Initial commit with base functionality
This commit is contained in:
commit
ad542cf940
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@ -0,0 +1,362 @@
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<?php
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class RedirectCheck
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{
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// constants
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const USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36";
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const ERROR_CURL_INIT = "Couldn't initialize a cURL handle";
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const ERROR_CURL_CODE = "Could not curl_getinfo the HTTP code";
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const ERROR_CURL_REDIRECT = "Could not curl_getinfo the redirect URL";
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// properties
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public string $url;
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public string $next;
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public int $code;
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public int $step;
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public bool $redirect;
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public array $path;
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public array $error;
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// constructor
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public function __construct(string $url)
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{
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$this->url = $url;
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$this->next = '';
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$this->code = 0;
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$this->step = 1;
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$this->redirect = false;
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$this->error = [];
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$this->path[$this->step] = [
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'step' => $this->step,
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'url' => $this->url,
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'code' => null,
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'next' => null ];
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}
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// create an error message
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private function setError(array $error): void
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{
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$this->error = $error;
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}
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// add an entry to the URL path
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private function addPath(int $step, array $path): void
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{
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$this->path[$step] = $path;
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}
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// update a path entry
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public function updatePath(int $step, string $key, string $value): void
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{
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$this->path[$step][$key] = $value;
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}
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// create a curl request for a URL
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public function getHttpCode()
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{
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// initate curl request
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$ch = curl_init();
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if (!$ch) {
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$this->setError = ['type' => 'curl', 'message' => self::ERROR_CURL_INIT];
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return false;
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}
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// set request headers and execute
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$response = curl_setopt($ch, CURLOPT_URL, $this->url);
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$response = curl_setopt($ch, CURLOPT_HEADER, true); // enable this for debugging
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$response = curl_setopt($ch, CURLOPT_HTTPGET, true); // redundant but making sure it's a GET
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$response = curl_setopt($ch, CURLOPT_NOBODY, false); // settings this to true was returning 405s
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$response = curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
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$response = curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // return output instead of going to screen
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$response = curl_setopt($ch, CURLOPT_TIMEOUT, 60);
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$response = curl_setopt($ch, CURLOPT_USERAGENT, self::USER_AGENT);
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$response = curl_exec($ch);
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// check for a response
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if (empty($response))
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{
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$this->setError(['type' => 'curl', 'message' => curl_error($ch)]);
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curl_close($ch);
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}
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else
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{
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// get the http status code
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if (curl_getinfo($ch, CURLINFO_HTTP_CODE))
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{
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$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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$this->code = ($code) ? $code : 0;
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if ($code == 200) {
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$this->updatePath($this->step, 'code', $this->code);
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return true;
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}
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}
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else
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{
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$this->code = 0;
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$this->setError(['type' => 'curl', 'message' => self::ERROR_CURL_CODE]);
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return false;
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}
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// get any redirect url to follow next
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if (curl_getinfo($ch, CURLINFO_REDIRECT_URL))
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{
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$next = curl_getinfo($ch, CURLINFO_REDIRECT_URL);
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$this->redirect = ($next) ? true : false;
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$this->next = ($next) ? $next : '';
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}
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else
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{
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$this->redirect = false;
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$this->next = '';
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}
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// close the session
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curl_close($ch);
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// update the current path
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$this->updatePath($this->step, 'code', $this->code);
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$this->updatePath($this->step, 'next', $this->next);
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// start the next path
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$this->step++;
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$this->addPath(
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$this->step,
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[
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'step' => $this->step,
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'url' => $this->next,
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'code' => null,
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'next' => null
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]);
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return true;
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}
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// return false if we get here
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return false;
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}
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// get the final URL redirect
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public function getFinalRedirect(): string
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{
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$last = end($this->path);
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return $last['url'];
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}
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}
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// handle form submissions
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if (isset($_POST['url']))
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{
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// check that we got a valid URL
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$url = (filter_var(trim($_POST['url']), FILTER_VALIDATE_URL))
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? trim($_POST['url'])
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: false;
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// if so, start up the redirect checks
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if ($url)
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{
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// make a request for this url and add to the path
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$request = new RedirectCheck($url);
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$code = '';
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do {
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// set the URL
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$request->url = $url;
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// make the curl request and update the path
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$request->getHttpCode();
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// end on an error
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if ($request->error)
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{
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break;
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}
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// if we have a redirect to follow, update our working $url
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$url = ($request->next) ? $request->next : false;
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// update our code
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$code = ($request->code) ? $request->code : false;
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} while ($code != 200);
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}
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}
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?>
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<!DOCTYPE html>
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<html>
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<head>
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<title>Redirect Checker</title>
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<link rel="stylesheet" type="text/css" href="style.css" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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</head>
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<body>
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<header>
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<menu>
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<h1>Redirect Checker</h1>
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<nav>
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<a href="/"><span>Check a new URL</span></a>
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</nav>
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</menu>
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<form method="post" action="index.php" type="application/x-www-form-urlencoded">
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<input type="search" value="" placeholder="URL to check..." name="url">
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<button type="submit">Check</button>
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</form>
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</header>
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<main>
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<?php
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if (isset($request) && count($request->path) > 0)
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{
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$steps = count($request->path) - 1;
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$count = ($steps == 1) ? '1 redirect' : $steps.' redirects';
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echo "
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<article>
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<h2>
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Final destination
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</h2>
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<p>
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The URL you traced had ".$count." and ended here:
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</p>
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<p class=\"final\">
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<a href=\"".$request->getFinalRedirect()."\" target=\"blank\">
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".$request->getFinalRedirect()."
