| 4710c53d |
1 | """File System Proxy.\r |
| 2 | \r |
| 3 | Provide an OS-neutral view on a file system, locally or remotely.\r |
| 4 | The functionality is geared towards implementing some sort of\r |
| 5 | rdist-like utility between a Mac and a UNIX system.\r |
| 6 | \r |
| 7 | The module defines three classes:\r |
| 8 | \r |
| 9 | FSProxyLocal -- used for local access\r |
| 10 | FSProxyServer -- used on the server side of remote access\r |
| 11 | FSProxyClient -- used on the client side of remote access\r |
| 12 | \r |
| 13 | The remote classes are instantiated with an IP address and an optional\r |
| 14 | verbosity flag.\r |
| 15 | """\r |
| 16 | \r |
| 17 | import server\r |
| 18 | import client\r |
| 19 | import md5\r |
| 20 | import os\r |
| 21 | import fnmatch\r |
| 22 | from stat import *\r |
| 23 | import time\r |
| 24 | import fnmatch\r |
| 25 | \r |
| 26 | maxnamelen = 255\r |
| 27 | \r |
| 28 | skipnames = (os.curdir, os.pardir)\r |
| 29 | \r |
| 30 | \r |
| 31 | class FSProxyLocal:\r |
| 32 | \r |
| 33 | def __init__(self):\r |
| 34 | self._dirstack = []\r |
| 35 | self._ignore = ['*.pyc'] + self._readignore()\r |
| 36 | \r |
| 37 | def _close(self):\r |
| 38 | while self._dirstack:\r |
| 39 | self.back()\r |
| 40 | \r |
| 41 | def _readignore(self):\r |
| 42 | file = self._hide('ignore')\r |
| 43 | try:\r |
| 44 | f = open(file)\r |
| 45 | except IOError:\r |
| 46 | file = self._hide('synctree.ignorefiles')\r |
| 47 | try:\r |
| 48 | f = open(file)\r |
| 49 | except IOError:\r |
| 50 | return []\r |
| 51 | ignore = []\r |
| 52 | while 1:\r |
| 53 | line = f.readline()\r |
| 54 | if not line: break\r |
| 55 | if line[-1] == '\n': line = line[:-1]\r |
| 56 | ignore.append(line)\r |
| 57 | f.close()\r |
| 58 | return ignore\r |
| 59 | \r |
| 60 | def _hidden(self, name):\r |
| 61 | return name[0] == '.'\r |
| 62 | \r |
| 63 | def _hide(self, name):\r |
| 64 | return '.%s' % name\r |
| 65 | \r |
| 66 | def visible(self, name):\r |
| 67 | if len(name) > maxnamelen: return 0\r |
| 68 | if name[-1] == '~': return 0\r |
| 69 | if name in skipnames: return 0\r |
| 70 | if self._hidden(name): return 0\r |
| 71 | head, tail = os.path.split(name)\r |
| 72 | if head or not tail: return 0\r |
| 73 | if os.path.islink(name): return 0\r |
| 74 | if '\0' in open(name, 'rb').read(512): return 0\r |
| 75 | for ign in self._ignore:\r |
| 76 | if fnmatch.fnmatch(name, ign): return 0\r |
| 77 | return 1\r |
| 78 | \r |
| 79 | def check(self, name):\r |
| 80 | if not self.visible(name):\r |
| 81 | raise os.error, "protected name %s" % repr(name)\r |
| 82 | \r |
| 83 | def checkfile(self, name):\r |
| 84 | self.check(name)\r |
| 85 | if not os.path.isfile(name):\r |
| 86 | raise os.error, "not a plain file %s" % repr(name)\r |
| 87 | \r |
| 88 | def pwd(self):\r |
| 89 | return os.getcwd()\r |
| 90 | \r |
| 91 | def cd(self, name):\r |
| 92 | self.check(name)\r |
| 93 | save = os.getcwd(), self._ignore\r |
| 94 | os.chdir(name)\r |
| 95 | self._dirstack.append(save)\r |
| 96 | self._ignore = self._ignore + self._readignore()\r |
| 97 | \r |
| 98 | def back(self):\r |
| 99 | if not self._dirstack:\r |
| 100 | raise os.error, "empty directory stack"\r |
| 101 | dir, ignore = self._dirstack[-1]\r |
