commit -- why not
This commit is contained in:
Guido van Rossum
parent
21bc15b73d
commit
07a272d9de
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"""File System Proxy.
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Provide an OS-neutral view on a file system, locally or remotely.
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The functionality is geared towards implementing some sort of
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rdist-like utility between a Mac and a UNIX system.
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The module defines three classes:
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FSProxyLocal -- used for local access
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FSProxyServer -- used on the server side of remote access
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FSProxyClient -- used on the client side of remote access
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The remote classes are instantiated with an IP address and an optional
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verbosity flag.
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"""
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import server
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import client
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import md5
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import os
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import fnmatch
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from stat import *
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import time
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import fnmatch
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if os.name == 'mac':
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import macfs
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maxnamelen = 31
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else:
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macfs = None
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maxnamelen = 255
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skipnames = (os.curdir, os.pardir)
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class FSProxyLocal:
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def __init__(self):
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self._dirstack = []
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self._ignore = ['*.pyc'] + self._readignore()
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def _close(self):
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while self._dirstack:
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self.back()
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def _readignore(self):
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file = self._hide('ignore')
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try:
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f = open(file)
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except IOError:
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file = self._hide('synctree.ignorefiles')
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try:
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f = open(file)
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except IOError:
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return []
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ignore = []
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while 1:
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line = f.readline()
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if not line: break
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if line[-1] == '\n': line = line[:-1]
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ignore.append(line)
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f.close()
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return ignore
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def _hidden(self, name):
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if os.name == 'mac':
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return name[0] == '(' and name[-1] == ')'
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else:
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return name[0] == '.'
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def _hide(self, name):
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if os.name == 'mac':
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return '(%s)' % name
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else:
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return '.%s' % name
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def visible(self, name):
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if len(name) > maxnamelen: return 0
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if name[-1] == '~': return 0
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if name in skipnames: return 0
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if self._hidden(name): return 0
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head, tail = os.path.split(name)
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if head or not tail: return 0
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if macfs:
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if os.path.exists(name) and not os.path.isdir(name):
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try:
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fs = macfs.FSSpec(name)
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c, t = fs.GetCreatorType()
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if t != 'TEXT': return 0
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except macfs.error, msg:
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print "***", name, msg
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return 0
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else:
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if os.path.islink(name): return 0
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if '\0' in open(name, 'rb').read(512): return 0
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for ign in self._ignore:
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if fnmatch.fnmatch(name, ign): return 0
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return 1
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def check(self, name):
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if not self.visible(name):
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raise os.error, "protected name %s" % repr(name)
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def checkfile(self, name):
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self.check(name)
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if not os.path.isfile(name):
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raise os.error, "not a plain file %s" % repr(name)
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def pwd(self):
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return os.getcwd()
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def cd(self, name):
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self.check(name)
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save = os.getcwd(), self._ignore
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os.chdir(name)
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self._dirstack.append(save)
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self._ignore = self._ignore + self._readignore()
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def back(self):
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if not self._dirstack:
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raise os.error, "empty directory stack"
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dir, ignore = self._dirstack[-1]
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os.chdir(dir)
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del self._dirstack[-1]
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self._ignore = ignore
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def _filter(self, files, pat = None):
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if pat:
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def keep(name, pat = pat):
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return fnmatch.fnmatch(name, pat)
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files = filter(keep, files)
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files = filter(self.visible, files)
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files.sort()
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return files
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def list(self, pat = None):
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files = os.listdir(os.curdir)
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return self._filter(files, pat)
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def listfiles(self, pat = None):
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files = os.listdir(os.curdir)
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files = filter(os.path.isfile, files)
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return self._filter(files, pat)
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def listsubdirs(self, pat = None):
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files = os.listdir(os.curdir)
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files = filter(os.path.isdir, files)
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return self._filter(files, pat)
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def exists(self, name):
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return self.visible(name) and os.path.exists(name)
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def isdir(self, name):
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return self.visible(name) and os.path.isdir(name)
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def islink(self, name):
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return self.visible(name) and os.path.islink(name)
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def isfile(self, name):
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return self.visible(name) and os.path.isfile(name)
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def sum(self, name):
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self.checkfile(name)
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BUFFERSIZE = 1024*8
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f = open(name)
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sum = md5.new()
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while 1:
