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Implement atom feed generator

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Reimar 2025-08-03 17:24:16 +02:00
parent 72fbff60ec
commit e48d16df44
Signed by: Reimar
GPG Key ID: 93549FA07F0AE268
4 changed files with 123 additions and 10 deletions
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2
.gitignore vendored Normal file
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@ -0,0 +1,2 @@
static/atom.xml

98
generate-feed.php Normal file
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@ -0,0 +1,98 @@
#!/usr/bin/env php
<?php
function set_attr($xml, $name, $value) {
xmlwriter_start_attribute($xml, $name);
xmlwriter_text($xml, $value);
xmlwriter_end_attribute($xml);
}
function add_elem($xml, $tag, $content, $attributes = []) {
xmlwriter_start_element($xml, $tag);
foreach ($attributes as $name=>$value) {
set_attr($xml, $name, $value);
}
if ($content) xmlwriter_text($xml, $content);
xmlwriter_end_element($xml);
}
$xml = xmlwriter_open_uri(__DIR__ . "/static/atom.xml");
xmlwriter_set_indent($xml, true);
xmlwriter_set_indent_string($xml, "\t");
xmlwriter_start_document($xml, "1.0", "utf-8");
xmlwriter_start_element($xml, "feed");
set_attr($xml, "xmlns", "http://www.w3.org/2005/Atom");
add_elem($xml, "title", "Reimar's articles");
add_elem($xml, "id", "https://reim.ar/");
xmlwriter_start_element($xml, "author");
add_elem($xml, "name", "Reimar");
add_elem($xml, "email", "mail@reim.ar");
add_elem($xml, "uri", "https://reim.ar");
xmlwriter_end_element($xml);
add_elem($xml, "link", null, ["href" => "https://articles.reim.ar"]);
add_elem($xml, "link", null, ["rel" => "self", "href" => "https://articles.reim.ar/atom.xml"]);
$updated = 0;
$entries = [];
foreach (scandir(__DIR__ . "/static") as $file) {
$path = __DIR__ . "/static/" . $file;
if (is_dir($path) || !str_ends_with($path, ".html")) continue;
$doc = new DOMDocument();
$doc->load($path);
$xpath = new DOMXPath($doc);
$author = $xpath->query("//meta[@name='author']");
if (!count($author)) continue;
$published = $xpath->query("//*[@class='published']/time")[0]->attributes["datetime"]->value;
$published = date("c", strtotime($published));
$updated = max($updated, strtotime($published));
$title = $doc->getElementsByTagName("title")[0]->textContent;
$doc->getElementsByTagName("header")[0]->remove();
$doc->getElementsByTagName("footer")[0]->remove();
$content = $doc->saveXML($doc->getElementsByTagName("body")[0]);
$content = str_replace(["<body>", "</body>"], "", $content);
$entries[] = [
"file" => $file,
"title" => $title,
"published" => $published,
"content" => $content,
];
}
add_elem($xml, "updated", date("c", $updated));
foreach ($entries as $entry) {
xmlwriter_start_element($xml, "entry");
add_elem($xml, "id", "https://articles.reim.ar/" . $entry["file"]);
add_elem($xml, "link", null, [
"rel" => "alternate",
"href" => "https://articles.reim.ar/" . $entry["file"],
"type" => "text/html",
]);
add_elem($xml, "title", $entry["title"]);
add_elem($xml, "published", $entry["published"]);
add_elem($xml, "updated", $entry["published"]);
add_elem($xml, "content", $entry["content"], ["type" => "html"]);
xmlwriter_end_element($xml);
}
xmlwriter_end_document($xml);
xmlwriter_flush($xml);

