[36] | 1 | # Module handling the download of updates
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| 2 |
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| 3 | #------------------------------------------------------------------------------
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| 4 |
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| 5 | from config import Config
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| 6 |
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| 7 | import os
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| 8 | import sys
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| 9 | import urllib2
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| 10 | import tempfile
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| 11 | import socket
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| 12 | import subprocess
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[37] | 13 | import hashlib
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[36] | 14 |
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| 15 | #------------------------------------------------------------------------------
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| 16 |
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| 17 | manifestName = "MLXMANIFEST"
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[37] | 18 | toremoveName = "toremove"
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[36] | 19 |
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| 20 | #------------------------------------------------------------------------------
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| 21 |
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| 22 | class Manifest(object):
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| 23 | """The manifest of the files.
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| 24 |
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| 25 | The manifest file consists of one line for each file. Each line contains 3
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| 26 | items separated by tabs:
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| 27 | - the path of the file relative to the distribution's root
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| 28 | - the size of the file
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| 29 | - the MD5 sum of the file."""
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| 30 | def __init__(self):
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| 31 | """Construct the manifest."""
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| 32 | self._files = {}
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| 33 |
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| 34 | @property
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| 35 | def files(self):
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| 36 | """Get an iterator over the files.
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| 37 |
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| 38 | Each file is returned as a 3-tuple with items as in the file."""
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| 39 | for (path, (size, sum)) in self._files.iteritems():
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| 40 | yield (path, size, sum)
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| 41 |
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| 42 | def addFile(self, path, size, sum):
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| 43 | """Add a file to the manifest."""
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[37] | 44 | self._files[path] = (size, sum)
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[36] | 45 |
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[37] | 46 | def addFiles(self, baseDirectory, subdirectory):
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| 47 | """Add the files in the given directory and subdirectories of it to the
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| 48 | manifest."""
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| 49 | directory = baseDirectory
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| 50 | for d in subdirectory: directory = os.path.join(directory, d)
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| 51 |
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| 52 | for entry in os.listdir(directory):
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| 53 | fullPath = os.path.join(directory, entry)
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| 54 | if os.path.isfile(fullPath):
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| 55 | size = os.stat(fullPath).st_size
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| 56 | sum = hashlib.md5()
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| 57 | with open(fullPath, "rb") as f:
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| 58 | while True:
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| 59 | data = f.read(4096)
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| 60 | if data: sum.update(data)
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| 61 | else: break
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| 62 | self.addFile("/".join(subdirectory + [entry]), size,
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| 63 | sum.hexdigest())
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| 64 | elif os.path.isdir(fullPath):
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| 65 | self.addFiles(baseDirectory, subdirectory + [entry])
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| 66 |
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[36] | 67 | def readFrom(self, file):
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| 68 | """Read a manifest from the given file object."""
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| 69 | for line in iter(file.readline, ""):
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| 70 | (path, size, sum) = line.strip().split("\t")
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| 71 | self._files[path] = (int(size), sum)
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| 72 |
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| 73 | def writeInto(self, file):
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| 74 | """Write the manifest into the file at the given path."""
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| 75 | for (path, (size, sum)) in self._files.iteritems():
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| 76 | file.write("%s\t%d\t%s\n" % (path, size, sum))
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| 77 |
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| 78 | def compare(self, other):
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| 79 | """Compare this manifest with the other one.
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| 80 |
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| 81 | This returns a tuple of two lists:
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| 82 | - the files that are either different or are present in other, but not
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| 83 | here. Each file is returned as a 3-tuple as with other functions, the
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| 84 | size and sum are those of the new file.
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| 85 | - the paths of the files that are present here, but not in other."""
