1. /**
  2. * Aggregates values of response headers for sandbox usage, supporting older browsers.
  3. *
  4. * @param {object} headers - An object containing the response headers.
  5. * @returns {object} - An object containing aggregated header values. Returns an empty object if headers is null or undefined.
  6. */
  7. function aggregateHeaders(headers) {
  8. if (!headers) {
  9. return {};
  10. }
  12. const aggregated = {};
  14. for (const key in headers) {
  15. if (headers.hasOwnProperty(key)) {
  16. const value = headers[key];
  18. if (Array.isArray(value)) {
  19. // Handle headers that are arrays (e.g., Cache-Control)
  20. aggregated[key] = value.join(', ');
  21. } else if (typeof value === 'string') {
  22. // Handle string values
  23. aggregated[key] = value;
  24. } else if (typeof value === 'number' || typeof value === 'boolean') {
  25. aggregated[key] = String(value); //convert to string for consistency
  26. } else {
  27. // Handle other types (e.g., null, undefined) - convert to string to prevent errors
  28. aggregated[key] = String(value);
  29. }
  30. }
  31. }
  33. return aggregated;
  34. }

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