From f367958d69140ec3e789f31e4366912ed2640336 Mon Sep 17 00:00:00 2001
From: Jeroen De Meerleer <me@jeroened.be>
Date: Thu, 13 Jun 2024 13:41:31 +0200
Subject: [PATCH] Introduced .htaccess file and refactored index.php

A new .htaccess file has been added to handle URL rewriting. The index.php file has been significantly refactored for improved readability and performance. A large portion of the original code was moved to a separate script.php file, which is now executed from within index.php. This change simplifies the main entry point of the application and separates concerns more effectively. Additionally, minor changes were made to cache handling in script.php.
---
 .htaccess  |   4 ++
 index.php  | 143 ++---------------------------------------------------
 script.php | 138 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 147 insertions(+), 138 deletions(-)
 create mode 100644 .htaccess
 create mode 100644 script.php

diff --git a/.htaccess b/.htaccess
new file mode 100644
index 0000000..d1df4e0
--- /dev/null
+++ b/.htaccess
@@ -0,0 +1,4 @@
+RewriteEngine on
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^.*$ /index.php [L,QSA]
diff --git a/index.php b/index.php
index 4ade040..ae90bba 100644
--- a/index.php
+++ b/index.php
@@ -1,139 +1,6 @@
 <?php
-require 'vendor/autoload.php';
-$configFile = getenv('CONFIG_FILE') ?: 'config.php';
-$cacheFile = $configFile . '.cache.json';
-
-if (file_exists($configFile)) {
-    require ($configFile);
-} else {
-    echo ("Configuration file not found: " . $configFile);
-    exit(1);
-}
-if(file_exists($cacheFile)) {
-    $oldconfig = json_decode(file_get_contents($cacheFile), true);
-} else {
-    $oldconfig = [];
-}
-
-if(php_sapi_name() == 'cli' || $_SERVER["REQUEST_URI"] == '/metrics') {
-    header('Content-Type: text/plain; version=0.0.4');
-    foreach ($config as $key => &$metric) {
-        if (!isset($metric['submetrics'])) {
-            $metric['submetrics'] = [$metric];
-        }
-        foreach ($metric['submetrics'] as $subkey => &$submetric) {
-            $pid = pcntl_fork();
-            if ($pid > 0) {
-                $pids[] = $pid;
-            } else {
-                if (isset($submetric['command'])) {
-                    $output = null;
-                    $retval = null;
-                    try {
-                        exec($submetric['command'], $output, $retval);
-                        $output = implode("\n", $output);
-                    } catch (Exception $e) {
-                        $output = '';
-                    }
-                } elseif (isset($submetric['http'])) {
-                    $client = new GuzzleHttp\Client();
-
-                    $options = [];
-                    $output = NULL;
-                    if (isset($submetric['http']['proxy'])) {
-                        $options['proxy'] = $submetric['http']['proxy'];
-                    }
-                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsetime') {
-                        $options['on_stats'] = function (GuzzleHttp\TransferStats $stats) use (&$output) {
-                            $output = $stats->getTransferTime();
-                        };
-                    }
-
-                    $hasresponse = NULL;
-                    try {
-                        $res = $client->request('GET', $submetric['http']['url'], $options);
-                        $hasresponse = true;
-                    } catch (GuzzleHttp\Exception\GuzzleException $e) {
-                        if (method_exists($e, 'getResponse')) {
-                            $res = $e->getResponse();
-                            $hasresponse = true;
-                        } else {
-                            $hasresponse = false;
-                        }
-                    }
-
-                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsebody') {
-                        if ($hasresponse) {
-                            $output = $res->getBody()->getContents();
-                        } else {
-                            $output = '';
-                        }
-                    } elseif ((isset($submetric['http']['statuscode'])) && (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse')) {
-                        if ($hasresponse) {
-                            $output = $output = (int)in_array($res->getStatusCode(), $submetric['http']['statuscode']);;
-                        } else {