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</a>
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</p>
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<h3>
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Redirect trace
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</h3>
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<table>
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<thead>
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<tr>
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<th>Step</th>
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<th>Request</th>
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<th>Code</th>
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<th>Redirect</th>
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</tr>
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</thead>
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<tbody>";
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foreach ($request->path as $step)
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{
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$item = $step['step'];
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$url = $step['url'];
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$code = $step['code'];
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$next = ($step['next']) ? 'Yes' : '--';
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echo "
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<tr>
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<td>".$item."</td>
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<td>".$url."</td>
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<td><code>".$code."</code></td>
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<td>".$next."</td>
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</tr>";
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}
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echo "
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</tbody>
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<caption>
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User agent: ".$request::USER_AGENT."
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</caption>
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</table>
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</article>";
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}
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else
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{
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echo "
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<article>
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<h2>
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Trace a URL's redirects
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</h2>
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<p>
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Enter a URL in the search box above to derive the final resolved URL after all redirects. The script runs recursive cURL requests until we get a <code>200</code> status code. This is helpful to get around link tracking or original URLs that Pi-hole outright blocks (like email links).
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</p>
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<p>
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I used to use <a href=\"https://wheregoes.com\">wheregoes.com</a> which is a good, reliable service, but decided to roll my own for privacy reasons. Absolutely nothing is logged as all URL searches are via POST and that's not currently included in my nginx logs.
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</p>
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<h3>
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Technical details
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</h3>
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<p>
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User agent
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</p>
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<p>
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Other cURL settings
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</p>
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</article>
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";
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}
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?>
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<aside>
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<h3>
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HTTP response status codes
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</h3>
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<details>
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<summary>
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Informational (<code>1XX</code>–<code>199</code>)
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</summary>
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<dl>
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<dt>
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<label for="100">
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<code>100</code> Continue
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</label>
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</dt>
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<input type="checkbox" id="100">
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<dd>Continue the request or ignore the response if the request is already finished.</dd>
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<dt>
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<label for="101">
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<code>101</code> Switching Protocols
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</label>
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</dt>
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<input type="checkbox" id="101">
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<dd>Sent in response to a client's <code>Upgrade</code> request header and indicates the protocol the server is switching to.</dd>
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<dt>
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<label for="102">
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<code>102</code> Processing
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</label>
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</dt>
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<input type="checkbox" id="102">
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<dd>Server has received and is processing the request, but no response is available yet.</dd>
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<dt>
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<label for="103">
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<code>103</code> Early Hints
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</label>
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</dt>
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<input type="checkbox" id="103">
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<dd>Intended alongside <code>Link</code> header to let the user agent preconnect or start preloading resources while the server prepares a response.</dd>
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</dl>
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</details>
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<details>
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<summary>
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Successful (<code>2XX</code>–<code>299</code>)
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</summary>
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<p>
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200
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</p>
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</details>
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<details>
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<summary>
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Redirects (<code>3XX</code>–<code>399</code>)
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</summary>
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<p>
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300
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</p>
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</details>
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<details>
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<summary>
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Client error (<code>4XX</code>–<code>499</code>)
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</summary>
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<p>
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100
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</p>
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</details>
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<details>
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<summary>
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Server error (<code>5XX</code>–<code>599</code>)
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</summary>
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<p>
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500
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</p>
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</details>
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<p>
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See <a href="https://httpwg.org/specs/rfc9110.html#overview.of.status.codes">RFC 9110</a> for official documentation on each status code.
