I have created a ASP.Net Web API project and using this link. NServiceBus is integrated with web api. Here is my configuration at web api as a client.
Configure.Serialization.Xml();
Configure.Transactions.Enable();
Configure.With()
.DefineEndpointName(Constants.ClientName)
.DefaultBuilder()
.ForWebApi()
.Log4Net()
.UseTransport<Msmq>()
.PurgeOnStartup(false)
.UnicastBus()
.ImpersonateSender(false)
.CreateBus()
.Start();
This is how I'm sending message to Server
var response = await Bus.Send(Constants.ServerName, request)
.Register<ResponseModel>((NServiceBus.CompletionResult completionResult) =>
{
ResponseModel responseMessage = null;
if (completionResult != null && completionResult.Messages.Length > 0)
{
var status = completionResult.Messages[0] as RequestStatus?;
if (status == RequestStatus.Successful)
{
responseMessage = TransactionManager.TransactionDictionary[request.RequestId].ResponseModel;
}
}
return responseMessage;
});
This is how I'm sending response from Server. I have commented some lines to show what I have already tried.
public void Handle(RequestModel message)
{
ProcessRequest(message).RunSynchronously();
}
private async Task ProcessRequest(RequestModel message)
{
....
ResponseModel response = new ResponseModel();
response.RequestId = message.RequestId;
response.Result = await responseMessage.Content.ReadAsStringAsync();
//Bus.Send(Util.Constants.ClientName, response);
//Bus.Reply(response);
//Bus.Reply<ResponseModel>((ResponseModel response) =>
//{
// response = Bus.CreateInstance<ResponseModel>(r =>
// {
// r.RequestId = message.RequestId;
// r.Result = responseMessage.Content.ReadAsStringAsync().Result;
// });
//});
await Bus.Send(Util.Constants.ClientName, response).Register((NServiceBus.CompletionResult completionResult) =>
{
if (completionResult != null && completionResult.Messages.Length > 0)
{
var msg = completionResult.Messages[0];
if (msg != null)
{
var status = (RequestStatus)msg;
return status;
}
}
return RequestStatus.Error;
});
....
}
From any of the above response methods ultimately all messages end up in error queue.
Previously I was getting 'Could not enlist message' error. Now it is not throwing that error. But Server could not send message to Client.
I could not get what I'm doing wrong. Please also suggest if you see any scope for improvements.
I'm not sure if TransactionScope work correctly with async/await in C#. According to this question (Get TransactionScope to work with async / await) in .NET 4.5.1 there was introduced option for TransactionScope that enable mixing it with async/await. Unfortunately NServiceBus doesn't support .NET 4.5/4.5.1 so try just remove async/await.
Related
We just started using SignalR in an MVC application and now we're getting a bunch of alerts due to high average response time. I suspect this to be misleading as the application isn't experiencing performance degradation. It appears that SignalR uses this URL to make a connection. This url not a controller/action of the project and just the built in SignalR code in the js file. jquery.signalR-2.2.1.js is the file. I suspect that it is just leaving the websocket connection open while they are on this page and it's skewing our numbers. Is this accurate? If so, is there a way to filter it out of the application insights?
Here is the counter. Is this the expected behavior?
Here is the signalR jquery code where it builds it's url:
// BUG #2953: The url needs to be same otherwise it will cause a memory leak
getUrl: function (connection, transport, reconnecting, poll, ajaxPost) {
/// <summary>Gets the url for making a GET based connect request</summary>
var baseUrl = transport === "webSockets" ? "" : connection.baseUrl,
url = baseUrl + connection.appRelativeUrl,
qs = "transport=" + transport;
if (!ajaxPost && connection.groupsToken) {
qs += "&groupsToken=" + window.encodeURIComponent(connection.groupsToken);
}
if (!reconnecting) {
url += "/connect";
} else {
if (poll) {
// longPolling transport specific
url += "/poll";
} else {
url += "/reconnect";
}
if (!ajaxPost && connection.messageId) {
qs += "&messageId=" + window.encodeURIComponent(connection.messageId);
}
}
url += "?" + qs;
url = transportLogic.prepareQueryString(connection, url);
if (!ajaxPost) {
url += "&tid=" + Math.floor(Math.random() * 11);
}
return url;
},
I fixed this by following the instructions on https://learn.microsoft.com/en-us/azure/application-insights/app-insights-api-filtering-sampling:
Update your ApplicationInsights Nuget package to 2.0.0 or later.
