i have deploye my ashx service.when i try to access it using belwo code i got error 401 Unauthorised
System.Net.WebClient webClient = new System.Net.WebClient();
webClient.UseDefaultCredentials = true;
webClient.OpenWriteCompleted += (s, evt) =>
{
try
{
UploadFileData(FsInputFile, evt.Result);
evt.Result.Close();
FsInputFile.Close();
}
catch (System.Net.WebException webEx)
{
//show message
}
};
webClient.OpenWriteAsync(handlerUrl.Uri);
i have deployed this ashx along with WCF service.WCF service is allowed to access fro window authentication only.
can any one tell what should i change to access this handler?
Related
I have a Net 5 Blazor server app published on a productive server and used a valid certificate for https requests, which works fine. Newly I added a HubConnection class to support SignalR notifications between web pages. But if I call the web page through an public URL like https://crm.example.com/call, I get the following error, although the same page works fine if I call it through an internal URL like https://10.12.0.151/call:
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host..
I don't know why it happens, what is the difference between a public and private HTTPS connection? For public connection it uses a valid public certificate and actually works fine if I deactivate the SignalR notification.
Because of the application working just fine if I call the page with an internal URL, seems that all prerequisite for using SignalR are included such as installing WebSocket-Protocol feature on the server and so on.
The following snipet shows the part of code:
try
{
string sHubUrl = NavManager.BaseUri;
sHubUrl = sHubUrl.TrimEnd('/') + "/call";
LogBuilder.LogInfo($"URL in Call.NotificationInit: " + sHubUrl);
hubConnection = new HubConnectionBuilder()
.WithUrl(sHubUrl, options => {
options.UseDefaultCredentials = true;
options.HttpMessageHandlerFactory = (msg) =>
{
if (msg is HttpClientHandler clientHandler)
{
System.Net.ServicePointManager.SecurityProtocol |= System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls12;
// bypass SSL certificate
clientHandler.ServerCertificateCustomValidationCallback +=
(sender, certificate, chain, sslPolicyErrors) => { return true; };
}
return msg;
};
})
.WithAutomaticReconnect()
.Build();
hubConnection.On<string, string>("NewMessage", ReceivedNotification);
await hubConnection.StartAsync();
}
catch (Exception ex)
{
LogBuilder.LogExecption("Exception at Call.NotificationInit");
}
What else should I do? Can anyone help me to solve this problem?
I have a Console Application which I plan to use Application Insights to start telemetry. This Console App calls a Web API within it.
Operation correlation works, but the Parent hierarchy does not. Essentially, the Parent of the Web API call is not the initial call from Console Application.
Below is my code:
Console App
static async Task SendHttpOnly()
{
//Create TelemetryClient
TelemetryConfiguration configuration = TelemetryConfiguration.CreateDefault();
configuration.InstrumentationKey = "<id>";
var telemetryClient = new TelemetryClient(configuration);
RequestTelemetry requestTelemetry = new RequestTelemetry { Name = "ConsoleTest" };
var operation = telemetryClient.StartOperation(requestTelemetry);
try
{
using (var client = new HttpClient())
{
client.BaseAddress = new Uri("http://localhost:37970/");
var responseTask = await client.PostAsJsonAsync<MessageDto>("MessageReceiver", new MessageDto() { Body = "Test" });
}
}
catch (Exception e)
{
operation.Telemetry.Success = false;
telemetryClient.TrackException(e);
throw;
}
finally
{
telemetryClient.StopOperation(operation);
telemetryClient.Flush();
Task.Delay(5000).Wait();
}
}
Web API
[HttpPost]
public string Post([FromBody] MessageDto dto)
{
_telemetryClient.TrackTrace($"Service Bus Message Processed: Message: {dto.Body}");
return $"Processed { dto.Body }";
}
Weird thing is, if I do a Web API to Web API call, it logs it properly. Even with the same code; the 2nd Web API call parent is the 1st Web API call.
Thankyou Water. Glad that you resolved your issue and posting the same as an answer so that it will be helpful for other community members.
Application HttpClient correlation not working because of using wrong Nuget package instead of using below package
Microsoft.ApplicationInsights.AspNetCore
We need to use the below package
Microsoft.ApplicationInsights.WorkerService
Below is the sample code for using SDK in application insights.
<ItemGroup>
<PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.13.1" />
</ItemGroup>
For more information check the Application Insight worker service.
I am adding support for Azure AD B2C to a Blazor WebAssembly App, I followed the instructions here
https://learn.microsoft.com/en-us/aspnet/core/blazor/security/webassembly/hosted-with-azure-active-directory-b2c?view=aspnetcore-3.1#client-app-configuration
however, the application is always trying to authenticate as soon as I load the page,
which does not allow for a public anonymous section of the site.
Is there any solution to this problem?
The default httpClient requires authorization so even making a call to see if a person is authorized causes the code to prompt the user to log in kicks in.
So to get around this, in the Program.cs file (in the Client project), I created a httpClient that allows anonymous requests
// This allows anonymous requests
// See: https://learn.microsoft.com/en-us/aspnet/core/security/blazor/webassembly/additional-scenarios?view=aspnetcore-3.1#unauthenticated-or-unauthorized-web-api-requests-in-an-app-with-a-secure-default-client
builder.Services.AddHttpClient("ServerAPI.NoAuthenticationClient", client => client.BaseAddress = new Uri(builder.HostEnvironment.BaseAddress));
This example should help:
https://github.com/ADefWebserver/SyncfusionHelpDeskClient/blob/main/Client/Pages/Index.razor
It calls the NoAuthenticationClient httpClient
protected override void OnInitialized()
{
// Create a httpClient to use for non-authenticated calls
NoAuthenticationClient =
ClientFactory.CreateClient(
"ServerAPI.NoAuthenticationClient");
}
public async Task HandleValidSubmit(EditContext context)
{
try
{
// Save the new Help Desk Ticket
// Create a new GUID for this Help Desk Ticket
objHelpDeskTicket.TicketGuid =
System.Guid.NewGuid().ToString();
await NoAuthenticationClient.PostAsJsonAsync(
"SyncfusionHelpDesk", objHelpDeskTicket);
// Send Email
HelpDeskEmail objHelpDeskEmail = new HelpDeskEmail();
objHelpDeskEmail.EmailType = "Help Desk Ticket Created";
objHelpDeskEmail.EmailAddress = "";
objHelpDeskEmail.TicketGuid = objHelpDeskTicket.TicketGuid;
await NoAuthenticationClient.PostAsJsonAsync(
"Email", objHelpDeskEmail);
// Clear the form
objHelpDeskTicket = new HelpDeskTicket();
// Show the Toast
ToastContent = "Saved!";
StateHasChanged();
await this.ToastObj.Show();
}
catch (Exception ex)
{
ToastContent = ex.Message;
StateHasChanged();
await this.ToastObj.Show();
}
}
I have a Xamarin app that talks to an API. There is a certain scenario that happens when talking to the API in that a 401 (Unauthorized) exception is returned. This 401 (Unauthorized) is returned on purpose when the user account is made inactive so that even though the users token is still valid on the app they wouldn't be able to get any data back from the API.
I want to be able log the user out of the app, only when a 401 (Unauthorized) exception is thrown.
My API call looks like this:
public async Task<T> GetAsync<T>(string url)
{
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _authToken?.AccessToken ?? this.GetToken().AccessToken);
var json = await _client.GetStringAsync(url);
return json.Deserialize<T>();
}
When the debugger reaches the var json = await _client.GetStringAsync(url); line a 401 (Unauthorized) exception is correctly thrown.
I want to be able to handle this 401 (Unauthorized) exception and log the user out of the app (preferably with an alert informing them of this).
I'm currently debugging on an Android device so I tried adding the following code to the MainActivity class.
protected override async void OnCreate(Bundle bundle)
{
AndroidEnvironment.UnhandledExceptionRaiser += AndroidEnvironmentOnUnhandledException;
}
private void AndroidEnvironmentOnUnhandledException(object sender, RaiseThrowableEventArgs e)
{
if(e.Exception.InnerException.GetBaseException().Message == "401 (Unauthorized)")
{
}
}
When the error is thrown I check if its a 401 (Unauthorized). It was here that I thought I would then log the user out of the app but I don't think this is the right direction.
Is there a best practice for handing this type of scenario that I am not aware of yet?
You could try to use try catch to warp var json = await _client.GetStringAsync(url) like the following code.
try
{
var json = await _client.GetStringAsync(url)
}
catch (WebException e)
{
using (WebResponse response = e.Response)
{
HttpWebResponse httpResponse = (HttpWebResponse)response;
Console.WriteLine("Error code: {0}", httpResponse.StatusCode);
using (Stream data = response.GetResponseStream())
using (var reader = new StreamReader(data))
{
// text is the response body
string text = reader.ReadToEnd();
if (text == "401 (Unauthorized)")
{
}
}
}
}
I've run into a bit of an issue with the iPhone simulator when trying to access a WCF REST service.
