started work on message bus diags

config/initializers/message_bus.rb

@@ -3,12 +3,7 @@ MessageBus.site_id_lookup do
 end
 
 MessageBus.user_id_lookup do |env|
-  request = Rack::Request.new(env)
-  auth_token = request.cookies["_t"]
-  user = nil
-  if auth_token && auth_token.length == 32
-    user = User.where(auth_token: auth_token).first 
-  end
+  user = CurrentUser.lookup_from_env(env)
   user.id if user
 end
 
@@ -25,3 +20,14 @@ MessageBus.redis_config = YAML::load(File.open("#{Rails.root}/config/redis.yml")
 
 MessageBus.long_polling_enabled = SiteSetting.enable_long_polling
 MessageBus.long_polling_interval = SiteSetting.long_polling_interval
+
+MessageBus.is_admin_lookup do |env| 
+  user = CurrentUser.lookup_from_env(env)
+  if user && user.admin
+    true
+  else
+    false
+  end
+end
+
+MessageBus.cache_assets = !Rails.env.development?

lib/current_user.rb

@@ -1,5 +1,16 @@
 module CurrentUser
 
+  def self.lookup_from_env(env)
+    request = Rack::Request.new(env)
+    auth_token = request.cookies["_t"]
+    user = nil
+    if auth_token && auth_token.length == 32
+      user = User.where(auth_token: auth_token).first 
+    end
+    
+    return user
+  end
+
   def current_user
     return @current_user if @current_user || @not_logged_in
 

vendor/gems/message_bus/assets/application.handlebars

@@ -0,0 +1,7 @@
+<header>
+  <h2>Message Bus Diagnostics<h2>
+</header>
+
+<div>
+  {{outlet}}
+</div>

vendor/gems/message_bus/assets/application.js

@@ -0,0 +1,48 @@
+
+
+window.App = Ember.Application.createWithMixins({
+  start: function(){
+    MessageBus.start();
+  }
+});
+
+window.App.start();
+
+App.IndexRoute = Ember.Route.extend({
+  setupController: function(controller) {
+    controller.set('content', App.IndexModel.create());
+  }
+});
+
+App.IndexView = Ember.View.extend({
+  
+});
+
+App.IndexModel = Ember.Object.extend({
+  disabled: function(){
+    return this.get("discovering") ? "disabled" : null;
+  }.property("discovering"),
+
+  discover: function(){
+    var _this = this;
+
+    this.set("discovering", true);
+    Ember.run.later(function(){
+      _this.set("discovering", false);
+    }, 20 * 1000);
+
+    $.post("/message-bus/_diagnostics/discover");
+
+    MessageBus.subscribe("/process-discovery", function(data){
+      console.log(data);
+    });
+     
+  }
+});
+
+
+App.IndexController = Ember.ObjectController.extend({
+  discover: function(){
+    this.get("content").discover();
+  }
+});

vendor/gems/message_bus/assets/index.handlebars

@@ -0,0 +1 @@
+<button {{action discover}} {{bindAttr disabled="disabled"}}>Discover Processes</button> 

vendor/gems/message_bus/assets/message-bus.js

@@ -0,0 +1,136 @@
+window.MessageBus = (function() {
+  var callbacks, clientId, failCount, interval, isHidden, queue, responseCallbacks, uniqueId;
+  uniqueId = function() {
+    return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
+      var r, v;
+      r = Math.random() * 16 | 0;
+      v = c === 'x' ? r : r & 0x3 | 0x8;
+      return v.toString(16);
+    });
+  };
+
+  clientId = uniqueId();
+  responseCallbacks = {};
+  callbacks = [];
+  queue = [];
+  interval = null;
+  failCount = 0;
+
+  isHidden = function() {
+    if (document.hidden !== void 0) {
+      return document.hidden;
+    } else if (document.webkitHidden !== void 0) {
+      return document.webkitHidden;
+    } else if (document.msHidden !== void 0) {
+      return document.msHidden;
+    } else if (document.mozHidden !== void 0) {
+      return document.mozHidden;
+    } else {
+      return !document.hasFocus;
+    }
+  };
+
+  return {
+
+    enableLongPolling: true,
+    callbackInterval: 60000,
+    maxPollInterval: 3 * 60 * 1000,
+    callbacks: callbacks,
+    clientId: clientId,
+    stop: false,
+    
+    start: function(opts) {
+      var poll,
+        _this = this;
+      if (opts == null) {
+        opts = {};
+      }
+      poll = function() {
+        var data, gotData;
+        if (callbacks.length === 0) {
+          setTimeout(poll, 500);
+          return;
+        }
+        data = {};
+        callbacks.each(function(c) {
+          return data[c.channel] = c.last_id === void 0 ? -1 : c.last_id;
+        });
+        gotData = false;
+        return _this.longPoll = $.ajax("/message-bus/" + clientId + "/poll?" + (isHidden() || !_this.enableLongPolling ? "dlp=t" : ""), {
+          data: data,
+          cache: false,
+          dataType: 'json',
+          type: 'POST',
+          headers: {
+            'X-SILENCE-LOGGER': 'true'
+          },
+          success: function(messages) {
+            failCount = 0;
+            return messages.each(function(message) {
+              gotData = true;
+              return callbacks.each(function(callback) {
+                if (callback.channel === message.channel) {
+                  callback.last_id = message.message_id;
+                  callback.func(message.data);
+                }
+                if (message["channel"] === "/__status") {
+                  if (message.data[callback.channel] !== void 0) {
+                    callback.last_id = message.data[callback.channel];
+                  }
+                }
+              });
+            });
+          },
+          error: failCount += 1,
+          complete: function() {
+            if (gotData) {
+              setTimeout(poll, 100);
+            } else {
+              interval = _this.callbackInterval;
+              if (failCount > 2) {
+                interval = interval * failCount;
+              } else if (isHidden()) {
+                interval = interval * 4;
+              }
+              if (interval > _this.maxPollInterval) {
+                interval = _this.maxPollInterval;
+              }
+              setTimeout(poll, interval);
+            }
+            _this.longPoll = null;
+          }
+        });
+      };
+      poll();
+    },
+
+    subscribe: function(channel, func, lastId) {
+      callbacks.push({
+        channel: channel,
+        func: func,
+        last_id: lastId
+      });
+      if (this.longPoll) {
+        return this.longPoll.abort();
+      }
+    },
+
+    unsubscribe: function(channel) {
+      var glob;
+      if (channel.endsWith("*")) {
+        channel = channel.substr(0, channel.length - 1);
+        glob = true;
+      }
+      callbacks = callbacks.filter(function(callback) {
+        if (glob) {
+          return callback.channel.substr(0, channel.length) !== channel;
+        } else {
+          return callback.channel !== channel;
+        }
+      });
+      if (this.longPoll) {
+        return this.longPoll.abort();
+      }
+    }
+  };
+})();