Create a class implementing ITelemetryProcessor:
public class UnwantedTelemetryFilter : ITelemetryProcessor
{
private ITelemetryProcessor Next { get; set; }
public UnwantedTelemetryFilter(ITelemetryProcessor next)
{
this.Next = next;
}
public void Process(ITelemetry item)
{
var request = item as RequestTelemetry;
if (request != null && request.Name != null)
if (request.Name.Contains("signalr"))
return;
// Send everything else:
this.Next.Process(item);
}
}
Add the processor to your Application_Start() in Global.asax.cs:
var builder = TelemetryConfiguration.Active.TelemetryProcessorChainBuilder;
builder.Use((next) => new UnwantedTelemetryFilter(next));
builder.Build();
if the calls are coming from the C# part of the app, the easiest way is to write a custom telemetry processor:
https://learn.microsoft.com/en-us/azure/application-insights/app-insights-api-filtering-sampling
public void Process(ITelemetry item)
{
var request = item as RequestTelemetry;
if (request != null && request.[some field here].Equals("[some signalr specific check here]", StringComparison.OrdinalIgnoreCase))
{
// To filter out an item, just terminate the chain:
return;
}
// Send everything else:
this.Next.Process(item);
}
and use that to explicitly filter out the signalr calls from being sent
or if the calls are coming from JS, then the telemetry initializer there does a similar thing to filter out telemetry if you return false in the initializer.
I am trying to insert a new entry in my database using web api. I have two web projects: one is a UI project where all the user interaction will occur and the other is a services project which will handle all interactions with my database.
Below is my post method that will take in form data for creating a new team.
// POST: Api/Team/Create
[HttpPost]
public ActionResult Create(Team team)
{
try
{
if (ModelState.IsValid)
{
HttpEndPointContext httpEndPoint = new HttpEndPointContext()
{
AuthenticationMethod = HttpAuthenticationMethods.None,
Ssl = false,
HttpMethod = HttpMethod.Post,
Path = "localhost:32173/api/team/",
QueryStrings = null,
PayloadData = SerializationHelper.Current.Serialize(team.ToString(), SerializationTypes.Xml)
};
IProcessResult result = HttpConnectionManager.Current.SendMessage(httpEndPoint);
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
And this is my method for dealing with my PayloadStream/PayloadData attribute in the above method:
private void StreamPayload(HttpWebRequest webRequest, HttpEndPointContext httpEndPointContext)
{
if (httpEndPointContext.HttpMethod == new HttpMethod("GET"))
return;
//TODO: FIX MAYBE .... sometimes we want to post body with GET.
//Stream vs string
if (httpEndPointContext.PayloadStream == null)
{
//Wrap with SOAP Envelope and method if defined in SoapDefinition
string data = httpEndPointContext.PayloadData ?? String.Empty;
if (httpEndPointContext.SoapDefinition != null)
{
//If parameters is set, clear existing payload data.
