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#!/usr/bin/env python3
#
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Provides a convenient wrapper for spawning a test lighttpd instance.
Usage:
lighttpd_server PATH_TO_DOC_ROOT
"""
from __future__ import print_function
import codecs
import contextlib
import os
import random
import shutil
import socket
import subprocess
import sys
import tempfile
import time
from six.moves import http_client
from six.moves import input # pylint: disable=redefined-builtin
from pylib import constants
from pylib import pexpect
class LighttpdServer(object):
"""Wraps lighttpd server, providing robust startup.
Args:
document_root: Path to root of this server's hosted files.
port: TCP port on the _host_ machine that the server will listen on. If
omitted it will attempt to use 9000, or if unavailable it will find
a free port from 8001 - 8999.
lighttpd_path, lighttpd_module_path: Optional paths to lighttpd binaries.
base_config_path: If supplied this file will replace the built-in default
lighttpd config file.
extra_config_contents: If specified, this string will be appended to the
base config (default built-in, or from base_config_path).
config_path, error_log, access_log: Optional paths where the class should
place temporary files for this session.
"""
def __init__(self, document_root, port=None,
lighttpd_path=None, lighttpd_module_path=None,
base_config_path=None, extra_config_contents=None,
config_path=None, error_log=None, access_log=None):
self.temp_dir = tempfile.mkdtemp(prefix='lighttpd_for_chrome_android')
self.document_root = os.path.abspath(document_root)
self.fixed_port = port
self.port = port or constants.LIGHTTPD_DEFAULT_PORT
self.server_tag = 'LightTPD ' + str(random.randint(111111, 999999))
self.lighttpd_path = lighttpd_path or '/usr/sbin/lighttpd'
self.lighttpd_module_path = lighttpd_module_path or '/usr/lib/lighttpd'
self.base_config_path = base_config_path
self.extra_config_contents = extra_config_contents
self.config_path = config_path or self._Mktmp('config')
self.error_log = error_log or self._Mktmp('error_log')
self.access_log = access_log or self._Mktmp('access_log')
self.pid_file = self._Mktmp('pid_file')
self.process = None
def _Mktmp(self, name):
return os.path.join(self.temp_dir, name)
@staticmethod
def _GetRandomPort():
# The ports of test server is arranged in constants.py.
return random.randint(constants.LIGHTTPD_RANDOM_PORT_FIRST,
constants.LIGHTTPD_RANDOM_PORT_LAST)
def StartupHttpServer(self):
"""Starts up a http server with specified document root and port."""
# If we want a specific port, make sure no one else is listening on it.
if self.fixed_port:
self._KillProcessListeningOnPort(self.fixed_port)
while True:
if self.base_config_path:
# Read the config
with codecs.open(self.base_config_path, 'r', 'utf-8') as f:
config_contents = f.read()
else:
config_contents = self._GetDefaultBaseConfig()
if self.extra_config_contents:
config_contents += self.extra_config_contents
# Write out the config, filling in placeholders from the members of |self|
with codecs.open(self.config_path, 'w', 'utf-8') as f:
f.write(config_contents % self.__dict__)
if (not os.path.exists(self.lighttpd_path) or
not os.access(self.lighttpd_path, os.X_OK)):
raise EnvironmentError(
'Could not find lighttpd at %s.\n'
'It may need to be installed (e.g. sudo apt-get install lighttpd)'
% self.lighttpd_path)
# pylint: disable=no-member
self.process = pexpect.spawn(self.lighttpd_path,
['-D', '-f', self.config_path,
'-m', self.lighttpd_module_path],
cwd=self.temp_dir)
client_error, server_error = self._TestServerConnection()
if not client_error:
assert int(open(self.pid_file, 'r').read()) == self.process.pid
break
self.process.close()
if self.fixed_port or 'in use' not in server_error:
print('Client error:', client_error)
print('Server error:', server_error)
return False
self.port = self._GetRandomPort()
return True
def ShutdownHttpServer(self):
"""Shuts down our lighttpd processes."""