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| 86 | modifiedAndNew = []
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| 87 | for (path, otherSize, otherSum) in other.files:
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| 88 | if path in self._files:
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| 89 | (size, sum) = self._files[path]
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| 90 | if size!=otherSize or sum!=otherSum:
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| 91 | modifiedAndNew.append((path, otherSize, otherSum))
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| 92 | else:
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| 93 | modifiedAndNew.append((path, otherSize, otherSum))
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| 94 |
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| 95 | removed = [path for path in self._files if path not in other._files]
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| 96 |
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| 97 | return (modifiedAndNew, removed)
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| 98 |
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| 99 | #------------------------------------------------------------------------------
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| 100 |
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| 101 | class ClientListener(object):
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| 102 | """A listener that sends any requests via a socket."""
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| 103 | def __init__(self, sock):
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| 104 | """Construct the listener."""
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| 105 | self._sock = sock
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| 106 |
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| 107 | def downloadingManifest(self):
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| 108 | """Called when the downloading of the manifest has started."""
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| 109 | self._send(["downloadingManifest"])
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| 110 |
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| 111 | def downloadedManifest(self):
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| 112 | """Called when the manifest has been downloaded."""
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| 113 | self._send(["downloadedManifest"])
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| 114 |
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| 115 | def needSudo(self):
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| 116 | """Called when an admin-level program must be called to complete the
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| 117 | update.
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| 118 |
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| 119 | This is not valid from a client, as that client is supposed to be the
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| 120 | admin-level program :)"""
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| 121 | assert False
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| 122 |
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[37] | 123 | def setTotalSize(self, numToModifyAndNew, totalSize, numToRemove,
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| 124 | numToRemoveLocal):
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[36] | 125 | """Called when starting the downloading of the files."""
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| 126 | self._send(["setTotalSize", str(numToModifyAndNew), str(totalSize),
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[37] | 127 | str(numToRemove), str(numToRemoveLocal)])
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[36] | 128 |
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| 129 | def setDownloaded(self, downloaded):
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| 130 | """Called periodically after downloading a certain amount of data."""
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| 131 | self._send(["setDownloaded", str(downloaded)])
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| 132 |
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| 133 | def startRenaming(self):
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| 134 | """Called when the renaming of the downloaded files is started."""
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| 135 | self._send(["startRenaming"])
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| 136 |
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| 137 | def renamed(self, path, count):
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| 138 | """Called when a file has been renamed."""
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| 139 | self._send(["renamed", path, str(count)])
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| 140 |
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| 141 | def startRemoving(self):
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| 142 | """Called when the removing of files has started."""
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| 143 | self._send(["startRemoving"])
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| 144 |
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| 145 | def removed(self, path, count):
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| 146 | """Called when a file has been removed."""
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| 147 | self._send(["removed", path, str(count)])
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| 148 |
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| 149 | def writingManifest(self):
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| 150 | """Called when we have started writing the manifest."""
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| 151 | self._send(["writingManifest"])
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| 152 |
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| 153 | def done(self):
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| 154 | """Called when the update has completed."""
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| 155 | self._send(["done"])
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| 156 |
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| 157 | def failed(self, what):
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| 158 | """Called when something has failed."""
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| 159 | self._send(["failed", what])
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| 160 |
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| 161 | def _send(self, words):
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| 162 | """Send the given words via the socket."""
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| 163 | self._sock.send("\t".join(words) + "\n")
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| 164 |
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| 165 | #------------------------------------------------------------------------------
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| 166 |
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| 167 | def readLocalManifest(directory):
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| 168 | """Read the local manifest from the given directory."""
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| 169 | manifestPath = os.path.join(directory, manifestName)
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| 170 |
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| 171 | manifest = Manifest()
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| 172 | try:
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| 173 | with open(manifestPath, "rt") as f:
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| 174 | manifest.readFrom(f)
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| 175 | except Exception, e:
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| 176 | print "Error reading the manifest, ignoring:", str(e)
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| 177 | manifest = Manifest()
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| 178 |
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| 179 | return manifest
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| 180 |
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| 181 | #------------------------------------------------------------------------------
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| 182 |
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| 183 | def prepareUpdate(directory, updateURL, listener):
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| 184 | """Prepare the update by downloading the manifest and comparing it with the
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| 185 | local one."""