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</p>
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</aside>
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</main>
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</body>
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</html>
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@ -0,0 +1,255 @@
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html {
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font-size: 16px;
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height: 100%;
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margin: 0;
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padding: 0;
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}
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body {
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align-items: center;
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background: #f5f5f5;
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border-top: 5px solid #1a1a1a;
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color: #1a1a1a;
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display: flex;
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flex-direction: column;
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font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, Arial, Noto Sans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
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font-size: 1rem;
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min-height: calc(100% - 5px);
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margin: 0;
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||||
}
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||||
|
||||
header {
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||||
align-items: center;
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background: #fff;
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||||
display: flex;
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flex-direction: column;
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padding-bottom: 3rem;
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width: 100%;
|
||||
}
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||||
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menu {
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align-items: center;
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align-self: stretch;
|
||||
display: flex;
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||||
flex-direction: row;
|
||||
justify-content: space-between;
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padding: 1.5rem min(5.5%, 2.5rem) 3rem;
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margin: 0;
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||||
}
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||||
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a {
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||||
color: #1a1a1a;
|
||||
text-decoration: underline;
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||||
text-decoration-color: transparent;
|
||||
transition: text-decoration-color 150ms ease-in-out;
|
||||
}
|
||||
a:hover {
|
||||
color: #000;
|
||||
text-decoration-color: #000;
|
||||
}
|
||||
nav a {
|
||||
font-size: 1.1rem;
|
||||
line-height: 1.6rem;
|
||||
}
|
||||
|
||||
h1 {
|
||||
font-size: 1.25rem;
|
||||
margin: 0;
|
||||
}
|
||||
|
||||
form {
|
||||
align-items: stretch;
|
||||
display: flex;
|
||||
justify-content: center;
|
||||
position: relative;
|
||||
width: 90%;
|
||||
}
|
||||
input[type="search"] {
|
||||
background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'%3E%3C/line%3E%3C/svg%3E");
|
||||
background-repeat: no-repeat;
|
||||
background-position: 1.25rem 50%;
|
||||
border: 0.15rem solid #1a1a1a;
|
||||
border-radius: 2rem;
|
||||
box-shadow: inset 0 0.25rem 0 0 #f0eded;
|
||||
color: #1a1a1a;
|
||||
font-size: 1.25rem;
|
||||
height: 3.6rem;
