new

    my $v = WebService::Validator::HTML::W3C->new();

Returns a new instance of the WebService::Validator::HTML::W3C object.

There are various options that can be set when creating the Validator object like so:

    my $v = WebService::Validator::HTML::W3C->new( http_timeout => 20 );

validator_uri

The URI of the validator to use. By default this accesses the W3Cs validator at http://validator.w3.org/check. If you have a local installation of the validator ( recommended if you wish to do a lot of testing ) or wish to use a validator at another location then you can use this option. Please note that you need to use the full path to the validator cgi.

ua

The user agent to use. Should be an LWP::UserAgent object or something that provides the same interface. If this argument is provided, the "http_timeout" and "proxy" arguments are ignored.

http_timeout

How long (in seconds) to wait for the HTTP connection to timeout when contacting the validator. By default this is 30 seconds.

detailed

This fetches the XML response from the validator in order to provide information for the errors method. You should set this to true if you intend to use the errors method.

proxy

An HTTP proxy to use when communicating with the validation service.

output

Controls which output format is used. Can be either xml or soap12.

The default is soap12 as the XML format is deprecated and is likely to be removed in the future.

The default will always work so unless you're using a locally installed Validator you can safely ignore this.

validate

    $v->validate( 'http:://www.example.com/' );

Validate a URI. Returns 0 if the validation fails (e.g if the validator cannot be reached), otherwise 1.

validate_file

    $v->validate_file( './file.html' );

Validate a file by uploading it to the W3C Validator. NB This has only been tested on a Linux box so may not work on non unix machines.

validate_markup

    $v->validate_markup( $markup );

Validate a scalar containing HTML.

Alternate interface

        $v->validate( uri => 'http://example.com/' );
        $v->validate( string => $markup );
        $v->validate( file => './file.html' );

is_valid

    $v->is_valid;

Returns true (1) if the URI validated otherwise 0.

uri

    $v->uri();

Returns the URI of the last page on which validation succeeded.

num_errors

    $num_errors = $v->num_errors();

Returns the number of errors that the validator encountered.

errorcount

warningcount

    $num_errors = $v->warningcount();

Returns the number of warnings that the validator encountered.

errors

    $errors = $v->errors();
    
    foreach my $err ( @$errors ) {
        printf("line: %s, col: %s\n\terror: %s\n", 
                $err->line, $err->col, $err->msg);
    }

Returns an array ref of WebService::Validator::HTML::W3C::Error objects. These have line, col and msg methods that return a line number, a column in that line and the error that occurred at that point.

Note that you need XML::XPath for this to work and you must have initialised WebService::Validator::HTML::W3C with the detailed option. If you have not set the detailed option a warning will be issued, the detailed option will be set and a second request made to the validator in order to fetch the required information.

If there was a problem processing the detailed information then this method will return 0.

warnings

    $warnings = $v->warnings();

Works exactly the same as errors only returns an array ref of WebService::Validator::HTML::W3C::Warning objects. In all other respects it's the same.

validator_error

    $error = $v->validator_error();

Returns a string indicating why validation may not have occurred. This is not the reason that a webpage was invalid. It is the reason that no meaningful information about the attempted validation could be obtained. This is most likely to be an HTTP error

Possible values are:

You need to supply a URI to validate

You didn't pass a URI to the validate method

You need to supply a URI with a scheme

The URI you passed to validate didn't have a scheme on the front. The W3C validator can't handle URIs like www.example.com but instead needs URIs of the form http://www.example.com/.

Not a W3C Validator or Bad URI

The URI did not return the headers that WebService::Validator::HTML::W3C relies on so it is likely that there is not a W3C Validator at that URI. The other possibility is that it didn't like the URI you provided. Sadly the Validator doesn't give very useful feedback on this at the moment.

Could not contact validator

WebService::Validator::HTML::W3C could not establish a connection to the URI.

Did not get a sensible result from the validator

Should never happen and most likely indicates a problem somewhere but on the off chance that WebService::Validator::HTML::W3C is unable to make sense of the response from the validator you'll get this error.

Result format does not appear to be SOAP|XML

If you've asked for detailed results and the reponse from the validator isn't in the expected format then you'll get this error. Most likely to happen if you ask for SOAP output from a validator that doesn't support that format.

You need to provide a uri, string or file to validate

You've passed in a hash ( or in fact more than one argument ) to validate but the hash does not contain one of the three expected keys.

validator_uri

    $uri = $v->validator_uri();
    $v->validator_uri('http://validator.w3.org/check');

Returns or sets the URI of the validator to use. Please note that you need to use the full path to the validator cgi.

http_timeout

    $timeout = $v->http_timeout();
    $v->http_timeout(10);

Returns or sets the timeout for the HTTP request.