From ace3b9c7be4b0b5f035867d40fda0d0c86352518 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs?= <heckyel@hyperbola.info>
Date: Thu, 23 May 2019 16:41:39 -0500
Subject: update regex and organize functions

---
 tools/init.php      | 49 ++++++++++++++++++++++++++++++++++++++++++-------
 tools/processor.php | 33 +++++++++++++++------------------
 2 files changed, 57 insertions(+), 25 deletions(-)

diff --git a/tools/init.php b/tools/init.php
index 2627811..162350c 100644
--- a/tools/init.php
+++ b/tools/init.php
@@ -1,12 +1,37 @@
 <?php
 
-function get($url) {
-    $ch = curl_init();
-    curl_setopt($ch, CURLOPT_URL, $url);
-    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-    $data = curl_exec($ch);
-    curl_close($ch);
-    return $data;
+function url_exists( $baselink = NULL ) {
+    if( empty( $baselink ) ){
+        return false;
+    }
+
+    $ch = curl_init( $baselink );
+
+    // Set a timeout
+    curl_setopt( $ch, CURLOPT_TIMEOUT, 5 );
+    curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, 5 );
+
+    // Set NOBODY to true to make a HEAD-type request
+    curl_setopt( $ch, CURLOPT_NOBODY, true );
+    // Allow follow redirects
+    curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
+    // Receive the response as string, not output
+    curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
+
+    $data = curl_exec( $ch );
+
+    // Get the response code
+    $httpcode = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
+    // close connection
+    curl_close( $ch );
+
+    // Accept only answer 200 (Ok), 301 (permanent redirect) or 302 (temporary redirect)
+    $accepted_response = array( 200, 301, 302 );
+    if( in_array( $httpcode, $accepted_response ) ) {
+        return true;
+    } else {
+        return false;
+    }
 }
 
 function secToDuration($seconds){
@@ -14,3 +39,13 @@ function secToDuration($seconds){
     $seconds = ($seconds - ($minutes * 60));
     return $minutes . ' minutes ' . $seconds . ' seconds';
 }
+
+function bytes($a) {
+    $unim = array("","K","M","G","T","P");
+    $c = 0;
+    while ($a>=1000) {
+        $c++;
+        $a = $a/1000;
+    }
+    return number_format($a,($c ? 2 : 0),",",".")." ".$unim[$c];
+}
diff --git a/tools/processor.php b/tools/processor.php
index 89a37f6..6c42399 100644
--- a/tools/processor.php
+++ b/tools/processor.php
@@ -7,17 +7,25 @@ if (empty($_GET['link'])){
 
 $baselink = htmlspecialchars($_GET['link']);
 
-$yturl = 'youtu.be/';
+$urlexists = url_exists( $baselink );
+if ($urlexists == true) {
+
+    // Regex - filter URL id is match[5]
+    // Testing into → https://regexr.com/4ej96
+    $rx = '/^((?:https?:)?\/\/)?((?:www|m)\.)?((?:youtube\.com|youtu.be|invidio\.us|invidiou\.sh|invidious\.snopyta\.org))(\/(?:[\w\-]+\?v=|embed\/|v\/)?)([\w\-]+)(\S+)?$/';
+    preg_match($rx, $baselink, $match);
+
+    // Testing if id → 11 characters
+    if (strlen($match[5]) < 12) {
+        $video_id = $match[5];
+    } else {
+        header('Location: index.php');
+    }
 
-if (strpos($baselink,$yturl) !== false){
-    $link = preg_replace('~^https?://youtu\.be/([a-z\d]+)$~i', 'https://www.youtube.com/watch?v=$1', $baselink);
 } else {
-    $link = $baselink;
+    header('Location: index.php');
 }
 
-parse_str($link, $urlData);
-$video_id = array_values($urlData)[0];
-
 $video_string = file_get_contents("https://invidio.us/api/v1/videos/{$video_id}");
 
 $video_info = json_decode($video_string);
@@ -30,17 +38,6 @@ $videoChannel = $video_info->author;
 
 // Begin_ViewCount
 $extract_video_view = $video_info->viewCount;
-
-function bytes($a) {
-    $unim = array("","K","M","G","T","P");
-    $c = 0;
-    while ($a>=1000) {
-        $c++;
-        $a = $a/1000;
-    }
-    return number_format($a,($c ? 2 : 0),",",".")." ".$unim[$c];
-}
-
 $videoViews = bytes($extract_video_view);
 // End_ViewCount
 
-- 
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