/// <summary>
/// Starts the azure relay engine.
/// </summary>
public static void StartTunnelRelayEngine()
{
try
{
TunnelRelayEngine.InitializePlugins();
ServiceHost = new WebServiceHost(typeof(WCFContract));
ServiceHost.AddServiceEndpoint(
typeof(WCFContract),
new WebHttpRelayBinding(
EndToEndWebHttpSecurityMode.Transport,
RelayClientAuthenticationType.None),
ApplicationData.Instance.ProxyBaseUrl)
.EndpointBehaviors.Add(
new TransportClientEndpointBehavior(
TokenProvider.CreateSharedAccessSignatureTokenProvider(
ApplicationData.Instance.ServiceBusKeyName,
ApplicationData.Instance.ServiceBusSharedKey)));
ServiceHost.Open();
// Ignore all HTTPs cert errors. We wanna do this after the call to Azure is made so that if Azure call presents wrong cert we bail out.
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((sender, cert, chain, errs) => true);
}
catch (Exception ex)
{
Logger.LogError(CallInfo.Site(), ex, "Failed to start Service host");
throw;
}
}
private async Task <Message> DeleteRequest()
{
return(await TunnelRelayEngine.GetResponse(WebOperationContext.Current));
}
private async Task <Message> PutRequest(Stream pStream)
{
return(await TunnelRelayEngine.GetResponse(WebOperationContext.Current, pStream));
}
/// <summary>
/// Gets the required response from underlying service.
/// </summary>
/// <param name="operationContext">Current operation context.</param>
/// <param name="stream">The stream to get body of incoming request..</param>
/// <returns>Response from underlying service.</returns>
internal static async Task <Message> GetResponse(WebOperationContext operationContext, Stream stream = null)
{
// Buffer the request contents into memory.
MemoryStream memoryStream = null;
if (stream != null)
{
memoryStream = new MemoryStream();
await stream.CopyToAsync(memoryStream);
}
var activeRequestContext = new RequestContext
{
IncomingRequestStream = memoryStream,
IncomingWebRequest = operationContext.IncomingRequest,
};
activeRequestContext.UIRequestDescription = new RequestDetails
{
Method = activeRequestContext.IncomingWebRequest.Method,
Url = activeRequestContext.IncomingWebRequest.UriTemplateMatch.RequestUri.PathAndQuery.Replace(activeRequestContext.IncomingWebRequest.UriTemplateMatch.RequestUri.Segments[1], string.Empty),
RequestHeaders = new List <HeaderDetails>(activeRequestContext.IncomingRequestHeaders.GetUIHeaderMap()),
Timestamp = DateTime.Now.ToString("O"),
RequestReceiveTime = DateTime.Now,
RequestData = activeRequestContext.IncomingRequestStream != null ? await activeRequestContext.IncomingRequestStream.ReadToEndAsync() : string.Empty,
ResponseData = string.Empty,
ResponseHeaders = new List <HeaderDetails>(),
StatusCode = "Active",
Duration = "Active",
};
try
{
// Fire event for request received.
TunnelRelayEngine.RequestReceived?.Invoke(ApplicationData.Instance.ProxyBaseUrl, new RequestEventArgs
{
Request = activeRequestContext.UIRequestDescription,
});
// Get new Request.
HttpRequestMessage requestMessage = TunnelRelayEngine.GetInternalRequest(ref activeRequestContext);
// Execute the request + call plugins.
DateTime hostedServiceRequestStartTime = DateTime.Now;
HttpResponseMessage response = await TunnelRelayEngine.ExecuteInternalRequestAsync(requestMessage);
activeRequestContext.UIRequestDescription.Duration = (DateTime.Now - hostedServiceRequestStartTime).TotalMilliseconds + "ms";
// Copy data from response and populate UI elements.
Stream readableStream = null;
if (response.Content != null)
{
readableStream = await response.Content.ReadAsStreamAsync();
activeRequestContext.UIRequestDescription.ResponseData = await new StreamReader(readableStream).ReadToEndAsync();
readableStream.Seek(0, SeekOrigin.Begin);
}
else
{
activeRequestContext.UIRequestDescription.ResponseData = string.Empty;
}
response.Headers.GetUIHeaderMap().ForEach(header => activeRequestContext.UIRequestDescription.ResponseHeaders.Add(header));
activeRequestContext.UIRequestDescription.StatusCode = response.StatusCode.ToString();
// Get the Serializable response to be sent back over the wire. This response needs to be serializable by WCF standards.
Message responseMessage = TunnelRelayEngine.GetOutgoingResponse(operationContext, response, readableStream);
return(responseMessage);
}
catch (Exception ex)
{
activeRequestContext.UIRequestDescription.StatusCode = "Exception!!";
activeRequestContext.UIRequestDescription.ExceptionHit = true;
activeRequestContext.UIRequestDescription.ResponseData = JsonConvert.SerializeObject(ex, Formatting.Indented);
activeRequestContext.UIRequestDescription.Duration = (DateTime.Now - activeRequestContext.UIRequestDescription.RequestReceiveTime).TotalMilliseconds.ToString() + "ms";
Message exceptionMessage = WebOperationContext.Current.CreateTextResponse(ex.ToString());
WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.InternalServerError;
return(exceptionMessage);
}
finally
{
TunnelRelayEngine.RequestUpdated?.Invoke(ApplicationData.Instance.ProxyBaseUrl, new RequestEventArgs
{
Request = activeRequestContext.UIRequestDescription,
});
}
}
