Image descriptions in EXIF data with non ASCII characters is missing

[techxplorer]

What version of Hugo are you using (hugo version)?

Hugo Static Site Generator v0.79.1/extended darwin/amd64 BuildDate: unknown
(Installed using homebrew)

Does this issue reproduce with the latest release?

Yes

Description

I'm using Hugo to build a photo gallery website, and using the data in the imagedescription tag in the EXIF data to display a description below the image. I have noticed that images with non ASCII characters in the field have this element missing in the EXIF object.

Steps to reproduce

Use the Exif.Tags.ImageDescription to display the image description in a template with a description like this:

Città del Vaticano #vatican #vaticancity

Observe that the Exif.Tags.ImageDescription variable is empty

Use the same template with an image description like this:

Citta del Vaticano #vatican #vaticancity

Observe that the Exif.Tags.ImageDescription variable contains the description from the image.

Other characters that I've seen that cause this issue are:

“ instead of " or ‘ instead of ' or any emoji character

Additional information

The EXIF tags are being written with version 12 of exiftool

[davidsneighbour]

This might not be a bug, but security features (think of rm -rf in some shellcode). Please have a look at the safe functions in Hugo and if that is unrelated please show a specific layout/template where the procedure breaks:

• https://gohugo.io/functions/safehtmlattr/
• https://gohugo.io/functions/safehtml
• https://gohugo.io/functions/safejs/
• etc

[techxplorer]

Hi @davidsneighbour

Thanks for the quick reply.

A minimal example of the template code that reproduces the issue is as follows:

{{ define "main" }}
  <section>
  {{ with .Resources.ByType "image" }}
    {{ range sort . "Name" "desc" }}
      {{ printf "%+v" .Exif.Tags}}
    {{ end }}
  {{end }}
  </section>
{{ end }}

This, combined with the two attached files, shows the error I'm seeing. The missing-image-description-tag.jpg file will render a list of tags with an empty ImageDescription element.

In contrast the has-image-description-tag.jpg file will render a list of tags that includes a value for the ImageDescription element.

The only difference, that I can see, is that the first file has a description that includes Città and the second has this replaced with Citta

• missing-image-description-tag.jpg
• has-image-description-tag.jpg

[techxplorer]

Hi @bep

I'm not a Go developer so I cannot investigate the code. Is there anything else that I can do to help investigating this issue?

[github-actions]

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