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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.web.http_headers}.
"""
from __future__ import division, absolute_import
from twisted.trial.unittest import TestCase
from twisted.python.compat import _PY3, unicode
from twisted.web.http_headers import Headers
class BytesHeadersTests(TestCase):
"""
Tests for L{Headers}, using L{bytes} arguments for methods.
"""
def test_initializer(self):
"""
The header values passed to L{Headers.__init__} can be retrieved via
L{Headers.getRawHeaders}.
"""
h = Headers({b'Foo': [b'bar']})
self.assertEqual(h.getRawHeaders(b'foo'), [b'bar'])
def test_setRawHeaders(self):
"""
L{Headers.setRawHeaders} sets the header values for the given
header name to the sequence of byte string values.
"""
rawValue = [b"value1", b"value2"]
h = Headers()
h.setRawHeaders(b"test", rawValue)
self.assertTrue(h.hasHeader(b"test"))
self.assertTrue(h.hasHeader(b"Test"))
self.assertEqual(h.getRawHeaders(b"test"), rawValue)
def test_rawHeadersTypeChecking(self):
"""
L{Headers.setRawHeaders} requires values to be of type list.
"""
h = Headers()
self.assertRaises(TypeError, h.setRawHeaders, b'key', {b'Foo': b'bar'})
def test_addRawHeader(self):
"""
L{Headers.addRawHeader} adds a new value for a given header.
"""
h = Headers()
h.addRawHeader(b"test", b"lemur")
self.assertEqual(h.getRawHeaders(b"test"), [b"lemur"])
h.addRawHeader(b"test", b"panda")
self.assertEqual(h.getRawHeaders(b"test"), [b"lemur", b"panda"])
def test_getRawHeadersNoDefault(self):
"""
L{Headers.getRawHeaders} returns L{None} if the header is not found and
no default is specified.
"""
self.assertIsNone(Headers().getRawHeaders(b"test"))
def test_getRawHeadersDefaultValue(self):
"""
L{Headers.getRawHeaders} returns the specified default value when no
header is found.
"""
h = Headers()
default = object()
self.assertIdentical(h.getRawHeaders(b"test", default), default)
def test_getRawHeadersWithDefaultMatchingValue(self):
"""
If the object passed as the value list to L{Headers.setRawHeaders}
is later passed as a default to L{Headers.getRawHeaders}, the
result nevertheless contains encoded values.
"""
h = Headers()
default = [u"value"]
h.setRawHeaders(b"key", default)
self.assertIsInstance(h.getRawHeaders(b"key", default)[0], bytes)
self.assertEqual(h.getRawHeaders(b"key", default), [b"value"])
def test_getRawHeaders(self):
"""
L{Headers.getRawHeaders} returns the values which have been set for a
given header.
"""
h = Headers()
h.setRawHeaders(b"test", [b"lemur"])
self.assertEqual(h.getRawHeaders(b"test"), [b"lemur"])
self.assertEqual(h.getRawHeaders(b"Test"), [b"lemur"])
def test_hasHeaderTrue(self):
"""
Check that L{Headers.hasHeader} returns C{True} when the given header
is found.
"""
h = Headers()
h.setRawHeaders(b"test", [b"lemur"])
self.assertTrue(h.hasHeader(b"test"))
self.assertTrue(h.hasHeader(b"Test"))
def test_hasHeaderFalse(self):
"""
L{Headers.hasHeader} returns C{False} when the given header is not
found.
"""
self.assertFalse(Headers().hasHeader(b"test"))
def test_removeHeader(self):
"""
Check that L{Headers.removeHeader} removes the given header.
"""
h = Headers()
h.setRawHeaders(b"foo", [b"lemur"])
self.assertTrue(h.hasHeader(b"foo"))
h.removeHeader(b"foo")
self.assertFalse(h.hasHeader(b"foo"))
h.setRawHeaders(b"bar", [b"panda"])
self.assertTrue(h.hasHeader(b"bar"))
h.removeHeader(b"Bar")
self.assertFalse(h.hasHeader(b"bar"))
def test_removeHeaderDoesntExist(self):
"""
L{Headers.removeHeader} is a no-operation when the specified header is
not found.
