from datetime import datetime
import sys

from django.http import HttpResponse, utils
from django.test import RequestFactory
from django.utils.datastructures import MultiValueDict
from django.utils import http
from django.utils import six
from django.utils import unittest


class TestUtilsHttp(unittest.TestCase):

    def test_same_origin_true(self):
        # Identical
        self.assertTrue(http.same_origin('http://foo.com/', 'http://foo.com/'))
        # One with trailing slash - see #15617
        self.assertTrue(http.same_origin('http://foo.com', 'http://foo.com/'))
        self.assertTrue(http.same_origin('http://foo.com/', 'http://foo.com'))
        # With port
        self.assertTrue(http.same_origin('https://foo.com:8000', 'https://foo.com:8000/'))

    def test_same_origin_false(self):
        # Different scheme
        self.assertFalse(http.same_origin('http://foo.com', 'https://foo.com'))
        # Different host
        self.assertFalse(http.same_origin('http://foo.com', 'http://goo.com'))
        # Different host again
        self.assertFalse(http.same_origin('http://foo.com', 'http://foo.com.evil.com'))
        # Different port
        self.assertFalse(http.same_origin('http://foo.com:8000', 'http://foo.com:8001'))

    def test_urlencode(self):
        # 2-tuples (the norm)
        result = http.urlencode((('a', 1), ('b', 2), ('c', 3)))
        self.assertEqual(result, 'a=1&b=2&c=3')

        # A dictionary
        result = http.urlencode({ 'a': 1, 'b': 2, 'c': 3})
        acceptable_results = [
            # Need to allow all of these as dictionaries have to be treated as
            # unordered
            'a=1&b=2&c=3',
            'a=1&c=3&b=2',
            'b=2&a=1&c=3',
            'b=2&c=3&a=1',
            'c=3&a=1&b=2',
            'c=3&b=2&a=1'
        ]
        self.assertTrue(result in acceptable_results)
        result = http.urlencode({'a': [1, 2]}, doseq=False)
        self.assertEqual(result, 'a=%5B%271%27%2C+%272%27%5D')
        result = http.urlencode({'a': [1, 2]}, doseq=True)
        self.assertEqual(result, 'a=1&a=2')
        result = http.urlencode({'a': []}, doseq=True)
        self.assertEqual(result, '')

        # A MultiValueDict
        result = http.urlencode(MultiValueDict({
            'name': ['Adrian', 'Simon'],
            'position': ['Developer']
        }), doseq=True)
        acceptable_results = [
            # MultiValueDicts are similarly unordered
            'name=Adrian&name=Simon&position=Developer',
            'position=Developer&name=Adrian&name=Simon'
        ]
        self.assertTrue(result in acceptable_results)

    def test_base36(self):
        # reciprocity works
        for n in [0, 1, 1000, 1000000]:
            self.assertEqual(n, http.base36_to_int(http.int_to_base36(n)))
        if six.PY2:
            self.assertEqual(sys.maxint, http.base36_to_int(http.int_to_base36(sys.maxint)))

        # bad input
        self.assertRaises(ValueError, http.int_to_base36, -1)
        if six.PY2:
            self.assertRaises(ValueError, http.int_to_base36, sys.maxint + 1)
        for n in ['1', 'foo', {1: 2}, (1, 2, 3), 3.141]:
            self.assertRaises(TypeError, http.int_to_base36, n)

        for n in ['#', ' ']:
            self.assertRaises(ValueError, http.base36_to_int, n)
        for n in [123, {1: 2}, (1, 2, 3), 3.141]:
            self.assertRaises(TypeError, http.base36_to_int, n)

        # more explicit output testing
        for n, b36 in [(0, '0'), (1, '1'), (42, '16'), (818469960, 'django')]:
            self.assertEqual(http.int_to_base36(n), b36)
            self.assertEqual(http.base36_to_int(b36), n)

    def test_is_safe_url(self):
        for bad_url in ('http://example.com',
                        'http:///example.com',
                        'https://example.com',
                        'ftp://exampel.com',
                        r'\\example.com',
                        r'\\\example.com',
                        r'/\\/example.com',
                        r'\\\example.com',
                        r'\\example.com',
                        r'\\//example.com',
                        r'/\/example.com',
                        r'\/example.com',
                        r'/\example.com',
                        'http:///example.com',
                        'http:/\//example.com',
                        'http:\/example.com',
                        'http:/\example.com',
                        'javascript:alert("XSS")',
                        '\njavascript:alert(x)'):
            self.assertFalse(http.is_safe_url(bad_url, host='testserver'), "%s should be blocked" % bad_url)
        for good_url in ('/view/?param=http://example.com',
                     '/view/?param=https://example.com',
                     '/view?param=ftp://exampel.com',
                     'view/?param=//example.com',
                     'https://testserver/',
                     'HTTPS://testserver/',
                     '//testserver/',
                     '/url%20with%20spaces/'):
            self.assertTrue(http.is_safe_url(good_url, host='testserver'), "%s should be allowed" % good_url)

class ETagProcessingTests(unittest.TestCase):
    def testParsing(self):
        etags = http.parse_etags(r'"", "etag", "e\"t\"ag", "e\\tag", W/"weak"')
        self.assertEqual(etags, ['', 'etag', 'e"t"ag', r'e\tag', 'weak'])

    def testQuoting(self):
        quoted_etag = http.quote_etag(r'e\t"ag')
        self.assertEqual(quoted_etag, r'"e\\t\"ag"')


class HttpDateProcessingTests(unittest.TestCase):
    def testParsingRfc1123(self):
        parsed = http.parse_http_date('Sun, 06 Nov 1994 08:49:37 GMT')
        self.assertEqual(datetime.utcfromtimestamp(parsed),
                         datetime(1994, 11, 6, 8, 49, 37))

    def testParsingRfc850(self):
        parsed = http.parse_http_date('Sunday, 06-Nov-94 08:49:37 GMT')
        self.assertEqual(datetime.utcfromtimestamp(parsed),
                         datetime(1994, 11, 6, 8, 49, 37))

    def testParsingAsctime(self):
        parsed = http.parse_http_date('Sun Nov  6 08:49:37 1994')
        self.assertEqual(datetime.utcfromtimestamp(parsed),
                         datetime(1994, 11, 6, 8, 49, 37))
