Nim emscripten hello world

readme.org

Compile nim hello world to wasm and serve it via http server.

Requirements: emcc should be available via path.

hello.nim world is just

echo "hello world"

Download nim.cfg in the same path as hello.nim, compile using nim c hello.nim, and then compile & run server using nim c -r --skipProjCfg:on httpserve.nim. Open http://127.0.0.1:8080/index.html and you should see example hello world.

htppserve.nim

import asynchttpserver, asyncdispatch, os


proc handler(req: Request) {.async.} =
  echo "request for path ", req.url.path
  let cwd = getCurrentDir()
  let file = cwd / req.url.path
  if fileExists(file):
    await req.respond(Http200, file.readFile())
  else:
    await req.respond(Http404, "Not Found " & file)

var server = newAsyncHttpServer()
waitFor server.serve(Port(8080), handler)

nim.cfg

d:asm
d:emscripten

o:"index.html"

cc = clang
clang.exe = "emcc"
clang.linkerexe = "emcc"
cpu = "i386"