SftpPoller client class implementation. More...

Public Member Functions
	constructor (Qore::SSH2::SFTPClient n_sftp, hash nconf)
	creates the SftpPoller object from the SFTPClient argument and configuration hash argument passed More...

	constructor (hash nconf)
	creates the SftpPoller object from the configuration hash argument passed More...

	destructor ()
	stops the polling operation if in progress and destroys the object

int	getPollCount ()
	returns the current poll count

int	getStoreFile (string remote_path, string local_path, *timeout n_timeout)
	retrieves a remote file and stores it to a local path More...

string	getTextFile (string path, timeout n_timeout, string n_encoding)
	retrieves a text file and returns the file's contents

binary	getFile (string path, *timeout n_timeout)
	retrieves a binary file and returns the file's contents

	rename (string old, string nnew, *timeout n_timeout)
	renames a file on the server

	removeFile (string fn, *timeout n_timeout)
	deletes a file on the server

*hash	stat (string path, *timeout n_timeout)
	returns information about a remote file (see Qore::SSH2::SFTPClient::stat() for a description of the return format)

	checkRemotePath (string path, bool write=False, *timeout n_timeout)
	check if a remote path is writable More...

list	getFiles (int sort=SftpPoller::SortNone, int order=SftpPoller::OrderAsc)
	returns a list of regular file hashes matching any file name mask set for the object More...

int	start ()
	starts polling in the background; returns the thread ID of the polling thread More...

	stopNoWait ()
	stops the polling operation, returns immediately More...

	stop ()
	stops the polling operation, returns when the polling operation has been stopped More...

	waitStop ()
	waits indefinitely for the polling operation to stop; if polling was not in progress then this method returns immediately More...

	startInline ()
	starts the polling operation inline (not in a background thread) More...

bool	runOnce ()
	runs a single poll (useful for checking for errors inline before starting a background thread)

*bool	fileEvent (list l)
	called for each poll with a list of all files matched before transfer; if this method returns False or nothing, then the singleFileEvent method is not called

abstract	singleFileEvent (hash fih)
	called for each matching file individually whenever matching files are polled with the list of matching file names; if any error occurs here, the error is logged and the polling operation is retried More...

abstract	postSingleFileEvent (hash fih)
	called after singleFileEvent() for each matching file individually whenever matching files are polled with the list of matching file names; if any error occurs here, the polling operation stops More...

Static Public Member Functions
static	checkPath (string path, string type, bool write=False)
	checks a path on the local file system More...

Public Attributes
const	OrderAsc = 0
	ascending sort order

const	OrderDesc = 1
	descending sort order

const	SortNone = 0
	no sorting

const	SortName = 1
	sort by name

const	RequiredKeys
	minimum required keys for all constructors

const	RequiredKeysWithHost = RequiredKeys + "host"
	RequiredKeys for the constructor(hash) without an Qore::SSH2::SFTPClient argument.

const	Defaults
	default values for constructor hash argument

const	OptionalKeys
	optional constructor hash keys

const	AllKeys = RequiredKeysWithHost + Defaults.keys() + OptionalKeys
	all keys

const	ErrorDelay = 1m
	pause when SFTP errors are detected

Private Member Functions
Mutex	m ()
	start mutex

Counter	sc ()
	stop counter

	logInfo (string fmt)
	calls the `"log_info"` closure or call reference with important information

	logDetail (string fmt)
	calls the `"log_detail"` closure or call reference with detail information

	logDebug (string fmt)
	calls the `"log_debug"` closure or call reference with verbose debugging information

	setMask ()
	converts a glob mask into a regex

	sftpSleep (softint secs)
	sleeps for the specificed number of seconds

	run ()
	starts the polling operation

Private Attributes
string	host
	host or address name

int	port
	port

string	user
	user

string	url
	url

*string	pass
	password; one of `"pass"` or `"keyfile"` must be set

*string	keyfile
	path to the ssh private key in PEM format; one of `"pass"` or `"keyfile"` must be set

softlist	path = "."
	path(s) to poll

string	rootSftpPath
	path after connect to SFTP server

*string	mask
	file glob name mask (ignored if `"regex_mask"` also set)

int	poll_interval
	poll interval in seconds

bool	runflag = False
	run flag

bool	get_files
	internal "get files" flag

bool	fatal = False
	internal fatal error flag

int	pollcnt = 0
	internal poll counter

int	tid
	polling tid

timeout	timeout
	timeout in ms

Qore::SSH2::SFTPClient	sftp
	SFTPClient object.

