\_SB_.CPUS.C007
  "   €l–Яi~”Ji?u2 \ё®х1hЯГѓm·\ВБ И    """Miscellaneous WSGI-related Utilities"""

import posixpath

__all__ = [
    'FileWrapper', 'guess_scheme', 'application_uri', 'request_uri',
    'shift_path_info', 'setup_testing_defaults',
]


class FileWrapper:
    """Wrapper to convert file-like objects to iterables"""

    def __init__(self, filelike, blksize=8192):
        self.filelike = filelike
        self.blksize = blksize
        if hasattr(filelike,'close'):
            self.close = filelike.close

    def __getitem__(self,key):
        data = self.filelike.read(self.blksize)
        if data:
            return data
        raise IndexError

    def __iter__(self):
        return self

    def next(self):
        data = self.filelike.read(self.blksize)
        if data:
            return data
        raise StopIteration

def guess_scheme(environ):
    """Return a guess for whether 'wsgi.url_scheme' should be 'http' or 'https'
    """
    if environ.get("HTTPS") in ('yes','on','1'):
        return 'https'
    else:
        return 'http'

def application_uri(environ):
    """Return the application's base URI (no PATH_INFO or QUERY_STRING)"""
    url = environ['wsgi.url_scheme']+'://'
    from urllib import quote

    if environ.get('HTTP_HOST'):
        url += environ['HTTP_HOST']
    else:
        url += environ['SERVER_NAME']

        if environ['wsgi.url_scheme'] == 'https':
            if environ['SERVER_PORT'] != '443':
                url += ':' + environ['SERVER_PORT']
        else:
            if environ['SERVER_PORT'] != '80':
                url += ':' + environ['SERVER_PORT']

    url += quote(environ.get('SCRIPT_NAME') or '/')
    return url

def request_uri(environ, include_query=1):
    """Return the full request URI, optionally including the query string"""
    url = application_uri(environ)
    from urllib import quote
    path_info = quote(environ.get('PATH_INFO',''),safe='/;=,')
    if not environ.get('SCRIPT_NAME'):
        url += path_info[1:]
    else:
        url += path_info
    if include_query and environ.get('QUERY_STRING'):
        url += '?' + environ['QUERY_STRING']
    return url

def shift_path_info(environ):
    """Shift a name from PATH_INFO to SCRIPT_NAME, returning it

    If there are no remaining path segments in PATH_INFO, return None.
    Note: 'environ' is modified in-place; use a copy if you need to keep
    the original PATH_INFO or SCRIPT_NAME.

    Note: when PATH_INFO is just a '/', this returns '' and appends a trailing
    '/' to SCRIPT_NAME, even though empty path segments are normally ignored,
    and SCRIPT_NAME doesn't normally end in a '/'.  This is intentional
    behavior, to ensure that an application can tell the difference between
    '/x' and '/x/' when traversing to objects.
    """
    path_info = environ.get('PATH_INFO','')
    if not path_info:
        return None

    path_parts = path_info.split('/')
    path_parts[1:-1] = [p for p in path_parts[1:-1] if p and p != '.']
    name = path_parts[1]
    del path_parts[1]

    script_name = environ.get('SCRIPT_NAME','')
    script_name = posixpath.normpath(script_name+'/'+name)
    if script_name.endswith('/'):
        script_name = script_name[:-1]
    if not name and not script_name.endswith('/'):
        script_name += '/'

    environ['SCRIPT_NAME'] = script_name
    environ['PATH_INFO']   = '/'.join(path_parts)

    # Special case: '/.' on PATH_INFO doesn't get stripped,
    # because we don't strip the last element of PATH_INFO
    # if there's only one path part left.  Instead of fixing this
    # above, we fix it here so that PATH_INFO gets normalized to
    # an empty string in the environ.
    if name=='.':
        name = None
    return name

def setup_testing_defaults(environ):
    """Update 'environ' with trivial defaults for testing purposes

    This adds various parameters required for WSGI, including HTTP_HOST,
    SERVER_NAME, SERVER_PORT, REQUEST_METHOD, SCRIPT_NAME, PATH_INFO,
    and all of the wsgi.* variables.  It only supplies default values,
    and does not re