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136 lines
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136 lines
4 KiB
Text
# micromark-util-sanitize-uri
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[![Build][build-badge]][build]
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[![Coverage][coverage-badge]][coverage]
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[![Downloads][downloads-badge]][downloads]
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[![Size][bundle-size-badge]][bundle-size]
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[![Sponsors][sponsors-badge]][opencollective]
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[![Backers][backers-badge]][opencollective]
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[![Chat][chat-badge]][chat]
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micromark utility to sanitize urls.
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## Contents
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* [Install](#install)
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* [Use](#use)
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* [API](#api)
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* [`sanitizeUri(url[, pattern])`](#sanitizeuriurl-pattern)
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* [Security](#security)
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* [Contribute](#contribute)
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* [License](#license)
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## Install
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[npm][]:
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```sh
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npm install micromark-util-sanitize-uri
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```
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## Use
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```js
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import {sanitizeUri} from 'micromark-util-sanitize-uri'
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sanitizeUri('https://example.com/a&b') // 'https://example.com/a&b'
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sanitizeUri('https://example.com/a%b') // 'https://example.com/a%25b'
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sanitizeUri('https://example.com/a%20b') // 'https://example.com/a%20b'
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sanitizeUri('https://example.com/👍') // 'https://example.com/%F0%9F%91%8D'
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sanitizeUri('https://example.com/', /^https?$/i) // 'https://example.com/'
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sanitizeUri('javascript:alert(1)', /^https?$/i) // ''
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sanitizeUri('./example.jpg', /^https?$/i) // './example.jpg'
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sanitizeUri('#a', /^https?$/i) // '#a'
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```
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## API
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This module exports the following identifiers: `sanitizeUri`.
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There is no default export.
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### `sanitizeUri(url[, pattern])`
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Make a value safe for injection as a URL.
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This encodes unsafe characters with percent-encoding and skips already
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encoded sequences (see `normalizeUri` internally).
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Further unsafe characters are encoded as character references (see
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`micromark-util-encode`).
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A regex of allowed protocols can be given, in which case the URL is sanitized.
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For example, `/^(https?|ircs?|mailto|xmpp)$/i` can be used for `a[href]`, or
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`/^https?$/i` for `img[src]` (this is what `github.com` allows).
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If the URL includes an unknown protocol (one not matched by `protocol`, such
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as a dangerous example, `javascript:`), the value is ignored.
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###### Parameters
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* `url` (`string`) — URI to sanitize.
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* `pattern` (`RegExp`, optional) — Allowed protocols.
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###### Returns
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`string` — Sanitized URI.
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## Security
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See [`security.md`][securitymd] in [`micromark/.github`][health] for how to
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submit a security report.
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## Contribute
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See [`contributing.md`][contributing] in [`micromark/.github`][health] for ways
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to get started.
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See [`support.md`][support] for ways to get help.
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This project has a [code of conduct][coc].
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By interacting with this repository, organisation, or community you agree to
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abide by its terms.
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## License
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[MIT][license] © [Titus Wormer][author]
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<!-- Definitions -->
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[build-badge]: https://github.com/micromark/micromark/workflows/main/badge.svg
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[build]: https://github.com/micromark/micromark/actions
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[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark.svg
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[coverage]: https://codecov.io/github/micromark/micromark
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[downloads-badge]: https://img.shields.io/npm/dm/micromark-util-sanitize-uri.svg
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[downloads]: https://www.npmjs.com/package/micromark-util-sanitize-uri
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[bundle-size-badge]: https://img.shields.io/bundlephobia/minzip/micromark-util-sanitize-uri.svg
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[bundle-size]: https://bundlephobia.com/result?p=micromark-util-sanitize-uri
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[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
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[backers-badge]: https://opencollective.com/unified/backers/badge.svg
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[opencollective]: https://opencollective.com/unified
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[npm]: https://docs.npmjs.com/cli/install
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[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
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[chat]: https://github.com/micromark/micromark/discussions
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[license]: https://github.com/micromark/micromark/blob/main/license
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[author]: https://wooorm.com
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[health]: https://github.com/micromark/.github
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[securitymd]: https://github.com/micromark/.github/blob/HEAD/security.md
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[contributing]: https://github.com/micromark/.github/blob/HEAD/contributing.md
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[support]: https://github.com/micromark/.github/blob/HEAD/support.md
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[coc]: https://github.com/micromark/.github/blob/HEAD/code-of-conduct.md
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