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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\ExcimerUI\Client; |
| 4 | |
| 5 | use ExcimerProfiler; |
| 6 | use InvalidArgumentException; |
| 7 | use JsonException; |
| 8 | use LogicException; |
| 9 | use RuntimeException; |
| 10 | |
| 11 | class ExcimerClient { |
| 12 | private const DEFAULT_CONFIG = [ |
| 13 | 'url' => null, |
| 14 | 'ingestionUrl' => null, |
| 15 | 'activate' => 'always', |
| 16 | 'period' => 0.001, |
| 17 | 'timeout' => 1, |
| 18 | 'hashKey' => null, |
| 19 | 'profileIdLength' => 16, |
| 20 | 'debugCallback' => null, |
| 21 | 'errorCallback' => null, |
| 22 | ]; |
| 23 | |
| 24 | /** @var ExcimerClient|null */ |
| 25 | private static $instance; |
| 26 | |
| 27 | /** @var bool */ |
| 28 | private $activated = false; |
| 29 | |
| 30 | /** @var array */ |
| 31 | private $config; |
| 32 | |
| 33 | /** @var ExcimerProfiler|null */ |
| 34 | private $excimer; |
| 35 | |
| 36 | /** @var string|null */ |
| 37 | private $id; |
| 38 | |
| 39 | /** @var string|null */ |
| 40 | private $profileId; |
| 41 | |
| 42 | /** |
| 43 | * Initialise the profiler. This should be called as early as possible. |
| 44 | * |
| 45 | * @param array $config Associative array with the following keys: |
| 46 | * - url: The URL for the ExcimerUI server's index.php. It can be reached |
| 47 | * via an alias, it doesn't have to have "index.php" in it. |
| 48 | * - ingestionUrl: The URL to post data to, if different from $config['url'] |
| 49 | * which would then be used for public link only. |
| 50 | * - activate: Can be one of: |
| 51 | * - "always" to always activate the profiler when setup() is called |
| 52 | * (the default) |
| 53 | * - "manual" to never activate on setup(). $profiler->activate() should |
| 54 | * be called later. |
| 55 | * - "query" to activate when the excimer_profile query string |
| 56 | * parameter is passed |
| 57 | * - period: The sampling period in seconds (default 0.001) |
| 58 | * - timeout: The request timeout for ingestion requests, in seconds. |
| 59 | * Use zero to enforce no timeout (default 0). |
| 60 | * Values smaller than 0.001 (1ms) are not supported. |
| 61 | * - hashKey: A secret key to be included in the hash, when mapping |
| 62 | * request IDs to profile IDs. Defaults to no key. |
| 63 | * - profileIdLength: The number of hexadecimal characters in a generated |
| 64 | * profile ID. Default 16. |
| 65 | * - debugCallback: A function to call back with debug messages. It takes |
| 66 | * a single parameter which is the message string. |
| 67 | * - errorCallback: A function to call back with error messages. It takes |
| 68 | * a single parameter which is the message string. This is called on |
| 69 | * request shutdown, so it is not feasible to show the message to the |
| 70 | * user. |
| 71 | * @return self |
| 72 | */ |
| 73 | public static function setup( $config ) { |
| 74 | if ( self::$instance ) { |
| 75 | throw new LogicException( 'setup() can only be called once' ); |
| 76 | } |
| 77 | self::$instance = new self( $config ); |
| 78 | self::$instance->maybeActivate(); |
| 79 | return self::$instance; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Get the instance previously created with self::setup() |
| 84 | * |
| 85 | * @return self |
| 86 | */ |
| 87 | public static function singleton(): self { |
| 88 | if ( !self::$instance ) { |
| 89 | throw new LogicException( 'setup() must be called before singleton()' ); |
| 90 | } |
| 91 | return self::$instance; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Return true if setup() has been called and the instance is activated |
| 96 | * (i.e. the profiler is running). |
| 97 | * |
| 98 | * @return bool |
| 99 | */ |
| 100 | public static function isActive(): bool { |
| 101 | return self::$instance && self::$instance->activated; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * @internal |
| 106 | * @param array $config |
| 107 | */ |
| 108 | public function __construct( $config ) { |
| 109 | $this->config = $config + self::DEFAULT_CONFIG; |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * Start the profiler and register a shutdown function which will post |
| 114 | * the results to the server. |
| 115 | */ |
| 116 | public function activate() { |
| 117 | $this->activated = true; |
