test_urllib2.py 文件源码

def test_request_headers_methods():
    """
    Note the case normalization of header names here, to .capitalize()-case.
    This should be preserved for backwards-compatibility.  (In the HTTP case,
    normalization to .title()-case is done by urllib2 before sending headers to
    httplib).

    >>> url = "http://example.com"
    >>> r = Request(url, headers={"Spam-eggs": "blah"})
    >>> r.has_header("Spam-eggs")
    True
    >>> r.header_items()
    [('Spam-eggs', 'blah')]
    >>> r.add_header("Foo-Bar", "baz")
    >>> items = r.header_items()
    >>> items.sort()
    >>> items
    [('Foo-bar', 'baz'), ('Spam-eggs', 'blah')]

    Note that e.g. r.has_header("spam-EggS") is currently False, and
    r.get_header("spam-EggS") returns None, but that could be changed in
    future.

    >>> r.has_header("Not-there")
    False
    >>> print r.get_header("Not-there")
    None
    >>> r.get_header("Not-there", "default")
    'default'

    """