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buffer = f.read(BUFFERSIZE)
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if not buffer:
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break
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sum.update(buffer)
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return sum.digest()
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def size(self, name):
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self.checkfile(name)
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return os.stat(name)[ST_SIZE]
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def mtime(self, name):
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self.checkfile(name)
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return time.localtime(os.stat(name)[ST_MTIME])
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def stat(self, name):
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self.checkfile(name)
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size = os.stat(name)[ST_SIZE]
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mtime = time.localtime(os.stat(name)[ST_MTIME])
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return size, mtime
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def info(self, name):
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sum = self.sum(name)
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size = os.stat(name)[ST_SIZE]
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mtime = time.localtime(os.stat(name)[ST_MTIME])
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return sum, size, mtime
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def _list(self, function, list):
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if list is None:
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list = self.listfiles()
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res = []
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for name in list:
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try:
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res.append((name, function(name)))
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except (os.error, IOError):
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res.append((name, None))
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return res
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def sumlist(self, list = None):
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return self._list(self.sum, list)
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def statlist(self, list = None):
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return self._list(self.stat, list)
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def mtimelist(self, list = None):
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return self._list(self.mtime, list)
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def sizelist(self, list = None):
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return self._list(self.size, list)
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def infolist(self, list = None):
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return self._list(self.info, list)
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def _dict(self, function, list):
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if list is None:
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list = self.listfiles()
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dict = {}
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for name in list:
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try:
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dict[name] = function(name)
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except (os.error, IOError):
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pass
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return dict
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def sumdict(self, list = None):
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return self.dict(self.sum, list)
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def sizedict(self, list = None):
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return self.dict(self.size, list)
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def mtimedict(self, list = None):
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return self.dict(self.mtime, list)
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def statdict(self, list = None):
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return self.dict(self.stat, list)
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def infodict(self, list = None):
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return self._dict(self.info, list)
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def read(self, name, offset = 0, length = -1):
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self.checkfile(name)
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f = open(name)
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f.seek(offset)
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if length == 0:
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data = ''
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elif length < 0:
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data = f.read()
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else:
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data = f.read(length)
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f.close()
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return data
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def create(self, name):
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self.check(name)
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if os.path.exists(name):
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self.checkfile(name)
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bname = name + '~'
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try:
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os.unlink(bname)
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except os.error:
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pass
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os.rename(name, bname)
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f = open(name, 'w')
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f.close()
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def write(self, name, data, offset = 0):
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self.checkfile(name)
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f = open(name, 'r+')
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f.seek(offset)
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f.write(data)
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f.close()
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def mkdir(self, name):
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self.check(name)
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os.mkdir(name, 0777)
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def rmdir(self, name):
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self.check(name)
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os.rmdir(name)
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class FSProxyServer(FSProxyLocal, server.Server):
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def __init__(self, address, verbose = server.VERBOSE):
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FSProxyLocal.__init__(self)
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server.Server.__init__(self, address, verbose)
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def _close(self):
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server.Server._close(self)
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FSProxyLocal._close(self)
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def _serve(self):
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server.Server._serve(self)
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# Retreat into start directory
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while self._dirstack: self.back()
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class FSProxyClient(client.Client):
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def __init__(self, address, verbose = client.VERBOSE):
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client.Client.__init__(self, address, verbose)
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def test():
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import string
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import sys
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if sys.argv[1:]:
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port = string.atoi(sys.argv[1])
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else:
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port = 4127
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proxy = FSProxyServer(('', port))
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proxy._serverloop()
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if __name__ == '__main__':
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test()
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"""RPC Client module."""
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import sys
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import socket
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import pickle
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import __builtin__
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import os
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# Default verbosity (0 = silent, 1 = print connections, 2 = print requests too)
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VERBOSE = 1
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class Client:
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"""RPC Client class. No need to derive a class -- it's fully generic."""
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def __init__(self, address, verbose = VERBOSE):
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if type(address) == type(0):
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address = ('', address)
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self._address = address
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self._verbose = verbose
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if self._verbose: print "Connecting to %s ..." % repr(address)
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self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self._socket.connect(address)
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if self._verbose: print "Connected."