-                            $output = 0;
-                        }
-                    } elseif (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse') {
-                        $output = (int)$hasresponse;
-                    }
-                }
-
-                if (isset($submetric['jsonelem'])) {
-                    $submetric['value'] = getArrayValue($submetric['jsonelem'], json_decode($output, true));
-                } else {
-                    $submetric['value'] = $output;
-                }
-
-                if (is_bool($submetric['value'])) $submetric['value'] = $submetric['value'] ? 1 : 0;
-
-                file_put_contents('/tmp/.metrics.' . $key . '.' . $subkey, $submetric['value']);
-                exit();
-            }
-        }
-    }
-    foreach ($pids as $pid) {
-        pcntl_waitpid($pid, $none);
-    }
-
-
-    foreach ($config as $key => &$metric) {
-        foreach ($metric['submetrics'] as $subkey => &$submetric) {
-            $submetric['value'] = file_get_contents('/tmp/.metrics.' . $key . '.' . $subkey);
-            if (!empty($oldconfig) && !isset($submetric['value']) && (isset($submetric['fallback']) && !empty($submetric['fallback']))) {
-                if (!isset($submetric['fallback']['maxage']) || time() < ($oldconfig[$key]['submetrics'][$subkey]['time'] + $submetric['fallback']['maxage'])) {
-                    if ($submetric['fallback']['type'] == 'previous') {
-                        $submetric['value'] = $oldconfig[$key]['submetrics'][$subkey]['value'];
-                    } elseif ($submetric['fallback']['type'] == 'static') {
-                        $submetric['value'] = $submetric['fallback']['value'];
-                    }
-                    $submetric['time'] = $oldconfig[$key]['submetrics'][$subkey]['time'];
-                } else {
-                    $submetric['value'] = '';
-                    $submetric['time'] = 0;
-                }
-            } else {
-                $submetric['time'] = time();
-            }
-            unlink('/tmp/.metrics.' . $key . '.' . $subkey);
-        }
-    }
-
-    file_put_contents($cacheFile, json_encode($config, JSON_PRETTY_PRINT));
-
-    $loader = new \Twig\Loader\FilesystemLoader('templates');
-    $twig = new \Twig\Environment($loader, [
-        'cache' => 'twig_cache',
-    ]);
-    echo $twig->render('metrics.twig', ['config' => $config]);
-}
-
-function getArrayValue($elem, $array) {
-    $elem = explode('.', $elem);
-    $new_array = $array;
-    foreach ($elem as $i) {
-        if(empty($new_array)) break;
-        $new_array = $new_array[$i];
-    }
-    return $new_array;
-}
+header('Content-Type: text/plain; version=0.0.4');
+$config = getenv('CONFIG_FILE'); 
+$phpbin = getenv('PHP_BINARY');
+$output = shell_exec('CONFIG_FILE="' . $config . '" ' . $phpbin . ' script.php');
+echo $output;
diff --git a/script.php b/script.php
new file mode 100644
index 0000000..71e76ce
--- /dev/null
+++ b/script.php
@@ -0,0 +1,138 @@
+<?php
+require 'vendor/autoload.php';
+$configFile = getenv('CONFIG_FILE') ?: 'config.php';
+$cacheFile = 'twig_cache/' . hash('murmur3f', $configFile);
+
+if (file_exists($configFile)) {
+    require ($configFile);
+} else {
+    echo ("Configuration file not found: " . $configFile);
+    exit(1);
+}
+if(file_exists($cacheFile)) {
+    $oldconfig = json_decode(file_get_contents($cacheFile), true);
+} else {
+    $oldconfig = [];
+}
+
+if(php_sapi_name() == 'cli' || $_SERVER["REQUEST_URI"] == '/metrics') {
+    foreach ($config as $key => &$metric) {
+        if (!isset($metric['submetrics'])) {
+            $metric['submetrics'] = [$metric];
+        }
+        foreach ($metric['submetrics'] as $subkey => &$submetric) {
+            $pid = pcntl_fork();
+            if ($pid > 0) {
+                $pids[] = $pid;
+            } else {
+                if (isset($submetric['command'])) {
+                    $output = null;
+                    $retval = null;
+                    try {
+                        exec($submetric['command'], $output, $retval);
+                        $output = implode("\n", $output);
+                    } catch (Exception $e) {
+                        $output = '';
+                    }
+                } elseif (isset($submetric['http'])) {
+                    $client = new GuzzleHttp\Client();
+
+                    $options = [];
