   </td>
-  <td data-route-reqs='<%= route[:reqs] %>'>
-    <%= route[:reqs] %>
+  <td>
+    <%=simple_format route[:reqs] %>
   </td>
 </tr>
diff --git a/actionpack/lib/action_dispatch/middleware/templates/routes/_table.html.erb b/actionpack/lib/action_dispatch/middleware/templates/routes/_table.html.erb
index 5cee0b59327ff..429ea7057c3cd 100644
--- a/actionpack/lib/action_dispatch/middleware/templates/routes/_table.html.erb
+++ b/actionpack/lib/action_dispatch/middleware/templates/routes/_table.html.erb
@@ -81,92 +81,87 @@
 </table>
 
 <script type='text/javascript'>
-  // Iterates each element through a function
-  function each(elems, func) {
-    if (!elems instanceof Array) { elems = [elems]; }
-    for (var i = 0, len = elems.length; i < len; i++) {
-      func(elems[i]);
-    }
-  }
-
-  // Sets innerHTML for an element
-  function setContent(elem, text) {
-    elem.innerHTML = text;
-  }
+  // support forEarch iterator on NodeList
+  NodeList.prototype.forEach = Array.prototype.forEach;
 
   // Enables path search functionality
   function setupMatchPaths() {
-    // Check if the user input (sanitized as a path) matches the regexp data attribute
-    function checkExactMatch(section, elem, value) {
-      var string = sanitizePath(value),
-          regexp = elem.getAttribute("data-regexp");
-
-      showMatch(string, regexp, section, elem);
+    // Check if there are any matched results in a section
+    function checkNoMatch(section, noMatchText) {
+      if (section.children.length <= 1) {
+        section.innerHTML += noMatchText;
+      }
     }
 
-    // Check if the route path data attribute contains the user input
-    function checkFuzzyMatch(section, elem, value) {
-      var string = elem.getAttribute("data-route-path"),
-          regexp = value;
-
-      showMatch(string, regexp, section, elem);
+    // get JSON from url and invoke callback with result
+    function getJSON(url, success) {
+      var xhr = new XMLHttpRequest();
+      xhr.open('GET', url);
+      xhr.onload = function() {
+        if (this.status == 200)
+          success(JSON.parse(this.response));
+      };
+      xhr.send();
     }
 
-    // Display the parent <tr> element in the appropriate section when there's a match
-    function showMatch(string, regexp, section, elem) {
-      if(string.match(RegExp(regexp))) {
-        section.appendChild(elem.parentNode.cloneNode(true));
+    function delayedKeyup(input, callback) {
+      var timeout;
+      input.onkeyup = function(){
+        if (timeout) clearTimeout(timeout);
+        timeout = setTimeout(callback, 300);
       }
     }
 
-    // Check if there are any matched results in a section
-    function checkNoMatch(section, defaultText, noMatchText) {
-      if (section.innerHTML === defaultText) {
-        setContent(section, defaultText + noMatchText);
-      }
-    }
-
-    // Ensure path always starts with a slash "/" and remove params or fragments
+    // remove params or fragments
     function sanitizePath(path) {
-      var path = path.charAt(0) == '/' ? path : "/" + path;
-      return path.replace(/\#.*|\?.*/, '');
+      return path.replace(/[#?].*/, '');
     }
 
-    var regexpElems     = document.querySelectorAll('#route_table [data-regexp]'),
-        searchElem      = document.querySelector('#search'),
-        exactMatches    = document.querySelector('#exact_matches'),
-        fuzzyMatches    = document.querySelector('#fuzzy_matches');
+    var pathElements = document.querySelectorAll('#route_table [data-route-path]'),
+        searchElem   = document.querySelector('#search'),
+        exactSection = document.querySelector('#exact_matches'),
+        fuzzySection = document.querySelector('#fuzzy_matches');
 
     // Remove matches when no search value is present
     searchElem.onblur = function(e) {
       if (searchElem.value === "") {
-        setContent(exactMatches, "");
-        setContent(fuzzyMatches, "");
+        exactSection.innerHTML = "";
+        fuzzySection.innerHTML = "";
       }
     }
 
