pictcode / lib / Cake / View / JsonView.php @ master
履歴 | 表示 | アノテート | ダウンロード (5.273 KB)
1 | 635eef61 | spyder1211 | <?php
|
---|---|---|---|
2 | /**
|
||
3 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
|
||
4 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
|
||
5 | *
|
||
6 | * Licensed under The MIT License
|
||
7 | * For full copyright and license information, please see the LICENSE.txt
|
||
8 | * Redistributions of files must retain the above copyright notice.
|
||
9 | *
|
||
10 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
|
||
11 | * @link http://cakephp.org CakePHP(tm) Project
|
||
12 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
|
||
13 | */
|
||
14 | |||
15 | App::uses('View', 'View'); |
||
16 | |||
17 | /**
|
||
18 | * A view class that is used for JSON responses.
|
||
19 | *
|
||
20 | * By setting the '_serialize' key in your controller, you can specify a view variable
|
||
21 | * that should be serialized to JSON and used as the response for the request.
|
||
22 | * This allows you to omit views and layouts if you just need to emit a single view
|
||
23 | * variable as the JSON response.
|
||
24 | *
|
||
25 | * In your controller, you could do the following:
|
||
26 | *
|
||
27 | * `$this->set(array('posts' => $posts, '_serialize' => 'posts'));`
|
||
28 | *
|
||
29 | * When the view is rendered, the `$posts` view variable will be serialized
|
||
30 | * into JSON.
|
||
31 | *
|
||
32 | * You can also define `'_serialize'` as an array. This will create a top level object containing
|
||
33 | * all the named view variables:
|
||
34 | *
|
||
35 | * ```
|
||
36 | * $this->set(compact('posts', 'users', 'stuff'));
|
||
37 | * $this->set('_serialize', array('posts', 'users'));
|
||
38 | * ```
|
||
39 | *
|
||
40 | * The above would generate a JSON object that looks like:
|
||
41 | *
|
||
42 | * `{"posts": [...], "users": [...]}`
|
||
43 | *
|
||
44 | * If you don't use the `_serialize` key, you will need a view. You can use extended
|
||
45 | * views to provide layout-like functionality.
|
||
46 | *
|
||
47 | * You can also enable JSONP support by setting parameter `_jsonp` to true or a string to specify
|
||
48 | * custom query string paramater name which will contain the callback function name.
|
||
49 | *
|
||
50 | * @package Cake.View
|
||
51 | * @since CakePHP(tm) v 2.1.0
|
||
52 | */
|
||
53 | class JsonView extends View { |
||
54 | |||
55 | /**
|
||
56 | * JSON views are always located in the 'json' sub directory for
|
||
57 | * controllers' views.
|
||
58 | *
|
||
59 | * @var string
|
||
60 | */
|
||
61 | public $subDir = 'json'; |
||
62 | |||
63 | /**
|
||
64 | * Constructor
|
||
65 | *
|
||
66 | * @param Controller $controller Controller instance.
|
||
67 | */
|
||
68 | public function __construct(Controller $controller = null) { |
||
69 | parent::__construct($controller); |
||
70 | if (isset($controller->response) && $controller->response instanceof CakeResponse) { |
||
71 | $controller->response->type('json'); |
||
72 | } |
||
73 | } |
||
74 | |||
75 | /**
|
||
76 | * Skip loading helpers if this is a _serialize based view.
|
||
77 | *
|
||
78 | * @return void
|
||
79 | */
|
||
80 | public function loadHelpers() { |
||
81 | if (isset($this->viewVars['_serialize'])) { |
||
82 | return;
|
||
83 | } |
||
84 | parent::loadHelpers();
|
||
85 | } |
||
86 | |||
87 | /**
|
||
88 | * Render a JSON view.
|
||
89 | *
|
||
90 | * ### Special parameters
|
||
91 | * `_serialize` To convert a set of view variables into a JSON response.
|
||
92 | * Its value can be a string for single variable name or array for multiple names.
