Function multipartFormDataParser

deps/undici/undici.js:6369–6430

(input, mimeType)

    }
    __name(validateBoundary, "validateBoundary");
    function multipartFormDataParser(input, mimeType) {
      assert(mimeType !== "failure" && mimeType.essence === "multipart/form-data");
      const boundaryString = mimeType.parameters.get("boundary");
      if (boundaryString === void 0) {
        throw parsingError("missing boundary in content-type header");
      }
      const boundary = Buffer.from(`--${boundaryString}`, "utf8");
      const entryList = [];
      const position = { position: 0 };
      const firstBoundaryIndex = input.indexOf(boundary);
      if (firstBoundaryIndex === -1) {
        throw parsingError("no boundary found in multipart body");
      }
      position.position = firstBoundaryIndex;
      while (true) {
        if (input.subarray(position.position, position.position + boundary.length).equals(boundary)) {
          position.position += boundary.length;
        } else {
          throw parsingError("expected a value starting with -- and the boundary");
        }
        if (bufferStartsWith(input, dd, position)) {
          return entryList;
        }
        if (input[position.position] !== 13 || input[position.position + 1] !== 10) {
          throw parsingError("expected CRLF");
        }
        position.position += 2;
        const result = parseMultipartFormDataHeaders(input, position);
        let { name, filename, contentType, encoding } = result;
        position.position += 2;
        let body;
        {
          const boundaryIndex = input.indexOf(boundary.subarray(2), position.position);
          if (boundaryIndex === -1) {
            throw parsingError("expected boundary after body");
          }
          body = input.subarray(position.position, boundaryIndex - 4);
          position.position += body.length;
          if (encoding === "base64") {
            body = Buffer.from(body.toString(), "base64");
          }
        }
        if (input[position.position] !== 13 || input[position.position + 1] !== 10) {
          throw parsingError("expected CRLF");
        } else {
          position.position += 2;
        }
        let value;
        if (filename !== null) {
          contentType ??= "text/plain";
          if (!isAsciiString(contentType)) {
            contentType = "";
          }
          value = new File([body], filename, { type: contentType });
        } else {
          value = decoderIgnoreBOM.decode(Buffer.from(body));
        }
        assert(webidl.is.USVString(name));