11
static/index.html
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@ -4,17 +4,24 @@
<meta charset="UTF-8" /> <meta charset="UTF-8" />
<meta name="viewport" content="width=device-width" /> <meta name="viewport" content="width=device-width" />
<title>Reimar's articles</title> <title>Reimar's articles</title>
<link rel="stylesheet" href="assets/style.css"> <link rel="stylesheet" href="assets/style.css" />
<link rel="alternate" href="atom.xml" type="application/atom+xml" />
</head> </head>
<body> <body>
<h1>Reimar's articles</h1> <h1>Reimar's articles</h1>
<p>This is where I publish my writings.</p> <p>This is where I publish my writings.</p>
<br>
<br />
<ul> <ul>
<li> <li>
<time>2025-08-02</time> &mdash; <a href="upgrade-insecure-requests.html">Handling the Upgrade-Insecure-Requests header in nginx</a> <time>2025-08-02</time> &mdash; <a href="upgrade-insecure-requests.html">Handling the Upgrade-Insecure-Requests header in nginx</a>
</li> </li>
</ul> </ul>
<br />
<a href="atom.xml">Atom feed</a>
</body> </body>
</html> </html>

22
static/upgrade-insecure-requests.html
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@ -6,10 +6,14 @@
<meta name="viewport" content="width=device-width" /> <meta name="viewport" content="width=device-width" />
<title>Handling the Upgrade-Insecure-Requests header in nginx</title> <title>Handling the Upgrade-Insecure-Requests header in nginx</title>
<link rel="stylesheet" href="assets/style.css" /> <link rel="stylesheet" href="assets/style.css" />
<link rel="alternate" href="atom.xml" type="application/atom+xml" />
</head> </head>
<body> <body>
<h1>Handling the Upgrade-Insecure-Requests header in nginx</h1> <header>
<span class="published">Published on <time datetime="2025-08-02">August 2nd, 2025</time></span> <h1>Handling the Upgrade-Insecure-Requests header in nginx</h1>
<span class="published">Published on <time datetime="2025-08-02">August 2nd, 2025</time></span>
</header>
<p> <p>
Today it is considered a de facto security standard for the Today it is considered a de facto security standard for the
web, that all HTTP requests automatically be redirected to web, that all HTTP requests automatically be redirected to
@ -37,12 +41,12 @@
<fieldset class="table-of-contents"> <fieldset class="table-of-contents">
<legend>Table of contents</legend> <legend>Table of contents</legend>
<a href="#configuring">Configuring nginx</a><br> <a href="#configuring">Configuring nginx</a><br />
<a href="#cloudflare">Using Cloudflare</a><br> <a href="#cloudflare">Using Cloudflare</a><br />
<a href="#testing">Testing the configuration</a> <a href="#testing">Testing the configuration</a>
</fieldset> </fieldset>
<h2 id="configuring"><a href="#configuring">Configuring nginx</a></h2> <h2 id="configuring">Configuring nginx</h2>
<p> <p>
In its essence, the configuration is very simple: For every In its essence, the configuration is very simple: For every
request, we want to check if the scheme is <code>http</code> request, we want to check if the scheme is <code>http</code>
@ -105,7 +109,7 @@ server {
} }
}</pre> }</pre>
<h2 id="cloudflare"><a href="#cloudflare">Using Cloudflare</a></h2> <h2 id="cloudflare">Using Cloudflare</h2>
<p> <p>
If you are using Cloudflare, you will have to make some If you are using Cloudflare, you will have to make some
changes to this configuration. In this case, all requests changes to this configuration. In this case, all requests
@ -138,7 +142,7 @@ map "$http_cf_visitor+$http_upgrade_insecure_requests" $upgrade {
completely disabled. completely disabled.
</p> </p>
<h2 id="testing"><a href="#testing">Testing the configuration</a></h2> <h2 id="testing">Testing the configuration</h2>
<p> <p>
You can use curl to make sure the configuration works You can use curl to make sure the configuration works
properly. The <code>--head</code> option sends a properly. The <code>--head</code> option sends a
@ -160,6 +164,8 @@ curl --head http://example.com --header "Upgrade-Insecure-Requests: 1"</pre>
sure it also returns 200. sure it also returns 200.
</p> </p>
<p><a href="index.html">Back</a></p> <footer>
<p><a href="index.html">Back</a></p>
</footer>
</body> </body>
</html> </html>