Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
Total | |
85.00% |
17 / 20 |
|
87.50% |
7 / 8 |
CRAP | |
0.00% |
0 / 1 |
Telemetry | |
85.00% |
17 / 20 |
|
87.50% |
7 / 8 |
13.57 | |
0.00% |
0 / 1 |
__construct | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
getInstance | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
6 | |||
getRequestId | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
3 | |||
overrideRequestId | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
regenerateRequestId | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
getTracestate | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
2 | |||
getTraceparent | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
2 | |||
getRequestHeaders | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
1 |
1 | <?php |
2 | /** |
3 | * This program is free software; you can redistribute it and/or modify |
4 | * it under the terms of the GNU General Public License as published by |
5 | * the Free Software Foundation; either version 2 of the License, or |
6 | * (at your option) any later version. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. |
12 | * |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
16 | * http://www.gnu.org/copyleft/gpl.html |
17 | * |
18 | * @file |
19 | */ |
20 | namespace MediaWiki\Http; |
21 | |
22 | use Wikimedia\Http\TelemetryHeadersInterface; |
23 | |
24 | /** |
25 | * Service for handling telemetry data |
26 | * @unstable |
27 | * @since 1.41 |
28 | */ |
29 | class Telemetry implements TelemetryHeadersInterface { |
30 | |
31 | /** |
32 | * @var Telemetry|null |
33 | */ |
34 | private static ?Telemetry $instance = null; |
35 | |
36 | /** |
37 | * |
38 | * @var string|null Request id |
39 | */ |
40 | private ?string $reqId = null; |
41 | |
42 | /** |
43 | * Server and execution environment information. |
44 | * |
45 | * @see https://www.php.net/manual/en/reserved.variables.server.php |
46 | * @var array |
47 | */ |
48 | private array $server; |
49 | |
50 | private ?bool $allowExternalReqID; |
51 | |
52 | /** |
53 | * @param array $server Server and execution environment information, most likely the $_SERVER variable |
54 | */ |
55 | public function __construct( array $server, bool $allowExternalReqID = null ) { |
56 | $this->server = $server; |
57 | $this->allowExternalReqID = $allowExternalReqID; |
58 | } |
59 | |
60 | public static function getInstance(): Telemetry { |
61 | if ( !isset( self::$instance ) ) { |
62 | global $wgAllowExternalReqID; |
63 | self::$instance = new self( $_SERVER, $wgAllowExternalReqID ); |
64 | } |
65 | |
66 | return self::$instance; |
67 | } |
68 | |
69 | /** |
70 | * Get the current request ID. |
71 | * |
72 | * This is usually based on the `X-Request-Id` header, or the `UNIQUE_ID` |
73 | * environment variable, falling back to (process cached) randomly-generated string. |
74 | * |
75 | * @return string |
76 | */ |
77 | public function getRequestId(): string { |
78 | // This method is called from various error handlers and MUST be kept simple and stateless. |
79 | if ( !isset( $this->reqId ) ) { |
80 | if ( $this->allowExternalReqID ) { |
81 | $id = ( $this->server['HTTP_X_REQUEST_ID'] ?? $this->server['UNIQUE_ID'] ?? wfRandomString( 24 ) ); |
82 | } else { |
83 | $id = ( $this->server['UNIQUE_ID'] ?? wfRandomString( 24 ) ); |
84 | } |
85 | |
86 | $this->reqId = $id; |
87 | } |
88 | |
89 | return $this->reqId; |
90 | } |
91 | |
92 | /** |
93 | * Override the unique request ID. This is for sub-requests, such as jobs, |
94 | * that wish to use the same id but are not part of the same execution context. |
95 | * |
96 | * @param string $newId |
97 | */ |
98 | public function overrideRequestId( string $newId ): void { |
99 | $this->reqId = $newId; |
100 | } |
101 | |
102 | /** |
103 | * Regenerate the request id by setting it to null, next call to `getRequestId` |
104 | * will refetch the request id from header/UNIQUE_ID or regenerate it. |
105 | * @return void |
106 | */ |
107 | public function regenerateRequestId() { |
108 | $this->reqId = null; |
109 | } |
110 | |
111 | /** |
112 | * Get the OpenTelemetry tracestate info |
113 | * Returns null when not present or AllowExternalReqID is set to false |
114 | * |
115 | * @return string|null |
116 | */ |
117 | public function getTracestate(): ?string { |
118 | return $this->allowExternalReqID ? $this->server['HTTP_TRACESTATE'] ?? null : null; |
119 | } |
120 | |
121 | /** |
122 | * Get the OpenTelemetry traceparent info, |
123 | * Returns null when not present or AllowExternalReqID is set to false |
124 | * |
125 | * @return string|null |
126 | */ |
127 | public function getTraceparent(): ?string { |
128 | return $this->allowExternalReqID ? $this->server['HTTP_TRACEPARENT'] ?? null : null; |
129 | } |
130 | |
131 | /** |
132 | * Return Telemetry data in form of request headers |
133 | * @return array |
134 | */ |
135 | public function getRequestHeaders(): array { |
136 | return array_filter( [ |
137 | 'tracestate' => $this->getTracestate(), |
138 | 'traceparent' => $this->getTraceparent(), |
139 | 'X-Request-Id' => $this->getRequestId() |
140 | ] ); |
141 | } |
142 | } |