private String login()

in src/org/jetbrains/plugins/ipnb/protocol/IpnbConnection.java [183:223]
38 lines of code
8 McCabe index (conditional complexity)

  private String login(@NotNull String username, @NotNull String password, @NotNull String loginUrl) throws IOException {
    String urlParameters = null;
    try {
      urlParameters = new URIBuilder()
        .addParameter(XSRF_PARAMETER, myXsrf)
        .addParameter(USERNAME_PARAMETER, username)
        .addParameter(PASSWORD_PARAMETER, password)
        .build().toString();
    }
    catch (URISyntaxException e) {
      LOG.warn(e.getMessage());
    }
    
    if (urlParameters == null) throw new IOException("Unable to login");
    byte[] postData = urlParameters.getBytes(StandardCharsets.UTF_8);
    final HttpsURLConnection connection = ObjectUtils.tryCast(configureConnection((HttpURLConnection)new URL(myURI + loginUrl).openConnection(),
                                                                             HTTPMethod.POST.name()), HttpsURLConnection.class);
    if (connection != null) {
      connection.setUseCaches(false);
      connection.setRequestProperty(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_FORM_URLENCODED.getMimeType());
      connection.setRequestProperty(HttpHeaders.CONTENT_LENGTH, Integer.toString(postData.length));
      connection.setDoOutput(true);

      final OutputStream outputStream = connection.getOutputStream();
      try (DataOutputStream wr = new DataOutputStream(outputStream)) {
        wr.write(postData);
        wr.flush();
      }
      connection.connect();

      final int code = connection.getResponseCode();
      if (code != HttpURLConnection.HTTP_FORBIDDEN && code != HttpURLConnection.HTTP_UNAUTHORIZED) {
        final List<HttpCookie> cookies = myCookieManager.getCookieStore().getCookies();
        if (!cookies.isEmpty()) {
          return cookies.stream().map(cookie -> cookie.getName() + "=" + cookie.getValue()).collect(Collectors.joining(";"));
        }
      }
    }
    String message = connection == null ? "" : connection.getResponseCode() + " " + connection.getResponseMessage();
    throw new IOException(UNABLE_LOGIN_MESSAGE + message);
  }