| 118 | $this->excimer = new ExcimerProfiler; |
| 119 | $this->excimer->setPeriod( $this->config['period'] ); |
| 120 | $this->excimer->setEventType( EXCIMER_REAL ); |
| 121 | $this->excimer->start(); |
| 122 | register_shutdown_function( function () { |
| 123 | $this->shutdown(); |
| 124 | } ); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Shut down the profiler and send the results. This is normally called at |
| 129 | * the end of the request, but can be called manually. |
| 130 | */ |
| 131 | public function shutdown() { |
| 132 | if ( !$this->excimer ) { |
| 133 | return; |
| 134 | } |
| 135 | $this->excimer->stop(); |
| 136 | $this->sendReport(); |
| 137 | $this->excimer = null; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Make a link to the profile for the current request, and any other |
| 142 | * requests, which had the same ID set with setId(). |
| 143 | * |
| 144 | * @param array $options |
| 145 | * - text: The link text |
| 146 | * - class: A string or array of strings which will be encoded and added |
| 147 | * to the anchor class attribute. |
| 148 | * @return string |
| 149 | */ |
| 150 | public function makeLink( $options = [] ) { |
| 151 | $text = $options['text'] ?? 'Performance profile'; |
| 152 | $link = '<a href="' . htmlspecialchars( $this->getUrl() ) . '" '; |
| 153 | if ( isset( $options['class'] ) ) { |
| 154 | $class = $options['class']; |
| 155 | if ( is_array( $class ) ) { |
| 156 | $class = implode( ' ', $class ); |
| 157 | } |
| 158 | $link .= 'class="' . htmlspecialchars( $class ) . '" '; |
| 159 | } |
| 160 | $link .= '>' . htmlspecialchars( $text, ENT_NOQUOTES ) . '</a>'; |
| 161 | return $link; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Get the URL which will show the profiling results |
| 166 | * |
| 167 | * @return string |
| 168 | */ |
| 169 | public function getUrl() { |
| 170 | $url = $this->config['url'] ?? null; |
| 171 | if ( $url === null ) { |
| 172 | throw new RuntimeException( "No ingestion URL configured" ); |
| 173 | } |
| 174 | $url = rtrim( $url, '/' ); |
| 175 | return "$url/profile/" . rawurlencode( $this->getProfileId() ); |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Maybe activate the profiler, depending on config and request parameters. |
| 180 | */ |
| 181 | private function maybeActivate() { |
| 182 | switch ( $this->config['activate'] ) { |
| 183 | case 'always': |
| 184 | $this->activate(); |
| 185 | break; |
| 186 | case 'manual': |
| 187 | break; |
| 188 | case 'query': |
| 189 | if ( isset( $_GET['excimer_id'] ) ) { |
| 190 | $this->setId( $_GET['excimer_id'] ); |
| 191 | } |
| 192 | if ( isset( $_GET['excimer_profile'] ) ) { |
| 193 | $this->activate(); |
| 194 | } |
| 195 | break; |
| 196 | default: |
| 197 | throw new InvalidArgumentException( 'Unknown activation type' ); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Get the URL to post the profile to. |
| 203 | * |
| 204 | * @param string $id |
| 205 | * @return string |
| 206 | */ |
| 207 | private function getIngestionUrl( $id ) { |
| 208 | $url = $this->config['ingestionUrl'] ?? $this->config['url'] ?? null; |
| 209 | if ( $url === null ) { |
| 210 | throw new RuntimeException( "No ingestion URL configured" ); |
| 211 | } |
| 212 | return rtrim( $url, '/' ) . '/ingest/' . rawurlencode( $id ); |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Set the ID which identifies the request. If multiple requests are |
| 217 | * profiled with the same ID, they will be merged and shown together |
| 218 | * in the UI. |
| 219 | * |
| 220 | * @param string $id |
| 221 | */ |
| 222 | public function setId( string $id ) { |
| 223 | $this->id = $id; |
| 224 | $this->profileId = null; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Get the request ID, or generate a random ID. |
| 229 | * |
| 230 | * @return string |
| 231 | */ |
| 232 | private function getId() { |
| 233 | if ( $this->id === null ) { |
| 234 | $this->id = sprintf( |
| 235 | "%07x%07x%07x", |
| 236 | mt_rand() & 0xfffffff, |
| 237 | mt_rand() & 0xfffffff, |
| 238 | mt_rand() & 0xfffffff |
| 239 | ); |
| 240 | } |
| 241 | return $this->id; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Get the profile ID derived from the request ID |
| 246 | * |
| 247 | * @return string |
| 248 | */ |
| 249 | private function getProfileId() { |
| 250 | if ( $this->profileId === null ) { |