     // On key press perform a search for matching paths
-    searchElem.onkeyup = function(e){
-      var userInput         = searchElem.value,
-          defaultExactMatch = '<tr><th colspan="4">Paths Matching (' + escape(sanitizePath(userInput)) +'):</th></tr>',
-          defaultFuzzyMatch = '<tr><th colspan="4">Paths Containing (' + escape(userInput) +'):</th></tr>',
+    delayedKeyup(searchElem, function() {
+      var path = sanitizePath(searchElem.value),
+          defaultExactMatch = '<tr><th colspan="4">Paths Matching (' + path +'):</th></tr>',
+          defaultFuzzyMatch = '<tr><th colspan="4">Paths Containing (' + path +'):</th></tr>',
           noExactMatch      = '<tr><th colspan="4">No Exact Matches Found</th></tr>',
           noFuzzyMatch      = '<tr><th colspan="4">No Fuzzy Matches Found</th></tr>';
 
-      // Clear out results section
-      setContent(exactMatches, defaultExactMatch);
-      setContent(fuzzyMatches, defaultFuzzyMatch);
+      if (!path)
+        return searchElem.onblur();
 
-      // Display exact matches and fuzzy matches
-      each(regexpElems, function(elem) {
-        checkExactMatch(exactMatches, elem, userInput);
-        checkFuzzyMatch(fuzzyMatches, elem, userInput);
-      })
+      getJSON('/rails/info/routes?path=' + path, function(matches){
+        // Clear out results section
+        exactSection.innerHTML = defaultExactMatch;
+        fuzzySection.innerHTML = defaultFuzzyMatch;
 
-      // Display 'No Matches' message when no matches are found
-      checkNoMatch(exactMatches, defaultExactMatch, noExactMatch);
-      checkNoMatch(fuzzyMatches, defaultFuzzyMatch, noFuzzyMatch);
-    }
+        // Display exact matches and fuzzy matches
+        pathElements.forEach(function(elem) {
+          var elemPath = elem.getAttribute('data-route-path');
+
+          if (matches['exact'].indexOf(elemPath) != -1)
+            exactSection.appendChild(elem.parentNode.cloneNode(true));
+
+          if (matches['fuzzy'].indexOf(elemPath) != -1)
+            fuzzySection.appendChild(elem.parentNode.cloneNode(true));
+        })
+
+        // Display 'No Matches' message when no matches are found
+        checkNoMatch(exactSection, noExactMatch);
+        checkNoMatch(fuzzySection, noFuzzyMatch);
+      })
+    })
   }
 
   // Enables functionality to toggle between `_path` and `_url` helper suffixes
@@ -174,19 +169,20 @@
 
     // Sets content for each element
     function setValOn(elems, val) {
-      each(elems, function(elem) {
-        setContent(elem, val);
+      elems.forEach(function(elem) {
+        elem.innerHTML = val;
       });
     }
 
     // Sets onClick event for each element
     function onClick(elems, func) {
-      each(elems, function(elem) {
+      elems.forEach(function(elem) {
         elem.onclick = func;
       });
     }
 
     var toggleLinks = document.querySelectorAll('#route_table [data-route-helper]');
+
     onClick(toggleLinks, function(){
       var helperTxt   = this.getAttribute("data-route-helper"),
           helperElems = document.querySelectorAll('[data-route-name] span.helper');
diff --git a/actionpack/lib/action_dispatch/routing/inspector.rb b/actionpack/lib/action_dispatch/routing/inspector.rb
index df5ebb6751084..c513737fc2f4b 100644
--- a/actionpack/lib/action_dispatch/routing/inspector.rb
+++ b/actionpack/lib/action_dispatch/routing/inspector.rb
@@ -28,23 +28,6 @@ def name
         super.to_s
       end
 
-      def regexp
-        __getobj__.path.to_regexp
-      end
-
-      def json_regexp
-        str = regexp.inspect.
-              sub('\\A' , '^').
-              sub('\\Z' , '$').
-              sub('\\z' , '$').
-              sub(/^\// , '').
-              sub(/\/[a-z]*$/ , '').
-              gsub(/\(\?#.+\)/ , '').
-              gsub(/\(\?-\w+:/ , '(').
-              gsub(/\s/ , '')
-        Regexp.new(str).source
-      end
-
       def reqs
         @reqs ||= begin
           reqs = endpoint
@@ -117,11 +100,10 @@ def collect_routes(routes)
         end.reject(&:internal?).collect do |route|
           collect_engine_routes(route)
 
