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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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import BaseHTTPServer, SimpleHTTPServer, socket, errno, time
 
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import os
 
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from bzrlib.tests import TestCaseInTempDir
 
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from bzrlib.transport.http import HttpServer
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from bzrlib.osutils import relpath
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class WebserverNotAvailable(Exception):
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    pass
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class TestingHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
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    def log_message(self, format, *args):
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        self.server.test_case.log("webserver - %s - - [%s] %s",
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                                  self.address_string(),
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                                  self.log_date_time_string(),
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                                  format%args)
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    def handle_one_request(self):
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        """Handle a single HTTP request.
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        You normally don't need to override this method; see the class
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        __doc__ string for information on how to handle specific HTTP
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        commands such as GET and POST.
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        """
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        for i in xrange(1,11): # Don't try more than 10 times
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            try:
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                self.raw_requestline = self.rfile.readline()
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            except socket.error, e:
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                if e.args[0] in (errno.EAGAIN, errno.EWOULDBLOCK):
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                    # omitted for now because some tests look at the log of
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                    # the server and expect to see no errors.  see recent
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                    # email thread. -- mbp 20051021. 
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                    ## self.log_message('EAGAIN (%d) while reading from raw_requestline' % i)
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                    time.sleep(0.01)
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                    continue
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                raise
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            else:
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                break
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        if not self.raw_requestline:
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            self.close_connection = 1
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            return
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        if not self.parse_request(): # An error code has been sent, just exit
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            return
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        mname = 'do_' + self.command
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        if not hasattr(self, mname):
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            self.send_error(501, "Unsupported method (%r)" % self.command)
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            return
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        method = getattr(self, mname)
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        method()
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class TestingHTTPServer(BaseHTTPServer.HTTPServer):
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    def __init__(self, server_address, RequestHandlerClass, test_case):
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        BaseHTTPServer.HTTPServer.__init__(self, server_address,
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                                                RequestHandlerClass)
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        self.test_case = test_case
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class TestCaseWithWebserver(TestCaseInTempDir):
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    """Derived class that starts a localhost-only webserver
 
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    """Derived class that starts a localhost-only webserver.
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    (in addition to what TestCaseInTempDir does).
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    This is useful for testing RemoteBranch.
 
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    This is useful for testing things with a web server.
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    """
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    _HTTP_PORTS = range(13000, 0x8000)
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    def _http_start(self):
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        import SimpleHTTPServer, BaseHTTPServer, socket, errno
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        httpd = None
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        for port in self._HTTP_PORTS:
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            try:
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                httpd = TestingHTTPServer(('localhost', port),
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                                          TestingHTTPRequestHandler,
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                                          self)
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            except socket.error, e:
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                if e.args[0] == errno.EADDRINUSE:
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                    continue
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                print >>sys.stderr, "Cannot run webserver :-("
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                raise
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            else:
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                break
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        if httpd is None:
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            raise WebserverNotAvailable("Cannot run webserver :-( "
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                                        "no free ports in range %s..%s" %
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                                        (_HTTP_PORTS[0], _HTTP_PORTS[-1]))
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        self._http_base_url = 'http://localhost:%s/' % port
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        self._http_starting.release()
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        httpd.socket.settimeout(0.1)
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        while self._http_running:
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            try:
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                httpd.handle_request()
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            except socket.timeout:
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                pass
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    def get_remote_url(self, path):
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        import os
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        if os.path.isabs(path):
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            remote_path = relpath(self.test_dir, path)
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        else:
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            remote_path = path
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        self._http_starting.acquire()
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        self._http_starting.release()
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        return self._http_base_url + remote_path
 
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        return self.server.get_url() + remote_path
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    def setUp(self):
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        TestCaseInTempDir.setUp(self)
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        import threading, os
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        self._http_starting = threading.Lock()
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        self._http_starting.acquire()
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        self._http_running = True
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        self._http_base_url = None
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        self._http_thread = threading.Thread(target=self._http_start)
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        self._http_thread.setDaemon(True)
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        self._http_thread.start()
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        self._http_proxy = os.environ.get("http_proxy")
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        if self._http_proxy is not None:
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            del os.environ["http_proxy"]
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    def tearDown(self):
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        self._http_running = False
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        self._http_thread.join()
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        if self._http_proxy is not None:
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            import os
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            os.environ["http_proxy"] = self._http_proxy
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        TestCaseInTempDir.tearDown(self)
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        super(TestCaseWithWebserver, self).setUp()
 
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        self.server = HttpServer()
 
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        self.server.setUp()
 
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        self.addCleanup(self.server.tearDown)