1 files changed, 402 insertions, 0 deletions

diff --git a/inc/3rdparty/humble-http-agent/RollingCurl.php b/inc/3rdparty/humble-http-agent/RollingCurl.php
new file mode 100644
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--- /dev/null
+++ b/inc/3rdparty/humble-http-agent/RollingCurl.php
@@ -0,0 +1,402 @@
+<?php
+/*
+Authored by Josh Fraser (www.joshfraser.com)
+Released under Apache License 2.0
+
+Maintained by Alexander Makarov, http://rmcreative.ru/
+
+Modified by Keyvan Minoukadeh for the Five Filters project: http://fivefilters.org
+*/
+
+/**
+ * Class that represent a single curl request
+ */
+class RollingCurlRequest {
+    public $url = false;
+        public $url_original = false; // used for tracking redirects
+    public $method = 'GET';
+    public $post_data = null;
+    public $headers = null;
+    public $options = null;
+
+    /**
+     * @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->url_original = $url;
+        $this->method = $method;
+        $this->post_data = $post_data;
+        $this->headers = $headers;
+        $this->options = $options;
+    }
+        
+    /**
+     * @param string $url
+     * @return void
+     */
+    public function set_original_url($url) {
+                $this->url_original = $url;
+        }
+    /**
+     * @return void
+     */
+    public function __destruct() {
+        unset($this->url, $this->url_original, $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 implements Countable {
+    /**
+     * @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 => 30,
+        CURLOPT_TIMEOUT => 30
+    );
+
+    /**
+     * @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} = $value;
+        }
+        return true;
+    }
+
+    /**
+     * Count number of requests added (Countable interface)
+     *
+     * @return int
+     */
+    public function count() {
+        return count($this->requests);
+    }   
+        
+    /**
+     * 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, $this->timeout);
+                        // removing timeout as it causes problems on Windows with PHP 5.3.5 and Curl 7.20.0
+                        if ($running) curl_multi_select($master);
+
+        } while ($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');
+                // We're managing reirects in PHP - allows us to intervene and rewrite/block URLs
+                // before the next request goes out.
+                $options[CURLOPT_FOLLOWLOCATION] = 0;
+        $options[CURLOPT_MAXREDIRS] = 0;
+        //if (ini_get('safe_mode') == 'Off' || !ini_get('safe_mode')) {
+        //    $options[CURLOPT_FOLLOWLOCATION] = 1;
+        //    $options[CURLOPT_MAXREDIRS] = 5;
+        //}
+        $headers = $this->__get('headers');
+                // append custom headers for this specific request
+                if ($request->headers) {
+                        $headers = $headers + $request->headers;
+                }
+
+        // append custom options for this specific request
+        if ($request->options) {
+            $options = $request->options + $options;
+        }
+
+        // set the request URL
+        $options[CURLOPT_URL] = $request->url;
+
+        if ($headers) {
+            $options[CURLOPT_HTTPHEADER] = $headers;
+        }
+                // return response headers
+                $options[CURLOPT_HEADER] = 1;
+                
+                // send HEAD request?
+                if ($request->method == 'HEAD') {
+                        $options[CURLOPT_NOBODY] = 1;
+                }
+
+        return $options;
+    }
+
+    /**
+     * @return void
+     */
+    public function __destruct() {
+        unset($this->window_size, $this->callback, $this->options, $this->headers, $this->requests);
+    }
+}
\ No newline at end of file