mirror of https://github.com/gohugoio/hugo
57 lines
1.8 KiB
Markdown
57 lines
1.8 KiB
Markdown
---
|
|
title: Err
|
|
description: Applicable to resources returned by the resources.GetRemote function, returns an error message if the HTTP request fails, else nil.
|
|
categories: []
|
|
keywords: []
|
|
action:
|
|
related:
|
|
- functions/resources/GetRemote
|
|
- methods/resource/Data
|
|
returnType: resource.resourceError
|
|
signatures: [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.
|
|
|
|
[`resources.GetRemote`]: /functions/resources/getremote/
|
|
|
|
In this example we send an HTTP request to a nonexistent domain:
|
|
|
|
```go-html-template
|
|
{{ $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:
|
|
|
|
```text
|
|
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:
|
|
|
|
```go-html-template
|
|
{{ $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 %}}
|