Function processHeader

github-actions/browserstack/set-browserstack-env.js:2112–2185

(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");
          }
          request.contentLength = parseInt(val, 10);
          if (!Number.isFinite(request.contentLength)) {
            throw new InvalidArgumentError("invalid content-length header");
          }
        } else if (request.contentType === null && headerName === "content-type") {
          request.contentType = val;
          request.headers.push(key, val);