o "4g @sdZddlmZddlZddlZddlmZddlmZ ddl m Z m Z ddl mZmZmZdd l mZed ZdddZdddZdS)z8 Separate connection attempts from a connection string. ) annotationsN)shuffle)errors)ConnDict ConnMapping) get_param is_ip_address get_param_def)split_attemptspsycopgparamsrreturnlist[ConnDict]c Csd}g}t|D])}z |t|Wqty1}ztd|d||}WYd}~qd}~ww|s?|s8Jtt |t |ddkrJt ||S)aSplit a set of connection params on the single attempts to perform. A connection param can perform more than one attempt more than one ``host`` is provided. Also perform async resolution of the hostname into hostaddr. Because a host can resolve to more than one address, this can lead to yield more attempts too. Raise `OperationalError` if no host could be resolved. Because the libpq async function doesn't honour the timeout, we need to reimplement the repeated attempts. Nzfailed to resolve host %r: %shostload_balance_hostsrandom) r extend_resolve_hostnamesOSErrorloggerdebuggeteOperationalErrorstrrr)r last_excattemptsattemptexr c/var/www/html/authentication-server/venv/lib/python3.10/site-packages/psycopg/_conninfo_attempts.pyconninfo_attemptss   r"rcstd}|r|ds|dddkrgStd}|r!gSt|r.id|igStd}|s@td}|r>|jp?d}tj||tjtjd }fd d |DS) aD Perform async DNS lookup of the hosts and return a list of connection attempts. If a ``host`` param is present but not ``hostname``, resolve the host addresses asynchronously. :param params: The input parameters, for instance as returned by `~psycopg.conninfo.conninfo_to_dict()`. The function expects at most a single entry for host, hostaddr because it is designed to further process the input of split_attempts(). :return: A list of attempts to make (to include the case of a hostname resolving to more than one IP). r/r:hostaddrport5432)prototypecs$g|]}id|ddiqS)r&rr ).0itemr r r! `s$z&_resolve_hostnames..) r startswithr r compiledsocket getaddrinfo IPPROTO_TCP SOCK_STREAM)r rr&r'port_defansr r.r!r:s    r)r rrr)r rrr)__doc__ __future__rr2loggingrrrrabcrr_conninfo_utilsrr r r getLoggerrr"rr r r r!s      !