A simple python server for a Unity WebGL build

unity-webgl-server.py

import sys
from http.server import SimpleHTTPRequestHandler, HTTPServer


class GzipRequestHandler(SimpleHTTPRequestHandler):
    '''HTTPRequestHandler for gzip files'''

    def end_headers(self):
        '''Set Content-Encoding: gzip for gzipped files'''
        if self.path.endswith('.gz'):
            self.send_header('Content-Encoding', 'gzip')
        super().end_headers()

    def do_GET(self):
        '''Set Content-Encoding and Content-Type to gzipped files'''
        path = self.translate_path(self.path)
        if path.endswith('.js.gz'):
            with open(path, 'rb') as f:
                content = f.read()
                self.send_response(200)
                self.send_header('Content-Type', 'application/javascript')
                self.end_headers()
                self.wfile.write(content)
        elif path.endswith('.wasm.gz'):
            with open(path, 'rb') as f:
                content = f.read()
                self.send_response(200)
                self.send_header('Content-Type', 'application/wasm')
                self.end_headers()
                self.wfile.write(content)
        elif path.endswith('.gz'):
            with open(path, 'rb') as f:
                content = f.read()
                self.send_response(200)
                self.send_header('Content-Type',self.guess_type(path))
                self.end_headers()
                self.wfile.write(content)
        else:
            super().do_GET()

def serve(port: int):
    '''Run a local HTTP server'''
    httpd = HTTPServer(('localhost', port), GzipRequestHandler)
    print(f"Serving at http://localhost:{port}")
    httpd.serve_forever()


if __name__ == "__main__":
    try:
        if len(sys.argv) != 2:
            print(f'usage: {sys.argv[0]} [PORT]')
        port = int(sys.argv[1])
        serve(port)
    except Exception as e:
        print('Error:', e)

Thank you!!!!!! I really needed this snippet :)

@mfbru Same! python -m http.server was fine but ran into the occasional issue with the game not packaging correctly. This version is great for that.

I'll share what I created with this

itch.io auto downloader just pass in the URL to the game. If you pass in the same URL/name and it has already been downloaded it will just launch it directly.

I got the auth token from looking at the existing itch.io client traffic

#!/usr/bin/env bash

# Configuration
AUTH_TOKEN="my_token"
USER_AGENT="butler/v15.21.0 itch/26.1.9 (linux)"
API_BASE_URL="https://api.itch.io"
GAME_URL="$1"
GAME_ID="$(curl -s "$GAME_URL" | grep -oP '"id":\K\d+')"
GAME_NAME="$(basename "$GAME_URL")"

# Functions
get_download_id() {
  curl -s \
    -H "User-Agent: $USER_AGENT" \
    -H 'Accept: application/vnd.itch.v2' \
    -H 'Accept-Language: *' \
    -H "Authorization: $AUTH_TOKEN" \
    --compressed \
    "$API_BASE_URL/games/$GAME_ID/uploads" |
    jq '.uploads[] | select(.type == "html") | .id'
}

get_download_token() {
  curl -s \
    -H "User-Agent: $USER_AGENT" \
    -H 'Accept: application/vnd.itch.v2' \
    -H 'Accept-Language: *' \
    -H "Authorization: $AUTH_TOKEN" \
    -H 'Content-Type: application/x-www-form-urlencoded' \
    --compressed \
    -X POST "$API_BASE_URL/games/$GAME_ID/download-sessions" |
    jq -r '.uuid'
}

get_download_url() {
  curl -s \
    -H "User-Agent: $USER_AGENT" \
    -H 'Range: bytes=0-' \
    "$API_BASE_URL/uploads/$(get_download_id)/download?api_key=$AUTH_TOKEN&uuid=$(get_download_token)" \
    -w "%{redirect_url}"
}

download_file() {
  curl -OJ \
    -w '%{filename_effective}' \
    -H "User-Agent: $USER_AGENT" \
    -H 'Range: bytes=0-' \
    "$(get_download_url)"
}

run_in_firefox() {
  cd ~/Games/itch-webgl/"$GAME_NAME" || exit

  # Start the Python HTTP server in the background
  python ~/Games/itch-webgl/server.py 8666 &
  SERVER_PID=$!

  # Start Firefox and wait for it to exit
  /home/parker/Games/itch-webgl/firefox/firefox --kiosk http://127.0.0.1:8666/
  
  # When Firefox exits, kill the Python server
  kill $SERVER_PID
}

# Main script
if [[ -z "$1" ]]; then
  cd /home/parker/Games/itch-webgl/
  python ~/Games/itch-webgl/server.py 8666 &
  SERVER_PID=$!

  # Start Electron and wait for it to exit
  /home/parker/Games/itch-webgl/firefox/firefox --kiosk http://127.0.0.1:8666/
  exit
elif [[ -d "/home/parker/Games/itch-webgl/$GAME_NAME" ]]; then
  run_in_firefox
  exit
fi
mkdir -p ~/Games/itch-webgl/"$GAME_NAME"
cd ~/Games/itch-webgl/"$GAME_NAME" || exit

FILENAME="$(download_file)"
unzip "$FILENAME"

run_in_firefox

Cool! I see you made the URL an argument to the script, it's a good idea because OP's script only works locally as it serves the website at localhost, so you can't access it from another client on the network.

My script is just using OPs script to serve it. So it works all the same.

Hello @vwrs, if you change "localhost" --> "0.0.0.0", the webserver can run from other network clients (e.g., smartphones) 😃