From 874ec8c9db9b13fb9b0c2dd879dc634df40792ce Mon Sep 17 00:00:00 2001
From: DL6ER <dl6er@dl6er.de>
Date: Thu, 23 Feb 2017 15:03:53 +0100
Subject: [PATCH] Implemented tailLog into FTL API

---
 api_FTL.php                   | 25 +++++++++++++++++++++++++
 scripts/pi-hole/js/taillog.js |  4 ++--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/api_FTL.php b/api_FTL.php
index 05baba7d..2597564b 100644
--- a/api_FTL.php
+++ b/api_FTL.php
@@ -249,6 +249,31 @@ elseif (isset($_GET['disable'], $_GET['token']) && $auth) {
 	$data = array_merge($data, array("status" => "disabled"));
 }
 
+if (isset($_GET['tailLog']) && $auth) {
+	// Not using SplFileObject here, since direct
+	// usage of f-streams will be much faster for
+	// files as large as the pihole.log
+	$file = fopen("/var/log/pihole.log","r");
+	$offset = intval($_GET['tailLog']);
+	if($offset > 0)
+	{
+		// Seeks on the file pointer where we want to continue reading is known
+		fseek($file, $offset);
+		$lines = [];
+		while (!feof($file))
+			array_push($lines,fgets($file));
+		$data = array_merge($data, array("offset" => ftell($file), "lines" => $lines));
+	}
+	else
+	{
+		// Locate the current position of the file read/write pointer
+		fseek($file, -1, SEEK_END);
+		// Add one to skip the very last "\n" in the log file
+		$data = array_merge($data, array("offset" => ftell($file)+1));
+	}
+	fclose($file);
+}
+
 if(isset($_GET["recentBlocked"]))
 {
 	sendRequestFTL("recentBlocked");
diff --git a/scripts/pi-hole/js/taillog.js b/scripts/pi-hole/js/taillog.js
index 32272de9..ffe370fc 100644
--- a/scripts/pi-hole/js/taillog.js
+++ b/scripts/pi-hole/js/taillog.js
@@ -12,7 +12,7 @@ var interval = 200;
 // Function that asks the API for new data
 function reloadData(){
     clearTimeout(timer);
-    $.getJSON("api_PHP.php?tailLog="+offset, function (data)
+    $.getJSON("api.php?tailLog="+offset, function (data)
     {
         offset = data["offset"];
         pre.append(data["lines"]);
@@ -27,7 +27,7 @@ function reloadData(){
 
 $(function(){
     // Get offset at first loading of page
-    $.getJSON("api_PHP.php?tailLog", function (data)
+    $.getJSON("api.php?tailLog", function (data)
     {
         offset = data["offset"];
     });