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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 | <?php /* Authored by Josh Fraser (www.joshfraser.com) Released under Apache License 2.0 Maintained by Alexander Makarov, http://rmcreative.ru/ $Id$ */ /** * Class that represent a single curl request */ class RollingCurlRequest { public $url = false; public $method = 'GET'; public $post_data = null; public $headers = null; public $options = null; public $metadata = Array(); /** * @param string $url * @param string $method * @param $post_data * @param $headers * @param $options * @return void */ function __construct($url, $method = "GET", $post_data = null, $headers = null, $options = null) { $this->url = $url; $this->method = $method; $this->post_data = $post_data; $this->headers = $headers; $this->options = $options; } /** * @return void */ public function __destruct() { unset($this->url, $this->method, $this->post_data, $this->headers, $this->options); } } /** * RollingCurl custom exception */ class RollingCurlException extends Exception { } /** * Class that holds a rolling queue of curl requests. * * @throws RollingCurlException */ class RollingCurl { /** * @var int * * Window size is the max number of simultaneous connections allowed. * * REMEMBER TO RESPECT THE SERVERS: * Sending too many requests at one time can easily be perceived * as a DOS attack. Increase this window_size if you are making requests * to multiple servers or have permission from the receving server admins. */ private $window_size = 5; /** * @var float * * Timeout is the timeout used for curl_multi_select. */ private $timeout = 10; /** * @var string|array * * Callback function to be applied to each result. */ private $callback; /** * @var array * * Set your base options that you want to be used with EVERY request. */ protected $options = array( CURLOPT_SSL_VERIFYPEER => 0, CURLOPT_RETURNTRANSFER => 1, CURLOPT_CONNECTTIMEOUT => 60, CURLOPT_TIMEOUT => 60 ); /** * @var array */ private $headers = array(); /** * @var Request[] * * The request queue */ private $requests = array(); /** * @var RequestMap[] * * Maps handles to request indexes */ private $requestMap = array(); /** * @param $callback * Callback function to be applied to each result. * * Can be specified as 'my_callback_function' * or array($object, 'my_callback_method'). * * Function should take three parameters: $response, $info, $request. * $response is response body, $info is additional curl info. * $request is the original request * * @return void */ function __construct($callback = null) { $this->callback = $callback; } /** * @param string $name * @return mixed */ public function __get($name) { return (isset($this->{$name})) ? $this->{$name} : null; } /** * @param string $name * @param mixed $value * @return bool */ public function __set($name, $value) { // append the base options & headers if ($name == "options" || $name == "headers") { $this->{$name} = $value + $this->{$name}; } else { $this->{$name} = $value; } return true; } /** * Add a request to the request queue * * @param Request $request * @return bool */ public function add($request) { $this->requests[] = $request; return true; } /** * Create new Request and add it to the request queue * * @param string $url * @param string $method * @param $post_data * @param $headers * @param $options * @return bool */ public function request($url, $method = "GET", $post_data = null, $headers = null, $options = null) { $this->requests[] = new RollingCurlRequest($url, $method, $post_data, $headers, $options); return true; } /** * Perform GET request * * @param string $url * @param $headers * @param $options * @return bool */ public function get($url, $headers = null, $options = null) { return $this->request($url, "GET", null, $headers, $options); } /** * Perform POST request * * @param string $url * @param $post_data * @param $headers * @param $options * @return bool */ public function post($url, $post_data = null, $headers = null, $options = null) { return $this->request($url, "POST", $post_data, $headers, $options); } /** * Execute processing * * @param int $window_size Max number of simultaneous connections * @return string|bool */ public function execute($window_size = null) { // rolling curl window must always be greater than 1 if (sizeof($this->requests) == 1) { return $this->single_curl(); } else { // start the rolling curl. window_size is the max number of simultaneous connections return $this->rolling_curl($window_size); } } /** * Performs a single curl request * * @access private * @return string */ private function single_curl() { $ch = curl_init(); $request = array_shift($this->requests); $options = $this->get_options($request); curl_setopt_array($ch, $options); $output = curl_exec($ch); $info = curl_getinfo($ch); // it's not neccesary to set a callback for one-off requests if ($this->callback) { $callback = $this->callback; if (is_callable($this->callback)) { call_user_func($callback, $output, $info, $request); } } else return $output; return true; } /** * Performs multiple curl requests * * @access private * @throws RollingCurlException * @param int $window_size Max number of simultaneous connections * @return bool */ private function rolling_curl($window_size = null) { if ($window_size) $this->window_size = $window_size; // make sure the rolling window isn't greater than the # of urls if (sizeof($this->requests) < $this->window_size) $this->window_size = sizeof($this->requests); if ($this->window_size < 2) { throw new RollingCurlException("Window size must be greater than 1"); } $master = curl_multi_init(); // start the first batch of requests for ($i = 0; $i < $this->window_size; $i++) { $ch = curl_init(); $options = $this->get_options($this->requests[$i]); curl_setopt_array($ch, $options); curl_multi_add_handle($master, $ch); // Add to our request Maps $key = (string) $ch; $this->requestMap[$key] = $i; } do { while (($execrun = curl_multi_exec($master, $running)) == CURLM_CALL_MULTI_PERFORM) ; if ($execrun != CURLM_OK) break; // a request was just completed -- find out which one while ($done = curl_multi_info_read($master)) { // get the info and content returned on the request $info = curl_getinfo($done['handle']); $output = curl_multi_getcontent($done['handle']); // send the return values to the callback function. $callback = $this->callback; if (is_callable($callback)) { $key = (string) $done['handle']; $request = $this->requests[$this->requestMap[$key]]; unset($this->requestMap[$key]); call_user_func($callback, $output, $info, $request); } // start a new request (it's important to do this before removing the old one) if ($i < sizeof($this->requests) && isset($this->requests[$i]) && $i < count($this->requests)) { $ch = curl_init(); $options = $this->get_options($this->requests[$i]); curl_setopt_array($ch, $options); curl_multi_add_handle($master, $ch); // Add to our request Maps $key = (string) $ch; $this->requestMap[$key] = $i; $i++; } // remove the curl handle that just completed curl_multi_remove_handle($master, $done['handle']); } // Block for data in / output; error handling is done by curl_multi_exec if ($running) curl_multi_select($master, $this->timeout); } while ($running); curl_multi_close($master); return true; } /** * Helper function to set up a new request by setting the appropriate options * * @access private * @param Request $request * @return array */ private function get_options($request) { // options for this entire curl object $options = $this->__get('options'); if (ini_get('safe_mode') == 'Off' || !ini_get('safe_mode')) { $options[CURLOPT_FOLLOWLOCATION] = 1; $options[CURLOPT_MAXREDIRS] = 5; } $headers = $this->__get('headers'); // append custom options for this specific request if ($request->options) { $options = $request->options + $options; } // set the request URL $options[CURLOPT_URL] = $request->url; // posting data w/ this request? if ($request->post_data) { $options[CURLOPT_POST] = 1; $options[CURLOPT_POSTFIELDS] = $request->post_data; } if ($headers) { $options[CURLOPT_HEADER] = 0; $options[CURLOPT_HTTPHEADER] = $headers; } return $options; } /** * @return void */ public function __destruct() { unset($this->window_size, $this->callback, $this->options, $this->headers, $this->requests); } } |