[BUG] Unable to use Weave with a Genie server

[thazhemadam]

description

I'm trying to run this weave example on a Genie.jl server. However, it seems to block for some reason and not progress at all after a point. I can't even seem to Ctrl+C/Ctrl+D quit the process either.
htop tells me that the julia process is still using my system resources though.
I also seem to be able to run the weave example normally from a REPL. Could someone help me figure out what's going on here and how I could fix this?

versions

using InteractiveUtils; versioninfo():

Julia Version 1.7.0-beta4
Commit d0c90f37ba (2021-08-24 12:35 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, skylake)

using Pkg; Pkg.status():

julia> using Pkg; Pkg.status()
  [717857b8] DSP v0.7.3
  [c43c736e] Genie v3.0.0
  [cd3eb016] HTTP v0.9.14
  [1dea7af3] OrdinaryDiffEq v5.55.1
  [91a5bcdd] Plots v1.22.1
  [44d3d7a6] Weave v0.10.10
  [9a3f8284] Random
  [8dfed614] Test

minimum reproducible steps

1. Download the Weave example (name it, say, x.jmd)
2. Create an environment with Genie, Weave and HTTP added as dependencies.
3. Run -

using Weave
using Genie, Genie.Router, Genie.Renderer.Json, Genie.Requests
using HTTP

route("/weave") do
    weave("x.jmd"; out_path=:pwd)
    return
end

Genie.startup(async = false)

4. Open up your browser and go to localhost:8080
5. Keep an eye on the Genie server running, to see the block and non-responsiveness happen in real-time.

[thazhemadam]

I opened this as a separate issue because I didn't know if there were any issues with running Weave on a Genie server.
Related #310, #436.

#310 (comment) worked for me.