code: protected String getCharsetFromMeta(byte buffer[],int len) throws IOException {
  		String charsetName = null;
  
  		// convert to UTF-8 String -- which hopefully will not mess up the
  		// characters we're interested in...
  		String sample = new String(buffer,0,len,DEFAULT_CHARSET);
  		String metaContentType = findMetaContentType(sample);
  		if(metaContentType != null) {
  			charsetName = contentTypeToCharset(metaContentType);
  		}
  		return charsetName;
  	}
docs: Attempt to find a META tag in the HTML that hints at the character set
  used to write the document.
  
  @param resource
  @return String character set found from META tags in the HTML
  @throws IOException