Method parse

guava/src/com/google/common/net/MediaType.java:1102–1138

Parses a media type from its string representation. @throws IllegalArgumentException if the input is not parsable

(String input)

   * @throws IllegalArgumentException if the input is not parsable
   */
  @CanIgnoreReturnValue // TODO(b/219820829): consider removing
  public static MediaType parse(String input) {
    checkNotNull(input);
    Tokenizer tokenizer = new Tokenizer(input);
    try {
      String type = tokenizer.consumeToken(TOKEN_MATCHER);
      consumeSeparator(tokenizer, '/');
      String subtype = tokenizer.consumeToken(TOKEN_MATCHER);
      ImmutableListMultimap.Builder<String, String> parameters = ImmutableListMultimap.builder();
      while (tokenizer.hasMore()) {
        consumeSeparator(tokenizer, ';');
        String attribute = tokenizer.consumeToken(TOKEN_MATCHER);
        consumeSeparator(tokenizer, '=');
        String value;
        if (tokenizer.previewChar() == '"') {
          tokenizer.consumeCharacter('"');
          StringBuilder valueBuilder = new StringBuilder();
          while (tokenizer.previewChar() != '"') {
            if (tokenizer.previewChar() == '\\') {
              tokenizer.consumeCharacter('\\');
              valueBuilder.append(tokenizer.consumeCharacter(ascii()));
            } else {
              valueBuilder.append(tokenizer.consumeToken(QUOTED_TEXT_MATCHER));
            }
          }
          value = valueBuilder.toString();
          tokenizer.consumeCharacter('"');
        } else {
          value = tokenizer.consumeToken(TOKEN_MATCHER);
        }
        parameters.put(attribute, value);
      }
      return create(type, subtype, parameters.build());
    } catch (IllegalStateException e) {
      throw new IllegalArgumentException("Could not parse '" + input + "'", e);
    }
  }

  private static void consumeSeparator(Tokenizer tokenizer, char c) {
    tokenizer.consumeTokenIfPresent(LINEAR_WHITE_SPACE);