/// <summary>
/// Sends a webservice to the miniserver
/// </summary>
/// <param name="request">The Request that should be sent</param>
/// <returns>The Response the miniserver returns</returns>
public async override Task <WebserviceResponse> SendWebservice(WebserviceRequest request)
{
WebserviceRequest encRequest = await GetEncryptedRequest(request);
Uri url = new UriBuilder()
{
Scheme = "http",
Host = IP,
Port = Port,
Path = encRequest.Command,
Query = encRequest.Queries.ToString()
}.Uri;
CancellationTokenSource?.Dispose();
CancellationTokenSource = new CancellationTokenSource(request.Timeout);
HttpResponseMessage httpResponse = await HttpClient?.GetAsync(url.OriginalString, CancellationTokenSource.Token);
byte[] responseContent = await httpResponse?.Content.ReadAsByteArrayAsync();
CancellationTokenSource?.Dispose();
if (httpResponse.IsSuccessStatusCode && request.Encryption == EncryptionType.RequestAndResponse) //decypt response if needed
{
responseContent = Encoding.UTF8.GetBytes(Cryptography.AesDecrypt(Encoding.UTF8.GetString(responseContent), Session));
}
WebserviceResponse response = new WebserviceResponse(null, responseContent, (int)httpResponse.StatusCode);
encRequest.TryValidateResponse(response);
return(response);
}
/// <summary>
/// Waits until a matching WebserviceResponse is received
/// </summary>
/// <returns>The received WebserviceResponse</returns>
public WebserviceResponse WaitForResponse()
{
if (!ResponseReceived.WaitOne(Timeout))
{
Response = null;
}
return(Response);
}
/// <summary>
/// Validates the given WebserviceResponse
/// </summary>
/// <param name="response">The WebserviceResponse to validate</param>
/// <returns>Whether the validation succeeded or not</returns>
public virtual bool TryValidateResponse(WebserviceResponse response)
{
if (response != null)
{
Response = response;
ResponseReceived.Set();
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Handles the assignment of the responses to the right requests.
/// </summary>
/// <param name="response">The response that should be handled</param>
/// <returns>Whether or not the reponse could be assigned to a request</returns>
private bool HandleWebserviceResponse(WebserviceResponse response)
{
foreach (WebserviceRequest request in Enumerable.Reverse(Requests))
{
if (request.TryValidateResponse(response))
{
lock (Requests) {
Requests.Remove(request);
}
return(true);
}
}
return(false);
}
/// <summary>
/// The listener starts to wait for messsages from the miniserver
/// </summary>
private void BeginListening()
{
if (Listener != null)
{
TokenSource.Cancel();
Listener = null;
}
Listener = Task.Run(async() => {
while (WebSocket.State == WebSocketState.Open)
{
WebserviceResponse response = await ReceiveWebsocketMessage(1024, TokenSource.Token);
if (!HandleWebserviceResponse(response) && !ParseEventTable(response.Content, response.Header.Type))
{
OnReceiveMessge?.BeginInvoke(WebSocket, new MessageReceivedEventArgs(response), null, null);
}
await Task.Delay(10);
}
}, TokenSource.Token);
}
/// <summary>
/// Sends a webservice to the miniserver and waits until its receives an answer
/// </summary>
/// <param name="request">The Request that should be sent</param>
/// <returns>The Response the miniserver returns</returns>
public async override Task <WebserviceResponse> SendWebservice(WebserviceRequest request)
{
switch (request?.Encryption)
{
case EncryptionType.Request:
request.Command = Uri.EscapeDataString(Cryptography.AesEncrypt($"salt/{Session.Salt}/{request.Command}", Session));
request.Command = $"jdev/sys/enc/{request.Command}";
request.Encryption = EncryptionType.None;
return(await SendWebservice(request));
case EncryptionType.RequestAndResponse:
string command = Uri.EscapeDataString(Cryptography.AesEncrypt($"salt/{Session.Salt}/{request.Command}", Session));
command = $"jdev/sys/fenc/{command}";
WebserviceRequest encryptedRequest = new WebserviceRequest(command, EncryptionType.None);
WebserviceResponse encrypedResponse = await SendWebservice(encryptedRequest);
if (encrypedResponse == null)
{
request.TryValidateResponse(new WebserviceResponse(null, null, (int?)WebSocket?.CloseStatus));
}
else
{
request.TryValidateResponse(new WebserviceResponse(encrypedResponse.Header, Encoding.UTF8.GetBytes(Cryptography.AesDecrypt(encrypedResponse.GetAsStringContent(), Session)), (int?)WebSocket?.CloseStatus));
}
return(request.WaitForResponse());
default:
case EncryptionType.None:
if (WebSocket == null || WebSocket.State != WebSocketState.Open)
{
return(null);
}
lock (Requests) {
Requests.Add(request);
}
byte[] input = Encoding.UTF8.GetBytes(request.Command);
await WebSocket.SendAsync(new ArraySegment <byte>(input, 0, input.Length), WebSocketMessageType.Text, true, CancellationToken.None);
return(request.WaitForResponse());
}
}
/// <summary>
/// Throws a new WebserviceException
/// </summary>
/// <param name="message">The error message</param>
/// <param name="response">the response that caused the error</param>
public WebserviceException(string message, WebserviceResponse response) : base(message)
{
Response = response;
}
/// <summary>
/// Initialises the eventArgs
/// </summary>
/// <param name="response">The received Message</param>
public MessageReceivedEventArgs(WebserviceResponse response)
{
Response = response;
}