Make 404 page somewhat prettier.

src/__celerity_resource_map__.php

@@ -34,6 +34,15 @@ celerity_register_resource_map(array(
     ),
     'disk' => '/rsrc/css/aphront/panel-view.css',
   ),
+  'aphront-request-failure-view-css' =>
+  array(
+    'uri' => '/res/d7df3b42/rsrc/css/aphront/request-failure-view.css',
+    'type' => 'css',
+    'requires' =>
+    array(
+    ),
+    'disk' => '/rsrc/css/aphront/request-failure-view.css',
+  ),
   'aphront-side-nav-view-css' =>
   array(
     'uri' => '/res/0fc0545c/rsrc/css/aphront/side-nav-view.css',

src/__phutil_library_map__.php

@@ -45,6 +45,7 @@ phutil_register_library_map(array(
     'AphrontRedirectException' => 'aphront/exception/redirect',
     'AphrontRedirectResponse' => 'aphront/response/redirect',
     'AphrontRequest' => 'aphront/request',
+    'AphrontRequestFailureView' => 'view/page/failure',
     'AphrontResponse' => 'aphront/response/base',
     'AphrontSideNavView' => 'view/layout/sidenav',
     'AphrontTableView' => 'view/control/table',
@@ -210,6 +211,7 @@ phutil_register_library_map(array(
     'AphrontQueryRecoverableException' => 'AphrontQueryException',
     'AphrontRedirectException' => 'AphrontException',
     'AphrontRedirectResponse' => 'AphrontResponse',
+    'AphrontRequestFailureView' => 'AphrontView',
     'AphrontSideNavView' => 'AphrontView',
     'AphrontTableView' => 'AphrontView',
     'AphrontWebpageResponse' => 'AphrontResponse',

src/aphront/default/configuration/AphrontDefaultApplicationConfiguration.php

@@ -151,10 +151,16 @@ class AphrontDefaultApplicationConfiguration
         return $response;
       }
     } else if ($response instanceof Aphront404Response) {
+
+      $failure = new AphrontRequestFailureView();
+      $failure->setHeader('404 Not Found');
+      $failure->appendChild(
+        '<p>The page you requested was not found.</p>');
+
       $view = new PhabricatorStandardPageView();
-      $view->appendChild('404 Not Found');
       $view->setTitle('404 Not Found');
-      
+      $view->appendChild($failure);
+
       $response = new AphrontWebpageResponse();
       $response->setContent($view->render());
       $response->setHTTPResponseCode(404);

src/aphront/default/configuration/__init__.php

@@ -10,6 +10,7 @@ phutil_require_module('phabricator', 'aphront/applicationconfiguration');
 phutil_require_module('phabricator', 'aphront/request');
 phutil_require_module('phabricator', 'aphront/response/webpage');
 phutil_require_module('phabricator', 'applications/base/controller/404');
+phutil_require_module('phabricator', 'view/page/failure');
 phutil_require_module('phabricator', 'view/page/standard');
 
 phutil_require_module('phutil', 'markup');

src/aphront/response/base/AphrontResponse.php

@@ -37,17 +37,17 @@ abstract class AphrontResponse {
   public function getHeaders() {
     return array();
   }
-  
+
   public function setCacheDurationInSeconds($duration) {
     $this->cacheable = $duration;
     return $this;
   }
-  
+
   public function setHTTPResponseCode($code) {
     $this->responseCode = $code;
     return $this;
   }
-  
+
   public function getHTTPResponseCode() {
     return $this->responseCode;
   }

src/view/page/failure/AphrontRequestFailureView.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class AphrontRequestFailureView extends AphrontView {
+
+  private $header;
+
+  public function setHeader($header) {
+    $this->header = $header;
+    return $this;
+  }
+
+
+  final public function render() {
+    require_celerity_resource('aphront-request-failure-view-css');
+    
+    return
+      '<div class="aphront-request-failure-view">'.
+        '<div class="aphront-request-failure-head">'.
+          '<h1>'.phutil_escape_html($this->header).'</h1>'.
+        '</div>'.
+        '<div class="aphront-request-failure-body">'.
+          $this->renderChildren().
+        '</div>'.
+      '</div>';
+  }
+
+}

src/view/page/failure/__init__.php

@@ -0,0 +1,14 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'view/base');
+
+phutil_require_module('phutil', 'markup');
+
+
+phutil_require_source('AphrontRequestFailureView.php');

webroot/rsrc/css/aphront/request-failure-view.css

@@ -0,0 +1,27 @@
+/**
+ * @provides aphront-request-failure-view-css
+ */
+
+.aphront-request-failure-view {
+  margin: 2em auto;
+  background: #eff2f7;
+  width: 600px;
+}
+
+.aphront-request-failure-view .aphront-request-failure-head {
+  padding: 1em 2em;
+  border-bottom: 1px solid #afb2b7;
+  background: #dfe2e7;
+}
+
+.aphront-request-failure-view .aphront-request-failure-head h1 {
+  font-size: 24px;
+}
+
+.aphront-request-failure-view .aphront-request-failure-body {
+  padding: 1em 2em;
+}
+
+.aphront-request-failure-view .aphront-request-failure-body p {
+  margin: .5em 0 1.25em;
+}