B ‹æ@\Žã@sbdZddlmZmZmZmZddlZe e¡Z ddl m Z dZ dd„Z dd „Zd d „Zd d „ZdS)zc Provide some utility functions useful for implementing different components in ``bokeh.server``. é)Úabsolute_importÚdivisionÚprint_functionÚunicode_literalsN)Únetutil)Ú bind_socketsÚcheck_whitelistÚcreate_hosts_whitelistÚ match_hostcCs`tj|p d|d}t|ƒst‚dd„|Dƒ}t|ƒdks@tdƒ‚| ¡}|rX||ksXt‚||fS)aô Bind a socket to a port on an address. Args: address (str) : An address to bind a port on, e.g. ``"localhost"`` port (int) : A port number to bind. Pass 0 to have the OS automatically choose a free port. This function returns a 2-tuple with the new socket as the first element, and the port that was bound as the second. (Useful when passing 0 as a port number to bind any free port.) Returns: (socket, port) r)ÚportÚaddresscSsh|]}| ¡d’qS)é)Z getsockname)Ú.0Ús©rú0lib/python3.7/site-packages/bokeh/server/util.pyú Dszbind_sockets..r zMultiple ports assigned??)rrÚlenÚAssertionErrorÚpop)r r ZssZportsZ actual_portrrrr.s  rcs2dˆkrˆd‰ˆ|krdSt‡fdd„|DƒƒS)a¸ Check a given request host against a whitelist. Args: host (str) : A host string to compare against a whitelist. If the host does not specify a port, then ``":80"`` is implicitly assumed. whitelist (seq[str]) : A list of host patterns to match against Returns: ``True``, if ``host`` matches any pattern in ``whitelist``, otherwise ``False`` ú:z:80Tc3s|]}tˆ|ƒVqdS)N)r )rÚpattern)Úhostrrú csz"check_whitelist..)Úany)rZ whitelistr)rrrKs rc Csô|sdt|ƒgSg}xØ|D]Ð}d|kr4t d|¡|dkrH| |¡q| d¡}t|ƒdkr‚|ddkrrtdƒ‚| |d ¡qt|ƒd kràyt|dƒWn tk r¾td |ƒ‚YnX|ddkrÔtdƒ‚| |¡qtd |ƒ‚qW|S) an This whitelist can be used to restrict websocket or other connections to only those explicitly originating from approved hosts. Args: host_list (seq[str]) : A list of string `` or `:` values to add to the whitelist. If no port is specified in a host string, then ``":80"`` is implicitly assumed. port (int) : If ``host_list`` is empty or ``None``, then the whitelist will be the single item list `` [ 'localhost:' ]`` If ``host_list`` is not empty, this parameter has no effect. Returns: list[str] Raises: ValueError, if host or port values are invalid Note: If any host in ``host_list`` contains a wildcard ``*`` a warning will be logged regarding permissive websocket connections. z localhost:Ú*z›Host wildcard %r will allow connections originating from multiple (or possibly all) hostnames or IPs. Use non-wildcard values to restrict access explicitlyrr rÚzEmpty host valuez:80ézInvalid port in host value: %szInvalid host value: %s)ÚstrÚlogZwarningÚappendÚsplitrÚ ValueErrorÚint)Z host_listr ZhostsrÚpartsrrrr es4        r cCs¸d|kr| dd¡\}}nd}d|krD| dd¡\}}|dkrHd}nd}|dk r\||kr\dS| d¡}| d¡}t|ƒt|ƒkr„dSx.t||ƒD] \}}||ks|dkr¬qqdSqWdS)aa Match a host string against a pattern Args: host (str) A hostname to compare to the given pattern pattern (str) A string representing a hostname pattern, possibly including wildcards for ip address octets or ports. This function will return ``True`` if the hostname matches the pattern, including any wildcards. If the pattern contains a port, the host string must also contain a matching port. Returns: bool Examples: >>> match_host('192.168.0.1:80', '192.168.0.1:80') True >>> match_host('192.168.0.1:80', '192.168.0.1') True >>> match_host('192.168.0.1:80', '192.168.0.1:8080') False >>> match_host('192.168.0.1', '192.168.0.2') False >>> match_host('192.168.0.1', '192.168.*.*') True >>> match_host('alice', 'alice') True >>> match_host('alice:80', 'alice') True >>> match_host('alice', 'bob') False >>> match_host('foo.example.com', 'foo.example.com.net') False >>> match_host('alice', '*') True >>> match_host('alice', '*:*') True >>> match_host('alice:80', '*') True >>> match_host('alice:80', '*:80') True >>> match_host('alice:8080', '*:80') False rr NrFÚ.T)Úrsplitr!rÚzip)rrZ host_portZ pattern_portÚhÚprrrr ¤s&2  r )Ú__doc__Z __future__rrrrZloggingZ getLoggerÚ__name__rZtornadorÚ__all__rrr r rrrrÚ s  ?