| 1 | """File System Proxy.
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| 2 |
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| 3 | Provide an OS-neutral view on a file system, locally or remotely.
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| 4 | The functionality is geared towards implementing some sort of
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| 5 | rdist-like utility between a Mac and a UNIX system.
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| 6 |
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| 7 | The module defines three classes:
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| 8 |
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| 9 | FSProxyLocal -- used for local access
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| 10 | FSProxyServer -- used on the server side of remote access
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| 11 | FSProxyClient -- used on the client side of remote access
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| 12 |
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| 13 | The remote classes are instantiated with an IP address and an optional
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| 14 | verbosity flag.
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| 15 | """
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| 16 |
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| 17 | import server
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| 18 | import client
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| 19 | import md5
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| 20 | import os
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| 21 | import fnmatch
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| 22 | from stat import *
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| 23 | import time
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| 24 | import fnmatch
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| 25 |
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| 26 | maxnamelen = 255
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| 27 |
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| 28 | skipnames = (os.curdir, os.pardir)
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| 29 |
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| 30 |
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| 31 | class FSProxyLocal:
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| 32 |
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| 33 | def __init__(self):
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| 34 | self._dirstack = []
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| 35 | self._ignore = ['*.pyc'] + self._readignore()
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| 36 |
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| 37 | def _close(self):
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| 38 | while self._dirstack:
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| 39 | self.back()
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| 40 |
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| 41 | def _readignore(self):
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| 42 | file = self._hide('ignore')
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| 43 | try:
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| 44 | f = open(file)
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| 45 | except IOError:
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| 46 | file = self._hide('synctree.ignorefiles')
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| 47 | try:
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| 48 | f = open(file)
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| 49 | except IOError:
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| 50 | return []
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| 51 | ignore = []
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| 52 | while 1:
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| 53 | line = f.readline()
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| 54 | if not line: break
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| 55 | if line[-1] == '\n': line = line[:-1]
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| 56 | ignore.append(line)
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| 57 | f.close()
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| 58 | return ignore
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| 59 |
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| 60 | def _hidden(self, name):
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| 61 | return name[0] == '.'
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| 62 |
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| 63 | def _hide(self, name):
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| 64 | return '.%s' % name
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| 65 |
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| 66 | def visible(self, name):
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| 67 | if len(name) > maxnamelen: return 0
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| 68 | if name[-1] == '~': return 0
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| 69 | if name in skipnames: return 0
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| 70 | if self._hidden(name): return 0
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| 71 | head, tail = os.path.split(name)
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| 72 | if head or not tail: return 0
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| 73 | if os.path.islink(name): return 0
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| 74 | if '\0' in open(name, 'rb').read(512): return 0
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| 75 | for ign in self._ignore:
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| 76 | if fnmatch.fnmatch(name, ign): return 0
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| 77 | return 1
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| 78 |
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| 79 | def check(self, name):
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| 80 | if not self.visible(name):
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| 81 | raise os.error, "protected name %s" % repr(name)
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| 82 |
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| 83 | def checkfile(self, name):
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| 84 | self.check(name)
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| 85 | if not os.path.isfile(name):
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| 86 | raise os.error, "not a plain file %s" % repr(name)
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| 87 |
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| 88 | def pwd(self):
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| 89 | return os.getcwd()
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| 90 |
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| 91 | def cd(self, name):
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| 92 | self.check(name)
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| 93 | save = os.getcwd(), self._ignore
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| 94 | os.chdir(name)
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| 95 | self._dirstack.append(save)
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| 96 | self._ignore = self._ignore + self._readignore()
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| 97 |
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| 98 | def back(self):
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| 99 | if not self._dirstack:
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| 100 | raise os.error, "empty directory stack"
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| 101 | dir, ignore = self._dirstack[-1]
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| 102 | os.chdir(dir)
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| 103 | del self._dirstack[-1]
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| 104 | self._ignore = ignore
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| 105 |
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| 106 | def _filter(self, files, pat = None):
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| 107 | if pat:
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| 108 | def keep(name, pat = pat):
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| 109 | return fnmatch.fnmatch(name, pat)
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| 110 | files = filter(keep, files)
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| 111 | files = filter(self.visible, files)
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| 112 | files.sort()
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| 113 | return files
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| 114 |
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| 115 | def list(self, pat = None):
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| 116 | files = os.listdir(os.curdir)
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| 117 | return self._filter(files, pat)
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| 118 |
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| 119 | def listfiles(self, pat = None):
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| 120 | files = os.listdir(os.curdir)
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| 121 | files = filter(os.path.isfile, files)
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| 122 | return self._filter(files, pat)
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| 123 |
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| 124 | def listsubdirs(self, pat = None):
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| 125 | files = os.listdir(os.curdir)
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| 126 | files = filter(os.path.isdir, files)
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| 127 | return self._filter(files, pat)
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| 128 |
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| 129 | def exists(self, name):
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| 130 | return self.visible(name) and os.path.exists(name)
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| 131 |
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| 132 | def isdir(self, name):
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| 133 | return self.visible(name) and os.path.isdir(name)
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| 134 |
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| 135 | def islink(self, name):
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| 136 | return self.visible(name) and os.path.islink(name)
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| 137 |
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| 138 | def isfile(self, name):
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| 139 | return self.visible(name) and os.path.isfile(name)
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| 140 |
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| 141 | def sum(self, name):
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| 142 | self.checkfile(name)
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| 143 | BUFFERSIZE = 1024*8
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| 144 | f = open(name)
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| 145 | sum = md5.new()
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| 146 | while 1:
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| 147 | buffer = f.read(BUFFERSIZE)
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| 148 | if not buffer:
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| 149 | break
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| 150 | sum.update(buffer)
