sniffMime method
Sniffs MIME type from content.
Implementation
String? sniffMime(String content) {
// Trim whitespace and comments
content = _trimLeftXmlLike(content);
if (_htmlRegExp.hasMatch(content)) {
return 'text/html';
}
if (_xmlRegExp.hasMatch(content)) {
return 'text/xml';
}
return null;
}