export function getHeaders()

in src/server/request.ts [91:125]
32 lines of code
7 McCabe index (conditional complexity)

export function getHeaders(url: ServerRequestUrl): Headers {
  const headers = new Headers();
  headers.append("x-goog-api-client", getClientHeaders(url.requestOptions));
  headers.append("x-goog-api-key", url.apiKey);

  let customHeaders = url.requestOptions?.customHeaders;
  if (customHeaders) {
    if (!(customHeaders instanceof Headers)) {
      try {
        customHeaders = new Headers(customHeaders);
      } catch (e) {
        throw new GoogleGenerativeAIRequestInputError(
          `unable to convert customHeaders value ${JSON.stringify(
            customHeaders,
          )} to Headers: ${e.message}`,
        );
      }
    }

    for (const [headerName, headerValue] of customHeaders.entries()) {
      if (headerName === "x-goog-api-key") {
        throw new GoogleGenerativeAIRequestInputError(
          `Cannot set reserved header name ${headerName}`,
        );
      } else if (headerName === "x-goog-api-client") {
        throw new GoogleGenerativeAIRequestInputError(
          `Header name ${headerName} can only be set using the apiClient field`,
        );
      }

      headers.append(headerName, headerValue);
    }
  }
  return headers;
}