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| 151 | return sum.digest()
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| 152 |
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| 153 | def size(self, name):
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| 154 | self.checkfile(name)
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| 155 | return os.stat(name)[ST_SIZE]
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| 156 |
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| 157 | def mtime(self, name):
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| 158 | self.checkfile(name)
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| 159 | return time.localtime(os.stat(name)[ST_MTIME])
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| 160 |
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| 161 | def stat(self, name):
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| 162 | self.checkfile(name)
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| 163 | size = os.stat(name)[ST_SIZE]
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| 164 | mtime = time.localtime(os.stat(name)[ST_MTIME])
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| 165 | return size, mtime
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| 166 |
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| 167 | def info(self, name):
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| 168 | sum = self.sum(name)
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| 169 | size = os.stat(name)[ST_SIZE]
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| 170 | mtime = time.localtime(os.stat(name)[ST_MTIME])
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| 171 | return sum, size, mtime
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| 172 |
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| 173 | def _list(self, function, list):
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| 174 | if list is None:
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| 175 | list = self.listfiles()
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| 176 | res = []
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| 177 | for name in list:
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| 178 | try:
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| 179 | res.append((name, function(name)))
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| 180 | except (os.error, IOError):
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| 181 | res.append((name, None))
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| 182 | return res
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| 183 |
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| 184 | def sumlist(self, list = None):
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| 185 | return self._list(self.sum, list)
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| 186 |
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| 187 | def statlist(self, list = None):
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| 188 | return self._list(self.stat, list)
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| 189 |
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| 190 | def mtimelist(self, list = None):
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| 191 | return self._list(self.mtime, list)
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| 192 |
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| 193 | def sizelist(self, list = None):
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| 194 | return self._list(self.size, list)
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| 195 |
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| 196 | def infolist(self, list = None):
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| 197 | return self._list(self.info, list)
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| 198 |
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| 199 | def _dict(self, function, list):
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| 200 | if list is None:
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| 201 | list = self.listfiles()
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| 202 | dict = {}
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| 203 | for name in list:
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| 204 | try:
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| 205 | dict[name] = function(name)
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| 206 | except (os.error, IOError):
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| 207 | pass
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| 208 | return dict
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| 209 |
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| 210 | def sumdict(self, list = None):
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| 211 | return self.dict(self.sum, list)
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| 212 |
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| 213 | def sizedict(self, list = None):
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| 214 | return self.dict(self.size, list)
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| 215 |
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| 216 | def mtimedict(self, list = None):
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| 217 | return self.dict(self.mtime, list)
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| 218 |
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| 219 | def statdict(self, list = None):
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| 220 | return self.dict(self.stat, list)
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| 221 |
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| 222 | def infodict(self, list = None):
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| 223 | return self._dict(self.info, list)
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| 224 |
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| 225 | def read(self, name, offset = 0, length = -1):
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| 226 | self.checkfile(name)
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| 227 | f = open(name)
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| 228 | f.seek(offset)
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| 229 | if length == 0:
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| 230 | data = ''
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| 231 | elif length < 0:
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| 232 | data = f.read()
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| 233 | else:
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| 234 | data = f.read(length)
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| 235 | f.close()
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| 236 | return data
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| 237 |
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| 238 | def create(self, name):
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| 239 | self.check(name)
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| 240 | if os.path.exists(name):
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| 241 | self.checkfile(name)
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| 242 | bname = name + '~'
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| 243 | try:
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| 244 | os.unlink(bname)
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| 245 | except os.error:
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| 246 | pass
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| 247 | os.rename(name, bname)
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| 248 | f = open(name, 'w')
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| 249 | f.close()
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| 250 |
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| 251 | def write(self, name, data, offset = 0):
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| 252 | self.checkfile(name)
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| 253 | f = open(name, 'r+')
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| 254 | f.seek(offset)
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| 255 | f.write(data)
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| 256 | f.close()
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| 257 |
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| 258 | def mkdir(self, name):
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| 259 | self.check(name)
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| 260 | os.mkdir(name, 0777)
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| 261 |
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| 262 | def rmdir(self, name):
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| 263 | self.check(name)
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| 264 | os.rmdir(name)
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| 265 |
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| 266 |
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| 267 | class FSProxyServer(FSProxyLocal, server.Server):
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| 268 |
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| 269 | def __init__(self, address, verbose = server.VERBOSE):
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| 270 | FSProxyLocal.__init__(self)
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| 271 | server.Server.__init__(self, address, verbose)
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| 272 |
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| 273 | def _close(self):
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| 274 | server.Server._close(self)
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| 275 | FSProxyLocal._close(self)
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| 276 |
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| 277 | def _serve(self):
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| 278 | server.Server._serve(self)
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| 279 | # Retreat into start directory
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| 280 | while self._dirstack: self.back()
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| 281 |
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| 282 |
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| 283 | class FSProxyClient(client.Client):
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| 284 |
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| 285 | def __init__(self, address, verbose = client.VERBOSE):
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| 286 | client.Client.__init__(self, address, verbose)
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| 287 |
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| 288 |
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| 289 | def test():
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| 290 | import string
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| 291 | import sys
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| 292 | if sys.argv[1:]:
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| 293 | port = string.atoi(sys.argv[1])
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| 294 | else:
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| 295 | port = 4127
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| 296 | proxy = FSProxyServer(('', port))
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| 297 | proxy._serverloop()
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| 298 |
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| 299 |
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| 300 | if __name__ == '__main__':
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| 301 | test()
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