-          { name:   route.name,
-            verb:   route.verb,
-            path:   route.path,
-            reqs:   route.reqs,
-            regexp: route.json_regexp }
+          { name: route.name,
+            verb: route.verb,
+            path: route.path,
+            reqs: route.reqs }
         end
       end
 
diff --git a/actionpack/test/dispatch/routing/inspector_test.rb b/actionpack/test/dispatch/routing/inspector_test.rb
index 3d3d4b74ae144..3df022c64baf0 100644
--- a/actionpack/test/dispatch/routing/inspector_test.rb
+++ b/actionpack/test/dispatch/routing/inspector_test.rb
@@ -26,14 +26,6 @@ def draw(options = {}, &block)
         inspector.format(ActionDispatch::Routing::ConsoleFormatter.new, options[:filter]).split("\n")
       end
 
-      def test_json_regexp_converter
-        @set.draw do
-          get '/cart', :to => 'cart#show'
-        end
-        route = ActionDispatch::Routing::RouteWrapper.new(@set.routes.first)
-        assert_equal "^\\/cart(?:\\.([^\\/.?]+))?$", route.json_regexp
-      end
-
       def test_displaying_routes_for_engines
         engine = Class.new(Rails::Engine) do
           def self.inspect
diff --git a/railties/lib/rails/info_controller.rb b/railties/lib/rails/info_controller.rb
index 49e5431a160ff..6e61cc3cb52b8 100644
--- a/railties/lib/rails/info_controller.rb
+++ b/railties/lib/rails/info_controller.rb
@@ -17,7 +17,28 @@ def properties
   end
 
   def routes
-    @routes_inspector = ActionDispatch::Routing::RoutesInspector.new(_routes.routes)
-    @page_title = 'Routes'
+    if path = params[:path]
+      path = URI.escape path
+      normalized_path = with_leading_slash path
+      render json: {
+        exact: match_route {|it| it.match normalized_path },
+        fuzzy: match_route {|it| it.spec.to_s.match path }
+      }
+    else
+      @routes_inspector = ActionDispatch::Routing::RoutesInspector.new(_routes.routes)
+      @page_title = 'Routes'
+    end
+  end
+
+  private
+
+  def match_route
+    _routes.routes.select {|route|
+      yield route.path
+    }.map {|route| route.path.spec.to_s }
+  end
+
+  def with_leading_slash(path)
+    ('/' + path).squeeze('/')
   end
 end
diff --git a/railties/test/rails_info_controller_test.rb b/railties/test/rails_info_controller_test.rb
index 25b0e761cbee1..d87b51d85204b 100644
--- a/railties/test/rails_info_controller_test.rb
+++ b/railties/test/rails_info_controller_test.rb
@@ -53,4 +53,29 @@ def setup
     assert_response :success
   end
 
+  test "info controller returns exact matches" do
+    exact_count = -> { JSON(response.body)['exact'].size }
+
+    get :routes, path: 'rails/info/route'
+    assert exact_count.call == 0, 'should not match incomplete routes'
+
+    get :routes, path: 'rails/info/routes'
+    assert exact_count.call == 1, 'should match complete routes'
+    
+    get :routes, path: 'rails/info/routes.html'
+    assert exact_count.call == 1, 'should match complete routes with optional parts'
+  end
+
+  test "info controller returns fuzzy matches" do
+    fuzzy_count = -> { JSON(response.body)['fuzzy'].size }
+
+    get :routes, path: 'rails/info'
+    assert fuzzy_count.call == 2, 'should match incomplete routes'
+
+    get :routes, path: 'rails/info/routes'
+    assert fuzzy_count.call == 1, 'should match complete routes'
+    
+    get :routes, path: 'rails/info/routes.html'
+    assert fuzzy_count.call == 0, 'should match optional parts of route literally'
+  end
 end