hugo/docs/content/en/functions/resources/GetRemote.md at 558f3258a723dca9ef395bcc5e5c3e44fa501688

github/hugo

Fork 0

mirror of https://github.com/gohugoio/hugo.git synced 2024-11-14 20:37:55 -05:00

Bjørn Erik Pedersen d19ed4d4e6

Merge commit '35dec7c96f7ee3eb17dd444f7067f0c776fb56ae'

2023-12-04 15:24:01 +01:00

4.6 KiB

Raw Blame History

title

description

Options

The resources.GetRemote function takes an optional map of options.

{{ $url := "https://example.org/api" }}
{{ $opts := dict
  "headers" (dict "Authorization" "Bearer abcd")
}}
{{ $resource := resources.GetRemote $url $opts }}

If you need multiple values for the same header key, use a slice:

{{ $url := "https://example.org/api" }}
{{ $opts := dict
  "headers" (dict "X-List" (slice "a" "b" "c"))
}}
{{ $resource := resources.GetRemote $url $opts }}

You can also change the request method and set the request body:

{{ $url := "https://example.org/api" }}
{{ $opts := dict
  "method" "post"
  "body" `{"complete": true}` 
  "headers" (dict  "Content-Type" "application/json")
}}
{{ $resource := resources.GetRemote $url $opts }}

Remote data

When retrieving remote data, use the transform.Unmarshal function to unmarshal the response.

{{ $data := "" }}
{{ $url := "https://example.org/books.json" }}
{{ with resources.GetRemote $url }}
  {{ with .Err }}
    {{ errorf "%s" . }}
  {{ else }}
    {{ $data = . | transform.Unmarshal }}
  {{ end }}
{{ else }}
  {{ errorf "Unable to get remote resource %q" $url }}
{{ end }}

Error handling

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.

{{ $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 }}

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 }}

HTTP response

The Data method on a resource returned by the resources.GetRemote function returns information from the HTTP response.

{{ $url := "https://example.org/images/a.jpg" }}
{{ with resources.GetRemote $url }}
  {{ with .Err }}
    {{ errorf "%s" . }}
  {{ else }}
    {{ with .Data }}
      {{ .ContentLength }} → 42764
      {{ .ContentType }} → image/jpeg
      {{ .Status }} → 200 OK
      {{ .StatusCode }} → 200
      {{ .TransferEncoding }} → []
    {{ end }}
  {{ end }}
{{ else }}
  {{ errorf "Unable to get remote resource %q" $url }}
{{ end }}

ContentLength: (int) The content length in bytes.
ContentType: (string) The content type.
Status: (string) The HTTP status text.
StatusCode: (int) The HTTP status code.
TransferEncoding: (string) The transfer encoding.

Caching

Resources returned from resources.GetRemote are cached to disk. See configure file caches for details.

By default, Hugo derives the cache key from the arguments passed to the function, the URL and the options map, if any.

Override the cache key by setting a key in the options map. Use this approach to have more control over how often Hugo fetches a remote resource.

{{ $url := "https://example.org/images/a.jpg" }}
{{ $cacheKey := print $url (now.Format "2006-01-02") }}
{{ $resource := resource.GetRemote $url (dict "key" $cacheKey) }}

4.6 KiB Raw Blame History