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#!/usr/bin/env python3
# kjandoc demoware server
# a tiny threaded http server for the web interface.
#
# usage: python server.py [port]
# default port: 8080
import os
import sys
import json
import uuid
import time
import shutil
import threading
import subprocess
from http.server import HTTPServer, SimpleHTTPRequestHandler
from socketserver import ThreadingMixIn
from pathlib import Path
from urllib.parse import unquote
PORT = int(sys.argv[1]) if len(sys.argv) > 1 else 8080
BASE_DIR = Path(__file__).parent.resolve()
UPLOAD_DIR = BASE_DIR / 'uploads'
OUTPUT_DIR = BASE_DIR / 'output'
UPLOAD_DIR.mkdir(exist_ok=True)
OUTPUT_DIR.mkdir(exist_ok=True)
# {job_id: {status, command, output, log}}
jobs = {}
jobs_lock = threading.Lock()
class ThreadedServer(ThreadingMixIn, HTTPServer):
daemon_threads = True
class Handler(SimpleHTTPRequestHandler):
def __init__(self, *args, **kwargs):
super().__init__(*args, directory=str(BASE_DIR), **kwargs)
# -- routing --
def do_POST(self):
if self.path == '/api/upload':
self._upload()
elif self.path == '/api/merge':
self._merge()
else:
self.send_error(404)
def do_GET(self):
if self.path.startswith('/api/status/'):
self._status()
else:
super().do_GET()
# -- helpers --
def _json(self, code, data):
body = json.dumps(data).encode('utf-8')
self.send_response(code)
self.send_header('Content-Type', 'application/json')
self.send_header('Content-Length', str(len(body)))
self.end_headers()
self.wfile.write(body)
# -- handlers --
def _upload(self):
job_id = self.headers.get('X-Job-Id', '')
raw_name = self.headers.get('X-Filename', '')
length = int(self.headers.get('Content-Length', 0))
if not job_id or not raw_name:
return self._json(400, {"error": "missing headers"})
if length <= 0:
return self._json(400, {"error": "empty file"})
name = Path(unquote(raw_name)).name
if not name.lower().endswith('.pptx'):
return self._json(400, {"error": "not a .pptx file"})
job_dir = UPLOAD_DIR / job_id
job_dir.mkdir(parents=True, exist_ok=True)
dest = job_dir / name
with open(dest, 'wb') as f:
left = length
while left > 0:
chunk = self.rfile.read(min(left, 65536))
if not chunk:
break
f.write(chunk)
left -= len(chunk)
self._json(200, {"ok": True, "file": name})
def _merge(self):
length = int(self.headers.get('Content-Length', 0))
raw = self.rfile.read(length)
try:
data = json.loads(raw)
except json.JSONDecodeError:
return self._json(400, {"error": "bad json"})
job_id = data.get('job_id', '')
files = data.get('files', [])
if not job_id or not files:
return self._json(400, {"error": "missing job_id or files"})
job_dir = UPLOAD_DIR / job_id
if not job_dir.exists():
return self._json(400, {"error": "upload dir not found — did you upload first?"})
# validate filenames (no path traversal)
for f in files:
if '/' in f or '\\' in f or '..' in f:
return self._json(400, {"error": f"bad filename: {f}"})
if not (job_dir / f).exists():
return self._json(400, {"error": f"not found: {f}"})
# output: epoch_shortid.pptx
epoch = int(time.time())
uid = uuid.uuid4().hex[:8]
out_name = f"{epoch}_{uid}.pptx"
out_path = OUTPUT_DIR / out_name
# build the real command
inputs = [str(job_dir / f) for f in files]
cmd = ['kjandoc'] + inputs + ['-o', str(out_path)]
# pretty command for display (strip numeric id prefixes like "3_")
pretty_names = []
for f in files:
parts = f.split('_', 1)
pretty_names.append(parts[1] if len(parts) == 2 and parts[0].isdigit() else f)
cmd_str = f"kjandoc {' '.join(pretty_names)} -o output/{out_name}"
with jobs_lock:
jobs[job_id] = {
"status": "running",
"command": cmd_str,
"output": out_name,
"log": "",
}
def do_merge():
try:
result = subprocess.run(cmd, capture_output=True, text=True, timeout=600)
log = result.stdout + result.stderr
status = "done" if result.returncode == 0 else "error"
except subprocess.TimeoutExpired:
log = "timed out (10 min limit)"
status = "error"
except Exception as e:
log = str(e)
status = "error"
with jobs_lock:
jobs[job_id]["log"] = log
jobs[job_id]["status"] = status
# clean up uploads for this job
shutil.rmtree(job_dir, ignore_errors=True)
threading.Thread(target=do_merge, daemon=True).start()
self._json(200, {
"ok": True,
"job_id": job_id,
"command": cmd_str,
"output": out_name,
})
def _status(self):
job_id = self.path.rsplit('/', 1)[-1]
with jobs_lock:
job = jobs.get(job_id)
snapshot = dict(job) if job else None
if not snapshot:
return self._json(404, {"error": "unknown job"})
self._json(200, snapshot)
def main():
kjandoc_path = shutil.which('kjandoc')
if not kjandoc_path:
print(f"[!] kjandoc not found in PATH", file=sys.stderr)
print(f" install kjandoc or ensure it's available in your PATH", file=sys.stderr)
sys.exit(1)
srv = ThreadedServer(('', PORT), Handler)
print(f"[*] kjandoc demoware")
print(f"[*] http://localhost:{PORT}")
print(f"[*] kjandoc: {kjandoc_path}")
print(f"[*] ctrl-c to stop")
try:
srv.serve_forever()
except KeyboardInterrupt:
print("\n[*] bye")
srv.shutdown()
if __name__ == '__main__':
main()
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