/// <summary>
/// Replaces the old profile with the specified ID with the specified
/// new profile.
/// </summary>
/// <param name="oldProfileId">The ID of the old profile.</param>
/// <param name="newProfile">The new profile.</param>
/// <returns>A task which completes when the process is
/// complete.</returns>
private async Task ReplaceProfile(
Guid oldProfileId,
DynamicDnsProfile newProfile)
{
this.DeleteProfile(oldProfileId);
await this.AddProfile(newProfile);
}
/// <summary>
/// Creates a timer to perform scheduled updates for the specified
/// profile.
/// </summary>
/// <param name="profile">The specified profile.</param>
/// <returns>The created timer.</returns>
private Timer CreateTimer(DynamicDnsProfile profile)
{
var timer = new Timer();
timer.Tick += this.OnTimerTick;
timer.Interval = profile.GetUpdateIntervalInMilliseconds();
timer.Start();
timer.Tag = profile.Id;
return(timer);
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="DynamicDnsUpdateEventArgs"/> class.
/// </summary>
/// <param name="profile">The profile associated with the update
/// attempt.</param>
/// <param name="success">Whether the update succeeded.</param>
/// <param name="ip">The IP associated with the update attempt.</param>
/// <param name="dateTime">The date and time when the update attempt
/// occurred.</param>
/// <param name="response">The response from Namecheap following the
/// update attempt.</param>
/// <param name="exception">The exception associated with the update
/// attempt, if any.</param>
public DynamicDnsUpdateEventArgs(
DynamicDnsProfile profile,
bool success,
IPAddress ip,
DateTime dateTime,
string response,
DynamicDnsException exception)
{
this.UpdateProfile = profile;
this.Success = success;
this.Ip = ip;
this.UpdateDateTime = dateTime;
this.Response = response;
this.UpdateException = exception;
}
/// <summary>
/// Performs a dynamic DNS update with Namecheap servers using the
/// specified profile.
/// </summary>
/// <param name="profile">The specified profile, which contains
/// information about the domain to update and the IP address to
/// use.</param>
/// <returns>The string containing the update response.</returns>
private static async Task <Tuple <string, IPAddress> > GetUpdateResponse(
DynamicDnsProfile profile)
{
try
{
// Use current machine's IPv4 address if requested
var ip = profile.AutoDetectIPAddress
? await GetIp()
: IPAddress.Parse(profile.UpdateIPAddress);
// Get response and parse as XML
HttpWebRequest request = WebRequest.CreateHttp(
"https://dynamicdns.park-your-domain.com/update?" +
"host=" + WebUtility.UrlEncode(profile.Host) +
"&domain=" + WebUtility.UrlEncode(profile.Domain) +
"&password="******"&ip=" + WebUtility.UrlEncode(ip.ToString()));
var response = new XmlDocument();
response.LoadXml(new StreamReader(
request.GetResponse().GetResponseStream()).ReadToEnd());
ValidateUpdateResponse(ip, response);
return(new Tuple <string, IPAddress>(response.OuterXml, ip));
}
catch (WebException ex)
{
throw new DynamicDnsException(
"Dynamic DNS update response network error", ex);
}
catch (XmlException ex)
{
throw new DynamicDnsException(
"Failed to parse dynamic DNS update response as XML", ex);
}
catch (DynamicDnsException ex)
{
throw ex;
}
catch (Exception ex)
{
throw new DynamicDnsException("Unknown error", ex);
}
}
/// <summary>
/// Performs an update for the specified profile.
/// </summary>
/// <param name="profile">The specified profile.</param>
/// <returns>A task which completes when the process is
/// complete.</returns>
public async Task PerformUpdate(DynamicDnsProfile profile)
{
try
{
var response = await GetUpdateResponse(profile);
this.DynamicDnsUpdateEventHandler.Invoke(
this,
new DynamicDnsUpdateEventArgs(
profile,
true,
response.Item2,
DateTime.Now,
response.Item1,
null));
}
catch (DynamicDnsException ex)
{
this.DynamicDnsUpdateEventHandler.Invoke(
this,
new DynamicDnsUpdateEventArgs(
profile,
false,
null,
DateTime.Now,
ex.Response,
ex));
}
catch (Exception ex)
{
this.DynamicDnsUpdateEventHandler.Invoke(
this,
new DynamicDnsUpdateEventArgs(
profile,
false,
null,
DateTime.Now,
null,
new DynamicDnsException("Unknown error", ex)));
}
this.timers.TryGetValue(profile.Id, out Timer timer);
timer?.Stop();
this.timers[profile.Id] = this.CreateTimer(profile);
}
/// <summary>
/// Adds the specified profile to the profiles list.
/// </summary>
/// <param name="profile">The specified profile.</param>
/// <returns>A task which completes when the process is
/// complete.</returns>
private async Task AddProfile(DynamicDnsProfile profile)
{
var statusItem = new ListViewItem(profile.Label)
{
Tag = profile.Id
};
statusItem.SubItems.Add(new ListViewItem.ListViewSubItem(
statusItem, string.Empty));
statusItem.SubItems.Add(new ListViewItem.ListViewSubItem(
statusItem, string.Empty));
this.statusListView.Items.Add(statusItem);
var profileItem = new ComboBoxItem(profile.Label, profile.Id);
this.profilesComboBox.Items.Add(profileItem);
await this.dynamicDns.AddProfile(profile);
}
/// <summary>
/// Called when the Save button is clicked.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="e">The event arguments.</param>
private async void OnSaveButtonClick(object sender, EventArgs e)
{
var mode = this.mode;
var index = profilesComboBox.SelectedIndex;
var profile = new DynamicDnsProfile()
{
Host = hostTextBox.Text,
Domain = domainTextBox.Text,
DynamicDnsPassword = dynamicDnsPasswordTextBox.Text,
Interval =
(UpdateInterval)updateIntervalComboBox.SelectedIndex
};
IPAddress.TryParse(ipAddressTextBox.Text, out IPAddress ipAddress);
profile.UpdateIPAddress = ipAddress?.ToString() ?? string.Empty;
profile.AutoDetectIPAddress = autoDetectCheckBox.Checked;
if (profile.Host == string.Empty || profile.Domain == string.Empty ||
profile.DynamicDnsPassword == string.Empty ||
updateIntervalComboBox.SelectedIndex == -1 ||
(profile.UpdateIPAddress == string.Empty &&
!profile.AutoDetectIPAddress))
{
MessageBox.Show(
"Profile information validation failed.",
"namecheap-dynamic-dns");
return;
}
this.ChangeMode(ProfilesMode.NONE);
if (mode == ProfilesMode.NEW)
{
await this.AddProfile(profile);
}
else if (mode == ProfilesMode.EDIT)
{
var id = ((ComboBoxItem)profilesComboBox.Items[index]).Id;
await this.ReplaceProfile(id, profile);
}
}
/// <summary>
/// Adds the specified profile to the profiles list.
/// </summary>
/// <param name="profile">The specified profile.</param>
/// <returns>A task which completes when the process is
/// complete.</returns>
public async Task AddProfile(DynamicDnsProfile profile)
{
this.profiles[profile.Id] = profile;
await this.PerformUpdate(profile);
}
