def downgrade_wsgi_ux_to_1x(environ):
"""
Return a new environ dict for WSGI 1.x from the given WSGI u.x
environ.
"""
env1x = {}
url_encoding = environ[native_to_unicode('wsgi.url_encoding')]
for k, v in list(environ.items()):
if k in [native_to_unicode('PATH_INFO'),
native_to_unicode('SCRIPT_NAME'),
native_to_unicode('QUERY_STRING')]:
v = v.encode(url_encoding)
elif isinstance(v, unicodestr):
v = v.encode('ISO-8859-1')
env1x[k.encode('ISO-8859-1')] = v
return env1x
