Provided by: libwebservice-validator-css-w3c-perl_0.3-1_all 
NAME
WebService::Validator::CSS::W3C - Interface to the W3C CSS Validator
SYNOPSIS
use WebService::Validator::CSS::W3C;
my $css = "p { color: not-a-color }";
my $val = WebService::Validator::CSS::W3C->new;
my $ok = $val->validate(string => $css);
if ($ok and !$val->is_valid) {
print "Errors:\n";
printf " * %s\n", $_->{message}
foreach $val->errors
}
DESCRIPTION
This module is an interface to the W3C CSS Validation online service
http://jigsaw.w3.org/css-validator/ <http://jigsaw.w3.org/css-validator/>, based on its
SOAP 1.2 support. It helps to find errors in Cascading Style Sheets.
The following methods are available:
my $val = WebService::Validator::CSS::W3C->new
my $val = WebService::Validator::CSS::W3C->new($ua)
my $val = WebService::Validator::CSS::W3C->new($ua, $url)
Creates a new WebService::Validator::CSS::W3C object. A custom LWP::UserAgent object
can be supplied which is then used for HTTP communication with the CSS Validator. $url
is the URL of the CSS Validator, "http://jigsaw.w3.org/css-validator/validator" by
default.
my $success = $val->validate(%params)
Validate a style sheet, takes %params as defined below. Either "string" or "uri" must
be supplied. Returns a true value if the validation succeeded (regardless of whether
the style sheet contains errors).
string => $css
A style sheet as a string. It is currently unlikely that validation will work if
the string is not a legal UTF-8 string. If a string is specified, the "uri"
parameter will be ignored. Note that "GET" will be used to pass the string to the
Validator, it might not work with overly long strings.
uri => $uri
The location of a style sheet or a HTML/XHTML/SVG document containing or
referencing style sheets.
medium => "print"
The medium for which the style sheet should apply, one of "aural", "braille",
"embossed", "handheld", "print", "screen", "tty", "tv", and "presentation". A
special value "all" can also be specified. The default is "undef" in which case
the CSS Validator determines a value; this would currently be as if "all" had been
specified.
profile => "css3"
The CSS Version or profile to validate against, legal values are "css1", "css2",
"css21", "css3", "svg", "svgbasic", "svgtiny", "mobile", "atsc-tv", and "tv". A
special value "none" can also be used. The default is "undef" in which case the
CSS Validator determines a default.
warnings => 2
Either "no" or an integer 0 - 2 that determines how many warning messages you want
to get back from the CSS Validator. "no" means no warning, 0 means only the most
serious warnings, and 2 will give all warnings, including low level ones. The
defaut is "undef" in which case the CSS Validator determines a default value; this
is expected to be as if 1 had been specified.
language => "de"
The desired language of the supposedly human-readable messages. The string will
passed as an "Accept-Language" header in the HTTP request. The CSS Validator
currently supports "en", "de", "fr", "ja", "nl", "zh", and "zh-cn".
my $success = $val->success
Same as the return value of "validate()".
my $is_valid = $val->is_valid
Returns a true value if the last attempt to "validate()" succeeded and the validator
reported no errors in the style sheet.
my $num_errors = $val->errorcount
returns the number of errors found for the checked style sheet. Get the details of
the errors with $val->errors (see below).
my @errors = $val->errors
Returns a list with information about the errors found for the style sheet. An error
is a hash reference; the example in the synopsis would currently return something like
( {
context => 'p',
property => 'color',
expression => { start => '', end => 'not-a-color' }
errortype => 'parse-error',
message => 'not-a-color is not a color value',
line => 0,
} )
my $num_warnings = $val->warningcount
returns the number of warnings found for the checked style sheet. Get the details of
each warning with $val->warnings (see below).
my @warnings = $val->warnings
Returns a list with information about the warnings found for the style sheet.
my $ua = $val->user_agent
my $ua = $val->user_agent($new_ua)
The LWP::UserAgent object you supplied to the constructor or a custom object created
at construction time you can manipulate.
# set timeout to 30 seconds
$val->user_agent->timeout(30);
You can also supply a new object to replace the old one.
my $uri = $val->validator_uri
my $uri = $val->validator_uri($validator_uri)
Gets or sets the URI of the validator. If you did not specify a custom URI,
"http://jigsaw.w3.org/css-validator/validator" by default.
my $response = $val->response
The HTTP::Response object returned from the last request. This is useful to determine
why validation might have failed.
if (!$val->validate(string => $css)) {
if (!$val->response->is_success) {
print $val->response->message, "\n"
}
}
my $uri = $val->request_uri
The URI object used for the last request.
my $som = $val->som
The SOAP::SOM object for the last successful deserialization, check the return value
of "validate()" or "success()" before using the object.
BUGS
This module uses the SOAP interface for the W3C CSS validatom, which still has a number of
bugs, tracked via W3C's Bugzilla, <http://www.w3.org/Bugs/Public/>.
Please report bugs in the W3C CSS Validator to www-validator-css@w3.org or enter them
directly in Bugzilla (see above). Please report bugs in this module via RT,
<http://rt.cpan.org/>.
NOTE
This module is not directly associated with the W3C. Please remember that the CSS
Validator is a shared resource so do not abuse it: you should sleep between requests, and
consider installing the Validator locally, see
http://jigsaw.w3.org/css-validator/DOWNLOAD.html <http://jigsaw.w3.org/css-
validator/DOWNLOAD.html>.
AUTHOR / COPYRIGHT / LICENSE
Copyright 2004-2013 Bjoern Hoehrmann <bjoern@hoehrmann.de>.
This module is licensed under the same terms as Perl itself.