Proxy support

Hi

I’ve noticed that this plugin does not support HTTP proxies such as Squid.
In restricted environments with limited outgoing connectivity this is a problem because the plugin doesn’t work. Moreover if the outgoing traffic to https:/graphs.facebook.com is silently dropped by a firewall it will additionally cause a very slow site because the connections make the page hang.
Attached is a patch for version 2.4 that adds proxy support by means of picking up the settings that people have in their wp-config.php.

--- custom-facebook-feed.php	2016-04-08 16:19:14.000000000 +0200
+++ custom-facebook-feed.proxy-ok.php	2016-04-08 16:19:52.000000000 +0200
@@ -1548,6 +1548,20 @@
         //Use cURL
         if(is_callable('curl_init')){
             $ch = curl_init();
+            // Use global proxy settings
+            if (defined('WP_PROXY_HOST')) {
+              curl_setopt($ch, CURLOPT_PROXY, WP_PROXY_HOST);
+            }
+            if (defined('WP_PROXY_PORT')) {
+              curl_setopt($ch, CURLOPT_PROXYPORT, WP_PROXY_PORT);
+            }
+            if (defined('WP_PROXY_USERNAME')){
+              $auth = WP_PROXY_USERNAME;
+              if (defined('WP_PROXY_PASSWORD')){
+                $auth .= ':' . WP_PROXY_PASSWORD;
+              }
+              curl_setopt($ch, CURLOPT_PROXYUSERPWD, $auth);
+            }
             curl_setopt($ch, CURLOPT_URL, $url);
             curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
             curl_setopt($ch, CURLOPT_TIMEOUT, 20);
@@ -1575,6 +1589,20 @@
         //Auto detect
         if(is_callable('curl_init')){
             $ch = curl_init();
+            // Use global proxy settings
+            if (defined('WP_PROXY_HOST')) {
+              curl_setopt($ch, CURLOPT_PROXY, WP_PROXY_HOST);
+            }
+            if (defined('WP_PROXY_PORT')) {
+              curl_setopt($ch, CURLOPT_PROXYPORT, WP_PROXY_PORT);
+            }
+            if (defined('WP_PROXY_USERNAME')){
+              $auth = WP_PROXY_USERNAME;
+              if (defined('WP_PROXY_PASSWORD')){
+                $auth .= ':' . WP_PROXY_PASSWORD;
+              }
+              curl_setopt($ch, CURLOPT_PROXYUSERPWD, $auth);
+            }
             curl_setopt($ch, CURLOPT_URL, $url);
             curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
             curl_setopt($ch, CURLOPT_TIMEOUT, 20);

https://ww.wp.xz.cn/plugins/custom-facebook-feed/