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68 lines
1.5 KiB
Markdown
68 lines
1.5 KiB
Markdown
---
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title: safe.URL
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description: Declares the given string as a safe URL or URL substring.
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categories: []
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keywords: []
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action:
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aliases: [safeURL]
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related:
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- functions/safe/CSS
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- functions/safe/HTML
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- functions/safe/HTMLAttr
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- functions/safe/JS
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- functions/safe/JSStr
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returnType: template.URL
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signatures: [safe.URL INPUT]
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toc: true
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aliases: [/functions/safeurl]
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---
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## Introduction
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{{% include "functions/_common/go-html-template-package.md" %}}
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## Usage
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Use the `safe.URL` function to encapsulate a known safe URL or URL substring. Schemes other than the following are considered unsafe:
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- `http:`
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- `https:`
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- `mailto:`
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Use of this type presents a security risk: the encapsulated content should come from a trusted source, as it will be included verbatim in the template output.
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See the [Go documentation] for details.
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[Go documentation]: https://pkg.go.dev/html/template#URL
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## Example
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Without a safe declaration:
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```go-html-template
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{{ $href := "irc://irc.freenode.net/#golang" }}
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<a href="{{ $href }}">IRC</a>
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```
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Hugo renders the above to:
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```html
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<a href="#ZgotmplZ">IRC</a>
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```
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{{% note %}}
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`ZgotmplZ` is a special value that indicates that unsafe content reached a CSS or URL context at runtime.
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{{% /note %}}
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To declare the string as safe:
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```go-html-template
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{{ $href := "irc://irc.freenode.net/#golang" }}
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<a href="{{ $href | safeURL }}">IRC</a>
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```
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Hugo renders the above to:
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```html
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<a href="irc://irc.freenode.net/#golang">IRC</a>
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```
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