|
||||
padding: 0 8.5rem 0 3.5rem;
|
||||
transition: box-shadow 150ms ease-in-out;
|
||||
width: 100%;
|
||||
}
|
||||
input[type="search"]:focus {
|
||||
outline: none;
|
||||
box-shadow: inset 0 0.25rem 0 0 #f0eded, 0 0 0 1px #fff, 0 0 0 0.25rem #39b9e4;
|
||||
}
|
||||
button[type="submit"] {
|
||||
background: #fff;
|
||||
border: 0.15rem solid #1a1a1a;
|
||||
border-radius: 0 2rem 2rem 0;
|
||||
box-shadow: inset 0 0.25rem 0 0 #f0eded;
|
||||
color: #1a1a1a;
|
||||
cursor: pointer;
|
||||
height: 100%;
|
||||
font-size: 1.25rem;
|
||||
padding: 0.75rem 2rem 0.8rem 1.75rem;
|
||||
position: absolute;
|
||||
top: 0;
|
||||
transition: background 150ms ease-in-out;
|
||||
right: 0;
|
||||
}
|
||||
button[type="submit"]:hover {
|
||||
background-color: #f0eded;
|
||||
}
|
||||
|
||||
main {
|
||||
align-items: center;
|
||||
align-self: stretch;
|
||||
display: flex;
|
||||
flex-direction: column;
|
||||
justify-content: flex-start;
|
||||
gap: 4rem;
|
||||
padding-top: 2rem;
|
||||
height: 100%;
|
||||
}
|
||||
|
||||
article {
|
||||
width: 86%;
|
||||
}
|
||||
|
||||
aside {
|
||||
width: 86%;
|
||||
}
|
||||
details {
|
||||
margin-bottom: 0.5rem;
|
||||
}
|
||||
summary {
|
||||
cursor: pointer;
|
||||
}
|
||||
summary:hover {
|
||||
color: #000;
|
||||
}
|
||||
details dl {
|
||||
margin: 0.5rem 0 0;
|
||||
padding-left: 1.1rem;
|
||||
}
|
||||
details dl dt {
|
||||
margin: 0 0 0.5rem;
|
||||
}
|
||||
details dl dd {
|
||||
display: none;
|
||||
font-size: 0.875rem;
|
||||
line-height: 1.2rem;
|
||||
margin-left: 0;
|
||||
padding: 0 0 1rem 0.1rem;
|
||||
}
|
||||
details dl input[type="checkbox"] {
|
||||
display: none;
|
||||
}
|
||||
details dl input[type="checkbox"]:checked + dd {
|
||||
display: block;
|
||||
}
|
||||
details[open] + details {
|
||||
margin-top: 1rem;
|
||||
}
|
||||
|
||||
code {
|
||||
font-family: Menlo, monospace;
|
||||
font-size: 0.9rem;
|
||||
background: #fff;
|
||||
padding: 0.1rem 0.2rem;
|
||||
border-radius: 0.25rem;
|
||||
}
|
||||
|
||||
h2 {
|
||||
margin: 0 0 1.5rem;
|
||||
}
|
||||
|
||||
p {
|
||||
line-height: 1.5rem;
|
||||
}
|
||||
p a {
|
||||
font-weight: 600;
|
||||
}
|
||||
p.final {
|
||||
background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='lucide lucide-arrow-right'%3E%3Cpath d='M5 12h14'/%3E%3Cpath d='m12 5 7 7-7 7'/%3E%3C/svg%3E");
|
||||
background-repeat: no-repeat;
|
||||
background-position: 0 0.1rem;
|
||||
font-size: 1.2rem;
|
||||
padding: 0 0 2rem 2rem;
|
||||
word-wrap: anywhere;
|
||||
}
|
||||
|
||||
h3 {
|
||||
margin: 0 0 1.5rem;
|
||||
}
|
||||
p + h3 {
|
||||
margin-top: 2rem;
|
||||
}
|
||||
|
||||
table {
|
||||
border-spacing: 0;
|
||||
padding: 0;
|
||||
width: 100%;
|
||||
}
|
||||
th {
|
||||
border-bottom: 2px solid #1a1a1a;
|
||||
color: #4a4a4a;
|
||||
font-size: 0.9rem;
|
||||
padding: 0 1rem 0.75rem;
|
||||
text-transform: uppercase;
|
||||
text-align: left;
|
||||
}
|
||||
td {
|
||||
background-color: #fafafa;
|
||||
border-bottom: 1px solid #1a1a1a;
|
||||
padding: 1rem;
|
||||
vertical-align: top;
|
||||
word-wrap: anywhere;
|
||||
}
|
||||
tbody tr:nth-child(odd) td {
|
||||
background-color: #fff;
|
||||
}
|
||||
caption {
|
||||
caption-side: bottom;
|
||||
line-height: 1.5rem;
|
||||
padding: 1rem;
|
||||
text-align: left;
|
||||
}
|
||||
|
||||
/* laptop */
|
||||
@media screen and (min-width: 1024px) {
|
||||
menu {
|
||||
padding: 1.5rem 2.5rem 3rem;
|
||||
}
|
||||
h1 {
|
||||
font-size: 1.75rem;
|
||||
}
|
||||
form {
|
||||
width: 75%;
|
||||
}
|
||||
main {
|
||||
align-items: flex-start;
|
||||
flex-direction: row;
|
||||
justify-content: center;
|
||||
gap: 4rem;
|
||||
}
|
||||
article {
|
||||
width: 60%;
|
||||
}
|
||||
aside {
|
||||
width: 20%;
|
||||
}
|
||||
}
|
||||
|
||||
/* desktop */
|
||||
@media screen and (min-width: 1440px) {
|
||||
form {
|
||||
width: 66.6666666667%;
|
||||
}
|
||||
article {
|
||||
width: calc(50% - 5rem);
|
||||
}
|
||||
aside{
|
||||
width: 16.6667%;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue