kandi X-RAY | kestrel Summary
kandi X-RAY | kestrel Summary
Kestrel is based on Blaine Cook’s "starling" simple, distributed message queue, with added features and bulletproofing, as well as the scalability offered by actors and the JVM. Each server handles a set of reliable, ordered message queues. When you put a cluster of these servers together, with no cross communication, and pick a server at random whenever you do a set or get, you end up with a reliable, loosely ordered message queue.
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Trending Discussions on kestrel
I have an ASP.NET web app on ubuntu 20.04, and I am using SSL certificate in
.pfx format, which works fine. However, I want to learn how to do the same with the
I know it can be done in
appsettings.json like this and through the
ANSWERAnswered 2022-Mar-22 at 04:43
You can just load it in using
I think I understand CORS pretty well, but I'm still a bit puzzled about the browser's behavior when it comes to the preflight requests.
Let's say the browser issues this preflight request:...
ANSWERAnswered 2022-Mar-21 at 11:28
No, the browser doesn't require the server to explicitly allow the
POST method, because the latter, as a so-called CORS-safelisted method, gets a free pass.
The answer, as always, lies in the Fetch standard (section 4.8), which specifies how CORS works:
- Let methods be the result of extracting header list values given
Access-Control-Allow-Methodsand response’s header list.
And further down:
- If request’s method is not in methods, request’s method is not a CORS-safelisted method, and request’s credentials mode is
"include"or methods does not contain
*, then return a network error.
What is a CORS-safelisted method? The term is defined in section 2.2.1:
A CORS-safelisted method is a method that is
If the method of the CORS request is one of
POST, the browser doesn't require the server to explicitly list that method in the
Access-Control-Allow-Methods header for CORS preflight to succeed.
I've found Jake Archibald's CORS playground useful for testing my (mis)understanding of CORS. Running this particular instance in your browser may convince you that the
POST method doesn't need to be explicitly allowed for CORS preflight to succeed.
I am migrating a .net core 2.1 app from windows server to linux container. It uses SQL Server 2008 report server.
The old app version is running on IIS (windows server), application pool with identity configured (active directory user). The new app version is running on an alpine container using kestrel .net core server standalone, no identity configured.
When the app tries to reach SQL Server 2008 report server there is an error: LoadReport error: One or more errors occured. (NTLM authentication is not possible with default credentials on this platform.)
How can I configure credentials (username and password)(same one set in my old application pool) in my new app based on linux container?
Part of my appsettings.json:...
ANSWERAnswered 2022-Feb-02 at 14:28
Microsoft don't provide support for .NET Core/.NET 5, since the SSRS library is intricately linked with WebForms, which are no longer supported.
Refer this link
Usually, we use
NetworkCredential option to pass username and password while in ASP.NET MVC.
You can able to supply report server's username and password to
ReportSettings.Credential as shown in below.
How do I consolidate/reduce a DataFrame so that it merges rows by custom column 'id' and puts values into a list if they are not Nan. So far I came up with this but it doesn't remove Nans:...
ANSWERAnswered 2022-Jan-10 at 10:16
Series.dropna for remove
In IIS we had an aspnet_isapi extension that handles the request, it then spawns a process w3wp.exe, w3wp.exe then loads and starts the CLR and then CLR does its job.
Now, Kestrel is configured inside the Main() method, so first the Main() should execute, so who starts the Core CLR ? is it IIS for windows and Apache for Linux? Do IIS and Apache know how to search and start Core CLR?
What I know is, when a .NET application is executed at that time the control will go to the operating system, the OS creates a process to load CLR.
The program used by the operating system for loading CLR is called runtime host, which are different depending upon the type of application that is desktop or web-based application i.e.
The runtime host for desktop applications is an API function called CorbinToRuntime.
The runtime host for web-based applications is the ASP.NET worker process (aspnet-wp.exe).
So, how is it possible that first the Main() method will execute and then the CLR, i am not able to digest it, please help....
ANSWERAnswered 2021-Sep-13 at 07:17
Forget about everything you know about IIS.
For Apache or nginx, just run your ASP.NET Core console application (who initializes Core CLR) at a local port (
http://localhost:5000 for example), and then set up reverse proxy rules to forward external traffic to that port.
That's roughly what Microsoft documented in this article
Such reverse proxy setup is common, as other web stacks (Node.js, Python, Go) are using the same approach.
Because of this specific setup, Linux launches your .NET Core console app by analyzing the COFF envelope (of
dotnet executable, or your own executable for self contained deployment) to locate the native entry (not your managed
Apache/nginx is not involved in anyway.
Calling into this entry triggers CoreCLR initialization, and in turn your managed assemblies are loaded and managed
Main is called.
You might find articles like this helpful.
I have a .NET 5 WebApi using Grpc and an IdentityServer4 running behind a YARP reverse proxy. The reverse proxy is using a valid Let's Encrypt certificate and is routing requests to the other two which are listening on localhost:port and using a self signed certificate. They are running on Linux Mint 20.1 and I created the self signed certificate with OpenSSL and added it to
/usr/local/share/ca-certificates/extra and ran
update-ca-certificates to update the certificate store.
Everything runs fine, YARP recognizes the sefl signed certificate for routing the request but requests to the WebApi that require authorization throw this exception:...
ANSWERAnswered 2021-Dec-12 at 15:34
I managed to track down the cause and fix it.The Cause
Microsoft.AspNetCore.Authentication.JwtBeareractually makes not 1 but 2 calls to IdentityServer4: one to
/.well-known/openid-configurationto get the configuration and then a call to the endpoint returned in
jwks_uriof the previous response. The first call was to a
localhost:portendpoint using the self signed certificate and working normally but the 2nd was to a
realdomainendpoint using the Let's Encrypt certificate and failing with the error in the OP.
- The Let's Encrypt certificate had an expired certificate in the chain: it was using DST Root CA X3 instead of ISRG Root X1 (more info here: https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/)
This can be achieved by changing the IdentityServer4 origin in
I'm trying to create a single file asp.net core 5 web app. Goal is to have a single .exe file, run the Kestrel server by executing this exe file and load the page in the browser.
I created an ASP.NET Core 5 template app in VS 2019. Then using cli I run this command:...
ANSWERAnswered 2021-Nov-29 at 21:46
I tried to reproduce your problem on new asp net core empty project and it works fine.
Perhaps Startup is missing some configuration.
Here's what I did.
I am migrating a WebApi from .net5 to .net6. It's going fairly well, but have run into the problem of how to configure Kestrel during startup. The following code is from the Main method of the Program.cs file:...
ANSWERAnswered 2021-Nov-09 at 20:10
The migration guide's code examples cover that. You should use
UseKestrel on the builder's
I have a container deploying a WEB API in ASP.NET Core trying to connect to the SQL Server database. I am running Windows 10 with Docker Desktop.
I can successfully connect to the Docker container with SQL Server from SQL Server Management Studio and my ASP.NET Core app (without container).
But when I run my ASP.NET Core inside the container, I've got an error:...
ANSWERAnswered 2021-Oct-30 at 10:33
Sorry, It was my fail:(
I just forgot that
docker-compose up -d command doesn't rebuild Docker images.
I removed all images, and run the command again.
With the configurations above it works fine for me!
I am finding a problem with
Newtonsoft.Json library throwing a
ANSWERAnswered 2021-Oct-01 at 16:29
Just use the version that MassTransit depends upon, which is much earlier than v13. Upgrading past that without the proper assembly redirects is likely causing your issue.
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