144 lines
4.1 KiB
PHP
144 lines
4.1 KiB
PHP
<?php
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include('class.php');
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include('search.php');
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include('codes.php');
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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>Follow <span>URL Redirect Checker</span></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="/" type="application/x-www-form-urlencoded">
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<input type="url" 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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// error message display
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if (isset($error))
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{
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}
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// if we have a valid request object
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if (isset($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' : $steps.' redirects';
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echo "
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<article>
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<h2>Final destination</h2>
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<p>The URL you traced had ".$count." and ended here:</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>Redirect trace</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 colspan=\"2\">Code</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 = ($step['next']) ? '⥂⇄↩︎' : '✓';
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echo "
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<tr>
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<td>".$item."</td>
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<td>".$url." <a href=\"".$url."\" target=\"blank\"><b>↗︎</b></a></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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<?php
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if (isset($codes) && is_array($codes) && !empty($codes))
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{
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foreach ($codes as $group)
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{
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echo "
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<details>
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<summary>
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".$group['label']." (<code>".$group['start']."</code>–<code>".$group['range']."</code>)
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</summary>
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<dl>";
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foreach ($group['codes'] as $code => $prop)
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{
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echo "
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<!-- ".$code." -->
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<dt>
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<label for=\"".$code."\"><code>".$code."</code> ".$prop['name']."</label>
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</dt>
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<input type=\"checkbox\" id=\"".$code."\">
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<dd>".$prop['desc']."</dd>";
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}
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echo "
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</dl>
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</details>";
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}
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}
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?>
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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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