# Copyright (C) 2010-2012 Chris Ball <cjb@laptop.org>
# W. Trevor King <wking@drexel.edu>
#
# This file is part of Bugs Everywhere.
#
# Bugs Everywhere is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 2 of the License, or (at your option) any
# later version.
#
# Bugs Everywhere is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# Bugs Everywhere. If not, see <http://www.gnu.org/licenses/>.
"""Define the :class:`ServeCommands` serving BE Commands over HTTP.
See Also
--------
:py:meth:`be-libbe.command.base.Command._run_remote` : the associated client
"""
import logging
import os.path
import posixpath
import re
import urllib
import wsgiref.simple_server
import yaml
import libbe
import libbe.command
import libbe.command.base
import libbe.util.wsgi
import libbe.version
if libbe.TESTING:
import copy
import doctest
import StringIO
import sys
import unittest
import wsgiref.validate
try:
import cherrypy.test.webtest
cherrypy_test_webtest = True
except ImportError:
cherrypy_test_webtest = None
import libbe.bugdir
import libbe.command.list
class ServerApp (libbe.util.wsgi.WSGI_AppObject,
libbe.util.wsgi.WSGI_DataObject):
"""WSGI server for a BE Command invocation over HTTP.
RESTful_ WSGI request handler for serving the
libbe.command.base.Command._run_remote backend with GET, POST, and
HEAD commands.
This serves all commands from a single, persistant storage
instance, usually a VCS-based repository located on the local
machine.
"""
server_version = "BE-command-server/" + libbe.version.version()
def __init__(self, storage=None, notify=False, **kwargs):
super(ServerApp, self).__init__(
urls=[
(r'^run/?$', self.run),
],
**kwargs)
self.storage = storage
self.ui = libbe.command.base.UserInterface()
self.notify = notify
self.http_user_error = 418
# handlers
def run(self, environ, start_response):
self.check_login(environ)
data = self.post_data(environ)
source = 'post'
try:
name = data['command']
except KeyError:
raise libbe.util.wsgi.HandlerError(
self.http_user_error, 'UnknownCommand')
parameters = data.get('parameters', {})
try:
Class = libbe.command.get_command_class(command_name=name)
except libbe.command.UnknownCommand, e:
raise libbe.util.wsgi.HandlerError(
self.http_user_error, 'UnknownCommand {}'.format(e))
command = Class(ui=self.ui)
self.ui.setup_command(command)
arguments = [option.arg for option in command.options
if option.arg is not None]
arguments.extend(command.args)
for argument in arguments:
if argument.name not in parameters:
parameters[argument.name] = argument.default
command.status = command._run(**parameters) # already parsed params
assert command.status == 0, command.status
stdout = self.ui.io.get_stdout()
if self.notify: # TODO, check what notify does
self._notify(environ, 'run', command)
return self.ok_response(environ, start_response, stdout)
# handler utility functions
def _parse_post(self, post):
return yaml.safe_load(post)
def check_login(self, environ):
user = environ.get('be-auth.user', None)
if user is not None: # we're running under AuthenticationApp
if environ['REQUEST_METHOD'] == 'POST':
# TODO: better detection of commands requiring writes
if user == 'guest' or self.storage.is_writeable() == False:
raise _Unauthorized() # only non-guests allowed to write
# allow read-only commands for all users
def _notify(self, environ, command, id, params):
message = self._format_notification(environ, command, id, params)
self._submit_notification(message)
def _format_notification(self, environ, command, id, params):
key_length = len('command')
for key,value in params:
if len(key) > key_length and '\n' not in str(value):
key_length = len(key)
key_length += 1
lines = []
multi_line_params = []
for key,value in [('address', environ.get('REMOTE_ADDR', '-')),
('command', command), ('id', id)]+params:
v = str(value)
if '\n' in v:
multi_line_params.append((key,v))
continue
lines.append('%*.*s %s' % (key_length, key_length, key+':', v))
lines.append('')
for key,value in multi_line_params:
lines.extend(['=== START %s ===' % key, v,
'=== STOP %s ===' % key, ''])
lines.append('')
return '\n'.join(lines)
def _submit_notification(self, message):
libbe.util.subproc.invoke(self.notify, stdin=message, shell=True)
class ServeCommands (libbe.util.wsgi.ServerCommand):
"""Serve commands over HTTP.
This allows you to run local `be` commands interfacing with remote
data, transmitting command requests over the network.
:class:`~libbe.command.base.Command` wrapper around
:class:`ServerApp`.
"""
name = 'serve-commands'
def _get_app(self, logger, storage, **kwargs):
return ServerApp(
logger=logger, storage=storage, notify=kwargs.get('notify', False))
def _long_help(self):
return """
Example usage::
$ be serve-commands
And in another terminal (or after backgrounding the server)::
$ be --server http://localhost:8000/ list
If you bind your server to a public interface, take a look at the
``--read-only`` option or the combined ``--ssl --auth FILE``
options so other people can't mess with your repository. If you do use
authentication, you'll need to send in your username and password with,
for example::
$ be --repo http://username:password@localhost:8000/ list
"""
# alias for libbe.command.base.get_command_class()
Serve_commands = ServeCommands
if libbe.TESTING:
class ServerAppTestCase (libbe.util.wsgi.WSGITestCase):
def setUp(self):
libbe.util.wsgi.WSGITestCase.setUp(self)
self.bd = libbe.bugdir.SimpleBugDir(memory=False)
self.app = ServerApp(self.bd.storage, logger=self.logger)
def tearDown(self):
self.bd.cleanup()
libbe.util.wsgi.WSGITestCase.tearDown(self)
def test_run_list(self):
list = libbe.command.list.List()
params = list._parse_options_args()
data = yaml.safe_dump({
'command': 'list',
'parameters': params,
})
self.getURL(self.app, '/run', method='POST', data=data)
self.failUnless(self.status.startswith('200 '), self.status)
self.failUnless(
('Content-Type', 'application/octet-stream'
) in self.response_headers,
self.response_headers)
self.failUnless(self.exc_info == None, self.exc_info)
# TODO: integration tests on ServeCommands?
unitsuite =unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
suite = unittest.TestSuite([unitsuite, doctest.DocTestSuite()])