"""
h = Headers()
h.removeHeader(b"test")
self.assertEqual(list(h.getAllRawHeaders()), [])
def test_canonicalNameCaps(self):
"""
L{Headers._canonicalNameCaps} returns the canonical capitalization for
the given header.
"""
h = Headers()
self.assertEqual(h._canonicalNameCaps(b"test"), b"Test")
self.assertEqual(h._canonicalNameCaps(b"test-stuff"), b"Test-Stuff")
self.assertEqual(h._canonicalNameCaps(b"content-md5"), b"Content-MD5")
self.assertEqual(h._canonicalNameCaps(b"dnt"), b"DNT")
self.assertEqual(h._canonicalNameCaps(b"etag"), b"ETag")
self.assertEqual(h._canonicalNameCaps(b"p3p"), b"P3P")
self.assertEqual(h._canonicalNameCaps(b"te"), b"TE")
self.assertEqual(h._canonicalNameCaps(b"www-authenticate"),
b"WWW-Authenticate")
self.assertEqual(h._canonicalNameCaps(b"x-xss-protection"),
b"X-XSS-Protection")
def test_getAllRawHeaders(self):
"""
L{Headers.getAllRawHeaders} returns an iterable of (k, v) pairs, where
C{k} is the canonicalized representation of the header name, and C{v}
is a sequence of values.
"""
h = Headers()
h.setRawHeaders(b"test", [b"lemurs"])
h.setRawHeaders(b"www-authenticate", [b"basic aksljdlk="])
allHeaders = set([(k, tuple(v)) for k, v in h.getAllRawHeaders()])
self.assertEqual(allHeaders,
set([(b"WWW-Authenticate", (b"basic aksljdlk=",)),
(b"Test", (b"lemurs",))]))
def test_headersComparison(self):
"""
A L{Headers} instance compares equal to itself and to another
L{Headers} instance with the same values.
"""
first = Headers()
first.setRawHeaders(b"foo", [b"panda"])
second = Headers()
second.setRawHeaders(b"foo", [b"panda"])
third = Headers()
third.setRawHeaders(b"foo", [b"lemur", b"panda"])
self.assertEqual(first, first)
self.assertEqual(first, second)
self.assertNotEqual(first, third)
def test_otherComparison(self):
"""
An instance of L{Headers} does not compare equal to other unrelated
objects.
"""
h = Headers()
self.assertNotEqual(h, ())
self.assertNotEqual(h, object())
self.assertNotEqual(h, b"foo")
def test_repr(self):
"""
The L{repr} of a L{Headers} instance shows the names and values of all
the headers it contains.
"""
foo = b"foo"
bar = b"bar"
baz = b"baz"
self.assertEqual(
repr(Headers({foo: [bar, baz]})),
"Headers({%r: [%r, %r]})" % (foo, bar, baz))
def test_reprWithRawBytes(self):
"""
The L{repr} of a L{Headers} instance shows the names and values of all
the headers it contains, not attempting to decode any raw bytes.
"""
# There's no such thing as undecodable latin-1, you'll just get
# some mojibake
foo = b"foo"
# But this is invalid UTF-8! So, any accidental decoding/encoding will
# throw an exception.
bar = b"bar\xe1"
baz = b"baz\xe1"
self.assertEqual(
repr(Headers({foo: [bar, baz]})),
"Headers({%r: [%r, %r]})" % (foo, bar, baz))
def test_subclassRepr(self):
"""
The L{repr} of an instance of a subclass of L{Headers} uses the name
of the subclass instead of the string C{"Headers"}.
"""
foo = b"foo"
bar = b"bar"
baz = b"baz"
class FunnyHeaders(Headers):
pass
self.assertEqual(
repr(FunnyHeaders({foo: [bar, baz]})),
"FunnyHeaders({%r: [%r, %r]})" % (foo, bar, baz))
def test_copy(self):
"""
L{Headers.copy} creates a new independent copy of an existing
L{Headers} instance, allowing future modifications without impacts
between the copies.
