wsgi.py 文件源码

def get_query_string(environ):
    """Returns the `QUERY_STRING` from the WSGI environment.  This also takes
    care about the WSGI decoding dance on Python 3 environments as a
    native string.  The string returned will be restricted to ASCII
    characters.

    .. versionadded:: 0.9

    :param environ: the WSGI environment object to get the query string from.
    """
    qs = wsgi_get_bytes(environ.get('QUERY_STRING', ''))
    # QUERY_STRING really should be ascii safe but some browsers
    # will send us some unicode stuff (I am looking at you IE).
    # In that case we want to urllib quote it badly.
    return try_coerce_native(url_quote(qs, safe=':&%=+$!*\'(),'))