wgAddlZddlZddlZddlZddlZddlZddlmZddlm Z ddl Z ddl m Z m Z ddlmZmZej"dZGdd e ZGd d e Zy) N)suppress)quote)AbstractBufferedFileAbstractFileSystem)infer_storage_optionstokenizewebhdfscBeZdZdZeej ZdZ dfd Z e dZ dZ ddZ ddZedZed Zed Zd Zd d Zd ZdZdZd!dZdZdZdZd"dZdZdZd dZ dZ!d dZ"dZ#dZ$dZ%xZ&S)#WebHDFSa Interface to HDFS over HTTP using the WebHDFS API. Supports also HttpFS gateways. Four auth mechanisms are supported: insecure: no auth is done, and the user is assumed to be whoever they say they are (parameter ``user``), or a predefined value such as "dr.who" if not given spnego: when kerberos authentication is enabled, auth is negotiated by requests_kerberos https://github.com/requests/requests-kerberos . This establishes a session based on existing kinit login and/or specified principal/password; parameters are passed with ``kerb_kwargs`` token: uses an existing Hadoop delegation token from another secured service. Indeed, this client can also generate such tokens when not insecure. Note that tokens expire, but can be renewed (by a previously specified user) and may allow for proxying. basic-auth: used when both parameter ``user`` and parameter ``password`` are provided. )r webHDFSc  |jryt|di| | rdndd|d|d|_||_|xsi|_i|_| xsi|_||| td||j d<||_ ||_ | |td |||j d <|||j d <|r | td | |_ | |_ |jd t|||_y)a Parameters ---------- host: str Name-node address port: int Port for webHDFS kerberos: bool Whether to authenticate with kerberos for this connection token: str or None If given, use this token on every call to authenticate. A user and user-proxy may be encoded in the token and should not be also given user: str or None If given, assert the user name to connect with password: str or None If given, assert the password to use for basic auth. If password is provided, user must be provided also proxy_to: str or None If given, the user has the authority to proxy, and this value is the user in who's name actions are taken kerb_kwargs: dict Any extra arguments for HTTPKerberosAuth, see ``_ data_proxy: dict, callable or None If given, map data-node addresses. This can be necessary if the HDFS cluster is behind a proxy, running on Docker or otherwise has a mismatch between the host-names given by the name-node and the address by which to refer to them from the client. If a dict, maps host names ``host->data_proxy[host]``; if a callable, full URLs are passed, and function must conform to ``url->data_proxy(url)``. use_https: bool Whether to connect to the Name-node using HTTPS instead of HTTP session_cert: str or Tuple[str, str] or None Path to a certificate file, or tuple of (cert, key) files to use for the requests.Session session_verify: str, bool or None Path to a certificate file to use for verifying the requests.Session. kwargs Nhttpshttpz://:z /webhdfs/v1z_If passing a delegation token, must not set user or proxy_to, as these are encoded in the token delegationzQIf passing a password, the user must also beset in order to set up the basic-authz user.namedoaszJIf using Kerberos auth, do not specify the user, this is handled by kinit.webhdfs_)_cachedsuper__init__urlkerb kerb_kwargsparsproxy ValueErroruserpassword session_certsession_verify_connectr _fsid)selfhostportkerberostokenrr proxy_tor data_proxy use_httpsr!r"kwargs __class__s c/home/mcse/projects/flask/flask-venv/lib/python3.12/site-packages/fsspec/implementations/webhdfs.pyrzWebHDFS.__init__-s9r <<  "6"!*g7s4&${S &," %2  8#7  ',DIIl #    | < )- +&   (DIIf  (2  ), t 456 c|jSN)r$r%s r/fsidz WebHDFS.fsids zzr0ctj|_|jr|j|j_|j |j_|jr'ddlm }|di|j|j_ |j@|j3ddlm}||j|j|j_ yyy)Nr)HTTPKerberosAuth) HTTPBasicAuthr)requestsSessionsessionr!certr"verifyrrequests_kerberosr6rauthrr requests.authr7)r%r6r7s r/r#zWebHDFS._connects'')    $ 1 1DLL "11  99 : 0 D43C3C DDLL  99 T]]%> 3 -dii GDLL &? r0c ||j|nd}|j|jt|dz}|j }|j |j |j|d<tjd|||jj|j||||} | jdvrY | j} | dd } | dd } | d vr t| | d vr t| | d vr t!| t#| | j'| S#tt$f$rY#wxYw)Nz/=)safeopzsending %s with %s)methodrparamsdataallow_redirects)iiiiiRemoteExceptionmessage exception)IllegalArgumentExceptionUnsupportedOperationException)SecurityExceptionAccessControlException)FileNotFoundException)_strip_protocol _apply_proxyrrcopyupdaterupperloggerdebugr:request status_codejsonrPermissionErrorFileNotFoundError RuntimeErrorKeyErrorraise_for_status) r%rCrDpathrFredirectr-rargsouterrmsgexps r/_callz WebHDFS._callsS-1-=t##D)25D+A AB{{} DIIXXZT  )37ll""<<>$ #  ??7 7 ,hhj+,Y7+,[9WW$S/)KK)#..55+C00&s++  )  s D;;E  E c \|xs |j}t|||||j|||S)a^ Parameters ---------- path: str File location mode: str 'rb', 'wb', etc. block_size: int Client buffer size for read-ahead or write buffer autocommit: bool If False, writes to temporary file that only gets put in final location upon commit replication: int Number of copies of file on the cluster, write mode only permissions: str or int posix permissions, write mode only kwargs Returns ------- WebHDFile instance )mode block_sizetempdir autocommit replication permissions) blocksize WebHDFilerj)r%r_rhrirkrlrmr-s r/_openz WebHDFS._opens<B 14>>   !LL!##  r0cB|dj|d<|d|d<|S)Ntypelengthsize)lower)infos r/ _process_infozWebHDFS._process_infos*F|))+V H~V  r0ct|dS)Nr_)r)clsr_s r/rPzWebHDFS._strip_protocols$T*622r0ct|}|jdd|jddd|vr|jd|d<|S)Nr_protocolusernamer)rpop)urlpathrbs r/_get_kwargs_from_urlszWebHDFS._get_kwargs_from_urlssG#G,   D!  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Returns new expiry timeRENEWDELEGATIONTOKENputrDr)longr)r%r)rbs r/renew_delegation_tokenzWebHDFS.renew_delegation_tokenAs(jj/UjKxxz&!!r0c,|jdd|y)z Stop the token from being usefulCANCELDELEGATIONTOKENrrNrf)r%r)s r/cancel_delegation_tokenzWebHDFS.cancel_delegation_tokenFs *5 Fr0c.|jdd||y)aSet the permission at path Parameters ---------- path: str location to set (file or directory) mod: str or int posix epresentation or permission, give as oct string, e.g, '777' or 0o777 SETPERMISSIONr)rDr_ permissionNr)r%r_mods r/chmodz WebHDFS.chmodJs ?5t Lr0cNi}|||d<|||d<|jdd|d|y)zChange owning user and/or groupNownergrouprrDr_)SETOWNERr)r%r_rrr-s r/chownz WebHDFS.chownWs=  #F7O  #F7O Ae$A&Ar0c.|jd|d|y)a9 Set file replication factor Parameters ---------- path: str File location (not for directories) replication: int Number of copies of file on the cluster. Should be smaller than number of data nodes; normally 3 on most systems. 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