"""
h = Headers()
h.setRawHeaders(b'test', [b'foo'])
i = h.copy()
self.assertEqual(i.getRawHeaders(b'test'), [b'foo'])
h.addRawHeader(b'test', b'bar')
self.assertEqual(i.getRawHeaders(b'test'), [b'foo'])
i.addRawHeader(b'test', b'baz')
self.assertEqual(h.getRawHeaders(b'test'), [b'foo', b'bar'])
class UnicodeHeadersTests(TestCase):
"""
Tests for L{Headers}, using L{unicode} arguments for methods.
"""
def test_initializer(self):
"""
The header values passed to L{Headers.__init__} can be retrieved via
L{Headers.getRawHeaders}. If a L{bytes} argument is given, it returns
L{bytes} values, and if a L{unicode} argument is given, it returns
L{unicode} values. Both are the same header value, just encoded or
decoded.
"""
h = Headers({u'Foo': [u'bar']})
self.assertEqual(h.getRawHeaders(b'foo'), [b'bar'])
self.assertEqual(h.getRawHeaders(u'foo'), [u'bar'])
def test_setRawHeaders(self):
"""
L{Headers.setRawHeaders} sets the header values for the given
header name to the sequence of strings, encoded.
"""
rawValue = [u"value1", u"value2"]
rawEncodedValue = [b"value1", b"value2"]
h = Headers()
h.setRawHeaders("test", rawValue)
self.assertTrue(h.hasHeader(b"test"))
self.assertTrue(h.hasHeader(b"Test"))
self.assertTrue(h.hasHeader("test"))
self.assertTrue(h.hasHeader("Test"))
self.assertEqual(h.getRawHeaders("test"), rawValue)
self.assertEqual(h.getRawHeaders(b"test"), rawEncodedValue)
def test_nameNotEncodable(self):
"""
Passing L{unicode} to any function that takes a header name will encode
said header name as ISO-8859-1, and if it cannot be encoded, it will
raise a L{UnicodeDecodeError}.
"""
h = Headers()
# Only these two functions take names
with self.assertRaises(UnicodeEncodeError):
h.setRawHeaders(u"\u2603", [u"val"])
with self.assertRaises(UnicodeEncodeError):
h.hasHeader(u"\u2603")
def test_nameEncoding(self):
"""
Passing L{unicode} to any function that takes a header name will encode
said header name as ISO-8859-1.
"""
h = Headers()
# We set it using a Unicode string.
h.setRawHeaders(u"\u00E1", [b"foo"])
# It's encoded to the ISO-8859-1 value, which we can use to access it
self.assertTrue(h.hasHeader(b"\xe1"))
self.assertEqual(h.getRawHeaders(b"\xe1"), [b'foo'])
# We can still access it using the Unicode string..
self.assertTrue(h.hasHeader(u"\u00E1"))
def test_rawHeadersValueEncoding(self):
"""
Passing L{unicode} to L{Headers.setRawHeaders} will encode the name as
ISO-8859-1 and values as UTF-8.
"""
h = Headers()
h.setRawHeaders(u"\u00E1", [u"\u2603", b"foo"])
self.assertTrue(h.hasHeader(b"\xe1"))
self.assertEqual(h.getRawHeaders(b"\xe1"), [b'\xe2\x98\x83', b'foo'])
def test_rawHeadersTypeChecking(self):
"""
L{Headers.setRawHeaders} requires values to be of type list.
"""
h = Headers()
self.assertRaises(TypeError, h.setRawHeaders, u'key', {u'Foo': u'bar'})
def test_addRawHeader(self):
"""
L{Headers.addRawHeader} adds a new value for a given header.
"""
h = Headers()
h.addRawHeader(u"test", u"lemur")
self.assertEqual(h.getRawHeaders(u"test"), [u"lemur"])
h.addRawHeader(u"test", u"panda")
self.assertEqual(h.getRawHeaders(u"test"), [u"lemur", u"panda"])
self.assertEqual(h.getRawHeaders(b"test"), [b"lemur", b"panda"])
def test_getRawHeadersNoDefault(self):
"""
L{Headers.getRawHeaders} returns L{None} if the header is not found and
no default is specified.
