博客功能更新 2025 (2)

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之前我一直使用 xml-sitemaps 手动生成sitemap.xml，但每当 URL 新增或变更都需要手动提交。实在麻烦！所以，今日用 Liquid 实现自动生成，一劳永逸

sitemap.xml 优化策略

---
layout: null
---
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  {% assign now = site.time | date: "%s" | plus: 0 %}


  {% for page in site.pages %}
    {% if page.url == "/" %}
    <!-- 首页优先级最高 -->
      {% assign page_priority = "1.0" %}
    {% else %}
      {% assign page_priority = "0.8" %}
    {% endif %}


    <url>
      <loc>{{ site.url }}{{ page.url | replace:'index.html','' }}</loc>
      <lastmod>{{ site.time | date_to_xmlschema }}</lastmod>
      <changefreq>weekly</changefreq>
      <priority>{{ page_priority }}</priority>
    </url>
  {% endfor %}


  <!-- 根据发布时间动态调整 priority 和 changefreq -->
  {% for post in site.posts %}
    {% assign post_time = post.date | date: "%s" | plus: 0 %}
    {% assign diff = now | minus: post_time %}
    {% assign days_old = diff | divided_by: 86400 %}


    {% if days_old < 30 %}
      {% assign priority = "0.9" %}
      {% assign changefreq = "daily" %}
    {% elsif days_old < 180 %}
      {% assign priority = "0.8" %}
      {% assign changefreq = "weekly" %}
    {% elsif days_old < 365 %}
      {% assign priority = "0.6" %}
      {% assign changefreq = "monthly" %}
    {% elsif days_old < 730 %}
      {% assign priority = "0.4" %}
      {% assign changefreq = "yearly" %}
    {% else %}
      {% assign priority = "0.2" %}
      {% assign changefreq = "never" %}
    {% endif %}


    <url>
      <loc>{{ site.url }}{{ post.url }}</loc>
      <lastmod>{{ post.date | date_to_xmlschema }}</lastmod>
      <changefreq>{{ changefreq }}</changefreq>
      <priority>{{ priority }}</priority>
    </url>
  {% endfor %}
</urlset>

sitemap.txt 兼容旧版爬虫

sitemap.txt 适用于不支持 XML 的搜索引擎（如某些旧版爬虫）

---
layout: null
permalink: /sitemap.txt
---
{% for page in site.pages %}
{{ site.url }}{{ page.url | replace:'index.html','' }}
{% endfor %}


{% for post in site.posts %}
{{ site.url }}{{ post.url }}
{% endfor %}

在 robots.txt 里声明 Sitemap

确保搜索引擎能找到 Sitemap，需要在 robots.txt 文件中声明 sitemap.xml 和 sitemap.txt

User-agent: *
Allow: /


User-agent: MJ12bot
Disallow: /
User-agent: AhrefsBot
Disallow: /
User-agent: SemrushBot
Disallow: /
User-agent: dotbot
Disallow: /


Sitemap: https://lhasa.icu/sitemap.xml
Sitemap: https://lhasa.icu/sitemap.txt
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1月26日 博客功能更新记录