Function processHeader

deps/undici/undici.js:3046–3125

(request, key, val)

      }
    };
    function processHeader(request, key, val) {
      if (val && (typeof val === "object" && !Array.isArray(val))) {
        throw new InvalidArgumentError(`invalid ${key} header`);
      } else if (val === void 0) {
        return;
      }
      let headerName = headerNameLowerCasedRecord[key];
      if (headerName === void 0) {
        headerName = key.toLowerCase();
        if (headerNameLowerCasedRecord[headerName] === void 0 && !isValidHTTPToken(headerName)) {
          throw new InvalidArgumentError("invalid header key");
        }
      }
      if (Array.isArray(val)) {
        const arr = [];
        for (let i = 0; i < val.length; i++) {
          if (typeof val[i] === "string") {
            if (!isValidHeaderValue(val[i])) {
              throw new InvalidArgumentError(`invalid ${key} header`);
            }
            arr.push(val[i]);
          } else if (val[i] === null) {
            arr.push("");
          } else if (typeof val[i] === "object") {
            throw new InvalidArgumentError(`invalid ${key} header`);
          } else {
            arr.push(`${val[i]}`);
          }
        }
        val = arr;
      } else if (typeof val === "string") {
        if (!isValidHeaderValue(val)) {
          throw new InvalidArgumentError(`invalid ${key} header`);
        }
      } else if (val === null) {
        val = "";
      } else {
        val = `${val}`;
      }
      if (headerName === "host") {
        if (request.host !== null) {
          throw new InvalidArgumentError("duplicate host header");
        }
        if (typeof val !== "string") {
          throw new InvalidArgumentError("invalid host header");
        }
        request.host = val;
      } else if (headerName === "content-length") {
        if (request.contentLength !== null) {
          throw new InvalidArgumentError("duplicate content-length header");
        }
        if (!isValidContentLengthHeaderValue(val)) {
          throw new InvalidArgumentError("invalid content-length header");
        }
        request.contentLength = parseInt(val, 10);
      } else if (request.contentType === null && headerName === "content-type") {
        request.contentType = val;
        request.headers.push(key, val);