data = String.Empty;
if (httpEndPointContext.SoapDefinition.Parameters != null)
foreach (var parameter in httpEndPointContext.SoapDefinition.Parameters)
{
data += String.Format("<{0}>{1}</{0}>", parameter.Key, parameter.Value);
}
data = String.Format("<s:Envelope xmlns:s='http://schemas.xmlsoap.org/soap/envelope/'>" +
"<s:Body><{0} xmlns='{2}'>" +
"{1}</{0}></s:Body></s:Envelope>",
httpEndPointContext.SoapDefinition.SoapMethod, data,httpEndPointContext.SoapDefinition.SoapGlobalKey);
}
byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(data);
httpEndPointContext.PayloadStream = new MemoryStream(byteArray);
}
using (Stream requestStream = webRequest.GetRequestStream())
{
StreamHelper.Current.CopyStreams(httpEndPointContext.PayloadStream, requestStream);
requestStream.Close();
}
}
And the code for getting the server response. I'm currently getting an Internal Server (500) Error. Not sure why.
public IProcessResult SendMessage(HttpEndPointContext httpEndPointContext)
{
HttpWebRequest webRequest = CreateWebRequest(httpEndPointContext);
StreamPayload(webRequest, httpEndPointContext);
IProcessResult result = GetWebResponse(webRequest, httpEndPointContext);
return result;
}
private IProcessResult GetWebResponse(HttpWebRequest webRequest, HttpEndPointContext httpEndPointContext)
{
//Get Response
WebResponse response;
IProcessResult result = new ProcessResult(Statuses.Success);
try
{
response = webRequest.GetResponse();
}
catch (System.Net.WebException ex)
{
//Do exception handling. Still get the response for 500s etc.
result.Error.Exception = ex;
result.Status = Constants.Statuses.FailedUnknown;
result.ResponseCodeDescription = ex.Status.ToString();
result.ResponseCode = ex.Status.ToString();
result.Error.ErrorCode = ex.Status.ToString();
response = ex.Response;
//The error did not have any response, such as DNS lookup.
if (response == null)
return result;
}
try
{
//Get the response stream.
Stream responseData = response.GetResponseStream();
if (responseData == null)
throw new CoreException("No Response Data in GetWebResponse.",
"No Response Data in GetWebResponse. EndPoint:{0}", httpEndPointContext.ToString());
// Open the stream using a StreamReader for easy access.
var reader = new StreamReader(responseData);
// Read the content.
result.ResponseData = reader.ReadToEnd();
}
finally
{
response.Close();
}
result.ResponseCode = ((int)((HttpWebResponse)response).StatusCode).ToString();
result.ResponseCodeDescription = ((HttpWebResponse) response).StatusDescription;
return result;
}
And finally, my method for inserting to the database, found in my services project:
//POST api/controller/5
public IProcessResult Insert(Team team)
{
return TeamBusinessManager.Current.Insert(SecurityManager.Current.ConnectionContext, new Team());
}
I'm confused as to why I'm getting the 500 error. I'm not sure if it's the PayloadData attribute in my POST method or is it something wrong with my method in my services project.
I am new to Web API and HTTP.
I am using the MVC 6 (beta version). I have a proxy service (Web API) which has a POST method to get response from another service with XML content returned. I need to return the response content to the client since the client can't call the service directly.
// In my proxy service
public HttpResponseMessage Post(String content)
{
using ( HttpClient client = new HttpClient() ) {
.......
HttpResponseMessage response = client.PostAsync(uri, content).Result;
// I get everything I need in the "response".
// How to return the response or it body to the client.
// return response;
}
}
II need to return the "response" to the client with no or minimum changes. I tried "return response", or create a new HttpResponseMessage, but I only got something like
{"Headers":[{"Key":"Content-Type","Value":["text/xml"]}]}
in the body.
So is there a simple way to pass the response back to the client? Thanks.
