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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 name="viewport" content="width=device-width" />
<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>
<body>
<h1>Reimar's articles</h1>
<p>This is where I publish my writings.</p>
<br>
<br />
<ul>
<li>
<time>2025-08-02</time> &mdash; <a href="upgrade-insecure-requests.html">Handling the Upgrade-Insecure-Requests header in nginx</a>
</li>
</ul>
<br />
<a href="atom.xml">Atom feed</a>
</body>
</html>

16
static/upgrade-insecure-requests.html
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@ -6,10 +6,14 @@
<meta name="viewport" content="width=device-width" />
<title>Handling the Upgrade-Insecure-Requests header in nginx</title>
<link rel="stylesheet" href="assets/style.css" />
<link rel="alternate" href="atom.xml" type="application/atom+xml" />
</head>
<body>
<header>
<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>
Today it is considered a de facto security standard for the
web, that all HTTP requests automatically be redirected to
@ -37,12 +41,12 @@
<fieldset class="table-of-contents">
<legend>Table of contents</legend>
<a href="#configuring">Configuring nginx</a><br>
<a href="#cloudflare">Using Cloudflare</a><br>
<a href="#configuring">Configuring nginx</a><br />
<a href="#cloudflare">Using Cloudflare</a><br />
<a href="#testing">Testing the configuration</a>
</fieldset>
<h2 id="configuring"><a href="#configuring">Configuring nginx</a></h2>
<h2 id="configuring">Configuring nginx</h2>
<p>
In its essence, the configuration is very simple: For every
request, we want to check if the scheme is <code>http</code>
@ -105,7 +109,7 @@ server {
}
}</pre>
<h2 id="cloudflare"><a href="#cloudflare">Using Cloudflare</a></h2>
<h2 id="cloudflare">Using Cloudflare</h2>
<p>
If you are using Cloudflare, you will have to make some
changes to this configuration. In this case, all requests
@ -138,7 +142,7 @@ map "$http_cf_visitor+$http_upgrade_insecure_requests" $upgrade {
completely disabled.
</p>
<h2 id="testing"><a href="#testing">Testing the configuration</a></h2>
<h2 id="testing">Testing the configuration</h2>
<p>
You can use curl to make sure the configuration works
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.
</p>
<footer>
<p><a href="index.html">Back</a></p>
</footer>
</body>
</html>