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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
<?php
namespace JsonRPC;
use ReflectionFunction;
use Closure;
/**
* JsonRPC server class
*
* @package JsonRPC
* @author Frderic Guillot
* @license Unlicense http://unlicense.org/
*/
class Server
{
/**
* Data received from the client
*
* @access private
* @var string
*/
private $payload;
/**
* List of procedures
*
* @static
* @access private
* @var array
*/
static private $procedures = array();
/**
* Constructor
*
* @access public
* @param string $payload Client data
*/
public function __construct($payload = '')
{
$this->payload = $payload;
}
/**
* IP based client restrictions
*
* Return an HTTP error 403 if the client is not allowed
*
* @access public
* @param array $hosts List of hosts
*/
public function allowHosts(array $hosts) {
if (! in_array($_SERVER['REMOTE_ADDR'], $hosts)) {
header('Content-Type: application/json');
header('HTTP/1.0 403 Forbidden');
echo '["Access Forbidden"]';
exit;
}
}
/**
* HTTP Basic authentication
*
* Return an HTTP error 401 if the client is not allowed
*
* @access public
* @param array $users Map of username/password
*/
public function authentication(array $users)
{
// OVH workaround
if (isset($_SERVER['REMOTE_USER'])) {
list($_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW']) = explode(':', base64_decode(substr($_SERVER['REMOTE_USER'], 6)));
}
if (! isset($_SERVER['PHP_AUTH_USER']) ||
! isset($users[$_SERVER['PHP_AUTH_USER']]) ||
$users[$_SERVER['PHP_AUTH_USER']] !== $_SERVER['PHP_AUTH_PW']) {
header('WWW-Authenticate: Basic realm="JsonRPC"');
header('Content-Type: application/json');
header('HTTP/1.0 401 Unauthorized');
echo '["Authentication failed"]';
exit;
}
}
/**
* Register a new procedure
*
* @access public
* @param string $name Procedure name
* @param closure $callback Callback
*/
public function register($name, Closure $callback)
{
self::$procedures[$name] = $callback;
}
/**
* Unregister a procedure
*
* @access public
* @param string $name Procedure name
*/
public function unregister($name)
{
if (isset(self::$procedures[$name])) {
unset(self::$procedures[$name]);
}
}
/**
* Unregister all procedures
*
* @access public
*/
public function unregisterAll()
{
self::$procedures = array();
}
/**
* Return the response to the client
*
* @access public
* @param array $data Data to send to the client
* @param array $payload Incoming data
* @return string
*/
public function getResponse(array $data, array $payload = array())
{
if (! array_key_exists('id', $payload)) {
return '';
}
$response = array(
'jsonrpc' => '2.0',
'id' => $payload['id']
);
$response = array_merge($response, $data);
@header('Content-Type: application/json');
return json_encode($response);
}
/**
* Map arguments to the procedure
*
* @access public
* @param array $request_params Incoming arguments
* @param array $method_params Procedure arguments
* @param array $params Arguments to pass to the callback
* @return bool
*/
public function mapParameters(array $request_params, array $method_params, array &$params)
{
// Positional parameters
if (array_keys($request_params) === range(0, count($request_params) - 1)) {
if (count($request_params) !== count($method_params)) return false;
$params = $request_params;
return true;
}
// Named parameters
foreach ($method_params as $p) {
$name = $p->getName();
if (isset($request_params[$name])) {
$params[$name] = $request_params[$name];
}
else if ($p->isDefaultValueAvailable()) {
continue;
}
else {
return false;
}
}
return true;
}
/**
* Parse incoming requests
*
* @access public
* @return string
*/
public function execute()
{
// Parse payload
if (empty($this->payload)) {
$this->payload = file_get_contents('php://input');
}
if (is_string($this->payload)) {
$this->payload = json_decode($this->payload, true);
}
// Check JSON format
if (! is_array($this->payload)) {
return $this->getResponse(array(
'error' => array(
'code' => -32700,
'message' => 'Parse error'
)),
array('id' => null)
);
}
// Handle batch request
if (array_keys($this->payload) === range(0, count($this->payload) - 1)) {
$responses = array();
foreach ($this->payload as $payload) {
if (! is_array($payload)) {
$responses[] = $this->getResponse(array(
'error' => array(
'code' => -32600,
'message' => 'Invalid Request'
)),
array('id' => null)
);
}
else {
$server = new Server($payload);
$response = $server->execute();
if ($response) $responses[] = $response;
}
}
return empty($responses) ? '' : '['.implode(',', $responses).']';
}
// Check JSON-RPC format
if (! isset($this->payload['jsonrpc']) ||
! isset($this->payload['method']) ||
! is_string($this->payload['method']) ||
$this->payload['jsonrpc'] !== '2.0' ||
(isset($this->payload['params']) && ! is_array($this->payload['params']))) {
return $this->getResponse(array(
'error' => array(
'code' => -32600,
'message' => 'Invalid Request'
)),
array('id' => null)
);
}
// Procedure not found
if (! isset(self::$procedures[$this->payload['method']])) {
return $this->getResponse(array(
'error' => array(
'code' => -32601,
'message' => 'Method not found'
)),
$this->payload
);
}
$callback = self::$procedures[$this->payload['method']];
$params = array();
$reflection = new ReflectionFunction($callback);
if (isset($this->payload['params'])) {
$parameters = $reflection->getParameters();
if (! $this->mapParameters($this->payload['params'], $parameters, $params)) {
return $this->getResponse(array(
'error' => array(
'code' => -32602,
'message' => 'Invalid params'
)),
$this->payload
);
}
}
$result = $reflection->invokeArgs($params);
return $this->getResponse(array('result' => $result), $this->payload);
}
}
|
