~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005 by Canonical Ltd

# This program 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.

# This program 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 this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import BaseHTTPServer, SimpleHTTPServer, socket, errno, time

from bzrlib.selftest import TestCaseInTempDir

class WebserverNotAvailable(Exception):

    pass

class BadWebserverPath(ValueError):

    def __str__(self):

        return 'path %s is not in %s' % self.args

class TestingHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):

    def log_message(self, format, *args):

        self.server.test_case.log("webserver - %s - - [%s] %s" %

                                  (self.address_string(),

                                   self.log_date_time_string(),

                                   format%args))

    def handle_one_request(self):

        """Handle a single HTTP request.

        You normally don't need to override this method; see the class

        __doc__ string for information on how to handle specific HTTP

        commands such as GET and POST.

        """

        for i in xrange(1,11): # Don't try more than 10 times

            try:

                self.raw_requestline = self.rfile.readline()

            except socket.error, e:

                if e.args[0] in (errno.EAGAIN, errno.EWOULDBLOCK):

                    # omitted for now because some tests look at the log of

                    # the server and expect to see no errors.  see recent

                    # email thread. -- mbp 20051021. 

                    ## self.log_message('EAGAIN (%d) while reading from raw_requestline' % i)

                    time.sleep(0.01)

                    continue

                raise

            else:

                break

        if not self.raw_requestline:

            self.close_connection = 1

            return

        if not self.parse_request(): # An error code has been sent, just exit

            return

        mname = 'do_' + self.command

        if not hasattr(self, mname):

            self.send_error(501, "Unsupported method (%r)" % self.command)

            return

        method = getattr(self, mname)

        method()

class TestingHTTPServer(BaseHTTPServer.HTTPServer):

    def __init__(self, server_address, RequestHandlerClass, test_case):

        BaseHTTPServer.HTTPServer.__init__(self, server_address,

                                                RequestHandlerClass)

        self.test_case = test_case

class TestCaseWithWebserver(TestCaseInTempDir):

    """Derived class that starts a localhost-only webserver

    (in addition to what TestCaseInTempDir does).

    This is useful for testing RemoteBranch.

    """

    _HTTP_PORTS = range(13000, 0x8000)

    def _http_start(self):

        import SimpleHTTPServer, BaseHTTPServer, socket, errno

        httpd = None

        for port in self._HTTP_PORTS:

            try:

                httpd = TestingHTTPServer(('localhost', port),

                                          TestingHTTPRequestHandler,

                                          self)

            except socket.error, e:

                if e.args[0] == errno.EADDRINUSE:

                    continue

                print >>sys.stderr, "Cannot run webserver :-("

                raise

            else:

                break

        if httpd is None:

            raise WebserverNotAvailable("Cannot run webserver :-( "

                                        "no free ports in range %s..%s" %

                                        (_HTTP_PORTS[0], _HTTP_PORTS[-1]))

        self._http_base_url = 'http://localhost:%s/' % port

        self._http_starting.release()

        httpd.socket.settimeout(0.1)

        while self._http_running:

            try:

                httpd.handle_request()

            except socket.timeout:

                pass

    def get_remote_url(self, path):

        import os

        path_parts = path.split(os.path.sep)

        if os.path.isabs(path):

            if path_parts[:len(self._local_path_parts)] != \

                   self._local_path_parts:

                raise BadWebserverPath(path, self.test_dir)

            remote_path = '/'.join(path_parts[len(self._local_path_parts):])

        else:

            remote_path = '/'.join(path_parts)

        self._http_starting.acquire()

        self._http_starting.release()

        return self._http_base_url + remote_path

    def setUp(self):

        TestCaseInTempDir.setUp(self)

        import threading, os

        self._local_path_parts = self.test_dir.split(os.path.sep)

        self._http_starting = threading.Lock()

        self._http_starting.acquire()

        self._http_running = True

        self._http_base_url = None

        self._http_thread = threading.Thread(target=self._http_start)

        self._http_thread.setDaemon(True)

        self._http_thread.start()

        self._http_proxy = os.environ.get("http_proxy")

        if self._http_proxy is not None:

            del os.environ["http_proxy"]

    def tearDown(self):

        self._http_running = False

        self._http_thread.join()

        if self._http_proxy is not None:

            import os

            os.environ["http_proxy"] = self._http_proxy

        TestCaseInTempDir.tearDown(self)