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#!/usr/bin/env python3
"""
This small example program demonstrates one way to integerate with Einhorn using
Python (3).
It serves up the current working directory over HTTP on either the
Einhorn-supplied socket or localhost:8080.
"""
import os
import sys
import socket
import socketserver
import http.server
import logging as log
class EinhornTCPServer(socketserver.TCPServer):
def __init__(self, server_address, RequestHandlerClass):
socketserver.BaseServer.__init__(self, server_address, RequestHandlerClass)
# Try to sniff first socket
try:
fd = int(os.environ['EINHORN_FD_0'])
log.debug("Will try to listen with fd=%d" % fd)
except KeyError:
raise EnvironmentError("Couldn't find EINHORN_FD_0 env variable... is this running under einhorn?")
self.socket = socket.socket(fileno=fd)
# alternative?
#self.socket = socket.fromfd(socket.AF_INET, socket.SOCK_STREAM, fd)
try:
self.server_activate()
except:
self.server_close()
raise
if __name__ == "__main__":
log.basicConfig(
format="%(filename)s [%(process)d] %(levelname)s: %(message)s",
level=log.DEBUG)
Handler = http.server.SimpleHTTPRequestHandler
try:
httpd = EinhornTCPServer(None, Handler)
except EnvironmentError as ee:
log.warn(str(ee))
log.info("Falling back on vanilla http server on 8080")
httpd = socketserver.TCPServer(("localhost", 8080), Handler)
log.debug("Serving!")
try:
httpd.serve_forever()
except KeyboardInterrupt:
log.warn("Caught KeyboardInterrupt, shutting down")
httpd.server_close()
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