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fs_watch.py
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fs_watch.py
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#! /usr/bin/env python
import hashlib
import logging
import mimetypes
import os
import time
import datetime
from optparse import OptionParser
from os import stat
import sys
from stat import ST_MODE
from datastore import FileData, Session
from config import Config
from pwd import getpwuid
import grp
from watchdog.observers import Observer
from watchdog.events import LoggingEventHandler
from wd_api import SearchAppApi
logger = logging.getLogger(__name__)
class WalkException(Exception):
pass
class Watcher(LoggingEventHandler):
"""
extend file system event handler:
"""
def __init__(self, *args, **kwargs):
super(Watcher, self).__init__(*args, **kwargs)
self.session = Session()
self.api = SearchAppApi(config.search_key(), config.app_key(), config.base_url(), config.schema())
def fileinfo(self, path):
"""
:param fname: filename
:returns list of
owner
group
file size
md5
mimetype
file permissions
mtime
"""
owner = self._owner(path)
md5 = self._file_hash(path)
mtime = self._mtime(path)
mimetype = self._file_mimetype(path)
filesize = self._filesize(path)
fileperm = self._fileperms(path)
group = self._groupname(path)
return owner, group, filesize, md5, mimetype, fileperm, mtime
def on_created(self, event):
"""Called when a file or directory is created.
:param event:
Event representing file/directory creation.
:type event:
:class:`DirCreatedEvent` or :class:`FileCreatedEvent`
"""
super(Watcher, self).on_created(event)
# if directory is created, walk will take care of it
if event.is_directory:
pass
else:
try:
# this may be a temporary file created by an app
(owner, group, filesize, md5, mimetype, fileperm, mtime) = self.fileinfo(event.src_path)
except OSError as e:
logger.error(u"No such file: {0}: {1}".format(event.src_path, e))
else:
# if there are file stats, deal with it
if mimetype:
file_obj = FileData(
name=event.src_path,
md5_hash=md5,
owner=owner,
group=group,
filesize=filesize,
permissions=fileperm,
mtime=mtime
)
self.session.add(file_obj)
self.session.commit()
self.api.do_post(event.src_path, mimetype, owner, mtime, fileperm, filesize)
print(u"Created: {0}, {1}, {2}, {3}, {4}, {5}".format(
event.src_path,
owner,
filesize,
md5,
mimetype,
fileperm)
)
def on_deleted(self, event):
"""
We ignore deletes (for now)
just log
"""
super(Watcher, self).on_deleted(event)
def on_modified(self, event):
"""Called when a file or directory is modified.
:param event:
Event representing file/directory modification.
:type event:
:class:`DirModifiedEvent` or :class:`FileModifiedEvent`
"""
super(Watcher, self).on_modified(event)
if event.is_directory:
pass
else:
(owner, group, filesize, md5, mimetype, fileperm, mtime) = self.fileinfo(event.src_path)
file_data = self.session.query(FileData).filter(FileData.name==event.src_path, FileData.md5_hash!=md5)
if file_data.count() > 0:
session.query(FileData).update(
{
FileData.md5_hash: md5,
FileData.filesize: filesize,
FileData.owner: owner,
FileData.group: group,
FileData.mtime: mtime,
FileData.permissions: fileperm
})
self.session.commit()
self.api.do_post(event.src_path, mimetype, owner, mtime, fileperm, filesize)
def _file_mimetype(self, fname):
"""
:param full path to file
:return mime type (if known) of the file
"""
try:
suffix = os.path.splitext(os.path.split(fname)[-1])[1]
except IndexError as e:
logger.error("{0} has no file extension".format(fname))
return None
else:
mimetypes.init()
return mimetypes.types_map.get(suffix) or None
def _file_hash(self, fname):
"""
:param full pathname of file:
:return: md5 hexdigest of fname
"""
return hashlib.md5(fname).hexdigest()
def _owner(self, fname):
"""
:param fname: full path to file
:return: owner of file
"""
return getpwuid(stat(fname).st_uid).pw_name
def _fileperms(self, fname):
"""
:param full pathname of file:
:return: octal repr of file perms
"""
return oct(os.stat(fname)[ST_MODE] & 0777)
def _filesize(self, fname):
"""
:param fname:
:return: file size in byes
"""
return os.stat(fname).st_size
def _mtime(self, fname):
"""
:param fname:
:return: mod time as dateime obj
"""
return datetime.datetime.fromtimestamp(os.stat(fname).st_mtime)
def _groupname(self, fname):
"""
:param fname:
:return: get the group name of fname
FIXME: groups in Windoze??
"""
if sys.platform == 'win32':
return None
else:
return grp.getgrgid(os.stat(fname).st_gid).gr_name
if __name__ == "__main__":
parser = OptionParser()
parser.add_option('-d', '--init-dir',
help="top director to watch",
action="store",
type="string",
dest='dir')
parser.add_option('-c', '--conf-file',
action="store",
type="string",
help='location of conf file (if not .)',
dest='conf')
(options, args) = parser.parse_args()
conf_file = './fswatch.conf'
if options.conf:
conf_file = options.conf
logging.basicConfig(level=logging.INFO,
format='%(asctime)s - %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
config = Config(conf_file)
watch_dir = ''
if config.watch_dir() is not None:
watch_dir = config.watch_dir()
session = Session()
event_handler = Watcher()
api = SearchAppApi(config.search_key(), config.app_key(), config.base_url(), config.schema())
if options.dir:
watch_dir = options.dir
def manage_walkexception():
pass
if watch_dir == '' or watch_dir is None:
raise WalkException("Set a directory to watch either from command line for config file")
for root, dirs, files in os.walk(watch_dir, topdown=True, onerror=manage_walkexception(),followlinks=False):
for fname in files:
(owner, group, filesize, md5, mimetype, fileperm, mtime) = event_handler.fileinfo(os.path.join(root, fname))
if mimetype in config.mimetypes.values():
fd = FileData(
name=os.path.join(root, fname),
md5_hash=md5,
owner=owner,
group=group,
filesize=filesize,
permissions=fileperm,
mtime=mtime
)
# not seen tis file before
if session.query(FileData).filter(FileData.name==fd.name, fd.md5_hash==md5).count() == 0:
session.add(fd)
session.commit()
api.do_post(os.path.join(root, fname), mimetype, owner, mtime, fileperm, filesize)
else:
# log it
logger.info("File: {fname} in {path}, was already posted to {schema}".format(
fname=fname, path=root, schema=config.schema()
))
observer = Observer()
try:
observer.schedule(event_handler, watch_dir, recursive=True)
observer.start()
except IOError as e:
logger.error("Caught IOError: {}".format(e))
# print("caught IOError: {}".format(e))
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()