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