lib/public/AppFramework/Controller.php


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

<?php

/**
 * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
 * SPDX-License-Identifier: AGPL-3.0-only
 */
namespace OCP\AppFramework;

use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\JSONResponse;
use OCP\AppFramework\Http\Response;
use OCP\IRequest;

/**
 * Base class to inherit your controllers from
 * @since 6.0.0
 */
abstract class Controller {
	/**
	 * app name
	 * @var string
	 * @since 7.0.0
	 */
	protected $appName;

	/**
	 * current request
	 * @var \OCP\IRequest
	 * @since 6.0.0
	 */
	protected $request;

	/**
	 * @var array
	 * @since 7.0.0
	 */
	private $responders;

	/**
	 * constructor of the controller
	 * @param string $appName the name of the app
	 * @param IRequest $request an instance of the request
	 * @since 6.0.0 - parameter $appName was added in 7.0.0 - parameter $app was removed in 7.0.0
	 */
	public function __construct($appName,
		IRequest $request) {
		$this->appName = $appName;
		$this->request = $request;

		// default responders
		$this->responders = [
			'json' => function ($data) {
				if ($data instanceof DataResponse) {
					$response = new JSONResponse(
						$data->getData(),
						$data->getStatus()
					);
					$dataHeaders = $data->getHeaders();
					$headers = $response->getHeaders();
					// do not overwrite Content-Type if it already exists
					if (isset($dataHeaders['Content-Type'])) {
						unset($headers['Content-Type']);
					}
					$response->setHeaders(array_merge($dataHeaders, $headers));

					if ($data->getETag() !== null) {
						$response->setETag($data->getETag());
					}
					if ($data->getLastModified() !== null) {
						$response->setLastModified($data->getLastModified());
					}
					if ($data->isThrottled()) {
						$response->throttle($data->getThrottleMetadata());
					}

					return $response;
				}
				return new JSONResponse($data);
			}
		];
	}


	/**
	 * Parses an HTTP accept header and returns the supported responder type
	 * @param string $acceptHeader
	 * @param string $default
	 * @return string the responder type
	 * @since 7.0.0
	 * @since 9.1.0 Added default parameter
	 */
	public function getResponderByHTTPHeader($acceptHeader, $default = 'json') {
		$headers = explode(',', $acceptHeader);

		// return the first matching responder
		foreach ($headers as $header) {
			$header = strtolower(trim($header));

			$responder = str_replace('application/', '', $header);

			if (array_key_exists($responder, $this->responders)) {
				return $responder;
			}
		}

		// no matching header return default
		return $default;
	}


	/**
	 * Registers a formatter for a type
	 * @param string $format
	 * @param \Closure $responder
	 * @since 7.0.0
	 */
	protected function registerResponder($format, \Closure $responder) {
		$this->responders[$format] = $responder;
	}


	/**
	 * Serializes and formats a response
	 * @param mixed $response the value that was returned from a controller and
	 *                        is not a Response instance
	 * @param string $format the format for which a formatter has been registered
	 * @throws \DomainException if format does not match a registered formatter
	 * @return Response
	 * @since 7.0.0
	 */
	public function buildResponse($response, $format = 'json') {
		if (array_key_exists($format, $this->responders)) {
			$responder = $this->responders[$format];

			return $responder($response);
		}
		throw new \DomainException('No responder registered for format '.
			$format . '!');
	}
}