base64
base64Encode and base64Decode let you easily decode content with a base64 encoding and vice versa through pipes.
Syntax
base64Decode INPUT
base64Encode INPUT
An example:
base64-input.html
<p>Hello world = {{ "Hello world" | base64Encode }}</p>
<p>SGVsbG8gd29ybGQ = {{ "SGVsbG8gd29ybGQ=" | base64Decode }}</p>
base-64-output.html
<p>Hello world = SGVsbG8gd29ybGQ=</p>
<p>SGVsbG8gd29ybGQ = Hello world</p>
You can also pass other data types as arguments to the template function which tries to convert them. The following will convert 42 from an integer to a string because both base64Encode and base64Decode always return a string.
{{ 42 | base64Encode | base64Decode }}
=> "42" rather than 42
base64 with APIs
Using base64 to decode and encode becomes really powerful if we have to handle responses from APIs.
{{ $resp := getJSON "https://api.github.com/repos/gohugoio/hugo/readme" }}
{{ $resp.content | base64Decode | markdownify }}
The response of the GitHub API contains the base64-encoded version of the README.md in the Hugo repository. Now we can decode it and parse the Markdown. The final output will look similar to the rendered version on GitHub.