The ASP.NET team is currently working on a "proxy middleware" that does exactly what you're looking for: https://github.com/aspnet/Proxy
Here's how it works internally:
public async Task Invoke(HttpContext context)
{
var requestMessage = new HttpRequestMessage();
if (string.Equals(context.Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
{
var streamContent = new StreamContent(context.Request.Body);
requestMessage.Content = streamContent;
}
// Copy the request headers
foreach (var header in context.Request.Headers)
{
if (!requestMessage.Headers.TryAddWithoutValidation(header.Key, header.Value) && requestMessage.Content != null)
{
requestMessage.Content?.Headers.TryAddWithoutValidation(header.Key, header.Value);
}
}
requestMessage.Headers.Host = _options.Host + ":" + _options.Port;
var uriString = $"{_options.Scheme}://{_options.Host}:{_options.Port}{context.Request.PathBase}{context.Request.Path}{context.Request.QueryString}";
requestMessage.RequestUri = new Uri(uriString);
requestMessage.Method = new HttpMethod(context.Request.Method);
using (var responseMessage = await _httpClient.SendAsync(requestMessage, HttpCompletionOption.ResponseHeadersRead, context.RequestAborted))
{
context.Response.StatusCode = (int)responseMessage.StatusCode;
foreach (var header in responseMessage.Headers)
{
context.Response.Headers.SetValues(header.Key, header.Value.ToArray());
}
foreach (var header in responseMessage.Content.Headers)
{
context.Response.Headers.SetValues(header.Key, header.Value.ToArray());
}
// SendAsync removes chunking from the response. This removes the header so it doesn't expect a chunked response.
context.Response.Headers.Remove("transfer-encoding");
await responseMessage.Content.CopyToAsync(context.Response.Body);
}
}
https://github.com/aspnet/Proxy/blob/dev/src/Microsoft.AspNet.Proxy/ProxyMiddleware.cs
I'm able to create a XMPP connection on page load. However whenever I move to another pages, I want to use the same connection to remove recurring notifications in client. I've used following code.
$(document).bind('connect', function (ev, data) {
var jid = $.jStorage.get('JID', null);
var sid = $.jStorage.get('SID', null);
var rid = $.jStorage.get('RID', null);
if ((jid != null) && (sid != null) && (rid != null)) {
var conn = new Strophe.Connection("http://localhost:5280/xmpp-httpbind");
conn.attach(jid, sid, rid, function () {
alert('Connection attach success.');
Gab.connection = conn;
});
}
else {
var conn = new Strophe.Connection("http://localhost:5280/xmpp-httpbind");
conn.connect(data.jid, data.password, function (status) {
if (status === Strophe.Status.CONNECTED) {
$(document).trigger('connected');
} else if (status === Strophe.Status.DISCONNECTED) {
$(document).trigger('disconnected');
}
});
Gab.connection = conn;
}
});
And in unload:
$(window).unload(function () {
if (Gab.connection != null) {
Gab.connection.pause();
$.jStorage.set('JID', Gab.connection.jid);
$.jStorage.set('SID', Gab.connection.sid);
$.jStorage.set('RID', Gab.connection.rid);
} else {
$.jStorage.flush();
}
// Gab.connection = null;
alert('paused/disconnected');
})
It attaches to connection, however as soon as it attaches, it says (POST http://localhost:5280/xmpp-httpbind 404 Not Found 36ms) in Firebug console. Any ideas?
Thanks in advance.
You should not trust unload. Instead store/update your RID on every cb from the xmpp server. Make sure your RID is getting incremented on each call as well.
Make sure to inspect the body of the message. Some XMPP servers return HTTP 404 on terminate.
I have a problem with sending POST http request. It stops on (HttpWebResponse)request.GetResponse() and after timeout throws timeout expired exception, but if i send the same request via GET all works fine.
Does any body know what it can be?
try
{
var request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
if (content != null)
request.GetRequestStream().Write(content, 0, content.Length);
using (var response = (HttpWebResponse)request.GetResponse())
{
return new Response(response);
}
}
catch (WebException exception)
{
return new Response(exception);
}
Most likely, this is due to the code on the server not exposing this method as a POST. If the server doesn't explicitly set anyhting, it defaults to GET only.
Fixed problem with this code:
using (var requestStream = request.GetRequestStream())
{
if (content != null)
{
requestStream.Write(content, 0, content.Length);
}
requestStream.Close();
using (var response = (HttpWebResponse)request.GetResponse())
{
return new Response(response);
}
}