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self._lastid = 0 # Last id for which a reply has been received
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self._nextid = 1 # Id of next request
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self._replies = {} # Unprocessed replies
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self._rf = self._socket.makefile('r')
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self._wf = self._socket.makefile('w')
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self._methods = self._call('.methods')
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def __del__(self):
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self._close()
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def _close(self):
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if self._rf: self._rf.close()
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self._rf = None
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if self._wf: self._wf.close()
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self._wf = None
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if self._socket: self._socket.close()
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self._socket = None
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def __getattr__(self, name):
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if name in self._methods:
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method = _stub(self, name)
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setattr(self, name, method) # XXX circular reference
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return method
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raise AttributeError, name
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def _setverbose(self, verbose):
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self._verbose = verbose
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def _call(self, name, *args):
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return self._vcall(name, args)
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def _vcall(self, name, args):
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return self._recv(self._vsend(name, args))
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def _send(self, name, *args):
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return self._vsend(name, args)
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def _send_noreply(self, name, *args):
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return self._vsend(name, args, 0)
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def _vsend_noreply(self, name, args):
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return self._vsend(name, args, 0)
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def _vsend(self, name, args, wantreply = 1):
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id = self._nextid
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self._nextid = id+1
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if not wantreply: id = -id
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request = (name, args, id)
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if self._verbose > 1: print "sending request: %s" % repr(request)
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wp = pickle.Pickler(self._wf)
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wp.dump(request)
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return id
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def _recv(self, id):
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exception, value, rid = self._vrecv(id)
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if rid != id:
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raise RuntimeError, "request/reply id mismatch: %d/%d" % (id, rid)
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if exception is None:
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return value
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x = exception
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if hasattr(__builtin__, exception):
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x = getattr(__builtin__, exception)
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elif exception in ('posix.error', 'mac.error'):
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x = os.error
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if x == exception:
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exception = x
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raise exception, value
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def _vrecv(self, id):
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self._flush()
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if self._replies.has_key(id):
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if self._verbose > 1: print "retrieving previous reply, id = %d" % id
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reply = self._replies[id]
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del self._replies[id]
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return reply
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aid = abs(id)
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while 1:
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if self._verbose > 1: print "waiting for reply, id = %d" % id
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rp = pickle.Unpickler(self._rf)
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reply = rp.load()
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del rp
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if self._verbose > 1: print "got reply: %s" % repr(reply)
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rid = reply[2]
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arid = abs(rid)
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if arid == aid:
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if self._verbose > 1: print "got it"
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return reply
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self._replies[rid] = reply
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if arid > aid:
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if self._verbose > 1: print "got higher id, assume all ok"
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return (None, None, id)
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def _flush(self):
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self._wf.flush()
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class _stub:
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"""Helper class for Client -- each instance serves as a method of the client."""
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def __init__(self, client, name):
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self._client = client
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self._name = name
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def __call__(self, *args):
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return self._client._vcall(self._name, args)
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@ -0,0 +1,185 @@
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"""Compare local and remote dictionaries and transfer differing files -- like rdist."""
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import sys
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from repr import repr
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import FSProxy
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import time
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import os
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def main():
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pwd = os.getcwd()
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s = raw_input("chdir [%s] " % pwd)
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if s:
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os.chdir(s)
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pwd = os.getcwd()
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host = ask("host", 'voorn.cwi.nl')
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port = 4127
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verbose = 1
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mode = ''
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print """\
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Mode should be a string of characters, indicating what to do with differences.
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r - read different files to local file system
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w - write different files to remote file system
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c - create new files, either remote or local
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d - delete disappearing files, either remote or local
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"""
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s = raw_input("mode [%s] " % mode)
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if s: mode = s
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address = (host, port)
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t1 = time.time()
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local = FSProxy.FSProxyLocal()
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remote = FSProxy.FSProxyClient(address, verbose)
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compare(local, remote, mode)
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remote._close()
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local._close()
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t2 = time.time()
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dt = t2-t1
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mins, secs = divmod(dt, 60)
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print mins, "minutes and", secs, "seconds"
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raw_input("[Return to exit] ")
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def ask(prompt, default):
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s = raw_input("%s [%s] " % (prompt, default))
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return s or default
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|
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def askint(prompt, default):
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s = raw_input("%s [%s] " % (prompt, str(default)))
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if s: return string.atoi(s)
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return default
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def compare(local, remote, mode):
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print
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print "PWD =", `os.getcwd()`
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sums_id = remote._send('sumlist')
|
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subdirs_id = remote._send('listsubdirs')
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remote._flush()
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print "calculating local sums ..."
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lsumdict = {}
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for name, info in local.sumlist():
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lsumdict[name] = info
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print "getting remote sums ..."
