# Copyright 2014 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""Tests for `glance.wsgi`."""

import re
import socket
import time

from oslo.config import cfg
import testtools

from glance.common import wsgi

CONF = cfg.CONF


class TestWSGIServer(testtools.TestCase):
    """WSGI server tests."""
    def test_client_socket_timeout(self):
        CONF.set_default("workers", 0)
        CONF.set_default("client_socket_timeout", 0.1)
        """Verify connections are timed out as per 'client_socket_timeout'"""
        greetings = 'Hello, World!!!'

        def hello_world(env, start_response):
            start_response('200 OK', [('Content-Type', 'text/plain')])
            return [greetings]

        server = wsgi.Server()
        server.start(hello_world, 0)
        port = server.sock.getsockname()[1]
        sock1 = socket.socket()
        sock1.connect(("127.0.0.1", port))

        fd = sock1.makefile('rw')
        fd.write(b'GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        fd.flush()

        buf = fd.read()
        # Should succeed - no timeout
        self.assertTrue(re.search(greetings, buf))

        sock2 = socket.socket()
        sock2.connect(("127.0.0.1", port))
        time.sleep(0.2)

        fd = sock2.makefile('rw')
        fd.write(b'GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        fd.flush()

        buf = fd.read()
        # Should fail - connection timed out so we get nothing from the server
        self.assertFalse(buf)