devtools/httptest.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Fri, 07 Dec 2012 17:23:04 +0100
changeset 9030 c1d5e8ca15ea
parent 8941 7b26fe71404f
child 9036 cf519fd876c6
permissions -rw-r--r--
remove vreg argument to CWPublisher The passing a vreg to CWPublisher was used by test to allow reused of an existing vreg. We dropped this feature two commit ago and can safely removes it. Removing this argument allows later cleanup and improvement on the CWPublisher and Repository front. closes #2944813
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""this module contains base classes and utilities for integration with running
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http server
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"""
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__docformat__ = "restructuredtext en"
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import threading
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import socket
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import httplib
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from urlparse import urlparse
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from twisted.internet import reactor, error
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from cubicweb.etwist.server import run
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from cubicweb.devtools.testlib import CubicWebTC
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from cubicweb.devtools import ApptestConfiguration
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def get_available_port(ports_scan):
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    """return the first available port from the given ports range
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    Try to connect port by looking for refused connection (111) or transport
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    endpoint already connected (106) errors
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    Raise a RuntimeError if no port can be found
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    :type ports_range: list
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    :param ports_range: range of ports to test
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    :rtype: int
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    .. see:: :func:`test.test_support.bind_port`
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    """
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    for port in ports_scan:
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        try:
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            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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            sock = s.connect(("localhost", port))
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        except socket.error as err:
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            if err.args[0] in (111, 106):
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                return port
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        finally:
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            s.close()
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    raise RuntimeError('get_available_port([ports_range]) cannot find an available port')
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class CubicWebServerConfig(ApptestConfiguration):
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    """basic configuration class for configuring test server
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    Class attributes:
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    * `ports_range`: list giving range of http ports to test (range(7000, 8000)
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      by default). The first port found as available in `ports_range` will be
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      used to launch the test web server.
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    """
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    ports_range = range(7000, 8000)
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    def default_base_url(self):
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        port = self['port'] or get_available_port(self.ports_range)
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        self.global_set_option('port', port) # force rewrite here
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        return 'http://127.0.0.1:%d/' % self['port']
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    def pyro_enabled(self):
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        return False
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class CubicWebServerTC(CubicWebTC):
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    """Class for running test web server. See :class:`CubicWebServerConfig`.
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    Class attributes:
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    * `anonymous_allowed`: flag telling if anonymous browsing should be allowed
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    """
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    configcls = CubicWebServerConfig
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    # anonymous is logged by default in cubicweb test cases
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    anonymous_allowed = True
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    def start_server(self):
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        # use a semaphore to avoid starting test while the http server isn't
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        # fully initilialized
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        semaphore = threading.Semaphore(0)
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        def safe_run(*args, **kwargs):
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            try:
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                run(*args, **kwargs)
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            finally:
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                semaphore.release()
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   102
        reactor.addSystemEventTrigger('after', 'startup', semaphore.release)
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   103
        t = threading.Thread(target=safe_run, name='cubicweb_test_web_server',
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   104
                             args=(self.config, True))
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   105
        self.web_thread = t
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   106
        t.start()
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   107
        semaphore.acquire()
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   108
        if not self.web_thread.isAlive():
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   109
            # XXX race condition with actual thread death
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   110
            raise RuntimeError('Could not start the web server')
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   111
        #pre init utils connection
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   112
        parseurl = urlparse(self.config['base-url'])
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   113
        assert parseurl.port == self.config['port'], (self.config['base-url'], self.config['port'])
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   114
        self._web_test_cnx = httplib.HTTPConnection(parseurl.hostname,
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   115
                                                    parseurl.port)
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   116
        self._ident_cookie = None
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   117
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   118
    def stop_server(self, timeout=15):
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   119
        """Stop the webserver, waiting for the thread to return"""
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   120
        if self._web_test_cnx is None:
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   121
            self.web_logout()
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   122
            self._web_test_cnx.close()
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   123
        try:
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   124
            reactor.stop()
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   125
            self.web_thread.join(timeout)
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   126
            assert not self.web_thread.isAlive()
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   127
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   128
        finally:
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   129
            reactor.__init__()
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   130
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   131
    def web_login(self, user=None, passwd=None):
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   132
        """Log the current http session for the provided credential
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   133
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   134
        If no user is provided, admin connection are used.
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   135
        """
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   136
        if user is None:
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   137
            user  = self.admlogin
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   138
            passwd = self.admpassword
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   139
        if passwd is None:
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   140
            passwd = user
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   141
        self.login(user)
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   142
        response = self.web_get("login?__login=%s&__password=%s" %
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   143
                                (user, passwd))
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   144
        assert response.status == httplib.SEE_OTHER, response.status
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   145
        self._ident_cookie = response.getheader('Set-Cookie')
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   146
        assert self._ident_cookie
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   147
        return True
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   148
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   149
    def web_logout(self, user='admin', pwd=None):
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        """Log out current http user"""
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   151
        if self._ident_cookie is not None:
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   152
            response = self.web_get('logout')
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   153
        self._ident_cookie = None
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   154
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   155
    def web_request(self, path='', method='GET', body=None, headers=None):
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   156
        """Return an httplib.HTTPResponse object for the specified path
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   157
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   158
        Use available credential if available.
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   159
        """
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   160
        if headers is None:
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   161
            headers = {}
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   162
        if self._ident_cookie is not None:
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   163
            assert 'Cookie' not in headers
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   164
            headers['Cookie'] = self._ident_cookie
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   165
        self._web_test_cnx.request(method, '/' + path, headers=headers, body=body)
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   166
        response = self._web_test_cnx.getresponse()
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   167
        response.body = response.read() # to chain request
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   168
        response.read = lambda : response.body
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   169
        return response
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   170
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   171
    def web_get(self, path='', body=None, headers=None):
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   172
        return self.web_request(path=path, body=body, headers=headers)
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   173
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   174
    def setUp(self):
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   175
        super(CubicWebServerTC, self).setUp()
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   176
        self.start_server()
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   177
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   178
    def tearDown(self):
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   179
        try:
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   180
            self.stop_server()
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   181
        except error.ReactorNotRunning as err:
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   182
            # Server could be launched manually
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   183
            print err
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   184
        super(CubicWebServerTC, self).tearDown()
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   185
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   186
    @classmethod
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   187
    def init_config(cls, config):
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   188
        config.set_anonymous_allowed(cls.anonymous_allowed)
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   189
        super(CubicWebServerTC, cls).init_config(config)