1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
---
title: resources.GetRemote
description: Returns a remote resource from the given URL, or nil if none found.
categories: []
keywords: []
action:
aliases: []
related:
- functions/data/GetCSV
- functions/data/GetJSON
- functions/resources/ByType
- functions/resources/Get
- functions/resources/GetMatch
- functions/resources/Match
- methods/page/Resources
returnType: resource.Resource
signatures: ['resources.GetRemote URL [OPTIONS]']
toc: true
---
```go-html-template
{{ $url := "https://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 }}
```
## Options
The `resources.GetRemote` function takes an optional map of options.
```go-html-template
{{ $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:
```go-html-template
{{ $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:
```go-html-template
{{ $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.
[`transform.Unmarshal`]: /functions/transform/unmarshal
[unmarshal]: /getting-started/glossary/#unmarshal
```go-html-template
{{ $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.
[`Err`]: /methods/resource/err
```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 }}
```
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 }}
```
## HTTP response
The [`Data`] method on a resource returned by the `resources.GetRemote` function returns information from the HTTP response.
[`Data`]: /methods/resource/data
```go-html-template
{{ $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.
```go-html-template
{{ $url := "https://example.org/images/a.jpg" }}
{{ $cacheKey := print $url (now.Format "2006-01-02") }}
{{ $resource := resources.GetRemote $url (dict "key" $cacheKey) }}
```
[configure file caches]: /getting-started/configuration/#configure-file-caches
## Security
To protect against malicious intent, the `resources.GetRemote` function inspects the server response including:
- The [Content-Type] in the response header
- The file extension, if any
- The content itself
If Hugo is unable to resolve the media type to an entry in its [allowlist], the function throws an error:
```text
ERROR error calling resources.GetRemote: failed to resolve media type...
```
For example, you will see the error above if you attempt to download an executable.
Although the allowlist contains entries for common media types, you may encounter situations where Hugo is unable to resolve the media type of a file that you know to be safe. In these situations, edit your site configuration to add the media type to the allowlist. For example:
```text
[security.http]
mediaTypes=['application/vnd\.api\+json']
```
Note that the entry above is:
- An _addition_ to the allowlist; it does not _replace_ the allowlist
- An array of regular expressions
For example, to add two entries to the allowlist:
```text
[security.http]
mediaTypes=['application/vnd\.api\+json','image/avif']
```
[allowlist]: https://en.wikipedia.org/wiki/Whitelist
[Content-Type]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Type
|
