|
1
|
|
|
<?php namespace Comodojo\Dispatcher\Router; |
|
2
|
|
|
|
|
3
|
|
|
use \Comodojo\Dispatcher\Router\Route; |
|
4
|
|
|
use \Psr\Log\LoggerInterface; |
|
5
|
|
|
use \Comodojo\Exception\DispatcherException; |
|
6
|
|
|
use \Exception; |
|
7
|
|
|
|
|
8
|
|
|
/** |
|
9
|
|
|
* @package Comodojo Dispatcher |
|
10
|
|
|
* @author Marco Giovinazzi <[email protected]> |
|
11
|
|
|
* @author Marco Castiello <[email protected]> |
|
12
|
|
|
* @license GPL-3.0+ |
|
13
|
|
|
* |
|
14
|
|
|
* LICENSE: |
|
15
|
|
|
* |
|
16
|
|
|
* This program is free software: you can redistribute it and/or modify |
|
17
|
|
|
* it under the terms of the GNU Affero General Public License as |
|
18
|
|
|
* published by the Free Software Foundation, either version 3 of the |
|
19
|
|
|
* License, or (at your option) any later version. |
|
20
|
|
|
* |
|
21
|
|
|
* This program is distributed in the hope that it will be useful, |
|
22
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
23
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
24
|
|
|
* GNU Affero General Public License for more details. |
|
25
|
|
|
* |
|
26
|
|
|
* You should have received a copy of the GNU Affero General Public License |
|
27
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>. |
|
28
|
|
|
*/ |
|
29
|
|
|
|
|
30
|
|
|
class Parser { |
|
31
|
|
|
|
|
32
|
|
|
public $logger; |
|
33
|
|
|
|
|
34
|
1 |
|
public function __construct(LoggerInterface $logger) { |
|
35
|
|
|
|
|
36
|
1 |
|
$this->logger = $logger; |
|
37
|
|
|
|
|
38
|
1 |
|
} |
|
39
|
|
|
|
|
40
|
|
|
// This method read the route (folder by folder recursively) and build |
|
41
|
|
|
// the global regular expression against which all the request URI will be compared |
|
42
|
1 |
|
public function read($folders = array(), Route $value = null, $regex = '') { |
|
43
|
|
|
|
|
44
|
1 |
|
if (is_null($value)) { |
|
45
|
|
|
|
|
46
|
1 |
|
$value = new Route(); |
|
47
|
|
|
|
|
48
|
1 |
|
} |
|
49
|
|
|
|
|
50
|
|
|
// if the first 'folder' is empty is removed |
|
51
|
1 |
|
while (!empty($folders) && empty($folders[0])) { |
|
52
|
|
|
|
|
53
|
|
|
array_shift($folders); |
|
54
|
|
|
|
|
55
|
|
|
} |
|
56
|
|
|
|
|
57
|
|
|
// if the 'folder' array is empty, the route has been fully analyzed |
|
58
|
|
|
// this is the exit condition from the recursive loop. |
|
59
|
1 |
|
if (empty($folders)) { |
|
60
|
|
|
|
|
61
|
1 |
|
return '^'.$regex.'[\/]?$'; |
|
62
|
|
|
|
|
63
|
|
|
} else { |
|
64
|
|
|
|
|
65
|
|
|
// The first element of the array 'folders' is taken in order to be analyzed |
|
66
|
1 |
|
$folder = array_shift($folders); |
|
67
|
|
|
|
|
68
|
|
|
// All the parameters of the route must be json strings |
|
69
|
1 |
|
$decoded = json_decode($folder, true); |
|
70
|
|
|
|
|
71
|
1 |
|
if (!is_null($decoded) && is_array($decoded)) { |
|
72
|
|
|
|
|
73
|
1 |
|
$param_regex = ''; |
|
74
|
|
|
|
|
75
|
1 |
|
$param_required = false; |
|
76
|
|
|
|
|
77
|
|
|
/* All the folders can include more than one parameter |
|
78
|
|
|
* Eg: /service_name/{'param1': 'regex1', 'param2': 'regex2'}/ |
|
79
|
|
|
* /calendar/{'ux_timestamp*': '\d{10}', 'microseconds': '\d{4}'}/ |
|
80
|
|
|
* |
|
81
|
|
|
* The '*' at the end of the paramerter name implies that the parameter is required |
|
82
|
|
|
* This example can be read as a calendar service that accepts both |
|
83
|
|
|
* timestamps in unix or javascript format. |
|
84
|
|
|
* |
|
85
|
|
|
* This is the reason of the following 'foreach' |
|
86
|
|
|
*/ |
|
87
|
1 |
|
foreach ($decoded as $key => $string) { |
|
88
|
|
|
|
|
89
|
1 |
|
$this->logger->debug("PARAMETER KEY: " . $key); |
|
90
|
|
|
|
|
91
|
1 |
|
$this->logger->debug("PARAMETER STRING: " . $string); |
|
92
|
|
|
|
|
93
|
|
|
