SuaveIO/suave

Suave is a simple web development F# library providing a lightweight web server and a set of combinators to manipulate route flow and task composition.

Kristian Lundström

@Mousaka

@ademar Thanks for the tip. I've basically only copied the code on the suave introduction page: https://suave.io/index.html

open System
open System.Threading
open Suave

[<EntryPoint>]
let main argv = 
  let cts = new CancellationTokenSource()
  let conf = { defaultConfig with cancellationToken = cts.Token }
  let listening, server = startWebServerAsync conf (Successful.OK "Hello World")

  Async.Start(server, cts.Token)
  printfn "Make requests now"
  Console.ReadKey true |> ignore

  cts.Cancel()

  0 // return an integer exit code

but if I remove Console.ReadKey it becomes nonblocking.

Is the key not to use startWebServerAsync and rather use startWebServer as u mentioned?

trying it out now *

Kristian Lundström

@Mousaka

seems to have done the trick =) thank you! Now I have some port problem with docker but that's at least a new problem

farzadfusion

@farzadfusion

Hi Folks, I am just wondering how I can make Suave Webserver to start automatically in Linux in startup ? Should I create a Daemon ?

Heart Force Medical, Inc.

@HeartForceMedical

Further to question from @farzadfusion, there is an example of a service file in a response to Issue #218. Unfortunately, that example hasn't worked for our deployment of a Suave server on Digital Ocean. SuaveIO/suave#218

Ademar Gonzalez

@ademar

@farzadfusion check out this thread https://www.reddit.com/r/fsharp/comments/7ydhct/how_to_auto_start_suave_app/

Leon Ingelse

@leoningelse_gitlab

Hi Guys, I'm trying to make a hidden field in a form page. I cannot find any information on it anywhere, any help?

Tonino Lucca

@tonyx

@leoningelse_gitlab I think one trick is using javascript to manipulate a field on the fly, to hide it. It looks spooky, but it works. I tried it. Another possibility is just using dotliquid templating. (I used both, until I realized I didn't need hidden field at all!)

Leon Ingelse

@leoningelse_gitlab

@tonyx Thank you for your reply! Would you maybe have some example code snippet?

Ademar Gonzalez

@ademar

@leoningelse_gitlab not sure I follow; if you are coding HTML a simple hidden field would look like this

<input type="hidden" id="custId" name="custId" value="3487">

Tonino Lucca

@tonyx

@leoningelse_gitlab https://gist.github.com/tonyx/7f85f284d7018301178a58e331d3f3a7

Leon Ingelse

@leoningelse_gitlab

@tonyx Thank you so much! You have helped me a lot :)

Tonino Lucca

@tonyx

@leoningelse_gitlab welcome

Harald Steinlechner

@haraldsteinlechner

hi. i'm trying to revive suave proxy functionality as existing here: https://searchcode.com/codesearch/view/109236858/

unfortunately without success yet. there is too much api changes and without insights into internals. this is my current state: https://gist.github.com/haraldsteinlechner/0b3eb4eea492162d223c6f3d5516f744

Harald Steinlechner

@haraldsteinlechner

i restored a much newer version of proxy but in the end i'm stuck with: type HttpConsumer =
| WebPart of WebPart
| SocketPart of (HttpContext -> Async<(HttpContext -> SocketOp<HttpContext option>) option >)

what happened to socketpart?

Ademar Gonzalez

@ademar

yeah we dropped SocketPart and proxy at some point .. still i think it should be possible to shape the function proxy into a webpart .. just change it a bit till you get the correct signature .. I'll look into it later today if you don't beat to me to it .. i will very much would like to have proxy back in

Harald Steinlechner

@haraldsteinlechner

hm i made some progress

what was the idea of heaving to different delayed httpcontexts here in the first place?

Harald Steinlechner

@haraldsteinlechner

cool!

btw this is my last state: https://gist.github.com/haraldsteinlechner/2cd9eeafb444092b035ed83904a13ede

Harald Steinlechner

@haraldsteinlechner

ok this response_f was the problem. wihtout it works at least with http.

