DESCRIPTION

The Web::Encoding::Sniffer class implements various character encoding sniffing alrogithms used within the Web platform.

It implements following variants of sniffing algorithm:

  BOM sniffing only (for JavaScript classic scripts and XHR texts)
  plain text (for text documents)
  HTML
  XHR HTML
  XML
  CSS

This module is intended to be invoked from another modules (rather than applications), such as Web::HTML::Parser, Web::XML::Parser, and Web::CSS::Parser.

SPECIFICATIONS

Encoding Standard <https://encoding.spec.whatwg.org/>.

HTML Standard <https://html.spec.whatwg.org/>.

XMLHttpRequest Standard <https://xhr.spec.whatwg.org/>.

Add XML declaration encoding sniffing <https://github.com/whatwg/html/pull/1752/files> (as of October 2016).

The encoding of the XML and text documents MUST be determined by the encoding sniffing algorithm, with following modifications:

The steps to prescan a byte stream to determine its encoding MUST abort after running steps to extract an encoding from an XML declaration. If those steps return failure, the encoding used MUST be UTF-8.

The steps to prescan a byte stream to determine its encoding MUST return failure.

CSS Syntax Module <https://drafts.csswg.org/css-syntax/>.

AUTHOR

Wakaba <wakaba@suikawiki.org>.

LICENSE

Copyright 2007-2017 Wakaba <wakaba@suikawiki.org>.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.