if self.process:
self.process.terminate()
shutil.rmtree(self.temp_dir, ignore_errors=True)
def _TestServerConnection(self):
# Wait for server to start
server_msg = ''
for timeout in range(1, 5):
client_error = None
try:
with contextlib.closing(
http_client.HTTPConnection('127.0.0.1', self.port,
timeout=timeout)) as http:
http.set_debuglevel(timeout > 3)
http.request('HEAD', '/')
r = http.getresponse()
r.read()
if (r.status == 200 and r.reason == 'OK' and
r.getheader('Server') == self.server_tag):
return (None, server_msg)
client_error = ('Bad response: %s %s version %s\n ' %
(r.status, r.reason, r.version) +
'\n '.join([': '.join(h) for h in r.getheaders()]))
except (http_client.HTTPException, socket.error) as client_error:
pass # Probably too quick connecting: try again
# Check for server startup error messages
# pylint: disable=no-member
ix = self.process.expect([pexpect.TIMEOUT, pexpect.EOF, '.+'],
timeout=timeout)
if ix == 2: # stdout spew from the server
server_msg += self.process.match.group(0) # pylint: disable=no-member
elif ix == 1: # EOF -- server has quit so giveup.
client_error = client_error or 'Server exited'
break
return (client_error or 'Timeout', server_msg)
@staticmethod
def _KillProcessListeningOnPort(port):
"""Checks if there is a process listening on port number |port| and
terminates it if found.
Args:
port: Port number to check.
"""
if subprocess.call(['fuser', '-kv', '%d/tcp' % port]) == 0:
# Give the process some time to terminate and check that it is gone.
time.sleep(2)
assert subprocess.call(['fuser', '-v', '%d/tcp' % port]) != 0, \
'Unable to kill process listening on port %d.' % port
@staticmethod
def _GetDefaultBaseConfig():
return """server.tag = "%(server_tag)s"
server.modules = ( "mod_access",
"mod_accesslog",
"mod_alias",
"mod_cgi",
"mod_rewrite" )
# default document root required
#server.document-root = "."
# files to check for if .../ is requested
index-file.names = ( "index.php", "index.pl", "index.cgi",
"index.html", "index.htm", "default.htm" )
# mimetype mapping
mimetype.assign = (
".gif" => "image/gif",
".jpg" => "image/jpeg",
".jpeg" => "image/jpeg",
".png" => "image/png",
".svg" => "image/svg+xml",
".css" => "text/css",
".html" => "text/html",
".htm" => "text/html",
".xhtml" => "application/xhtml+xml",
".xhtmlmp" => "application/vnd.wap.xhtml+xml",
".js" => "application/x-javascript",
".log" => "text/plain",
".conf" => "text/plain",
".text" => "text/plain",
".txt" => "text/plain",
".dtd" => "text/xml",
".xml" => "text/xml",
".manifest" => "text/cache-manifest",
)
# Use the "Content-Type" extended attribute to obtain mime type if possible
mimetype.use-xattr = "enable"
##
# which extensions should not be handle via static-file transfer
#
# .php, .pl, .fcgi are most often handled by mod_fastcgi or mod_cgi
static-file.exclude-extensions = ( ".php", ".pl", ".cgi" )
server.bind = "127.0.0.1"
server.port = %(port)s
## virtual directory listings
dir-listing.activate = "enable"
#dir-listing.encoding = "iso-8859-2"
#dir-listing.external-css = "style/oldstyle.css"
## enable debugging
#debug.log-request-header = "enable"
#debug.log-response-header = "enable"
#debug.log-request-handling = "enable"
#debug.log-file-not-found = "enable"
#### SSL engine
#ssl.engine = "enable"
#ssl.pemfile = "server.pem"
# Autogenerated test-specific config follows.
cgi.assign = ( ".cgi" => "/usr/bin/env",
".pl" => "/usr/bin/env",
".asis" => "/bin/cat",
".php" => "/usr/bin/php-cgi" )
server.errorlog = "%(error_log)s"
accesslog.filename = "%(access_log)s"
server.upload-dirs = ( "/tmp" )
server.pid-file = "%(pid_file)s"
server.document-root = "%(document_root)s"
"""
def main(argv):
server = LighttpdServer(*argv[1:])
try:
if server.StartupHttpServer():
input('Server running at http://127.0.0.1:%s -'
' press Enter to exit it.' % server.port)
else:
print('Server exit code:', server.process.exitstatus)
finally:
server.ShutdownHttpServer()
if __name__ == '__main__':
sys.exit(main(sys.argv))
|
