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Nicholas Budd

@anaximander23

when using Minimal APIs to map endpoints, is there a way to have it map the params to an object?

so, when you do .MapGet("some/url/structure", (string foo, int bar) => HandleRequest(foo, bar));

instead of having to explicitly delcare all the params foo and bar there, can you just give it MyRequestObject that has properties Foo and Bar and have it do model binding?

Michał Zegan

@webczat

i think minimal api does not have advanced full featured model binding. it's minimal for a reason

Nicholas Budd

@anaximander23

hmm

maybe I could do this using the full Map methods instead

basically, I've been working with this framework I've developed for use in APIs that uses a Result<T> type to let you signal error results without exceptions, for cases where errors are expected and not exceptional

so you can do stuff like return Results.NotFound<User>(query.UserId); rather than having to throw new UserNotFoundException(query.UserId);

Michał Zegan

@webczat

minimal api is minimal for a reason... and other map methods are doing direct route mapping to a low level request delegate

Nicholas Budd

@anaximander23

so, we noticed that now that I've implemented automated mapping of Result<T> types to relevant HTTP results, all our controller methods are identical

literally just

var result = await _mediator.Send(query);
return MapToResponse(result);

in every controller method

SQL-MisterMagoo

@SQL-MisterMagoo

Custom Binding

Nicholas Budd

@anaximander23

so I was wondering if there's a way to hook up something that registers that for stuff, but using different types of query

I have it working mostly, but it's complaining that the body type is inferred and that's not allowed

Custom Binding

that looks promising but might require consuming applications to write binders for everything

which... isn't the worst thing, but I was hoping to avoid it

that said... in theory I could pull the URL, body, and query params into a collection, right?

in fact that's probably already available

just a flat dictionary of values

and then use something like AgileMapper to map those onto the query object

do that in a base type

...this is all probably a horrible abuse of Minimal APIs

but if I can get it working then you can define a whole API like this

and then just write a load of handlers

(it uses MediatR under the hood)

Lari Tuomisto

@shinpou

any idea if I can somehow easily verify if model binding has occurred or not - I wish to verify that my uploaded files are actually being streamed without being loaded into memory

Taylor

@TaylorWatson

hi guys :)

If I have a URL as a string. Is there a way I can utilize the .Net's Query logic to automatically break up the parameters?

https://duck.com?id=help&subject=me

That's a string not a context, is there a simple way to convert it to something so I can just go Query["id"] or something similar?

Thank you in advance :)

nevermind, typing it out I remember about HttpUtlity ... duh, thanks for being my rubber duck guys

https://docs.microsoft.com/en-us/dotnet/api/system.web.httputility.parsequerystring?view=net-6.0

tag5

@tag5

Hello, I have an asp.net core web application hosted on an azure app service. Is it possible to remote debug this application from visual studio ? I have tried to remote debug an asp.net core web application hosted on an IIS web server. It works fine. But azure app service does not work with IIS. It seems to run dotnet run command. So i don't know how can i remote debug this app. Thanks

Alok Sharma

@aloksharma1

Hello all, i need a little help with thread safe file writing to disk, i tried ReaderWriterLockSlim but it is not what i want (one write and many read) but still gets called on next requet

basically i am creating disk files in middleware, so multiple users can concurrently hit the middleware and the scenario of using ReaderWriterLockSlim fails with recursion exception

what i want is a queue like system, where on first request in pipeline the middleware create a unique write thread, so it doesnt matter if after first thread in queue a 100 users hit the request url or a 1000 the result will always be from FIFO based

this files are write once type so i really dont need to re-initiations, re-writes whatever you want to call it

how to achieve this in a thread safe manner

Alok Sharma

@aloksharma1

ok this blog https://michaelscodingspot.com/c-job-queues/

solved my issue rabbitmq etc are overkill for my needs, this is a bit under so adding cutom layers on top of it atleast its thread safe

the life of a programmer 🙂

Hello, I have an asp.net core web application hosted on an azure app service. Is it possible to remote debug this application from visual studio ? I have tried to remote debug an asp.net core web application hosted on an IIS web server. It works fine. But azure app service does not work with IIS. It seems to run dotnet run command. So i don't know how can i remote debug this app. Thanks

i think what you need can be inferred from here https://docs.microsoft.com/en-us/visualstudio/debugger/remote-debugging-dotnet-core-linux-with-ssh?view=vs-2022

@tag5

nevermind, typing it out I remember about HttpUtlity ... duh, thanks for being my rubber duck guys
https://docs.microsoft.com/en-us/dotnet/api/system.web.httputility.parsequerystring?view=net-6.0

you can also try json to split queries and remake them, i use this approach when i dont have access to httputility

Nicholas Budd

@anaximander23

is there a specific object or service that handles model binding that I could invoke separately?

got a slightly odd scenario where I basically want to replicate the ways that the various contents of an incoming request are bound to controller params

wondering if there's something I could get from dependency injection and give it the request object from the HttpContext and the desired type, and it'd give me a populated instance

Alok Sharma

@aloksharma1

wondering if there's something I could get from dependency injection and give it the request object from the HttpContext and the desired type, and it'd give me a populated instance

so if i understand correctly, you want to DI specific HTTPContext Request query param & get the output based on that? can you put a example request i think what you need is already available using controller conventions and route sniffing

Nicholas Budd

@anaximander23

@aloksharma1 so, I'm not in a controller, but I'm also not necessarily able to use things like [FromBody]; I've got access to the HttpContext and the DI container, and I have the desired type as a type parameter

so given the argument T and a HttpContext, I'd like to be able to use some kind of BindToNewInstance<T>() method that'll give me an instance of T populated the way it would have been via model binding

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