HttpServer.py

"""
Simple HTTP server for Python3
- SSL/TLS option
- multithreaded requests and server
"""
#python version check (run by interpreter)
from sys import version_info
if version_info[0] < 3: raise Exception("Python3 required. Module http.server is needed.")

ssl = False     #generate certificate:
                #   openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes
                #server.pem then also contains the private key, which should be protected
import http.server #could be run standalone 'python3 -m http.server 8000'
import socketserver
import os

os.chdir(os.getcwd()+'/src')

class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer): #handles requests in a separate thread. Solves deadlock if a script tries to import other scripts in parallel and waits for them.
    pass

httpServer = ThreadedTCPServer(("",8000),http.server.SimpleHTTPRequestHandler)
if ssl:
    import ssl
    httpServer.socket = ssl.wrap_socket (httpServer.socket, certfile='../server.pem', server_side=True)
#httpServer.serve_forever() #blocks execution

# Start a thread with the server (that starts another thread for each request)
import threading
server_thread = threading.Thread(target=httpServer.serve_forever,daemon=True) #daemon=True #daemon threads get terminated when we( non-deamon caller) terminate. No (cleaner) httpServer.shutdown() needed.
server_thread.start()
#block program, and provide shutdown command
cmd = input("Press 'Enter' to quit.\n")
httpServer.shutdown();
print("exiting...")