int	reopts = 0
	file matching regex options

*softint	minage
	minimum file age

*string	encoding
	file encoding for text files

*code	log_info
	optional info log closure

*code	log_detail
	optional detail log closure

*code	log_debug
	optional debug log closure

*code	start_thread
	optional start thread closure

*code	sleep
	optional sleep closure

bool	binary
	binary transfer flag (for singleFileEvent())

bool	writable
	chech if path is writable for others in constructor

string	check_file
	name of check writable file

*bool	skip_file_content_retrieval
	whether or not to skip the file content retrieval in runOnce()

Detailed Description

SftpPoller client class implementation.

Member Function Documentation

◆ checkPath()

static SftpPoller::SftpPoller::checkPath	(	string	path,
		string	type,
		bool	write = `False`
	)

static

checks a path on the local file system

Exceptions

DIR-ERROR this exception is thrown if the local path does not exist, is not readable, is not a directory, or should be writable and is not

◆ checkRemotePath()

SftpPoller::SftpPoller::checkRemotePath	(	string	path,
		bool	write = `False`,
		*timeout	n_timeout
	)

check if a remote path is writable

Exceptions

REMOTE-DIR-ERROR this exception is thrown if the remote path does not exist, is not a directory, or is not not writable

◆ constructor() [1/2]

SftpPoller::SftpPoller::constructor	(	Qore::SSH2::SFTPClient	n_sftp,
		hash	nconf
	)

creates the SftpPoller object from the SFTPClient argument and configuration hash argument passed

Parameters

n_sftp the new SFTPClient object

nconf

a hash with the following optional keys:

poll_interval: the integer polling interval in seconds (default: 10 seconds; must be > 0 if given)
mask: the file glob mask to use (default: "*", ignored if "regex_mask" is also present)
path: the remote path(s) for retrieving the files; if a list of strings is given then each path will be polled for matching files according to the "mask" or "regex_mask" option
regex_mask: a regular expression to use as a mask (overrides any "mask" value)
reopts: regular expression match options (ex RE_Caseless for case-insensitive matches)
timeout: connection timeout (default 30s)
minage: the minimum file age in seconds before a file will be acquired (default: 0)
encoding: the encoding for any text files received
binary: if set to True then files are transferred in binary mode by default (with singleFileEvent() usage only), otherwise file data is returned in text format
log_info: a closure or call reference for logging important information; must accept a single string giving the log message
log_detail: a closure or call reference for logging detailed information; must accept a single string giving the log message
log_debug: a closure or call reference for logging verbose debgugging information; must accept a single string giving the log message
start_thread: (required when imported into a context where Qore::PO_NO_THREAD_CONTROL is set) a closure or call reference for starting threads; must return the integer thread ID (if not set then background will be used)
sleep: (required when imported into a context where Qore::PO_NO_PROCESS_CONTROL is set) a closure or call reference to use instead of Qore::sleep() (if not set then Qore::sleep() will be used)
writable: check if path(s) is/are writable (default: False see also the "check_file" option)
check_file: name of a check file. The file will be created and deleted in the path to test if path is writable. If the file alrady exists, it will be deleted. (default: "qore-sftp-check-file")

Exceptions

SFTPPOLLER-CONSTRUCTOR-ERROR	missing required key, invalid port or poll_interval given
SFTPCLIENT-PARAMETER-ERROR	empty hostname passed
SOCKET-CONNECT-ERROR	error establishing socket connection (no listener, port blocked, etc); timeout establishing socket connection
SSH2CLIENT-CONNECT-ERROR	no user name set; ssh2 or libssh2 error
SSH2-ERROR	error initializing or establishing ssh2 session
SSH2CLIENT-AUTH-ERROR	no proper authentication method found
SFTPCLIENT-CONNECT-ERROR	error initializing sftp session or getting remote path

