1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\AppFramework\Http;
use \OC\AppFramework\Middleware\MiddlewareDispatcher;
use \OC\AppFramework\Http;
use \OC\AppFramework\Utility\ControllerMethodReflector;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Http\DataResponse;
use OCP\IRequest;
/**
* Class to dispatch the request to the middleware dispatcher
*/
class Dispatcher {
/** @var MiddlewareDispatcher */
private $middlewareDispatcher;
/** @var Http */
private $protocol;
/** @var ControllerMethodReflector */
private $reflector;
/** @var IRequest */
private $request;
/**
* @param Http $protocol the http protocol with contains all status headers
* @param MiddlewareDispatcher $middlewareDispatcher the dispatcher which
* runs the middleware
* @param ControllerMethodReflector $reflector the reflector that is used to inject
* the arguments for the controller
* @param IRequest $request the incoming request
*/
public function __construct(Http $protocol,
MiddlewareDispatcher $middlewareDispatcher,
ControllerMethodReflector $reflector,
IRequest $request) {
$this->protocol = $protocol;
$this->middlewareDispatcher = $middlewareDispatcher;
$this->reflector = $reflector;
$this->request = $request;
}
/**
* Handles a request and calls the dispatcher on the controller
* @param Controller $controller the controller which will be called
* @param string $methodName the method name which will be called on
* the controller
* @return array $array[0] contains a string with the http main header,
* $array[1] contains headers in the form: $key => value, $array[2] contains
* the response output
* @throws \Exception
*/
public function dispatch(Controller $controller, string $methodName): array {
$out = [null, [], null];
try {
// prefill reflector with everything thats needed for the
// middlewares
$this->reflector->reflect($controller, $methodName);
$this->middlewareDispatcher->beforeController($controller,
$methodName);
$response = $this->executeController($controller, $methodName);
// if an exception appears, the middleware checks if it can handle the
// exception and creates a response. If no response is created, it is
// assumed that theres no middleware who can handle it and the error is
// thrown again
} catch(\Exception $exception){
$response = $this->middlewareDispatcher->afterException(
$controller, $methodName, $exception);
if ($response === null) {
throw $exception;
}
}
$response = $this->middlewareDispatcher->afterController(
$controller, $methodName, $response);
// depending on the cache object the headers need to be changed
$out[0] = $this->protocol->getStatusHeader($response->getStatus(),
$response->getLastModified(), $response->getETag());
$out[1] = array_merge($response->getHeaders());
$out[2] = $response->getCookies();
$out[3] = $this->middlewareDispatcher->beforeOutput(
$controller, $methodName, $response->render()
);
$out[4] = $response;
return $out;
}
/**
* Uses the reflected parameters, types and request parameters to execute
* the controller
* @param Controller $controller the controller to be executed
* @param string $methodName the method on the controller that should be executed
* @return Response
*/
private function executeController(Controller $controller, string $methodName): Response {
$arguments = [];
// valid types that will be casted
$types = ['int', 'integer', 'bool', 'boolean', 'float'];
foreach($this->reflector->getParameters() as $param => $default) {
// try to get the parameter from the request object and cast
// it to the type annotated in the @param annotation
$value = $this->request->getParam($param, $default);
$type = $this->reflector->getType($param);
// if this is submitted using GET or a POST form, 'false' should be
// converted to false
if(($type === 'bool' || $type === 'boolean') &&
$value === 'false' &&
(
$this->request->method === 'GET' ||
strpos($this->request->getHeader('Content-Type'),
'application/x-www-form-urlencoded') !== false
)
) {
$value = false;
} elseif($value !== null && \in_array($type, $types, true)) {
settype($value, $type);
}
$arguments[] = $value;
}
$response = \call_user_func_array([$controller, $methodName], $arguments);
// format response
if($response instanceof DataResponse || !($response instanceof Response)) {
// get format from the url format or request format parameter
$format = $this->request->getParam('format');
// if none is given try the first Accept header
if($format === null) {
$headers = $this->request->getHeader('Accept');
$format = $controller->getResponderByHTTPHeader($headers, null);
}
if ($format !== null) {
$response = $controller->buildResponse($response, $format);
} else {
$response = $controller->buildResponse($response);
}
}
return $response;
}
}
|
