Gemini CGI helper compatible with gmnisrv

smolcgi.py

#!/bin/false
from os import environ

def getenv(name):
    return environ.get(name, "")

version = getenv("GATEWAY_INTERFACE")
protocol = getenv("SERVER_PROTOCOL")
software = getenv("SERVER_SOFTWARE")
url = getenv("GEMINI_URL")
script = getenv("SCRIPT_NAME")
path = getenv("PATH_INFO")
query = getenv("QUERY_STRING")
host = getenv("SERVER_NAME")
port = getenv("SERVER_PORT")
remote = getenv("REMOTE_HOST")
tls_cipher = getenv("TLS_CIPHER")
tls_version = getenv("TLS_VERSION")
auth_type = getenv("AUTH_TYPE")
cert_hash = getenv("TLS_CLIENT_HASH")
cert_sn = getenv("TLS_CLIENT_SERIAL_NUMBER")
cert_name = getenv("REMOTE_USER")

cgi_vars = [
    "version", "protocol", "software", "url", "script", "path", "query", "host",
    "port", "remote", "tls_cipher", "tls_version", "auth_type", "cert_hash",
    "cert_sn", "cert_name"
]

def header(code, meta):
    print(f"{code} {meta}", end="\r\n")

def exit_with_header(code, meta):
    header(code, meta)
    exit()

def require_input(meta):
    exit_with_header(10, meta)

def temp_error(meta):
    exit_with_header(42, meta)

def not_found():
    exit_with_header(51, "")

def debug():
    header(20, "text/plain")
    print_env()
    exit()

def print_env():
    globz = globals()
    for key in cgi_vars:
        print(f"{key} = {repr(globz[key])}")