devtools/httptest.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 22 Sep 2011 16:12:23 +0200
changeset 7827 9bbf83f68bcc
parent 7434 17ef6f9efaa1
child 8694 d901c36bcfce
permissions -rw-r--r--
[entity] upgrade fetch_[unrelated_]order to benefit from changes introduced in 3.14 (closes #1942758) of rql generation parts of the ORM now based on rql syntax tree. This allows more powerful and flexible sort control by giving them the syntax tree instead of manipulating string. Also: * prefix new methods by 'cw_' * fix cases that currently crash in 3.14 due to the refactoring
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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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from __future__ import with_statement
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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, 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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    def load_configuration(self):
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        super(CubicWebServerConfig, self).load_configuration()
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        self.global_set_option('force-html-content-type', True)
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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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   102
        def safe_run(*args, **kwargs):
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   103
            try:
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   104
                run(*args, **kwargs)
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   105
            finally:
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   106
                semaphore.release()
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   107
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   108
        reactor.addSystemEventTrigger('after', 'startup', semaphore.release)
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   109
        t = threading.Thread(target=safe_run, name='cubicweb_test_web_server',
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   110
                             args=(self.config, self.vreg, True))
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   111
        self.web_thread = t
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   112
        t.start()
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   113
        semaphore.acquire()
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   114
        if not self.web_thread.isAlive():
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   115
            # XXX race condition with actual thread death
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   116
            raise RuntimeError('Could not start the web server')
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   117
        #pre init utils connection
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        parseurl = urlparse(self.config['base-url'])
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        assert parseurl.port == self.config['port'], (self.config['base-url'], self.config['port'])
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        self._web_test_cnx = httplib.HTTPConnection(parseurl.hostname,
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   121
                                                    parseurl.port)
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   122
        self._ident_cookie = None
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   123
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   124
    def stop_server(self, timeout=15):
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        """Stop the webserver, waiting for the thread to return"""
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   126
        if self._web_test_cnx is None:
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   127
            self.web_logout()
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   128
            self._web_test_cnx.close()
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   129
        try:
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   130
            reactor.stop()
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   131
            self.web_thread.join(timeout)
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            assert not self.web_thread.isAlive()
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   133
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   134
        finally:
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   135
            reactor.__init__()
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   136
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   137
    def web_login(self, user=None, passwd=None):
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   138
        """Log the current http session for the provided credential
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   139
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   140
        If no user is provided, admin connection are used.
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   141
        """
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   142
        if user is None:
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   143
            user  = self.admlogin
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   144
            passwd = self.admpassword
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   145
        if passwd is None:
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   146
            passwd = user
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   147
        self.login(user)
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   148
        response = self.web_get("login?__login=%s&__password=%s" %
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   149
                                (user, passwd))
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        assert response.status == httplib.SEE_OTHER, response.status
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   151
        self._ident_cookie = response.getheader('Set-Cookie')
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   152
        assert self._ident_cookie
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   153
        return True
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   154
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   155
    def web_logout(self, user='admin', pwd=None):
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   156
        """Log out current http user"""
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   157
        if self._ident_cookie is not None:
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   158
            response = self.web_get('logout')
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   159
        self._ident_cookie = None
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   160
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   161
    def web_get(self, path='', headers=None):
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   162
        """Return an httplib.HTTPResponse object for the specified path
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   163
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   164
        Use available credential if available.
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   165
        """
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   166
        if headers is None:
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   167
            headers = {}
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   168
        if self._ident_cookie is not None:
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   169
            assert 'Cookie' not in headers
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   170
            headers['Cookie'] = self._ident_cookie
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   171
        self._web_test_cnx.request("GET", '/' + path, headers=headers)
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   172
        response = self._web_test_cnx.getresponse()
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   173
        response.body = response.read() # to chain request
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   174
        response.read = lambda : response.body
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   175
        return response
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   176
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   177
    def setUp(self):
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   178
        super(CubicWebServerTC, self).setUp()
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   179
        self.start_server()
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   180
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   181
    def tearDown(self):
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   182
        try:
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   183
            self.stop_server()
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   184
        except error.ReactorNotRunning, err:
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   185
            # Server could be launched manually
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   186
            print err
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   187
        super(CubicWebServerTC, self).tearDown()
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   188
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   189
    @classmethod
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   190
    def init_config(cls, config):
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   191
        config.set_anonymous_allowed(cls.anonymous_allowed)
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   192
        super(CubicWebServerTC, cls).init_config(config)