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/extras/builders | /taxonomies/ordering | Aliases | 10 |
For people migrating existing published content to Hugo, there's a good chance you need a mechanism to handle redirecting old URLs.
Luckily, redirects can be handled easily with aliases in Hugo.
Example
Given a post on your current Hugo site, with a path of:
content/posts/my-awesome-blog-post.md
... you create an "aliases" section in the frontmatter of your post, and add previous paths to that.
TOML frontmatter
+++
...
aliases = [
"/posts/my-original-url/",
"/2010/01/01/even-earlier-url.html"
]
...
+++
YAML frontmatter
---
...
aliases:
- /posts/my-original-url/
- /2010/01/01/even-earlier-url.html
...
---
Now when you visit any of the locations specified in aliases, assuming the same site domain, you'll be redirected to the page they are specified on.
Important Behaviors
-
Hugo makes no assumptions about aliases. They also don't change based on your UglyURLs setting. You need to provide absolute path to your webroot and the complete filename or directory.
-
Aliases are rendered prior to any content and will be overwritten by any content with the same location.
How Hugo Aliases Work
When aliases are specified, Hugo creates a physical folder structure to match the alias entry, and, an html file specifying the canonical URL for the page, and a redirect target.
Assuming a baseurl of mysite.tld, the contents of the html file will look something like:
<!DOCTYPE html>
<html>
<head>
<link rel="canonical" href="http://mysite.tld/posts/my-original-url"/>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta http-equiv="refresh" content="0;url=http://mysite.tld/posts/my-original-url"/>
</head>
</html>
The http-equiv="refresh" line is what performs the redirect, in 0 seconds in this case.