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sums = remote._recv(sums_id)
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print "got", len(sums)
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rsumdict = {}
|
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for name, rsum in sums:
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rsumdict[name] = rsum
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||||
if not lsumdict.has_key(name):
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print `name`, "only remote"
|
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if 'r' in mode and 'c' in mode:
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recvfile(local, remote, name)
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||||
else:
|
||||
lsum = lsumdict[name]
|
||||
if lsum != rsum:
|
||||
print `name`,
|
||||
rmtime = remote.mtime(name)
|
||||
lmtime = local.mtime(name)
|
||||
if rmtime > lmtime:
|
||||
print "remote newer",
|
||||
if 'r' in mode:
|
||||
recvfile(local, remote, name)
|
||||
elif lmtime > rmtime:
|
||||
print "local newer",
|
||||
if 'w' in mode:
|
||||
sendfile(local, remote, name)
|
||||
else:
|
||||
print "same mtime but different sum?!?!",
|
||||
print
|
||||
for name in lsumdict.keys():
|
||||
if not rsumdict.keys():
|
||||
print `name`, "only locally",
|
||||
fl()
|
||||
if 'w' in mode and 'c' in mode:
|
||||
sendfile(local, remote, name)
|
||||
elif 'r' in mode and 'd' in mode:
|
||||
os.unlink(name)
|
||||
print "removed."
|
||||
print
|
||||
print "gettin subdirs ..."
|
||||
subdirs = remote._recv(subdirs_id)
|
||||
common = []
|
||||
for name in subdirs:
|
||||
if local.isdir(name):
|
||||
print "Common subdirectory", repr(name)
|
||||
common.append(name)
|
||||
else:
|
||||
print "Remote subdirectory", repr(name), "not found locally"
|
||||
lsubdirs = local.listsubdirs()
|
||||
for name in lsubdirs:
|
||||
if name not in subdirs:
|
||||
print "Local subdirectory", repr(name), "not found remotely"
|
||||
for name in common:
|
||||
print "Entering subdirectory", repr(name)
|
||||
local.cd(name)
|
||||
remote.cd(name)
|
||||
compare(local, remote, mode)
|
||||
remote.back()
|
||||
local.back()
|
||||
|
||||
def sendfile(local, remote, name):
|
||||
try:
|
||||
remote.create(name)
|
||||
except (IOError, os.error), msg:
|
||||
print "cannot create:", msg
|
||||
return
|
||||
|
||||
print "sending ...",
|
||||
fl()
|
||||
|
||||
data = open(name).read()
|
||||
|
||||
t1 = time.time()
|
||||
|
||||
remote._send_noreply('write', name, data)
|
||||
remote._flush()
|
||||
|
||||
t2 = time.time()
|
||||
|
||||
dt = t2-t1
|
||||
print len(data), "bytes in", t2-t1, "seconds",
|
||||
if dt:
|
||||
print "i.e.", len(data)/dt, "bytes/sec",
|
||||
print
|
||||
|
||||
def recvfile(local, remote, name):
|
||||
try:
|
||||
local.create(name)
|
||||
except (IOError, os.error), msg:
|
||||
print "cannot create:", msg
|
||||
return
|
||||
|
||||
print "receiving ...",
|
||||
fl()
|
||||
|
||||
f = open(name, 'w')
|
||||
t1 = time.time()
|
||||
|
||||
length = 4*1024
|
||||
offset = 0
|
||||
id = remote._send('read', name, offset, length)
|
||||
remote._flush()
|
||||
while 1:
|
||||
newoffset = offset + length
|
||||
newid = remote._send('read', name, newoffset, length)
|
||||
data = remote._recv(id)
|
||||
id = newid
|
||||
if not data: break
|
||||
f.seek(offset)
|
||||
f.write(data)
|
||||
offset = newoffset
|
||||
size = f.tell()
|
||||
|
||||
t2 = time.time()
|
||||
f.close()
|
||||
|
||||
dt = t2-t1
|
||||
print size, "bytes in", dt, "seconds",
|
||||
if dt:
|
||||
print "i.e.", int(size/dt), "bytes/sec",
|
||||
print
|
||||
remote._recv(id) # ignored
|
||||
|
||||
def fl():
|
||||
sys.stdout.flush()
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
|
|
@ -0,0 +1,111 @@
|
|||
"""RPC Server module."""
|
||||
|
||||
import sys
|
||||
import socket
|
||||
import pickle
|
||||
from fnmatch import fnmatch
|
||||
from repr import repr
|
||||
|
||||
|
||||
# Default verbosity (0 = silent, 1 = print connections, 2 = print requests too)
|
||||
VERBOSE = 1
|
||||
|
||||
|
||||
class Server:
|
||||
|
||||
"""RPC Server class. Derive a class to implement a particular service."""
