File upload fails, using several hundred MBs of RAM on Suave hosted WebSharper project

[reneederer]

When uploading a file, the process memory usage quickly rises from ~100MB to over 1000 MB (and keeps rising). The server side function is never reached. This happens with a small file, with an empty text file, and even when no file is chosen. While hosting my WebSharper project on Owin, uploading files worked.

You can recreate the bug by creating a new Visual Studio project with the template "WebSharper 4 Suave-hosted Site". Then replace the Main() function in Client.fs with

    let Main () =
        div
          [ formAttr
              [ attr.method "post"
                attr.action "/about"
                attr.enctype "multipart/form-data"
              ]
              [ inputAttr
                  [ attr.``type`` "file"
                    attr.name "myFile"
                  ]
                  []
                buttonAttr
                  [ attr.``type`` "submit" ]
                  [ text "Upload" ]
              ]
          ]

[haf]

What version? We upload ~5 MiB files around the clock without rebooting the server for months.

[reneederer]

Suave Version: 2.2.1 WebSharper Version: 4.0.195.127 Target Framework: .NET Framework 4.6.1 Target F# runtime: F# 4.1 (FSharp.Core, 4.4.1.0)

[stevehv]

I am experiencing the same problem with Suave 2.2.1 and WebSharper 4.1.5.205. Is there any information on a fix or workaround?

edit: Same problem on Suave 2.3.0-beta3. It seems that process memory consumption will grow and grow until it runs out of memory. The request never reaches the WebSharper sitelet.

[ademar]

Note that 100 mb is the default max upload size.

https://github.com/SuaveIO/suave/blob/master/src/Suave/Web.fs#L94

You need to increase this value in the configuration record to handle larger files.

On Feb 9, 2018 8:19 PM, "stevehv" [email protected] wrote:

I am experiencing the same problem with Suave 2.2.1. Is there any information on a fix or workaround?

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[ademar]

Sorry I just realized this issue is probably a bug in the owin implementation.

On Feb 10, 2018 2:43 AM, "Ademar Gonzalez" [email protected] wrote:

Note that 100 mb is the default max upload size.

https://github.com/SuaveIO/suave/blob/master/src/Suave/Web.fs#L94

You need to increase this value in the configuration record to handle larger files.

On Feb 9, 2018 8:19 PM, "stevehv" [email protected] wrote:

I am experiencing the same problem with Suave 2.2.1. Is there any information on a fix or workaround?

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