content = "...;charset=Shift_JIS\"...";
        assertEquals("Shift_JIS", htmlTransformer.parseCharset(content));

        content = "...;Charset=Shift_JIS\"...";
        assertEquals("Shift_JIS", htmlTransformer.parseCharset(content));

        content = "...;charset=EUC-JP\"...";
        assertEquals("EUC-JP", htmlTransformer.parseCharset(content));

    }

            final int size = bis.read(buffer);
            if (size != -1) {
                final String content = new String(buffer, 0, size);
                encoding = parseCharset(content);
            }
        } catch (final IOException e) {
            throw new CrawlingAccessException("Could not load a content.", e);
        }

        return normalizeEncoding(encoding);
    }

    }
    MediaType mediaType = new MediaType(type, subtype, builder.build());
    // if the attribute isn't charset, we can just inherit the current parsedCharset
    if (!normalizedAttribute.equals(CHARSET_ATTRIBUTE)) {
      mediaType.parsedCharset = this.parsedCharset;
    }
    // Return one of the constants if the media type is a known type.
    return MoreObjects.firstNonNull(KNOWN_TYPES.get(mediaType), mediaType);
  }