| 102 | os.chdir(dir)\r |
| 103 | del self._dirstack[-1]\r |
| 104 | self._ignore = ignore\r |
| 105 | \r |
| 106 | def _filter(self, files, pat = None):\r |
| 107 | if pat:\r |
| 108 | def keep(name, pat = pat):\r |
| 109 | return fnmatch.fnmatch(name, pat)\r |
| 110 | files = filter(keep, files)\r |
| 111 | files = filter(self.visible, files)\r |
| 112 | files.sort()\r |
| 113 | return files\r |
| 114 | \r |
| 115 | def list(self, pat = None):\r |
| 116 | files = os.listdir(os.curdir)\r |
| 117 | return self._filter(files, pat)\r |
| 118 | \r |
| 119 | def listfiles(self, pat = None):\r |
| 120 | files = os.listdir(os.curdir)\r |
| 121 | files = filter(os.path.isfile, files)\r |
| 122 | return self._filter(files, pat)\r |
| 123 | \r |
| 124 | def listsubdirs(self, pat = None):\r |
| 125 | files = os.listdir(os.curdir)\r |
| 126 | files = filter(os.path.isdir, files)\r |
| 127 | return self._filter(files, pat)\r |
| 128 | \r |
| 129 | def exists(self, name):\r |
| 130 | return self.visible(name) and os.path.exists(name)\r |
| 131 | \r |
| 132 | def isdir(self, name):\r |
| 133 | return self.visible(name) and os.path.isdir(name)\r |
| 134 | \r |
| 135 | def islink(self, name):\r |
| 136 | return self.visible(name) and os.path.islink(name)\r |
| 137 | \r |
| 138 | def isfile(self, name):\r |
| 139 | return self.visible(name) and os.path.isfile(name)\r |
| 140 | \r |
| 141 | def sum(self, name):\r |
| 142 | self.checkfile(name)\r |
| 143 | BUFFERSIZE = 1024*8\r |
| 144 | f = open(name)\r |
| 145 | sum = md5.new()\r |
| 146 | while 1:\r |
| 147 | buffer = f.read(BUFFERSIZE)\r |
| 148 | if not buffer:\r |
| 149 | break\r |
| 150 | sum.update(buffer)\r |
| 151 | return sum.digest()\r |
| 152 | \r |
| 153 | def size(self, name):\r |
| 154 | self.checkfile(name)\r |
| 155 | return os.stat(name)[ST_SIZE]\r |
| 156 | \r |
| 157 | def mtime(self, name):\r |
| 158 | self.checkfile(name)\r |
| 159 | return time.localtime(os.stat(name)[ST_MTIME])\r |
| 160 | \r |
| 161 | def stat(self, name):\r |
| 162 | self.checkfile(name)\r |
| 163 | size = os.stat(name)[ST_SIZE]\r |
| 164 | mtime = time.localtime(os.stat(name)[ST_MTIME])\r |
| 165 | return size, mtime\r |
| 166 | \r |
| 167 | def info(self, name):\r |
| 168 | sum = self.sum(name)\r |
| 169 | size = os.stat(name)[ST_SIZE]\r |
| 170 | mtime = time.localtime(os.stat(name)[ST_MTIME])\r |
| 171 | return sum, size, mtime\r |
| 172 | \r |
| 173 | def _list(self, function, list):\r |
| 174 | if list is None:\r |
| 175 | list = self.listfiles()\r |
| 176 | res = []\r |
| 177 | for name in list:\r |
| 178 | try:\r |
| 179 | res.append((name, function(name)))\r |
| 180 | except (os.error, IOError):\r |
| 181 | res.append((name, None))\r |
| 182 | return res\r |
| 183 | \r |
| 184 | def sumlist(self, list = None):\r |
| 185 | return self._list(self.sum, list)\r |
| 186 | \r |
| 187 | def statlist(self, list = None):\r |
| 188 | return self._list(self.stat, list)\r |
| 189 | \r |
| 190 | def mtimelist(self, list = None):\r |
| 191 | return self._list(self.mtime, list)\r |
| 192 | \r |
| 193 | def sizelist(self, list = None):\r |
| 194 | return self._list(self.size, list)\r |
| 195 | \r |
| 196 | def infolist(self, list = None):\r |