Harald Steinlechner

@haraldsteinlechner

ok this is my progress. currently i'm struggling to support websockets... haraldsteinlechner/suave2@939d52e

Harald Steinlechner

@haraldsteinlechner

any ideas how to proceed with websockets? what i found:

UriBuilder does not support ws prefix
using custom websocketrequest here might be crazy?
can we reuse other suave ws infrastructure here?

Harald Steinlechner

@haraldsteinlechner

also, i'm not sure, i think my current implementation is superslow, since all is on a per-request level? for websockets we could initiate handshake at some point, if we are sure it is on per-connection level. iwould be great if you can think this stuff through.

Cadence

@cagyirey

is there any way to call WebSocket.send without using the socket computation expression? I'm trying to call it in an event handler, but I don't think there's a way to do that since WebSocket.send needs to be top-level in the socket expression

Ademar Gonzalez

@ademar

this is where it gets complicated .. for proxying it would be optimal if suave didn't waste time parsing POST payloads or websockets segments and it just copied the bytes over. this is not possible to express in the webpart paradigm .. it would need to be built out of more fundamental constructs.

Ademar Gonzalez

@ademar

@cagyirey not sure i follow you could use Async.RunSynchronously <| websocket.send

Tonino Lucca

@tonyx

Hi, I ported a small Suave program from mono to .net core. Basically now I can run "dotnet run" and it works. But the webserver seems unable to retrieve files like .css and images. The webpart contains an entry like pathRegex "(.*).(css|gif|js|png|jpeg|jpg|)" >=> Files.browseHome, and I tried making the jpeg files and the css available under the current dir , and also the dir where the assembly is deployed (i.e. bin/Debug/netcoreapp2.1), but seems impossible to see those files. Help is appreciated. Thanks. Ciao.

Tonino Lucca

@tonyx

never mind. I found how to do it: changing homeFolder in defaultConfig (that was not necessary when using mono instead of .netcore)

joebo

@joebo

hello - what is the right way to deal with settings in a suave app? I know I can use environment variables but if there's many would an appsettings.json be the right way to go?

dyoshikawa

@dyoshikawa

hi, i’m F# lang and suave newbie.

Paul Agron

@nimzi

@dyoshikawa Welcome

By default suave application on my Mac doesn't serve to the outside world. Only accepts connections from localhost.

There's probably a setting somewhere that enables connections to the outside world

Paul Agron

@nimzi

Hoping someone would point me to it

Harald Steinlechner

@haraldsteinlechner

how do you create your endpoint?

    let config =
        { defaultConfig with
            bindings = [ HttpBinding.create HTTP IPAddress.Any (uint16 port) ] 
        }

did you try using ipadress.any in the bindings?=

Rishav Sharan

@rishavs

Hi guys. are there any benchmarks for Suave? I want to understand how well it stacks aginst Giraffe for simple postgres based api servers

Marwan Rabbâa

@waghanza

https://github.com/the-benchmarker/web-frameworks

or https://github.com/TechEmpower/FrameworkBenchmarks (but very old)

Rishav Sharan

@rishavs

Thanks!

Marwan Rabbâa

@waghanza

@rishavs if you want to contribute to the first , be my guest (I'm the main maintainer)

Van Olivares

@volivaresh_gitlab

Hi everyone

Davide Palmisano

@dpalmisano_twitter

Hi everyone! I'm a newbie of both f# and Suave and I'm loving them both so far!

I have a question tho, which I'm struggling to find an answer to.
Is there a way I can read the request as a stream?

Something that would allow me to do things like:

let stream = ctx.request.Stream ()

and then consuming it incrementally?

thanks a lot in advance!

Ademar Gonzalez

@ademar

Hi @dpalmisano_twitter Not at the moment, the http request would have been already parsed and the body will be handed to you as a byte array.

Davide Palmisano

@dpalmisano_twitter

thanks a lot @ademar

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