void _validateRequest()

in lib/src/server.dart [243:298]
50 lines of code
15 McCabe index (conditional complexity)

  void _validateRequest(request) {
    if (request is! Map) {
      throw RpcException(
          error_code.INVALID_REQUEST,
          'Request must be '
          'an Array or an Object.');
    }

    if (strictProtocolChecks && !request.containsKey('jsonrpc')) {
      throw RpcException(
          error_code.INVALID_REQUEST,
          'Request must '
          'contain a "jsonrpc" key.');
    }

    if ((strictProtocolChecks || request.containsKey('jsonrpc')) &&
        request['jsonrpc'] != '2.0') {
      throw RpcException(
          error_code.INVALID_REQUEST,
          'Invalid JSON-RPC '
          'version ${jsonEncode(request['jsonrpc'])}, expected "2.0".');
    }

    if (!request.containsKey('method')) {
      throw RpcException(
          error_code.INVALID_REQUEST,
          'Request must '
          'contain a "method" key.');
    }

    var method = request['method'];
    if (request['method'] is! String) {
      throw RpcException(
          error_code.INVALID_REQUEST,
          'Request method must '
          'be a string, but was ${jsonEncode(method)}.');
    }

    if (request.containsKey('params')) {
      var params = request['params'];
      if (params is! List && params is! Map) {
        throw RpcException(
            error_code.INVALID_REQUEST,
            'Request params must '
            'be an Array or an Object, but was ${jsonEncode(params)}.');
      }
    }

    var id = request['id'];
    if (id != null && id is! String && id is! num) {
      throw RpcException(
          error_code.INVALID_REQUEST,
          'Request id must be a '
          'string, number, or null, but was ${jsonEncode(id)}.');
    }
  }