invokeAPI method

Implementation

Future<Response> invokeAPI(
  String path,
  String method,
  Iterable<QueryParam> queryParams,
  Object? body,
  Map<String, String> headerParams,
  Map<String, String> formParams,
  String? nullableContentType,
  List<String> authNames,
) async {
  _updateParamsForAuth(authNames, queryParams as List<QueryParam>, headerParams);

  headerParams.addAll(_defaultHeaderMap);

  final urlEncodedQueryParams =
      queryParams.where((param) => param.value != null).map((param) => '$param');

  final queryString =
      urlEncodedQueryParams.isNotEmpty ? '?${urlEncodedQueryParams.join('&')}' : '';

  final url = Uri.parse('$basePath$path$queryString');

  if (nullableContentType != null) {
    headerParams['Content-Type'] = nullableContentType;
  }

  try {
    // Special case for uploading a single file which isn't a 'multipart/form-data'.
    if (body is MultipartFile &&
        (nullableContentType == null ||
            !nullableContentType.toLowerCase().startsWith('multipart/form-data'))) {
      final request = StreamedRequest(method, url);
      request.headers.addAll(headerParams);
      request.contentLength = body.length;
      body.finalize().listen(
            request.sink.add,
            onDone: request.sink.close,
            onError: (error, trace) => request.sink.close(),
            cancelOnError: true,
          );
      final response = await _client.send(request);
      return Response.fromStream(response);
    }

    if (body is MultipartRequest) {
      final request = MultipartRequest(method, url);
      request.fields.addAll(body.fields);
      request.files.addAll(body.files);
      request.headers.addAll(body.headers);
      request.headers.addAll(headerParams);
      final response = await _client.send(request);
      return Response.fromStream(response);
    }

    final msgBody = nullableContentType == 'application/x-www-form-urlencoded'
        ? formParams
        : await serializeAsync(body);
    final nullableHeaderParams = headerParams.isEmpty ? null : headerParams;

    switch (method) {
      case 'POST':
        return await _client.post(
          url,
          headers: nullableHeaderParams,
          body: msgBody,
        );
      case 'PUT':
        return await _client.put(
          url,
          headers: nullableHeaderParams,
          body: msgBody,
        );
      case 'DELETE':
        return await _client.delete(
          url,
          headers: nullableHeaderParams,
        );
      case 'PATCH':
        return await _client.patch(
          url,
          headers: nullableHeaderParams,
          body: msgBody,
        );
      case 'HEAD':
        return await _client.head(
          url,
          headers: nullableHeaderParams,
        );
      case 'GET':
        return await _client.get(
          url,
          headers: nullableHeaderParams,
        );
    }
  } on SocketException catch (e, trace) {
    throw ApiException.withInner(
      HttpStatus.badRequest,
      'Socket operation failed: $method $path',
      e,
      trace,
    );
  } on TlsException catch (e, trace) {
    throw ApiException.withInner(
      HttpStatus.badRequest,
      'TLS/SSL communication failed: $method $path',
      e,
      trace,
    );
  } on IOException catch (e, trace) {
    throw ApiException.withInner(
      HttpStatus.badRequest,
      'I/O operation failed: $method $path',
      e,
      trace,
    );
  } on ClientException catch (e, trace) {
    throw ApiException.withInner(
      HttpStatus.badRequest,
      'HTTP connection failed: $method $path',
      e,
      trace,
    );
  } on Exception catch (e, trace) {
    throw ApiException.withInner(
      HttpStatus.badRequest,
      'Exception occurred: $method $path',
      e,
      trace,
    );
  }

  throw ApiException(
    HttpStatus.badRequest,
    'Invalid HTTP operation: $method $path',
  );
}