/* The key and the regex of every paramater is passed to the 'param' |
|
94
|
|
|
* method which will build an appropriate regular expression and will understand |
|
95
|
|
|
* if the parameter is required and will build the Route query object |
|
96
|
|
|
*/ |
|
97
|
1 |
|
$param_regex .= $this->param($key, $string, $value); |
|
98
|
|
|
|
|
99
|
1 |
|
if ($value->isQueryRequired($key)) $param_required = true; |
|
100
|
|
|
|
|
101
|
1 |
|
$this->logger->debug("PARAMETER REGEX: " . $param_regex); |
|
102
|
|
|
|
|
103
|
1 |
|
} |
|
104
|
|
|
// Once the parameter is analyzed, the result is passed to the next iteration |
|
105
|
1 |
|
return $this->read( |
|
106
|
1 |
|
$folders, |
|
107
|
1 |
|
$value, |
|
108
|
1 |
|
$regex.'(?:\/'.$param_regex.')'. (($param_required)?'{1}':'?') |
|
109
|
1 |
|
); |
|
110
|
|
|
|
|
111
|
|
|
} else { |
|
112
|
|
|
// if the element is not a json string, I assume it's the service name |
|
113
|
1 |
|
$value->addService($folder); |
|
114
|
|
|
|
|
115
|
1 |
|
return $this->read( |
|
116
|
1 |
|
$folders, |
|
117
|
1 |
|
$value, |
|
118
|
1 |
|
$regex.'\/'.$folder |
|
119
|
1 |
|
); |
|
120
|
|
|
|
|
121
|
|
|
} |
|
122
|
|
|
|
|
123
|
|
|
} |
|
124
|
|
|
|
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
// This method read a single parameter and build the regular expression |
|
128
|
1 |
|
private function param($key, $string, $value) { |
|
129
|
|
|
|
|
130
|
1 |
|
$field_required = false; |
|
131
|
|
|
|
|
132
|
|
|
// If the field name ends with a '*', the parameter is considered as required |
|
133
|
1 |
|
if (preg_match('/^(.+)\*$/', $key, $bits)) { |
|
134
|
|
|
|
|
135
|
1 |
|
$key = $bits[1]; |
|
136
|
1 |
|
$field_required = true; |
|
137
|
|
|
|
|
138
|
1 |
|
} |
|
139
|
|
|
|
|
140
|
|
|
// The $value query object contains all regex which will be used by the collector to parse the route fields |
|
141
|
1 |
|
$value->setQuery($key, $string, $field_required); |
|
142
|
|
|
|
|
143
|
|
|
/* Every parameter can include it's own logic into the regular expression, |
|
144
|
|
|
* it can use backreferences and it's expected to be used against a single parameter. |
|
145
|
|
|
* This means that it can't be used as is to build the route regular expression, |
|
146
|
|
|
* Backreferences are not useful at this point and can make the regular expression more time consuming |
|
147
|
|
|
* and resource hungry. This is why they are replaced with the grouping parenthesis. |
|
148
|
|
|
* Eg: (value) changes in (?:value) |
|
149
|
|
|
* |
|
150
|
|
|
* Delimiting characters like '^' and '$' are also meaningless in the complete regular expression and |
|
151
|
|
|
* need to be removed. Contrariwise, wildcards must be delimited in order to keet the whole regular |
|
152
|
|
|
* expression consistent, hence a '?' is added to all the '.*' or '.+' that don't already have one. |
|
153
|
|
|
*/ |
|
154
|
1 |
|
$string = preg_replace("/(?<!\\\\)\\((?!\\?)/", '(?:', $string); |
|
155
|
1 |
|
$string = preg_replace("/\\.([\\*\\+])(?!\\?)/", '.${1}?', $string); |
|
156
|
1 |
|
$string = preg_replace("/^[\\^]/", '', $string); |
|
157
|
1 |
|
$string = preg_replace("/[\\$]$/", '', $string); |
|
158
|
|
|
|
|
159
|
|
|
/* The produced regular expression is grouped and associated with its key (this means that the 'preg_match' |
|
160
|
|
|
* function will generate an associative array where the key/value association is preserved). |
|
161
|
|
|
* If the field is required, the regular expression is completed with a '{1}' (which make it compulsory), |
|
162
|
|
|
* otherwise a '?' is added. |
|
163
|
|
|
*/ |
|
164
|
1 |
|
return '(?P<' . $key . '>' . $string . ')' . (($field_required)?'{1}':'?'); |
|
165
|
|
|
|
|
166
|
|
|
} |
|
167
|
|
|
|
|
168
|
|
|
} |
|
169
|
|
|
|
comodojo /
dispatcher.framework
