Better cURL API, use async in timings (#834)

* Improved cURL functions
* Created BulkCurlTask
* Use asynchronous cURL posting in /timings paste

Closes #509

src/pocketmine/scheduler/BulkCurlTask.php

@@ -0,0 +1,63 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+namespace pocketmine\scheduler;
+
+use pocketmine\utils\Utils;
+
+/**
+ * Executes a consecutive list of cURL operations.
+ *
+ * The result of this AsyncTask is an array of arrays (returned from {@link Utils::simpleCurl}) or RuntimeException objects.
+ *
+ * @package pocketmine\scheduler
+ */
+class BulkCurlTask extends AsyncTask{
+	private $operations;
+
+	/**
+	 * BulkCurlTask constructor.
+	 *
+	 * $operations accepts an array of arrays. Each member array must contain a string mapped to "page", and optionally,
+	 * "timeout", "extraHeaders" and "extraOpts". Documentation of these options are same as those in
+	 * {@link Utils::simpleCurl}.
+	 *
+	 * @param array      $operations
+	 * @param mixed|null $complexData
+	 */
+	public function __construct(array $operations, $complexData = null){
+		parent::__construct($complexData);
+		$this->operations = serialize($operations);
+	}
+
+	public function onRun(){
+		$operations = unserialize($this->operations);
+		$results = [];
+		foreach($operations as $op){
+			try{
+				$results[] = Utils::simpleCurl($op["page"], $op["timeout"] ?? 10, $op["extraHeaders"] ?? [], $op["extraOpts"] ?? []);
+			}catch(\RuntimeException $e){
+				$results[] = $e;
+			}
+		}
+		$this->setResult($results);
+	}
+}