vendor/gems/message_bus/lib/message_bus.rb

@@ -20,6 +20,18 @@ end
 module MessageBus; end
 module MessageBus::Implementation
 
+  def cache_assets=(val)
+    @cache_assets = val
+  end
+
+  def cache_assets
+    if defined? @cache_assets
+      @cache_assets
+    else
+      true
+    end
+  end
+
   def logger=(logger)
     @logger = logger
   end

vendor/gems/message_bus/lib/message_bus/rack/diagnostics.rb

@@ -5,31 +5,86 @@ class MessageBus::Rack::Diagnostics
     @app = app
   end
 
+  def js_asset(name)
+    return generate_script_tag(name) unless MessageBus.cache_assets
+    @@asset_cache ||= {}
+    @@asset_cache[name] ||= generate_script_tag(name)
+    @@asset_cache[name]
+  end
+
+  def  generate_script_tag(name)
+    "<script src='/message-bus/_diagnostics/assets/#{name}?#{file_hash(name)}' type='text/javascript'></script>"
+  end
+
+  def file_hash(asset)
+    require 'digest/sha1'
+    Digest::SHA1.hexdigest(asset_contents(asset))
+  end
+
+  def asset_contents(asset)
+    File.open(asset_path(asset)).read
+  end
+
+  def asset_path(asset)
+    File.expand_path("../../../../assets/#{asset}", __FILE__)
+  end
+
   def index
     html = <<HTML
 <!DOCTYPE html>
 <html>
-  <head></head>
+  <head>
+  </head>
   <body>
-    <h2>Message Bus Diags</h2>
+    <div id="app"></div>
+    #{js_asset "jquery-1.8.2.js"}
+    #{js_asset "handlebars-1.0.rc.2.js"}
+    #{js_asset "ember.js"}
+    #{js_asset "message-bus.js"}
+    #{js_asset "application.handlebars"}
+    #{js_asset "index.handlebars"}
+    #{js_asset "application.js"}
   </body>
 </html>
 HTML
-    return [200, {"content-type" => "text/html;"}, html]
+    return [200, {"content-type" => "text/html;"}, [html]]
+  end
+
+  def translate_handlebars(name, content)
+    "Ember.TEMPLATES['#{name}'] = Ember.Handlebars.compile(#{indent(content).inspect});"
+  end
+
+  # from ember-rails
+  def indent(string)
+    string.gsub(/$(.)/m, "\\1  ").strip
   end 
 
   def call(env)
 
     return @app.call(env) unless env['PATH_INFO'].start_with? '/message-bus/_diagnostics'
 
-    route = env['PATH_INFO'].split('/message_bus/_diagnostics')[1]
+    route = env['PATH_INFO'].split('/message-bus/_diagnostics')[1]
     
-    if MessageBus.is_admin_lookup.nil? || !MessageBus.is_admin_lookup.call
-      return [403, {}, ["not allowed"]]
+    if MessageBus.is_admin_lookup.nil? || !MessageBus.is_admin_lookup.call(env)
+      return [403, {}, ['not allowed']]
     end
 
     return index unless route
 
-    return [404, {}, ["not found"]]
+    if route == 'discover'
+      MessageBus.publish('/discover', {user_id: MessageBus() })
+    end
+
+    asset = route.split('/assets/')[1]
+    if asset && !asset !~ /\//
+      content = asset_contents(asset) 
+      split = asset.split('.')
+      if split[1] == 'handlebars'
+        content = translate_handlebars(split[0],content)
+      end
+      return [200, {'content-type' => 'text/javascript;'}, [content]]
+    end
+    
+    return [404, {}, ['not found']]
   end
 end

vendor/gems/message_bus/spec/lib/middleware_spec.rb

@@ -122,6 +122,14 @@ describe MessageBus::Rack::Middleware do
       get "/message-bus/_diagnostics"
       last_response.status.should == 200
     end
+
+    it "should get the script it asks for" do
+      MessageBus.stub(:is_admin_lookup).and_return(lambda{ true })
+      get "/message-bus/_diagnostics/assets/message-bus.js"
+      last_response.status.should == 200
+      last_response.content_type.should == "text/javascript;"
+    end
+
   end
   
   describe "polling" do