Initial commit

shared/main.php

@@ -0,0 +1,13 @@
+<?php
+$webApiVersion = '0.1.0';
+
+function sendResponse($apiResponse) {
+    global $webApiVersion;
+
+    $response = [
+        'response' => $apiResponse,
+        'jsonApiVersion' => $webApiVersion,
+    ];
+
+    echo json_encode($response);
+}

shared/ratelimits.php

@@ -0,0 +1,51 @@
+<?php
+/*
+Copyright 2019 whatever127
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+function checkIfUserIsRateLimited($resource, $timeLimit = 10, $currentResLimit = 1) {
+    $clientIP = $_SERVER['REMOTE_ADDR'];
+    $ipHash = hash('sha256', "ratelimits-$clientIP");
+
+    $info = @file_get_contents('cache/'.$ipHash.'.json');
+    $info = json_decode($info, 1);
+
+    if(!isset($info['resource'])) {
+        $info['resource'] = $resource;
+    }
+
+    if(!isset($info['lastAccess'])) {
+        $info['lastAccess'] = 0;
+    }
+
+    $lastAccess = $info['lastAccess'];
+    $accessedRes = $info['resource'];
+    $blockAccessTime = $lastAccess + $timeLimit;
+
+    if($blockAccessTime > microtime(1) && $accessedRes != $resource) {
+        return true;
+    }
+
+    $info['lastAccess'] = microtime(1);
+    $info['resource'] = $resource;
+
+    @file_put_contents('cache/'.$ipHash.'.json', json_encode($info)."\n");
+
+    if($lastAccess + $currentResLimit > microtime(1) && $accessedRes == $resource) {
+        return true;
+    }
+
+    return false;
+}