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# Copyright (C) 2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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#   1. Redistributions of source code must retain the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer.
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#
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#   2. Redistributions in binary form must reproduce the above
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#      copyright notice, this list of conditions and the following
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#      disclaimer in the documentation and/or other materials
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#      provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A. OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.
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from urlparse import urlparse
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def join_urls(*args):
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    """
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    Join arguments into a url.
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    >>> join_urls("http://www.test.org", "path")
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    'http://www.test.org/path'
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    >>> join_urls("http://www.test.org/", "path")
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    'http://www.test.org/path'
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    >>> join_urls("http://www.test.org", "/path")
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    'http://www.test.org/path'
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    >>> join_urls("http://www.test.org/", "/path")
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    'http://www.test.org/path'
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    >>> join_urls("http://www.test.org/", "/path/")
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    'http://www.test.org/path/'
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    >>> join_urls("http://www.test.org/a/b", "c/d")
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    'http://www.test.org/a/b/c/d'
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    >>> join_urls("http://www.test.org/a/b/", "c/d")
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    'http://www.test.org/a/b/c/d'
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    >>> join_urls("http://www.test.org/a/b", "/c/d")
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    'http://www.test.org/a/b/c/d'
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    >>> join_urls("http://www.test.org/a/b/", "/c/d")
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    'http://www.test.org/a/b/c/d'
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    >>> join_urls("http://www.test.org/a/b/", "/c/d/", "/e/f/")
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    'http://www.test.org/a/b/c/d/e/f/'
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    >>> join_urls("/path1", "/path")
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    '/path1/path'
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    >>> join_urls("path1", "/path")
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    'path1/path'
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    >>> join_urls("path1/")
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    'path1/'
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    >>> join_urls("path1/", "path2", "path3")
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    'path1/path2/path3'
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    >>> join_urls("", "path2", "path3")
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    'path2/path3'
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    >>> join_urls("", "", "")
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    ''
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    """
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    args = filter(bool, args)
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    if len(args) == 0:
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        return ''
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    if len(args) == 1:
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        return args[0]
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    return "/".join([args[0].rstrip("/")] +
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                    [a.strip("/") for a in args[1:-1]] +
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                    [args[-1].lstrip("/")])
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def parse_base_url(base_url):
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    """
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    >>> parse_base_url("https://one.two.three/four/five")
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    ('https://one.two.three', 'four/five')
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    >>> parse_base_url("https://one.two.three/four/five/")
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    ('https://one.two.three', 'four/five')
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    >>> parse_base_url("https://one.two.three/")
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    ('https://one.two.three', '')
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    >>> parse_base_url("https://one.two.three")
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    ('https://one.two.three', '')
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    """
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    parsed = urlparse(base_url)
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    base_path = parsed.path.strip('/')
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    base_host = parsed.scheme + '://' + parsed.netloc
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    return base_host, base_path
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if __name__ == "__main__":
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    import doctest
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    doctest.testmod()