+                    $output = NULL;
+                    if (isset($submetric['http']['proxy'])) {
+                        $options['proxy'] = $submetric['http']['proxy'];
+                    }
+                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsetime') {
+                        $options['on_stats'] = function (GuzzleHttp\TransferStats $stats) use (&$output) {
+                            $output = $stats->getTransferTime();
+                        };
+                    }
+
+                    $hasresponse = NULL;
+                    try {
+                        $res = $client->request('GET', $submetric['http']['url'], $options);
+                        $hasresponse = true;
+                    } catch (GuzzleHttp\Exception\GuzzleException $e) {
+                        if (method_exists($e, 'getResponse')) {
+                            $res = $e->getResponse();
+                            $hasresponse = true;
+                        } else {
+                            $hasresponse = false;
+                        }
+                    }
+
+                    if (isset($submetric['http']['data']) && $submetric['http']['data'] == 'responsebody') {
+                        if ($hasresponse) {
+                            $output = $res->getBody()->getContents();
+                        } else {
+                            $output = '';
+                        }
+                    } elseif ((isset($submetric['http']['statuscode'])) && (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse')) {
+                        if ($hasresponse) {
+                            $output = $output = (int)in_array($res->getStatusCode(), $submetric['http']['statuscode']);;
+                        } else {
+                            $output = 0;
+                        }
+                    } elseif (isset($submetric['http']['data']) && $submetric['http']['data'] == 'hasresponse') {
+                        $output = (int)$hasresponse;
+                    }
+                }
+
+                if (isset($submetric['jsonelem'])) {
+                    $submetric['value'] = getArrayValue($submetric['jsonelem'], json_decode($output, true));
+                } else {
+                    $submetric['value'] = $output;
+                }
+
+                if (is_bool($submetric['value'])) $submetric['value'] = $submetric['value'] ? 1 : 0;
+
+                file_put_contents('/tmp/.metrics.' . $key . '.' . $subkey, $submetric['value']);
+                exit();
+            }
+        }
+    }
+    foreach ($pids as $pid) {
+        pcntl_waitpid($pid, $none);
+    }
+
+
+    foreach ($config as $key => &$metric) {
+        foreach ($metric['submetrics'] as $subkey => &$submetric) {
+            $submetric['value'] = file_get_contents('/tmp/.metrics.' . $key . '.' . $subkey);
+            if (!empty($oldconfig) && !isset($submetric['value']) && (isset($submetric['fallback']) && !empty($submetric['fallback']))) {
+                if (!isset($submetric['fallback']['maxage']) || time() < ($oldconfig[$key]['submetrics'][$subkey]['time'] + $submetric['fallback']['maxage'])) {
+                    if ($submetric['fallback']['type'] == 'previous') {
+                        $submetric['value'] = $oldconfig[$key]['submetrics'][$subkey]['value'];
+                    } elseif ($submetric['fallback']['type'] == 'static') {
+                        $submetric['value'] = $submetric['fallback']['value'];
+                    }
+                    $submetric['time'] = $oldconfig[$key]['submetrics'][$subkey]['time'];
+                } else {
+                    $submetric['value'] = '';
+                    $submetric['time'] = 0;
+                }
+            } else {
+                $submetric['time'] = time();
+            }
+            unlink('/tmp/.metrics.' . $key . '.' . $subkey);
+        }
+    }
+
+    file_put_contents($cacheFile, json_encode($config, JSON_PRETTY_PRINT));
+
+    $loader = new \Twig\Loader\FilesystemLoader('templates');
+    $twig = new \Twig\Environment($loader, [
+        'cache' => 'twig-cache',
+    ]);
+    echo $twig->render('metrics.twig', ['config' => $config]);
+}
+
+function getArrayValue($elem, $array) {
+    $elem = explode('.', $elem);
+    $new_array = $array;
+    foreach ($elem as $i) {
+        if(empty($new_array)) break;
+        $new_array = $new_array[$i];
+    }
+    return $new_array;
+}