Function parseMIMEType

deps/undici/undici.js:4451–4532

(input)

    }
    __name(percentDecode, "percentDecode");
    function parseMIMEType(input) {
      input = removeHTTPWhitespace(input, true, true);
      const position = { position: 0 };
      const type = collectASequenceOfCodePointsFast(
        "/",
        input,
        position
      );
      if (type.length === 0 || !HTTP_TOKEN_CODEPOINTS.test(type)) {
        return "failure";
      }
      if (position.position >= input.length) {
        return "failure";
      }
      position.position++;
      let subtype = collectASequenceOfCodePointsFast(
        ";",
        input,
        position
      );
      subtype = removeHTTPWhitespace(subtype, false, true);
      if (subtype.length === 0 || !HTTP_TOKEN_CODEPOINTS.test(subtype)) {
        return "failure";
      }
      const typeLowercase = type.toLowerCase();
      const subtypeLowercase = subtype.toLowerCase();
      const mimeType = {
        type: typeLowercase,
        subtype: subtypeLowercase,
        /** @type {Map<string, string>} */
        parameters: /* @__PURE__ */ new Map(),
        // https://mimesniff.spec.whatwg.org/#mime-type-essence
        essence: `${typeLowercase}/${subtypeLowercase}`
      };
      while (position.position < input.length) {
        position.position++;
        collectASequenceOfCodePoints(
          // https://fetch.spec.whatwg.org/#http-whitespace
          (char) => HTTP_WHITESPACE_REGEX.test(char),
          input,
          position
        );
        let parameterName = collectASequenceOfCodePoints(
          (char) => char !== ";" && char !== "=",
          input,
          position
        );
        parameterName = parameterName.toLowerCase();
        if (position.position < input.length) {
          if (input[position.position] === ";") {
            continue;
          }
          position.position++;
        }
        if (position.position >= input.length) {
          break;
        }
        let parameterValue = null;