#!/usr/bin/env python # # 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 """ import codecs import contextlib import httplib import os import random import shutil import socket import subprocess import sys import tempfile import time 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) 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 not 'in use' 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 xrange(1, 5): client_error = None try: with contextlib.closing(httplib.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 (httplib.HTTPException, socket.error) as client_error: pass # Probably too quick connecting: try again # Check for server startup error messages 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(): raw_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))