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import os.path
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def get_site_url (script_name) :
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"""
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Get the URL that points to the site root (i.e. where style.css is) using the given value of SCRIPT_NAME
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/foo/bar/quux.py -> /foo
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/~terom/qmsk.net/site/index.py -> /~terom/qmsk.net
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None -> /
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"""
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if script_name :
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return os.path.dirname(os.path.dirname(script_name))
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else :
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return "/"
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def get_page_path (path_info, default) :
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"""
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Get the path of the page that was requested, or the given default is empty/invalid.
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The path will never begin with an /.
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/quux -> quux
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/ -> <default>
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None -> <default>
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"""
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if path_info :
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# remove prefixed slashes
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path_info = path_info.lstrip('/')
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if path_info :
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return path_info
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else :
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return default
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class Request (object) :
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# The name of the site itself, this can be used to reference e.g. style.css
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site_url = None
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# The page root url, for links to pages
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page_root = None
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# The full path to the requested page
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page_path = None
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def __init__ (self, environ, default_page='main') :
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self.site_url = get_site_url(environ.get("SCRIPT_NAME"))
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self.page_root = environ.get("SCRIPT_NAME")
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self.page_path = get_page_path(environ.get("PATH_INFO"), default_page)
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def page_name_parts (self) :
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"""
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Returns a list of page name components
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"""
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return self.page_path.split('/')
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def page_name_prefixes (self) :
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"""
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Iterate over the components of the page name, yielding (prefix, suffix) pairs
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"""
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prefix = self.page_name_parts()
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suffix = []
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while prefix :
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yield ('/'.join(prefix), '/'.join(suffix))
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suffix.insert(0, prefix.pop(-1))
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