I've asked the question on the Xamarin forums, but no joy.
Some context:
I have a PCL for a Xamarin cross platform project, in VS 2012.
I use the Portable Microsoft HttpClient package and the Json.NET package.
I have a pretty simple WCF REST service sitting in the background.
When testing
I can access the service fine from a browser on the dev machine.
I can access it fine using a console application going via the PCL.
I can access it fine via the app, from a real android device on the WiFi network of
the same corporate network.
I can access it fine from Safari on the build Mac.
I can access it fine from Safari on the iPhone simulator on the build Mac.
The issue is, as soon as I try to access the service via the app on the iPhone simulator, I get a 407, Proxy Access Denied error.
Here is the code I'm using to set up the connection:
private static HttpRequestMessage PrepareRequestMessage(HttpMethod method, string baseUri,
string queryParameters, out HttpClient httpClient, string bodyContent)
{
var finalUri = new Uri(baseUri + queryParameters);
var handler = new HttpClientHandler();
httpClient = new HttpClient(handler);
var requestMessage = new HttpRequestMessage(method, finalUri);
if (handler.SupportsTransferEncodingChunked())
{
requestMessage.Headers.TransferEncodingChunked = true;
}
if (method == HttpMethod.Post || method == HttpMethod.Put)
{
requestMessage.Content =
new StringContent(bodyContent, Encoding.UTF8, "application/json");
}
return requestMessage;
}
That code gives me the 407 error.
I have tried setting the proxy by using various combinations of SupportsProxy and SupportsUseProxy. (Both returning false from the simulator.)
I've tried forcing the proxy settings regardless. I've tried setting the credentials on the handler itself. I've tried playing with the UseDefaultCredentials and UseProxy flags. I've also tried setting the IfModifiedSince value in the message header. I've tried using the PortableRest package as well.
All of that only seemed to make things worse. Where I was initially getting the 407 error, the call to httpClient.GetAsync would just immediately return null.
I am at a bit of a loss here, so any help would be greatly appreciated.
PS. For completeness, the rest of the surrounding code that makes the call: (please forgive crappy exception handling, I'm still playing around with the errors)
public static async Task<T> SendRESTMessage<T>(HttpMethod method, string baseUri,
string queryParameters, T contentObject)
{
HttpClient httpClient;
var payload = string.Empty;
if (contentObject != null)
{
payload = JsonConvert.SerializeObject(contentObject);
}
var requestMessage =
PrepareRequestMessage(method, baseUri, queryParameters, out httpClient, payload);
HttpResponseMessage responseMessage = null;
try
{
if (method == HttpMethod.Get)
{
responseMessage = await httpClient.GetAsync(requestMessage.RequestUri);
}
else
{
responseMessage = await httpClient.SendAsync(requestMessage);
}
}
catch (HttpRequestException exc)
{
var innerException = exc.InnerException as WebException;
if (innerException != null)
{
throw new Exception("Unable to connect to remote server.");
}
}
return await HandleResponse<T>(responseMessage);
}
private static async Task<T> HandleResponse<T>(HttpResponseMessage responseMessage)
{
if (responseMessage != null)
{
if (!responseMessage.IsSuccessStatusCode)
{
throw new Exception("Request was unsuccessful");
}
var jsonString = await responseMessage.Content.ReadAsStringAsync();
var responseObject = JsonConvert.DeserializeObject<T>(jsonString);
return responseObject;
}
return default(T);
}
This was my attempt at implementing IWebProxy quick and dirty, which I think could have made things worse:
public class MyProxy : IWebProxy
{
private System.Net.ICredentials creds;
public ICredentials Credentials
{
get
{
return creds;
}
set
{
creds = value;
}
}
public Uri GetProxy(Uri destination)
{
return new Uri("proxy addy here");
}
public bool IsBypassed(Uri host)
{
return true;
}
}
Thanks again for taking the time to read my question.
So I finally got it working.
Turns out it was something really stupid, but being new to iOS mobile dev and the fact that the service worked via Safari on the simulator threw me for a loop.
I read that the simulator uses the proxy settings as defined on the Mac. So I went to the network settings and added the service address to the proxy bypass list.
Works like a charm now.
If anybody feels there is a better way to do this, please add your opinions.