U vù¾fã@sHdZddlZddlmZmZddlmZGdd„deƒZddlm Z dS)z7 Abstraction of an SFTP file handle (for server mode). éN)ÚSFTP_OP_UNSUPPORTEDÚSFTP_OK)ÚClosingContextManagerc@sbeZdZdZddd„Zdd„Zdd„Zd d „Zdd„Zd d„Z dd„Z dd„Zdd„Zdd„Z dS)Ú SFTPHandlea– Abstract object representing a handle to an open file (or folder) in an SFTP server implementation. Each handle has a string representation used by the client to refer to the underlying file. Server implementations can (and should) subclass SFTPHandle to implement features of a file handle, like `stat` or `chattr`. Instances of this class may be used as context managers. rcCs||_d|_i|_d|_dS)a" Create a new file handle representing a local file being served over SFTP. If ``flags`` is passed in, it's used to determine if the file is open in append mode. :param int flags: optional flags as passed to `.SFTPServerInterface.open` N)Ú_SFTPHandle__flagsÚ_SFTPHandle__nameÚ_SFTPHandle__filesÚ_SFTPHandle__tell)ÚselfÚflags©rúE/opt/alt/python38/lib/python3.8/site-packages/paramiko/sftp_handle.pyÚ__init__(s zSFTPHandle.__init__cCs<t|ddƒ}|dk r| ¡t|ddƒ}|dk r8| ¡dS)a When a client closes a file, this method is called on the handle. Normally you would use this method to close the underlying OS level file object(s). The default implementation checks for attributes on ``self`` named ``readfile`` and/or ``writefile``, and if either or both are present, their ``close()`` methods are called. This means that if you are using the default implementations of `read` and `write`, this method's default implementation should be fine also. ÚreadfileNÚ writefile)ÚgetattrÚclose)r rrrrr r7szSFTPHandle.closec Cs¤t|ddƒ}|dkrtSz<|jdkr.| ¡|_||jkrH| |¡||_| |¡}Wn8tk rŒ}zd|_t |j ¡WY¢Sd}~XYnX|jt |ƒ7_|S)a5 Read up to ``length`` bytes from this file, starting at position ``offset``. The offset may be a Python long, since SFTP allows it to be 64 bits. If the end of the file has been reached, this method may return an empty string to signify EOF, or it may also return ``SFTP_EOF``. The default implementation checks for an attribute on ``self`` named ``readfile``, and if present, performs the read operation on the Python file-like object found there. (This is meant as a time saver for the common case where you are wrapping a Python file object.) :param offset: position in the file to start reading from. :param int length: number of bytes to attempt to read. :return: the `bytes` read, or an error code `int`. rN)rrr ÚtellÚseekÚreadÚIOErrorÚ SFTPServerÚ convert_errnoÚerrnoÚlen)r ÚoffsetÚlengthrÚdataÚerrr rJs "zSFTPHandle.readc CsÆt|ddƒ}|dkrtSzT|jtj@dkrX|jdkr>| ¡|_||jkrX| |¡||_| |¡| ¡Wn8t k r¤}zd|_t |j ¡WY¢Sd}~XYnX|jdk rÂ|jt|ƒ7_tS)am Write ``data`` into this file at position ``offset``. Extending the file past its original end is expected. Unlike Python's normal ``write()`` methods, this method cannot do a partial write: it must write all of ``data`` or else return an error. The default implementation checks for an attribute on ``self`` named ``writefile``, and if present, performs the write operation on the Python file-like object found there. The attribute is named differently from ``readfile`` to make it easy to implement read-only (or write-only) files, but if both attributes are present, they should refer to the same file. :param offset: position in the file to start reading from. :param bytes data: data to write into the file. :return: an SFTP error code like ``SFTP_OK``. rNr)rrrÚosÚO_APPENDr rrÚwriteÚflushrrrrrr)r rrrrrrr r!ls$ " zSFTPHandle.writecCstS)a™ Return an `.SFTPAttributes` object referring to this open file, or an error code. This is equivalent to `.SFTPServerInterface.stat`, except it's called on an open file instead of a path. :return: an attributes object for the given file, or an SFTP error code (like ``SFTP_PERMISSION_DENIED``). :rtype: `.SFTPAttributes` or error code ©r©r rrr Ústat’szSFTPHandle.statcCstS)af Change the attributes of this file. The ``attr`` object will contain only those fields provided by the client in its request, so you should check for the presence of fields before using them. :param .SFTPAttributes attr: the attributes to change on this file. :return: an `int` error code like ``SFTP_OK``. r#)r Úattrrrr ÚchattrŸs zSFTPHandle.chattrcCs ||_dS)zÀ Used by the SFTP server code to cache a directory listing. (In the SFTP protocol, listing a directory is a multi-stage process requiring a temporary handle.) N©r)r Úfilesrrr Ú _set_files¬szSFTPHandle._set_filescCs"|jdd…}|jdd…|_|S)z^ Used by the SFTP server code to retrieve a cached directory listing. Nér()r Zfnlistrrr Ú_get_next_files´szSFTPHandle._get_next_filescCs|jS©N©rr$rrr Ú _get_name½szSFTPHandle._get_namecCs ||_dSr-r.)r Únamerrr Ú _set_nameÀszSFTPHandle._set_nameN)r)Ú__name__Ú __module__Ú__qualname__Ú__doc__rrrr!r%r'r*r,r/r1rrrr rs "& r)r) r5rZ paramiko.sftprrZ paramiko.utilrrZparamiko.sftp_serverrrrrr Ús)