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URI validation functions
==
[](https://travis-ci.org/ogt/valid-url)
## Synopsis
Common url validation methods
```
var validUrl = require('valid-url');
if (validUrl.isUri(suspect)){
console.log('Looks like an URI');
} else {
console.log('Not a URI');
}
```
Replicates the functionality of Richard Sonnen <sonnen@richardsonnen.com> perl module :
http://search.cpan.org/~sonnen/Data-Validate-URI-0.01/lib/Data/Validate/URI.pm [full code here](http://anonscm.debian.org/gitweb/?p=users/dom/libdata-validate-uri-perl.git)
into a nodejs module. Translated practically line by line from perl.
It passes all the original tests.
## Description
(copied from original perl module)
> This module collects common URI validation routines to make input validation, and untainting easier and more readable.
> All functions return an untainted value if the test passes, and undef if it fails. This means that you should always check for a defined status explicitly. Don't assume the return will be true.
> The value to test is always the first (and often only) argument.
> There are a number of other URI validation modules out there as well (see below.) This one focuses on being fast, lightweight, and relatively 'real-world'. i.e. it's good if you want to check user input, and don't need to parse out the URI/URL into chunks.
> Right now the module focuses on HTTP URIs, since they're arguably the most common. If you have a specialized scheme you'd like to have supported, let me know.
## Installation
```
npm install valid-url
```
## Methods
```javascript
/*
* @Function isUri(value)
*
* @Synopsis is the value a well-formed uri?
* @Description
Returns the untainted URI if the test value appears to be well-formed. Note that
you may really want one of the more practical methods like is_http_uri or is_https_uri,
since the URI standard (RFC 3986) allows a lot of things you probably don't want.
* @Arguments
* value The potential URI to test.
*
* @Returns The untainted RFC 3986 URI on success, undefined on failure.
* @Notes
This function does not make any attempt to check whether the URI is accessible
or 'makes sense' in any meaningful way. It just checks that it is formatted
correctly.
*
*/
/*
* @Function isHttpUri(value)
* @Synopsis is the value a well-formed HTTP uri?
* @Description
Specialized version of isUri() that only likes http:// urls. As a result, it can
also do a much more thorough job validating. Also, unlike isUri() it is more
concerned with only allowing real-world URIs through. Things like relative
hostnames are allowed by the standards, but probably aren't wise. Conversely,
null paths aren't allowed per RFC 2616 (should be '/' instead), but are allowed
by this function.
This function only works for fully-qualified URIs. /bob.html won't work.
See RFC 3986 for the appropriate method to turn a relative URI into an absolute
one given its context.
Returns the untainted URI if the test value appears to be well-formed.
Note that you probably want to either call this in combo with is_https_uri(). i.e.
if(isHttpUri(uri) || isHttpsUri(uri)) console.log('Good');
or use the convenience method isWebUri which is equivalent.
* @Arguments
* value The potential URI to test.
*
* @Returns The untainted RFC 3986 URI on success, undefined on failure.
* @Notes
This function does not make any attempt to check whether the URI is accessible
or 'makes sense' in any meaningful way. It just checks that it is formatted
correctly.
*/
/*
* @Function isHttpsUri(value)
* @Synopsis is the value a well-formed HTTPS uri?
* @Description
See is_http_uri() for details. This version only likes the https URI scheme.
Otherwise it's identical to is_http_uri()
* @Arguments
* value The potential URI to test.
*
* @Returns The untainted RFC 3986 URI on success, undefined on failure.
* @Notes
This function does not make any attempt to check whether the URI is accessible
or 'makes sense' in any meaningful way. It just checks that it is formatted
correctly.
*/
/*
* @Function isWebUri(value)
* @Synopsis is the value a well-formed HTTP or HTTPS uri?
* @Description
This is just a convenience method that combines isHttpUri and isHttpsUri
to accept most common real-world URLs.
* @Arguments
* value The potential URI to test.
*
* @Returns The untainted RFC 3986 URI on success, undefined on failure.
* @Notes
This function does not make any attempt to check whether the URI is accessible
or 'makes sense' in any meaningful way. It just checks that it is formatted
correctly.
*/
```
## See also
RFC 3986, RFC 3966, RFC 4694, RFC 4759, RFC 4904
Kontol Shell Bypass