| #!/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 |
| from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler |
| import hashlib |
| import os |
| import socket |
| import sys |
| import time |
| import random |
| from SocketServer import ThreadingMixIn |
| import threading |
| import platform |
| |
| |
| # 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 = 20 |
| |
| |
| 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 = {} |
| mu = threading.Lock() |
| |
| def can_connect(port): |
| # this test is only really useful on unices where SO_REUSE_PORT is available |
| # so on Windows, where this test is expensive, skip it |
| if platform.system() == 'Windows': return False |
| s = socket.socket() |
| try: |
| s.connect(('localhost', port)) |
| return True |
| except socket.error, e: |
| return False |
| finally: |
| s.close() |
| |
| def can_bind(port, proto): |
| s = socket.socket(proto, socket.SOCK_STREAM) |
| s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
| try: |
| s.bind(('localhost', port)) |
| return True |
| except socket.error, e: |
| return False |
| finally: |
| s.close() |
| |
| |
| def refill_pool(max_timeout, req): |
| """Scan for ports not marked for being in use""" |
| chk = list(range(1025, 32766)) |
| random.shuffle(chk) |
| for i in chk: |
| 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] |
| if can_bind(i, socket.AF_INET) and can_bind(i, socket.AF_INET6) and not can_connect(i): |
| req.log_message("found available port %d" % i) |
| pool.append(i) |
| |
| |
| def allocate_port(req): |
| global pool |
| global in_use |
| global mu |
| mu.acquire() |
| max_timeout = 600 |
| while not pool: |
| refill_pool(max_timeout, req) |
| if not pool: |
| req.log_message("failed to find ports: retrying soon") |
| mu.release() |
| time.sleep(1) |
| mu.acquire() |
| max_timeout /= 2 |
| port = pool[0] |
| pool = pool[1:] |
| in_use[port] = time.time() |
| mu.release() |
| return port |
| |
| |
| keep_running = True |
| |
| |
| class Handler(BaseHTTPRequestHandler): |
| |
| def setup(self): |
| # If the client is unreachable for 5 seconds, close the connection |
| self.timeout = 5 |
| BaseHTTPRequestHandler.setup(self) |
| |
| def do_GET(self): |
| global keep_running |
| global mu |
| 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:]) |
| mu.acquire() |
| if p in in_use: |
| del in_use[p] |
| pool.append(p) |
| k = 'known' |
| else: |
| k = 'unknown' |
| mu.release() |
| self.log_message('drop %s port %d' % (k, 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() |
| mu.acquire() |
| now = time.time() |
| out = yaml.dump({'pool': pool, 'in_use': dict((k, now - v) for k, v in in_use.items())}) |
| mu.release() |
| self.wfile.write(out) |
| elif self.path == '/quitquitquit': |
| self.send_response(200) |
| self.end_headers() |
| self.server.shutdown() |
| |
| class ThreadedHTTPServer(ThreadingMixIn, HTTPServer): |
| """Handle requests in a separate thread""" |
| |
| ThreadedHTTPServer(('', args.port), Handler).serve_forever() |