UrlManipulator-php/server/process.php

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PHP
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2023-12-12 19:46:11 +00:00
<?php
class UrlManipulator
{
private $paramsArray = ['param1', 'param2', 'param3', 'param4'];
public function manipulateUrl($url)
{
if (!filter_var($url, FILTER_VALIDATE_URL)) {
return ['error' => 'Invalid URL', 'input' => $url];
}
$parsedUrl = parse_url($url);
$existingParams = [];
if (isset($parsedUrl['query'])) {
parse_str($parsedUrl['query'], $existingParams);
}
if (empty($this->paramsArray)) {
return ['error' => 'Params array is full', 'input' => $url];
}
$newParam = $this->getNewParam($existingParams);
if (!$newParam) {
return ['error' => 'Unable to find a unique parameter to add', 'input' => $url];
}
$randomValue = $this->generateRandomValue();
$modifiedUrl = $this->addParamToUrl($url, $newParam, $randomValue);
return [
'before' => $url,
'after' => $modifiedUrl,
];
}
private function addParamToUrl($url, $param, $value)
{
$separator = (parse_url($url, PHP_URL_QUERY) == null) ? '?' : '&';
if (strpos($url, $param . '=') !== false) {
$modifiedUrl = preg_replace('/(' . $param . '=)[^&]+/', '$1' . urlencode($value), $url);
} else {
$modifiedUrl = $url . $separator . urlencode($param) . '=' . urlencode($value);
}
return $modifiedUrl;
}
private function generateRandomValue()
{
return uniqid();
}
private function getNewParam($existingParams){
while (!empty($this->paramsArray)) {
$newParam = array_pop($this->paramsArray);
if (!array_key_exists($newParam, $existingParams)) {
return $newParam;
}
}
return null;
}
}
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$urlManipulator = new UrlManipulator();
$url = $_POST['url'];
$result = $urlManipulator->manipulateUrl($url);
header('Content-Type: application/json');
echo json_encode($result);
}