micromark-util-sanitize-uri

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[micromark][] utility to sanitize urls.

Contents

* What is this?
* When should I use this?
* Install
* Use
* API
* normalizeUri(value)
* [sanitizeUri(url[, pattern])](#sanitizeuriurl-pattern)
* Types
* Compatibility
* Security
* Contribute
* License

What is this?

This package exposes an algorithm to make URLs safe.

When should I use this?

This package might be useful when you are making your own micromark extensions.

Install

This package is [ESM only][esm].
In Node.js (version 16+), install with [npm][]:

``sh
npm install micromark-util-sanitize-uri
`

In Deno with [esm.sh][esmsh]:

`js
import {sanitizeUri} from 'https://esm.sh/micromark-util-sanitize-uri@1'
`

In browsers with [esm.sh][esmsh]:

`html

`

Use

`js
import {sanitizeUri} from 'micromark-util-sanitize-uri'

sanitizeUri('https://example.com/a&b') // 'https://example.com/a&b'
sanitizeUri('https://example.com/a%b') // 'https://example.com/a%25b'
sanitizeUri('https://example.com/a%20b') // 'https://example.com/a%20b'
sanitizeUri('https://example.com/👍') // 'https://example.com/%F0%9F%91%8D'
sanitizeUri('https://example.com/', /^https?$/i) // 'https://example.com/'
sanitizeUri('javascript:alert(1)', /^https?$/i) // ''
sanitizeUri('./example.jpg', /^https?$/i) // './example.jpg'
sanitizeUri('#a', /^https?$/i) // '#a'
`

API

This module exports the identifiers [normalizeUri][api-normalize-uri] and
[sanitizeUri][api-sanitize-uri].
There is no default export.

$3

Normalize a URL.

Encode unsafe characters with percent-encoding, skipping already encoded
sequences.

###### Parameters

* value (string)
— URI to normalize

###### Returns

Normalized URI (string).

$3

Make a value safe for injection as a URL.

This encodes unsafe characters with percent-encoding and skips already
encoded sequences (see [normalizeUri][api-normalize-uri]).
Further unsafe characters are encoded as character references (see
[micromark-util-encode][micromark-util-encode]).

A regex of allowed protocols can be given, in which case the URL is sanitized.
For example, /^(https?|ircs?|mailto|xmpp)$/i can be used for a[href], or
/^https?$/i for img[src] (this is what github.com allows).
If the URL includes an unknown protocol (one not matched by protocol, such
as a dangerous example, javascript:), the value is ignored.

###### Parameters

* url (string)
— URI to sanitize
* pattern (RegExp, optional)
— allowed protocols

###### Returns

Sanitized URI (string).

Types

This package is fully typed with [TypeScript][].
It exports no additional types.

Compatibility

Projects maintained by the unified collective are compatible with maintained
versions of Node.js.

When we cut a new major release, we drop support for unmaintained versions of
Node.
This means we try to keep the current release line,
micromark-util-sanitize-uri@2, compatible with Node.js 16.
This package works with micromark@3.

Security

This package is safe.
See [security.md][securitymd] in [micromark/.github][health] for how to
submit a security report.

Contribute

See [contributing.md][contributing] in [micromark/.github][health] for ways
to get started.
See [support.md`][support] for ways to get help.

This project has a [code of conduct][coc].
By interacting with this repository, organisation, or community you agree to
abide by its terms.

License

[MIT][license] © [Titus Wormer][author]

[build-badge]: https://github.com/micromark/micromark/workflows/main/badge.svg

[build]: https://github.com/micromark/micromark/actions

[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark.svg

[coverage]: https://codecov.io/github/micromark/micromark

[downloads-badge]: https://img.shields.io/npm/dm/micromark-util-sanitize-uri.svg

[downloads]: https://www.npmjs.com/package/micromark-util-sanitize-uri

[bundle-size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-util-sanitize-uri

[bundle-size]: https://bundlejs.com/?q=micromark-util-sanitize-uri

[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg

[backers-badge]: https://opencollective.com/unified/backers/badge.svg

[opencollective]: https://opencollective.com/unified

[npm]: https://docs.npmjs.com/cli/install

[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

[esmsh]: https://esm.sh

[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg

[chat]: https://github.com/micromark/micromark/discussions

[license]: https://github.com/micromark/micromark/blob/main/license

[author]: https://wooorm.com

[health]: https://github.com/micromark/.github

[securitymd]: https://github.com/micromark/.github/blob/main/security.md

[contributing]: https://github.com/micromark/.github/blob/main/contributing.md

[support]: https://github.com/micromark/.github/blob/main/support.md

[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md

[typescript]: https://www.typescriptlang.org

[micromark]: https://github.com/micromark/micromark

[micromark-util-encode]: https://github.com/micromark/micromark/tree/main/packages/micromark-util-encode

[api-normalize-uri]: #normalizeurivalue

[api-sanitize-uri]: #sanitizeuriurl-pattern