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57 lines
1.8 KiB
Markdown
57 lines
1.8 KiB
Markdown
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---
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title: Err
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description: Applicable to resources returned by the resources.GetRemote function, returns an error message if the HTTP request fails, else nil.
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categories: []
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keywords: []
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action:
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related:
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- functions/resources/GetRemote
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- methods/resource/Data
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returnType: resource.resourceError
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signatures: [RESOURCE.Err]
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---
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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.
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[`resources.GetRemote`]: functions/resources/getremote
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In this example we send an HTTP request to a nonexistent domain:
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```go-html-template
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{{ $url := "https://broken-example.org/images/a.jpg" }}
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{{ with resources.GetRemote $url }}
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{{ with .Err }}
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{{ errorf "%s" . }}
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{{ else }}
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<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
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{{ end }}
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{{ else }}
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{{ errorf "Unable to get remote resource %q" $url }}
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{{ end }}
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```
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The code above captures the error from the HTTP request, then fails the build:
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```text
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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
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```
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To log an error as a warning instead of an error:
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```go-html-template
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{{ $url := "https://broken-example.org/images/a.jpg" }}
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{{ with resources.GetRemote $url }}
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{{ with .Err }}
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{{ warnf "%s" . }}
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{{ else }}
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<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt="">
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{{ end }}
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{{ else }}
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{{ errorf "Unable to get remote resource %q" $url }}
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{{ end }}
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```
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{{% note %}}
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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.
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{{% /note %}}
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