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| 186 | manifest = readLocalManifest(directory)
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| 187 |
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| 188 | updateURL += "/" + os.name
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| 189 |
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| 190 | listener.downloadingManifest()
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| 191 | f = None
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| 192 | try:
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| 193 | updateManifest = Manifest()
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| 194 | f= urllib2.urlopen(updateURL + "/" + manifestName)
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| 195 | updateManifest.readFrom(f)
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| 196 |
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| 197 | except Exception, e:
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| 198 | print >> sys.stderr, "Error downloading manifest:", str(e)
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| 199 | listener.failed(str(e))
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| 200 | return None
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| 201 | finally:
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| 202 | if f is not None: f.close()
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| 203 |
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| 204 | listener.downloadedManifest()
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| 205 |
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| 206 | (modifiedAndNew, removed) = manifest.compare(updateManifest)
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| 207 |
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| 208 | return (manifest, updateManifest, modifiedAndNew, removed)
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| 209 |
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| 210 | #------------------------------------------------------------------------------
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| 211 |
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[37] | 212 | def getToremoveFiles(directory):
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| 213 | """Add the files to remove from the toremove directory."""
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| 214 | toremove = []
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| 215 | toremoveDirectory = os.path.join(directory, toremoveName)
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| 216 | if os.path.isdir(toremoveDirectory):
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| 217 | for entry in os.listdir(toremoveDirectory):
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| 218 | toremove.append(os.path.join(toremoveName, entry))
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| 219 | return toremove
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| 220 |
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| 221 | #------------------------------------------------------------------------------
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| 222 |
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[36] | 223 | def createLocalPath(directory, path):
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| 224 | """Create a local path from the given manifest path."""
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| 225 | localPath = directory
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| 226 | for element in path.split("/"):
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| 227 | localPath = os.path.join(localPath, element)
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| 228 | return localPath
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| 229 |
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| 230 | #------------------------------------------------------------------------------
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| 231 |
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[37] | 232 | def getToremoveDir(toremoveDir, directory):
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| 233 | """Get the path of the directory that will contain the files that are to be
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| 234 | removed."""
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| 235 | if toremoveDir is None:
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| 236 | toremoveDir = os.path.join(directory, toremoveName)
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| 237 | try:
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| 238 | os.mkdir(toremoveDir)
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| 239 | except:
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| 240 | pass
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| 241 |
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| 242 | return toremoveDir
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| 243 |
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| 244 | #------------------------------------------------------------------------------
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| 245 |
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| 246 | def removeFile(toremoveDir, directory, path):
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| 247 | """Remove the file at the given path or store it in a temporary directory.
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| 248 |
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| 249 | If the removal of the file fails, it will be stored in a temporary
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| 250 | directory. This is useful for files thay may be open and cannot be removed
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| 251 | right away."""
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| 252 | try:
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| 253 | os.remove(path)
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| 254 | except:
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| 255 | try:
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| 256 | sum = hashlib.md5()
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| 257 | sum.update(path)
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| 258 | toremoveDir = getToremoveDir(toremoveDir, directory)
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| 259 | os.rename(path, os.path.join(toremoveDir, sum.hexdigest()))
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| 260 | except Exception, e:
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| 261 | print "Cannot remove file " + path + ": " + str(e)
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| 262 |
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| 263 | #------------------------------------------------------------------------------
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| 264 |
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[36] | 265 | def updateFiles(directory, updateURL, listener,
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[37] | 266 | manifest, modifiedAndNew, removed, localRemoved):
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[36] | 267 | """Update the files according to the given information."""
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| 268 | totalSize = 0
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| 269 | for (path, size, sum) in modifiedAndNew:
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| 270 | totalSize += size
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| 271 |
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[37] | 272 | listener.setTotalSize(len(modifiedAndNew), totalSize,
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| 273 | len(removed), len(localRemoved))
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[36] | 274 |
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| 275 | downloaded = 0
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| 276 | fin = None
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[37] | 277 | toremoveDir = None
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| 278 |
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[36] | 279 | try:
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| 280 | updateURL += "/" + os.name
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| 281 |
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| 282 | for (path, size, sum) in modifiedAndNew:
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| 283 | targetFile = createLocalPath(directory, path)
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| 284 | targetFile += "."