| 197 | return self._list(self.info, list)\r |
| 198 | \r |
| 199 | def _dict(self, function, list):\r |
| 200 | if list is None:\r |
| 201 | list = self.listfiles()\r |
| 202 | dict = {}\r |
| 203 | for name in list:\r |
| 204 | try:\r |
| 205 | dict[name] = function(name)\r |
| 206 | except (os.error, IOError):\r |
| 207 | pass\r |
| 208 | return dict\r |
| 209 | \r |
| 210 | def sumdict(self, list = None):\r |
| 211 | return self.dict(self.sum, list)\r |
| 212 | \r |
| 213 | def sizedict(self, list = None):\r |
| 214 | return self.dict(self.size, list)\r |
| 215 | \r |
| 216 | def mtimedict(self, list = None):\r |
| 217 | return self.dict(self.mtime, list)\r |
| 218 | \r |
| 219 | def statdict(self, list = None):\r |
| 220 | return self.dict(self.stat, list)\r |
| 221 | \r |
| 222 | def infodict(self, list = None):\r |
| 223 | return self._dict(self.info, list)\r |
| 224 | \r |
| 225 | def read(self, name, offset = 0, length = -1):\r |
| 226 | self.checkfile(name)\r |
| 227 | f = open(name)\r |
| 228 | f.seek(offset)\r |
| 229 | if length == 0:\r |
| 230 | data = ''\r |
| 231 | elif length < 0:\r |
| 232 | data = f.read()\r |
| 233 | else:\r |
| 234 | data = f.read(length)\r |
| 235 | f.close()\r |
| 236 | return data\r |
| 237 | \r |
| 238 | def create(self, name):\r |
| 239 | self.check(name)\r |
| 240 | if os.path.exists(name):\r |
| 241 | self.checkfile(name)\r |
| 242 | bname = name + '~'\r |
| 243 | try:\r |
| 244 | os.unlink(bname)\r |
| 245 | except os.error:\r |
| 246 | pass\r |
| 247 | os.rename(name, bname)\r |
| 248 | f = open(name, 'w')\r |
| 249 | f.close()\r |
| 250 | \r |
| 251 | def write(self, name, data, offset = 0):\r |
| 252 | self.checkfile(name)\r |
| 253 | f = open(name, 'r+')\r |
| 254 | f.seek(offset)\r |
| 255 | f.write(data)\r |
| 256 | f.close()\r |
| 257 | \r |
| 258 | def mkdir(self, name):\r |
| 259 | self.check(name)\r |
| 260 | os.mkdir(name, 0777)\r |
| 261 | \r |
| 262 | def rmdir(self, name):\r |
| 263 | self.check(name)\r |
| 264 | os.rmdir(name)\r |
| 265 | \r |
| 266 | \r |
| 267 | class FSProxyServer(FSProxyLocal, server.Server):\r |
| 268 | \r |
| 269 | def __init__(self, address, verbose = server.VERBOSE):\r |
| 270 | FSProxyLocal.__init__(self)\r |
| 271 | server.Server.__init__(self, address, verbose)\r |
| 272 | \r |
| 273 | def _close(self):\r |
| 274 | server.Server._close(self)\r |
| 275 | FSProxyLocal._close(self)\r |
| 276 | \r |
| 277 | def _serve(self):\r |
| 278 | server.Server._serve(self)\r |
| 279 | # Retreat into start directory\r |
| 280 | while self._dirstack: self.back()\r |
| 281 | \r |
| 282 | \r |
| 283 | class FSProxyClient(client.Client):\r |
| 284 | \r |
| 285 | def __init__(self, address, verbose = client.VERBOSE):\r |
| 286 | client.Client.__init__(self, address, verbose)\r |
| 287 | \r |
| 288 | \r |
| 289 | def test():\r |
| 290 | import string\r |
| 291 | import sys\r |
| 292 | if sys.argv[1:]:\r |
| 293 | port = string.atoi(sys.argv[1])\r |
| 294 | else:\r |
| 295 | port = 4127\r |
| 296 | proxy = FSProxyServer(('', port))\r |
| 297 | proxy._serverloop()\r |
| 298 | \r |
| 299 | \r |
| 300 | if __name__ == '__main__':\r |
| 301 | test()\r |
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