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#!/usr/bin/env python2.7
# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Manage TCP ports for unit tests; started by run_tests.py"""
import argparse
import BaseHTTPServer
import hashlib
import os
import socket
import sys
import time
# increment this number whenever making a change to ensure that
# the changes are picked up by running CI servers
# note that all changes must be backwards compatible
_MY_VERSION = 7
if len(sys.argv) == 2 and sys.argv[1] == 'dump_version':
print _MY_VERSION
sys.exit(0)
argp = argparse.ArgumentParser(description='Server for httpcli_test')
argp.add_argument('-p', '--port', default=12345, type=int)
argp.add_argument('-l', '--logfile', default=None, type=str)
args = argp.parse_args()
if args.logfile is not None:
sys.stdin.close()
sys.stderr.close()
sys.stdout.close()
sys.stderr = open(args.logfile, 'w')
sys.stdout = sys.stderr
print 'port server running on port %d' % args.port
pool = []
in_use = {}
def refill_pool(max_timeout, req):
"""Scan for ports not marked for being in use"""
for i in range(1025, 32767):
if len(pool) > 100: break
if i in in_use:
age = time.time() - in_use[i]
if age < max_timeout:
continue
req.log_message("kill old request %d" % i)
del in_use[i]
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
s.bind(('localhost', i))
req.log_message("found available port %d" % i)
pool.append(i)
except:
pass # we really don't care about failures
finally:
s.close()
def allocate_port(req):
global pool
global in_use
max_timeout = 600
while not pool:
refill_pool(max_timeout, req)
if not pool:
req.log_message("failed to find ports: retrying soon")
time.sleep(1)
max_timeout /= 2
port = pool[0]
pool = pool[1:]
in_use[port] = time.time()
return port
keep_running = True
class Handler(BaseHTTPServer.BaseHTTPRequestHandler):
def do_GET(self):
global keep_running
if self.path == '/get':
# allocate a new port, it will stay bound for ten minutes and until
# it's unused
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
p = allocate_port(self)
self.log_message('allocated port %d' % p)
self.wfile.write('%d' % p)
elif self.path[0:6] == '/drop/':
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
p = int(self.path[6:])
if p in in_use:
del in_use[p]
pool.append(p)
self.log_message('drop known port %d' % p)
else:
self.log_message('drop unknown port %d' % p)
elif self.path == '/version_number':
# fetch a version string and the current process pid
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
self.wfile.write(_MY_VERSION)
elif self.path == '/dump':
# yaml module is not installed on Macs and Windows machines by default
# so we import it lazily (/dump action is only used for debugging)
import yaml
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
now = time.time()
self.wfile.write(yaml.dump({'pool': pool, 'in_use': dict((k, now - v) for k, v in in_use.iteritems())}))
elif self.path == '/quitquitquit':
self.send_response(200)
self.end_headers()
keep_running = False
httpd = BaseHTTPServer.HTTPServer(('', args.port), Handler)
while keep_running:
httpd.handle_request()
sys.stderr.flush()
print 'done'
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