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import os.path
import unittest
import socket
import sys

from webhttp.config import config
import webhttp.message
import webhttp.parser


portnr = 8001


class TestGetRequests(unittest.TestCase):
    """Test cases for GET requests"""

    def setUp(self):
        """Prepare for testing"""
        self.client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.client_socket.connect(("localhost", portnr))
        self.parser = webhttp.parser.ResponseParser()
        self.default_headers = [
                ('Host', 'localhost:%d' % portnr),
                ('Connection', 'close')
                ]

        config().read(os.path.expanduser('~/.webpy.ini'))

    def tearDown(self):
        """Clean up after testing"""
        self.client_socket.shutdown(socket.SHUT_RDWR)
        self.client_socket.close()

    def request(self, method, uri, headers):
        request = webhttp.message.Request()
        request.method = method
        request.uri = uri
        for name, value in headers:
            request.set_header(name, value)

        self.client_socket.send(str(request))

        message = self.client_socket.recv(1024)
        response = self.parser.parse_response(message)
        
        return response

    def test_existing_file(self):
        """GET for a single resource that exists"""
        response = self.request(
                'GET', '/test/index.html', self.default_headers)
        self.assertEqual(response.code, 200)
        self.assertTrue(response.body)

    def test_nonexistant_file(self):
        """GET for a single resource that does not exist"""
        response = self.request(
                'GET', '/test/nonexistant.html', self.default_headers)
        self.assertEqual(response.code, 404)
        self.assertTrue(response.body)

    def test_caching(self):
        """GET for an existing single resource followed by a GET for that same
        resource with caching utilized on the client/tester side
        """
        response = self.request('GET', '/test', self.default_headers)

        response = self.request('GET', '/test', self.default_headers + \
                [('If-None-Match', 'invalid-etag')])
        self.assertEqual(response.code, 200, 'If-None-Match returns 200')
        
        response = self.request('GET', '/test', self.default_headers + \
                [('If-None-Match', response.get_header('ETag'))])
        self.assertEqual(response.code, 304, 'If-None-Match returns 304')

        response = self.request('GET', '/test', self.default_headers + \
                [('If-Match', response.get_header('ETag'))])
        self.assertEqual(response.code, 200, 'If-Match returns 200')
        
        response = self.request('GET', '/test', self.default_headers + \
                [('If-Match', 'invalid-etag')])
        self.assertEqual(response.code, 304, 'If-Match returns 304')

    def test_extisting_index_file(self):
        """GET for a directory with an existing index.html file"""
        self.assertEqual(self.request('GET', '/test', self.default_headers),
                self.request('GET', '/test/index.html', self.default_headers))

    def test_nonexistant_index_file(self):
        """GET for a directory with a non-existant index.html file"""
        response = self.request('GET', '/test/no-index', self.default_headers)
        self.assertEqual(response.code, 403)
        self.assertTrue(response.body)

    def test_error_page(self):
        r1 = self.request('GET', '/test/nonexistant', self.default_headers)
        r2 = self.request('GET', config('error404'), self.default_headers)
        self.assertEqual(r1.body, r2.body)

    def test_persistent_close(self):
        """Multiple GETs over the same (persistent) connection with the last
        GET prompting closing the connection, the connection should be closed.
        """
        pass

    def test_persistent_timeout(self):
        """Multiple GETs over the same (persistent) connection, followed by a
        wait during which the connection times out, the connection should be
        closed.
        """
        pass

    def test_encoding(self):
        """GET which requests an existing resource using gzip encodign, which
        is accepted by the server.
        """
        r1 = self.request('GET', '/test', self.default_headers + \
                [('Accept-Encoding', 'gzip;q=1, identity;q=0')])
        self.assertEqual(r1.get_header('Content-Encoding'), 'gzip')
        r1.decompress()
        r2 = self.request('GET', '/test', self.default_headers + \
                [('Accept-Encoding', '')])
        self.assertEqual(r1.body, r2.body)
        pass

    def test_doubledot(self):
        response = self.request('GET', '/../test', self.default_headers)
        self.assertEquals(response.code, 403)


if __name__ == "__main__":
    # Parse command line arguments
    import argparse
    parser = argparse.ArgumentParser(description="HTTP Tests")
    parser.add_argument("-p", "--port", type=int, default=8001)
    
    # Arguments for the unittest framework
    parser.add_argument('unittest_args', nargs='*')
    args = parser.parse_args()

    portnr = args.port
    
    # Only pass the unittest arguments to unittest
    sys.argv[1:] = args.unittest_args

    # Start test suite
    unittest.main()