async function defaultParseResponse()

in src/core.ts [59:99]

• 27 lines of code
• 7 McCabe index (conditional complexity)

async function defaultParseResponse<T>(props: APIResponseProps): Promise<WithRequestID<T>> {
  const { response } = props;
  if (props.options.stream) {
    debug('response', response.status, response.url, response.headers, response.body);

    // Note: there is an invariant here that isn't represented in the type system
    // that if you set `stream: true` the response type must also be `Stream<T>`

    if (props.options.__streamClass) {
      return props.options.__streamClass.fromSSEResponse(response, props.controller) as any;
    }

    return Stream.fromSSEResponse(response, props.controller) as any;
  }

  // fetch refuses to read the body when the status code is 204.
  if (response.status === 204) {
    return null as WithRequestID<T>;
  }

  if (props.options.__binaryResponse) {
    return response as unknown as WithRequestID<T>;
  }

  const contentType = response.headers.get('content-type');
  const mediaType = contentType?.split(';')[0]?.trim();
  const isJSON = mediaType?.includes('application/json') || mediaType?.endsWith('+json');
  if (isJSON) {
    const json = await response.json();

    debug('response', response.status, response.url, response.headers, json);

    return _addRequestID(json, response);
  }

  const text = await response.text();
  debug('response', response.status, response.url, response.headers, text);

  // TODO handle blob, arraybuffer, other content types, etc.
  return text as unknown as WithRequestID<T>;
}