hugo/content/en/methods/resource/Err.md

title	description	categories	keywords	action
Err	Applicable to resources returned by the resources.GetRemote function, returns an error message if the HTTP request fails, else nil.			related returnType signatures functions/resources/GetRemote methods/resource/Data resource.resourceError RESOURCE.Err

The Err method on a resource returned by the resources.GetRemote function returns an error message if the HTTP request fails, else nil. If you do not handle the error yourself, Hugo will fail the build.

In this example we send an HTTP request to a nonexistent domain:

{{ $url := "https://broken-example.org/images/a.jpg" }}
{{ with resources.GetRemote $url }}
  {{ with .Err }}
    {{ errorf "%s" . }}
  {{ else }}
    <img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
  {{ end }}
{{ else }}
  {{ errorf "Unable to get remote resource %q" $url }}
{{ end }}

The code above captures the error from the HTTP request, then fails the build:

ERROR error calling resources.GetRemote: Get "https://broken-example.org/images/a.jpg": dial tcp: lookup broken-example.org on 127.0.0.53:53: no such host

To log an error as a warning instead of an error:

{{ $url := "https://broken-example.org/images/a.jpg" }}
{{ with resources.GetRemote $url }}
  {{ with .Err }}
    {{ warnf "%s" . }}
  {{ else }}
    <img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
  {{ end }}
{{ else }}
  {{ errorf "Unable to get remote resource %q" $url }}
{{ end }}

{{% note %}} An HTTP response with a 404 status code is not an HTTP request error. To handle 404 status codes, code defensively using the nested with-else-end construct as shown above. {{% /note %}}