"""
self.assertIsNone(Headers().getRawHeaders(u"test"))
def test_getRawHeadersDefaultValue(self):
"""
L{Headers.getRawHeaders} returns the specified default value when no
header is found.
"""
h = Headers()
default = object()
self.assertIdentical(h.getRawHeaders(u"test", default), default)
self.assertIdentical(h.getRawHeaders(u"test", None), None)
self.assertEqual(h.getRawHeaders(u"test", [None]), [None])
self.assertEqual(
h.getRawHeaders(u"test", [u"\N{SNOWMAN}"]),
[u"\N{SNOWMAN}"],
)
def test_getRawHeadersWithDefaultMatchingValue(self):
"""
If the object passed as the value list to L{Headers.setRawHeaders}
is later passed as a default to L{Headers.getRawHeaders}, the
result nevertheless contains decoded values.
"""
h = Headers()
default = [b"value"]
h.setRawHeaders(b"key", default)
self.assertIsInstance(h.getRawHeaders(u"key", default)[0], unicode)
self.assertEqual(h.getRawHeaders(u"key", default), [u"value"])
def test_getRawHeaders(self):
"""
L{Headers.getRawHeaders} returns the values which have been set for a
given header.
"""
h = Headers()
h.setRawHeaders(u"test\u00E1", [u"lemur"])
self.assertEqual(h.getRawHeaders(u"test\u00E1"), [u"lemur"])
self.assertEqual(h.getRawHeaders(u"Test\u00E1"), [u"lemur"])
self.assertEqual(h.getRawHeaders(b"test\xe1"), [b"lemur"])
self.assertEqual(h.getRawHeaders(b"Test\xe1"), [b"lemur"])
def test_hasHeaderTrue(self):
"""
Check that L{Headers.hasHeader} returns C{True} when the given header
is found.
"""
h = Headers()
h.setRawHeaders(u"test\u00E1", [u"lemur"])
self.assertTrue(h.hasHeader(u"test\u00E1"))
self.assertTrue(h.hasHeader(u"Test\u00E1"))
self.assertTrue(h.hasHeader(b"test\xe1"))
self.assertTrue(h.hasHeader(b"Test\xe1"))
def test_hasHeaderFalse(self):
"""
L{Headers.hasHeader} returns C{False} when the given header is not
found.
"""
self.assertFalse(Headers().hasHeader(u"test\u00E1"))
def test_removeHeader(self):
"""
Check that L{Headers.removeHeader} removes the given header.
"""
h = Headers()
h.setRawHeaders(u"foo", [u"lemur"])
self.assertTrue(h.hasHeader(u"foo"))
h.removeHeader(u"foo")
self.assertFalse(h.hasHeader(u"foo"))
self.assertFalse(h.hasHeader(b"foo"))
h.setRawHeaders(u"bar", [u"panda"])
self.assertTrue(h.hasHeader(u"bar"))
h.removeHeader(u"Bar")
self.assertFalse(h.hasHeader(u"bar"))
self.assertFalse(h.hasHeader(b"bar"))
def test_removeHeaderDoesntExist(self):
"""
L{Headers.removeHeader} is a no-operation when the specified header is
not found.
"""
h = Headers()
h.removeHeader(u"test")
self.assertEqual(list(h.getAllRawHeaders()), [])
def test_getAllRawHeaders(self):
"""
L{Headers.getAllRawHeaders} returns an iterable of (k, v) pairs, where
C{k} is the canonicalized representation of the header name, and C{v}
is a sequence of values.
"""
h = Headers()
h.setRawHeaders(u"test\u00E1", [u"lemurs"])
h.setRawHeaders(u"www-authenticate", [u"basic aksljdlk="])
h.setRawHeaders(u"content-md5", [u"kjdfdfgdfgnsd"])
allHeaders = set([(k, tuple(v)) for k, v in h.getAllRawHeaders()])
self.assertEqual(allHeaders,
set([(b"WWW-Authenticate", (b"basic aksljdlk=",)),
(b"Content-MD5", (b"kjdfdfgdfgnsd",)),
(b"Test\xe1", (b"lemurs",))]))
def test_headersComparison(self):
"""
A L{Headers} instance compares equal to itself and to another
L{Headers} instance with the same values.
