Use fastcgi_finish_request is available on shutdown updates, closes #12

CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file, formatted v
 - Admin bar stats.
 - Support for Twitter counts using TwitCount.com, props @robert-gillmer.
 - Automatic social share tracking with Google Analytics.
+- Add support for `fastcgi_finish_request` when updating counts.
 
 ### Changed
 - Pass post_id to `needs_updating` method.

includes/class-shared-counts-core.php

@@ -44,7 +44,7 @@ public function __construct() {
 
 		add_action( 'wp_ajax_shared_counts_email', [ $this, 'email_ajax' ] );
 		add_action( 'wp_ajax_nopriv_shared_counts_email', [ $this, 'email_ajax' ] );
-		add_action( 'shutdown', [ $this, 'update_share_counts' ] );
+		add_action( 'shutdown', [ $this, 'shutdown_update_share_counts' ] );
 	}
 
 	/**
@@ -817,6 +817,23 @@ public function update_share_counts() {
 		}
 	}
 
+	/**
+	 * Update share counts on shutdown, after intial page rendering is complete.
+	 *
+	 * @since 1.3.0
+	 */
+	public function shutdown_update_share_counts() {
+
+		// If fastcgi_finish_request is available, run it which will close to
+		// browsers connection but allow the processing to continue in the
+		// background.
+		if ( function_exists( 'fastcgi_finish_request' ) ) {
+			fastcgi_finish_request();
+		}
+
+		$this->update_share_counts();
+	}
+
 	/**
 	 * Prime the pump.
 	 *