@stdlib/assert-is-uri

isURI

Test if a value is a URI.

Installation

npm install @stdlib/assert-is-uri

Usage

var isURI = require( '@stdlib/assert-is-uri' );

isURI( value )

Tests if a value is a URI.

var bool = isURI( 'https://google.com' );
// returns true

bool = isURI( 'ftp://ftp.is.co.za/rfc/rfc1808.txt' );
// returns true

bool = isURI( '' );
// returns false

bool = isURI( 'foo' );
// returns false

bool = isURI( null );
// returns false

bool = isURI( NaN );
// returns false

bool = isURI( true );
// returns false

Notes

• For more information regarding the URI scheme, see RFC 3986 and Wikipedia.
• On the distinction between URI, URL, and URN, see The Difference Between URLs and URIs.

Examples

var isURI = require( '@stdlib/assert-is-uri' );

/* Valid */

var bool = isURI( 'http://google.com' );
// returns true

bool = isURI( 'http://localhost/' );
// returns true

bool = isURI( 'http://example.w3.org/path%20with%20spaces.html' );
// returns true

bool = isURI( 'http://example.w3.org/%20' );
// returns true

bool = isURI( 'ftp://ftp.is.co.za/rfc/rfc1808.txt' );
// returns true

bool = isURI( 'ftp://ftp.is.co.za/../../../rfc/rfc1808.txt' );
// returns true

bool = isURI( 'http://www.ietf.org/rfc/rfc2396.txt' );
// returns true

bool = isURI( 'ldap://[2001:db8::7]/c=GB?objectClass?one' );
// returns true

bool = isURI( 'mailto:[e-mail]' );
// returns true

bool = isURI( 'news:comp.infosystems.www.servers.unix' );
// returns true

bool = isURI( 'tel:[phone]' );
// returns true

bool = isURI( 'telnet://192.0.2.16:80/' );
// returns true

bool = isURI( 'urn:oasis:names:specification:docbook:dtd:xml:4.1.2' );
// returns true

/* Invalid */

// No scheme:
bool = isURI( '' );
// returns false

// No scheme:
bool = isURI( 'foo' );
// returns false

// No scheme:
bool = isURI( 'foo@bar' );
// returns false

// No scheme:
bool = isURI( '://foo/' );
// returns false

// Illegal characters:
bool = isURI( 'http://<foo>' );
// returns false

// Invalid path:
bool = isURI( 'http:////foo.html' );
// returns false

// Incomplete hex escapes...
bool = isURI( 'http://example.w3.org/%a' );
// returns false

bool = isURI( 'http://example.w3.org/%a/foo' );
// returns false

bool = isURI( 'http://example.w3.org/%at' );
// returns false

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CLI

Installation

To use the module as a general utility, install the module globally

npm install -g @stdlib/assert-is-uri

Usage

Usage: is-uri [options] [<uri>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.

Examples

$ is-uri http://google.com
true

To use as a standard stream,

$ echo -n 'http://google.com' | is-uri
true

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Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.