"""
first = Headers()
first.setRawHeaders(u"foo\u00E1", [u"panda"])
second = Headers()
second.setRawHeaders(u"foo\u00E1", [u"panda"])
third = Headers()
third.setRawHeaders(u"foo\u00E1", [u"lemur", u"panda"])
self.assertEqual(first, first)
self.assertEqual(first, second)
self.assertNotEqual(first, third)
# Headers instantiated with bytes equivs are also the same
firstBytes = Headers()
firstBytes.setRawHeaders(b"foo\xe1", [b"panda"])
secondBytes = Headers()
secondBytes.setRawHeaders(b"foo\xe1", [b"panda"])
thirdBytes = Headers()
thirdBytes.setRawHeaders(b"foo\xe1", [b"lemur", u"panda"])
self.assertEqual(first, firstBytes)
self.assertEqual(second, secondBytes)
self.assertEqual(third, thirdBytes)
def test_otherComparison(self):
"""
An instance of L{Headers} does not compare equal to other unrelated
objects.
"""
h = Headers()
self.assertNotEqual(h, ())
self.assertNotEqual(h, object())
self.assertNotEqual(h, u"foo")
def test_repr(self):
"""
The L{repr} of a L{Headers} instance shows the names and values of all
the headers it contains. This shows only reprs of bytes values, as
undecodable headers may cause an exception.
"""
foo = u"foo\u00E1"
bar = u"bar\u2603"
baz = u"baz"
fooEncoded = "'foo\\xe1'"
barEncoded = "'bar\\xe2\\x98\\x83'"
if _PY3:
fooEncoded = "b" + fooEncoded
barEncoded = "b" + barEncoded
self.assertEqual(
repr(Headers({foo: [bar, baz]})),
"Headers({%s: [%s, %r]})" % (fooEncoded,
barEncoded,
baz.encode('utf8')))
def test_subclassRepr(self):
"""
The L{repr} of an instance of a subclass of L{Headers} uses the name
of the subclass instead of the string C{"Headers"}.
"""
foo = u"foo\u00E1"
bar = u"bar\u2603"
baz = u"baz"
fooEncoded = "'foo\\xe1'"
barEncoded = "'bar\\xe2\\x98\\x83'"
if _PY3:
fooEncoded = "b" + fooEncoded
barEncoded = "b" + barEncoded
class FunnyHeaders(Headers):
pass
self.assertEqual(
repr(FunnyHeaders({foo: [bar, baz]})),
"FunnyHeaders({%s: [%s, %r]})" % (fooEncoded,
barEncoded,
baz.encode('utf8')))
def test_copy(self):
"""
L{Headers.copy} creates a new independent copy of an existing
L{Headers} instance, allowing future modifications without impacts
between the copies.
"""
h = Headers()
h.setRawHeaders(u'test\u00E1', [u'foo\u2603'])
i = h.copy()
# The copy contains the same value as the original
self.assertEqual(i.getRawHeaders(u'test\u00E1'), [u'foo\u2603'])
self.assertEqual(i.getRawHeaders(b'test\xe1'), [b'foo\xe2\x98\x83'])
# Add a header to the original
h.addRawHeader(u'test\u00E1', u'bar')
# Verify that the copy has not changed
self.assertEqual(i.getRawHeaders(u'test\u00E1'), [u'foo\u2603'])
self.assertEqual(i.getRawHeaders(b'test\xe1'), [b'foo\xe2\x98\x83'])
# Add a header to the copy
i.addRawHeader(u'test\u00E1', b'baz')
# Verify that the orignal does not have it
self.assertEqual(
h.getRawHeaders(u'test\u00E1'), [u'foo\u2603', u'bar'])
self.assertEqual(
h.getRawHeaders(b'test\xe1'), [b'foo\xe2\x98\x83', b'bar'])