| 251 | if ( $this->config['hashKey'] !== null ) { |
| 252 | $hash = hash_hmac( 'sha512', $this->getId(), $this->config['hashKey'] ); |
| 253 | } else { |
| 254 | $hash = hash( 'sha512', $this->getId() ); |
| 255 | } |
| 256 | $this->profileId = substr( $hash, 0, $this->config['profileIdLength'] ); |
| 257 | } |
| 258 | return $this->profileId; |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Encode an array as JSON |
| 263 | * |
| 264 | * @param array $data |
| 265 | * @return string |
| 266 | * @throws JsonException |
| 267 | */ |
| 268 | private function jsonEncode( $data ) { |
| 269 | return json_encode( |
| 270 | $data, |
| 271 | JSON_THROW_ON_ERROR | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE |
| 272 | ); |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Get an array of JSON-serializable request information to be attached to |
| 277 | * the profile. |
| 278 | * |
| 279 | * @return array |
| 280 | */ |
| 281 | private function getRequestInfo() { |
| 282 | $info = []; |
| 283 | if ( PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg' ) { |
| 284 | $info['argv'] = implode( ' ', $GLOBALS['argv'] ); |
| 285 | } |
| 286 | if ( isset( $_SERVER['REQUEST_URI'] ) ) { |
| 287 | $scheme = ( @$_SERVER['HTTPS'] === 'on' || @$_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' ) |
| 288 | ? 'https://' |
| 289 | : 'http://'; |
| 290 | $info['url'] = $scheme . ( $_SERVER['HTTP_HOST'] ?? 'unknown' ) . $_SERVER['REQUEST_URI']; |
| 291 | } |
| 292 | return $info; |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * @param string $url |
| 297 | * @param array $data |
| 298 | * @return array{result:false|string,code:int,error:null|string} |
| 299 | */ |
| 300 | protected function httpRequest( string $url, array $data ) { |
| 301 | $ch = curl_init( $url ); |
| 302 | curl_setopt_array( $ch, [ |
| 303 | CURLOPT_POSTFIELDS => $data, |
| 304 | CURLOPT_USERAGENT => 'ExcimerUI', |
| 305 | CURLOPT_TIMEOUT_MS => (int)( $this->config['timeout'] * 1000 ), |
| 306 | CURLOPT_RETURNTRANSFER => true, |
| 307 | ] ); |
| 308 | $result = curl_exec( $ch ); |
| 309 | $error = $result === false ? curl_error( $ch ) : null; |
| 310 | $code = curl_getinfo( $ch, CURLINFO_RESPONSE_CODE ); |
| 311 | return [ |
| 312 | 'result' => $result, |
| 313 | 'code' => $code, |
| 314 | 'error' => $error, |
| 315 | ]; |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * Send the profile result to the server |
| 320 | */ |
| 321 | private function sendReport() { |
| 322 | $log = $this->excimer->getLog(); |
| 323 | $speedscope = $log->getSpeedscopeData(); |
| 324 | $info = $this->getRequestInfo(); |
| 325 | $name = $info['argv'] ?? $info['url'] ?? ''; |
| 326 | $speedscope['profiles'][0]['name'] = $name; |
| 327 | $data = [ |
| 328 | 'name' => $name, |
| 329 | 'request' => $this->jsonEncode( $info ), |
| 330 | 'requestId' => $this->getId(), |
| 331 | 'period' => $this->config['period'], |
| 332 | 'speedscope_deflated' => gzdeflate( $this->jsonEncode( $speedscope ) ), |
| 333 | ]; |
| 334 | $t = -microtime( true ); |
| 335 | $resp = $this->httpRequest( |
| 336 | $this->getIngestionUrl( $this->getProfileId() ), |
| 337 | $data |
| 338 | ); |
| 339 | $t += microtime( true ); |
| 340 | |
| 341 | if ( $this->config['errorCallback'] ) { |
| 342 | if ( $resp['result'] === false ) { |
| 343 | $msg = 'ExcimerUI server error: ' . $resp['error']; |
| 344 | } elseif ( $resp['code'] >= 400 ) { |
| 345 | $msg = "ExcimerUI server error {$resp['code']}"; |
| 346 | if ( preg_match( '~<h1>Excimer UI Error [0-9]+</h1>\n<p>\n(.*)\n</p>~', |
| 347 | $resp['result'], $m ) |
| 348 | ) { |
| 349 | $msg .= ": {$m[1]}"; |
| 350 | } |
| 351 | } else { |
| 352 | $msg = null; |
| 353 | } |
| 354 | if ( $msg !== null ) { |
| 355 | ( $this->config['errorCallback'] )( $msg ); |
| 356 | } |
| 357 | } |
| 358 | if ( $this->config['debugCallback'] ) { |
| 359 | ( $this->config['debugCallback'] )( |
| 360 | "Server returned response code {$resp['code']}. Total request time: " . |
| 361 | round( $t * 1000, 6 ) . ' ms.' |
| 362 | ); |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * @internal |
| 368 | */ |
| 369 | public static function resetForTest(): void { |
| 370 | if ( self::$instance ) { |
| 371 | self::$instance->excimer = null; |
| 372 | self::$instance = null; |
| 373 | } |
| 374 | } |
| 375 | } |