◆ constructor() [2/2]

SftpPoller::SftpPoller::constructor ( hash nconf )

creates the SftpPoller object from the configuration hash argument passed

Parameters

nconf

a hash with the following keys:

host: (required) the hostname or address to connect to
port: the integer port number to connect to (default 22; must be > 0 if given)
user: the username to use for the connection
pass: the password to use for the connection
keyfile: the SSH key (file and path to it)
path: the remote path(s) for retrieving the files
poll_interval: the integer polling interval in seconds (default: 10 seconds; must be > 0 if given)
mask: the file glob mask to use (default: "*", ignored if "regex_mask" is also present)
regex_mask: a regular expression to use as a mask (overrides any "mask" value)
reopts: regular expression match options (ex RE_Caseless for case-insensitive matches)
timeout: connection timeout (default 30s)
minage: the minimum file age in seconds before a file will be acquired (default: 0)
encoding: the encoding for any text files received
log_info: a closure or call reference for logging important information; must accept a single string giving the log message
log_detail: a closure or call reference for logging detailed information; must accept a single string giving the log message
log_debug: a closure or call reference for logging verbose debgugging information; must accept a single string giving the log message
start_thread: (required when imported into a context where Qore::PO_NO_THREAD_CONTROL is set) a closure or call reference for starting threads; must return the integer thread ID (if not set then background will be used)
sleep: (required when imported into a context where Qore::PO_NO_PROCESS_CONTROL is set) a closure or call reference to use instead of Qore::sleep() (if not set then Qore::sleep() will be used)
writable: check if path(s) is/are writable (default: False see also the "check_file" option)
check_file: name of a check file. The file will be created and deleted in the path to test if path is writable. If the file alrady exists, it will be deleted. (default: "qore-sftp-check-file")
skip_file_content_retrieval: if True then SftpPoller::SftpPoller::singleFileEvent and SftpPoller::SftpPoller::postSingleFileEvent methods won't get 'data' member of the input hash, i.e. the file content won't be read by the SftpPoller class, opening a space for child classes to implement their own file retrieval in SftpPoller::SftpPoller::singleFileEvent or SftpPoller::SftpPoller::postSingleFileEvent (default: False); (since ssh2 1.1)

Exceptions

SFTPPOLLER-CONSTRUCTOR-ERROR	missing required key, invalid port or poll_interval given
SFTPCLIENT-PARAMETER-ERROR	empty hostname passed
SOCKET-CONNECT-ERROR	error establishing socket connection (no listener, port blocked, etc); timeout establishing socket connection
SSH2CLIENT-CONNECT-ERROR	no user name set; ssh2 or libssh2 error
SSH2-ERROR	error initializing or establishing ssh2 session
SSH2CLIENT-AUTH-ERROR	no proper authentication method found
SFTPCLIENT-CONNECT-ERROR	error initializing sftp session or getting remote path

◆ getFiles()

list SftpPoller::SftpPoller::getFiles	(	int	sort = `SftpPoller::SortNone`,
		int	order = `SftpPoller::OrderAsc`
	)

returns a list of regular file hashes matching any file name mask set for the object

Parameters

sort	the sort option for the list returned
order	the ordering of sorted data returned

Returns

a list of regular file hashes with the following keys in each list element:

name: the name of the file, link, or directory
size: the size of the file in bytes
uid: the UID of the owner of the file
gid: the GID of the owner of the file
mode: the permissions / mode of the file
atime: the last accessed date/time of the file
mtime: the last modified date/time of the file
type: the type of file is always "REGULAR"
perm: a string giving UNIX-style permissions for the file (ex: "-rwxr-xr-x")

◆ getStoreFile()

int SftpPoller::SftpPoller::getStoreFile	(	string	remote_path,
		string	local_path,
		*timeout	n_timeout
	)

retrieves a remote file and stores it to a local path

Parameters

remote_path	the remote file path
local_path	the local file path
n_timeout	a timeout in milliseconds

Returns: the number of bytes transferred

◆ postSingleFileEvent()

abstract SftpPoller::SftpPoller::postSingleFileEvent ( hash fih )

pure virtual

called after singleFileEvent() for each matching file individually whenever matching files are polled with the list of matching file names; if any error occurs here, the polling operation stops

This method would normally delete / rename / move files processed by singleFileEvent() so that they would not be polled a second time. If an error occurs in this operation, then the polling event will stop since continuing after failing to delete, rename, or move a file already processed would cause the file to be processed more than once.