|
||
93 | * You can omit the`_serialize` parameter, and use a normal view + layout as well.
|
||
94 | * `_jsonp` Enables JSONP support and wraps response in callback function provided in query string.
|
||
95 | * - Setting it to true enables the default query string parameter "callback".
|
||
96 | * - Setting it to a string value, uses the provided query string parameter for finding the
|
||
97 | * JSONP callback name.
|
||
98 | *
|
||
99 | * @param string $view The view being rendered.
|
||
100 | * @param string $layout The layout being rendered.
|
||
101 | * @return string The rendered view.
|
||
102 | */
|
||
103 | public function render($view = null, $layout = null) { |
||
104 | $return = null; |
||
105 | if (isset($this->viewVars['_serialize'])) { |
||
106 | $return = $this->_serialize($this->viewVars['_serialize']); |
||
107 | } elseif ($view !== false && $this->_getViewFileName($view)) { |
||
108 | $return = parent::render($view, false); |
||
109 | } |
||
110 | |||
111 | if (!empty($this->viewVars['_jsonp'])) { |
||
112 | $jsonpParam = $this->viewVars['_jsonp']; |
||
113 | if ($this->viewVars['_jsonp'] === true) { |
||
114 | $jsonpParam = 'callback'; |
||
115 | } |
||
116 | if (isset($this->request->query[$jsonpParam])) { |
||
117 | $return = sprintf('%s(%s)', h($this->request->query[$jsonpParam]), $return); |
||
118 | $this->response->type('js'); |
||
119 | } |
||
120 | } |
||
121 | |||
122 | return $return; |
||
123 | } |
||
124 | |||
125 | /**
|
||
126 | * Serialize view vars
|
||
127 | *
|
||
128 | * ### Special parameters
|
||
129 | * `_jsonOptions` You can set custom options for json_encode() this way,
|
||
130 | * e.g. `JSON_HEX_TAG | JSON_HEX_APOS`.
|
||
131 | *
|
||
132 | * @param array $serialize The viewVars that need to be serialized
|
||
133 | * @throws CakeException
|
||
134 | * @return string The serialized data
|
||
135 | */
|
||
136 | protected function _serialize($serialize) { |
||
137 | if (is_array($serialize)) { |
||
138 | $data = array(); |
||
139 | foreach ($serialize as $alias => $key) { |
||
140 | if (is_numeric($alias)) { |
||
141 | $alias = $key; |
||
142 | } |
||
143 | if (array_key_exists($key, $this->viewVars)) { |
||
144 | $data[$alias] = $this->viewVars[$key]; |
||
145 | } |
||
146 | } |
||
147 | $data = !empty($data) ? $data : null; |
||
148 | } else {
|
||
149 | $data = isset($this->viewVars[$serialize]) ? $this->viewVars[$serialize] : null; |
||
150 | } |
||
151 | |||
152 | $jsonOptions = 0; |
||
153 | if (isset($this->viewVars['_jsonOptions'])) { |
||
154 | if ($this->viewVars['_jsonOptions'] === false) { |
||
155 | $jsonOptions = 0; |
||
156 | } else {
|
||
157 | $jsonOptions = $this->viewVars['_jsonOptions']; |
||
158 | } |
||
159 | } |
||
160 | if (version_compare(PHP_VERSION, '5.4.0', '>=') && Configure::read('debug')) { |
||
161 | $jsonOptions = $jsonOptions | JSON_PRETTY_PRINT; |
||
162 | } |
||
163 | |||
164 | $json = json_encode($data, $jsonOptions); |
||
165 | |||
166 | if (function_exists('json_last_error') && json_last_error() !== JSON_ERROR_NONE) { |
||
167 | throw new CakeException(json_last_error_msg()); |
||
168 | } |
||
169 | if ($json === false) { |
||
170 | throw new CakeException('Failed to parse JSON'); |
||
171 | } |
||
172 | return $json; |
||
173 | } |
||
174 | |||
175 | } |