python simple HTTP server with POST body logging

serverPOST.py

#!/usr/bin/env python3

from http.server import HTTPServer, SimpleHTTPRequestHandler
from http import HTTPStatus
import sys
import string
import os

uploadPath = "/myupload/"

def format_filename(s):
    valid_chars = "-_.() %s%s" % (string.ascii_letters, string.digits)
    filename = ''.join(c for c in s if c in valid_chars)
    filename = filename.replace(' ','_') # I don't like spaces in filenames.
    filename = "f_" + filename
    return filename

class MyHandler(SimpleHTTPRequestHandler):
    rbufsize = 0
    
    def do_POST(self):
        self.send_response(HTTPStatus.OK)
        self.end_headers()
        mb = self.rfile.read(10000000)
        if self.path.startswith(uploadPath):
            fname = format_filename(self.path.split("/myupload/")[1])
            with open(fname, "wb") as f:
                f.write(mb)
            self.log_message("POST %s : wrote file %s", self.path, fname)
        else:
            self.log_message("POST %s : %s", self.path, mb)

port = 80
ip = '0.0.0.0'
if len(sys.argv) >= 2 and  sys.argv[1].isnumeric(): 
    port = int(sys.argv[1])
print("serving on", ip, str(port), "folder ", os.getcwd())
print(f"upload files on {uploadPath}/yourfilename.txt")

httpd = HTTPServer((ip, port), MyHandler)
httpd.serve_forever()