|
||||
|
||||
def __init__(self, address, verbose = VERBOSE):
|
||||
if type(address) == type(0):
|
||||
address = ('', address)
|
||||
self._address = address
|
||||
self._verbose = verbose
|
||||
self._socket = None
|
||||
self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
||||
self._socket.bind(address)
|
||||
self._socket.listen(1)
|
||||
self._listening = 1
|
||||
|
||||
def _setverbose(self, verbose):
|
||||
self._verbose = verbose
|
||||
|
||||
def __del__(self):
|
||||
self._close()
|
||||
|
||||
def _close(self):
|
||||
self._listening = 0
|
||||
if self._socket:
|
||||
self._socket.close()
|
||||
self._socket = None
|
||||
|
||||
def _serverloop(self):
|
||||
while self._listening:
|
||||
self._serve()
|
||||
|
||||
def _serve(self):
|
||||
if self._verbose: print "Wait for connection ..."
|
||||
conn, address = self._socket.accept()
|
||||
if self._verbose: print "Accepted connection from %s" % repr(address)
|
||||
if not self._verify(conn, address):
|
||||
print "*** Connection from %s refused" % repr(address)
|
||||
conn.close()
|
||||
return
|
||||
rf = conn.makefile('r')
|
||||
wf = conn.makefile('w')
|
||||
ok = 1
|
||||
while ok:
|
||||
wf.flush()
|
||||
if self._verbose > 1: print "Wait for next request ..."
|
||||
ok = self._dorequest(rf, wf)
|
||||
|
||||
_valid = ['192.16.201.*', '192.16.197.*']
|
||||
|
||||
def _verify(self, conn, address):
|
||||
host, port = address
|
||||
for pat in self._valid:
|
||||
if fnmatch(host, pat): return 1
|
||||
return 0
|
||||
|
||||
def _dorequest(self, rf, wf):
|
||||
rp = pickle.Unpickler(rf)
|
||||
try:
|
||||
request = rp.load()
|
||||
except EOFError:
|
||||
return 0
|
||||
if self._verbose > 1: print "Got request: %s" % repr(request)
|
||||
try:
|
||||
methodname, args, id = request
|
||||
if '.' in methodname:
|
||||
reply = (None, self._special(methodname, args), id)
|
||||
elif methodname[0] == '_':
|
||||
raise NameError, "illegal method name %s" % repr(methodname)
|
||||
else:
|
||||
method = getattr(self, methodname)
|
||||
reply = (None, apply(method, args), id)
|
||||
except:
|
||||
reply = (sys.exc_type, sys.exc_value, id)
|
||||
if id < 0 and reply[:2] == (None, None):
|
||||
if self._verbose > 1: print "Suppress reply"
|
||||
return 1
|
||||
if self._verbose > 1: print "Send reply: %s" % repr(reply)
|
||||
wp = pickle.Pickler(wf)
|
||||
wp.dump(reply)
|
||||
return 1
|
||||
|
||||
def _special(self, methodname, args):
|
||||
if methodname == '.methods':
|
||||
if not hasattr(self, '_methods'):
|
||||
self._methods = tuple(self._listmethods())
|
||||
return self._methods
|
||||
raise NameError, "unrecognized special method name %s" % repr(methodname)
|
||||
|
||||
def _listmethods(self, cl=None):
|
||||
if not cl: cl = self.__class__
|
||||
names = cl.__dict__.keys()
|
||||
names = filter(lambda x: x[0] != '_', names)
|
||||
names.sort()
|
||||
for base in cl.__bases__:
|
||||
basenames = self._listmethods(base)
|
||||
basenames = filter(lambda x, names=names: x not in names, basenames)
|
||||
names[len(names):] = basenames
|
||||
return names
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
import time
|
||||
import FSProxy
|
||||
|
||||
def main():
|
||||
t1 = time.time()
|
||||
#proxy = FSProxy.FSProxyClient(('voorn.cwi.nl', 4127))
|
||||
proxy = FSProxy.FSProxyLocal()
|
||||
sumtree(proxy)
|
||||
proxy._close()
|
||||
t2 = time.time()
|
||||
print t2-t1, "seconds"
|
||||
raw_input("[Return to exit] ")
|
||||
|
||||
def sumtree(proxy):
|
||||
print "PWD =", proxy.pwd()
|
||||
files = proxy.listfiles()
|
||||
proxy.infolist(files)
|
||||
subdirs = proxy.listsubdirs()
|
||||
for name in subdirs:
|
||||
proxy.cd(name)
|
||||
sumtree(proxy)
|
||||
proxy.back()
|
||||
|
||||
main()
|
||||
Loading…
Reference in New Issue