Parameters

fih

a hash of file data and information with the following keys:

name: the name of the file, link, or directory
size: the size of the file in bytes
uid: the UID of the owner of the file
gid: the GID of the owner of the file
mode: the permissions / mode of the file
atime: the last accessed date/time of the file
mtime: the last modified date/time of the file
type: the type of file; one of: "REGULAR", "DIRECTORY", "SYMBOLIC-LINK", "BLOCK-DEVICE", "CHARACTER-DEVICE", "FIFO", "SYMBOLIC-LINK", "SOCKET", or "UNKNOWN"
perm: a string giving UNIX-style permissions for the file (ex: "-rwxr-xr-x")
data: the file's data; this will be a string unless the "binary" option is set to True, in which case this key is assigned to the files binary data; this hash key is only present if skip_file_content_retrieval was False in the SftpPoller::SftpPoller::constructor options
filepath: the remote filepath relative to SFTP root directory

◆ singleFileEvent()

abstract SftpPoller::SftpPoller::singleFileEvent ( hash fih )

pure virtual

called for each matching file individually whenever matching files are polled with the list of matching file names; if any error occurs here, the error is logged and the polling operation is retried

Parameters

fih

a hash of file data and information with the following keys:

name: the name of the file, link, or directory
size: the size of the file in bytes
uid: the UID of the owner of the file
gid: the GID of the owner of the file
mode: the permissions / mode of the file
atime: the last accessed date/time of the file
mtime: the last modified date/time of the file
type: the type of file; one of: "REGULAR", "DIRECTORY", "SYMBOLIC-LINK", "BLOCK-DEVICE", "CHARACTER-DEVICE", "FIFO", "SYMBOLIC-LINK", "SOCKET", or "UNKNOWN"
perm: a string giving UNIX-style permissions for the file (ex: "-rwxr-xr-x")
data: the file's data; this will be a string unless the "binary" option is set to True, in which case this key is assigned to the files binary data; this hash key is only present if skip_file_content_retrieval was False in the SftpPoller::SftpPoller::constructor options
filepath: the remote filepath relative to SFTP root directory

◆ start()

int SftpPoller::SftpPoller::start ( )

starts polling in the background; returns the thread ID of the polling thread

if polling had already been started, then the thread ID of the polling thread is returned immediately

◆ startInline()

SftpPoller::SftpPoller::startInline ( )

starts the polling operation inline (not in a background thread)

Exceptions

SFTPPOLLER-ERROR this exception is thrown if polling is already in progress

◆ stop()

SftpPoller::SftpPoller::stop ( )

stops the polling operation, returns when the polling operation has been stopped

if polling was not in progress then this method returns immediately

Exceptions

THREAD-ERROR this exception is thrown if this method is called from the event thread since it would result in a deadlock

See also: stopNoWait()

◆ stopNoWait()

SftpPoller::SftpPoller::stopNoWait ( )

stops the polling operation, returns immediately

See also: stop()

◆ waitStop()

SftpPoller::SftpPoller::waitStop ( )

waits indefinitely for the polling operation to stop; if polling was not in progress then this method returns immediately

Exceptions

THREAD-ERROR this exception is thrown if this method is called from the event thread since it would result in a deadlock

Public Member Functions

Static Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Member Function Documentation

◆ checkPath()

◆ checkRemotePath()

◆ constructor() [1/2]

◆ constructor() [2/2]

◆ getFiles()

◆ getStoreFile()

◆ postSingleFileEvent()

◆ singleFileEvent()

◆ start()

◆ startInline()

◆ stop()

◆ stopNoWait()

◆ waitStop()