composeUri static method

String composeUri(ConfigParams options, String? defaultProtocol, int? defaultPort)

Composes URI from config parameters. The result URI will be in the following form: protocol://username@password@host1:port1,host2:port2,...?param1=abc&param2=xyz&...

• options configuration parameters
• defaultProtocol a default protocol
• defaultPort a default port

Implementation

static String composeUri(
    ConfigParams options, String? defaultProtocol, int? defaultPort) {
  var builder = '';

  var protocol =
      options.getAsStringWithDefault('protocol', defaultProtocol ?? '');
  if (protocol != '') {
    builder = protocol + '://' + builder;
  }

  var username = options.getAsNullableString('username');
  if (username != null) {
    builder += username;
    var password = options.getAsNullableString('password');
    if (password != null) {
      builder += ':' + password;
    }
    builder += '@';
  }

  var servers = '';
  var defaultPortStr =
      defaultPort != null && defaultPort > 0 ? defaultPort.toString() : '';
  var hosts = options.getAsStringWithDefault('host', '???').split(',');
  var ports =
      options.getAsStringWithDefault('port', defaultPortStr).split(',');
  for (var index = 0; index < hosts.length; index++) {
    if (servers.isNotEmpty) {
      servers += ',';
    }

    var host = hosts[index];
    servers += host;

    var port = ports.length > index ? ports[index] : defaultPortStr;
    port = port != '' ? port : defaultPortStr;
    if (port != '') {
      servers += ':' + port;
    }
  }

  builder += servers;

  var path = options.getAsNullableString('path');

  if (path != null) {
    builder += '/' + path;
  }

  var params = '';
  var reservedKeys = [
    'protocol',
    'host',
    'port',
    'username',
    'password',
    'servers',
    'path'
  ];
  for (var key in options.getKeys()) {
    if (reservedKeys.contains(key)) {
      continue;
    }

    if (params.isNotEmpty) {
      params += '&';
    }
    params += Uri.encodeComponent(key);

    var value = options.getAsNullableString(key);
    if (value != null && value != '') {
      params += '=' + Uri.encodeComponent(value);
    }
  }

  if (params.isNotEmpty) {
    builder += '?' + params;
  }

  return builder.toString();
}