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| 285 | targetFile += sum
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| 286 |
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| 287 | targetDirectory = os.path.dirname(targetFile)
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| 288 | if not os.path.isdir(targetDirectory):
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| 289 | os.makedirs(targetDirectory)
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| 290 |
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| 291 | with open(targetFile, "wb") as fout:
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| 292 | fin = urllib2.urlopen(updateURL + "/" + path)
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| 293 | while True:
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| 294 | data = fin.read(4096)
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| 295 | if not data:
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| 296 | break
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| 297 | fout.write(data)
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| 298 | downloaded += len(data)
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| 299 | listener.setDownloaded(downloaded)
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| 300 | fin.close()
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| 301 | fin = None
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[37] | 302 |
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[36] | 303 | listener.startRenaming()
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| 304 | count = 0
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| 305 | for (path, size, sum) in modifiedAndNew:
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| 306 | targetFile = createLocalPath(directory, path)
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| 307 |
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| 308 | downloadedFile = targetFile + "." + sum
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| 309 | if os.name=="nt" and os.path.isfile(targetFile):
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[37] | 310 | removeFile(toremoveDir, directory, targetFile)
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[36] | 311 | os.rename(downloadedFile, targetFile)
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| 312 | count += 1
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| 313 | listener.renamed(path, count)
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| 314 |
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| 315 | listener.startRemoving()
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| 316 | count = 0
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[37] | 317 | removed += localRemoved
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| 318 | removed.sort(reverse = True)
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[36] | 319 | for path in removed:
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[37] | 320 | removePath = createLocalPath(directory, path)
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| 321 | removeFile(toremoveDir, directory, removePath)
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| 322 |
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| 323 | removeDirectory = os.path.dirname(removePath)
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[36] | 324 | try:
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[37] | 325 | os.removedirs(removeDirectory)
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[36] | 326 | except:
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| 327 | pass
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[37] | 328 |
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| 329 | count += 1
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[36] | 330 | listener.removed(path, count)
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| 331 |
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| 332 | listener.writingManifest()
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| 333 |
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| 334 | manifestPath = os.path.join(directory, manifestName)
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| 335 | with open(manifestPath, "wt") as f:
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| 336 | manifest.writeInto(f)
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| 337 |
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| 338 | listener.done()
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| 339 | except Exception, e:
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| 340 | print >> sys.stderr, "Error:", str(e)
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| 341 | listener.failed(str(e))
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| 342 |
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| 343 | #------------------------------------------------------------------------------
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| 344 |
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| 345 | def isDirectoryWritable(directory):
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| 346 | """Determine if the given directory can be written."""
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| 347 | checkFile = os.path.join(directory, "writable.chk")
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| 348 | try:
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| 349 | f = open(checkFile, "wt")
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| 350 | f.close()
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| 351 | return True
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| 352 | except Exception, e:
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| 353 | return False
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| 354 | finally:
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| 355 | try:
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| 356 | os.remove(checkFile)
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| 357 | except:
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| 358 | pass
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| 359 |
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| 360 | #------------------------------------------------------------------------------
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| 361 |
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| 362 | def processMLXUpdate(buffer, listener):
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| 363 | """Process the given buffer supposedly containing a list of commands."""
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| 364 | endsWithLine = buffer[-1]=="\n"
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| 365 | lines = buffer.splitlines()
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| 366 |
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| 367 | if endsWithLine:
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| 368 | buffer = ""
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| 369 | else:
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| 370 | buffer = lines[-1]
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| 371 | lines = lines[:-1]
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| 372 |
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| 373 | for line in lines:
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| 374 | words = line.split("\t")
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| 375 | try:
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| 376 | command = words[0]
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| 377 | if command=="downloadingManifest":
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| 378 | listener.downloadingManifest()
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| 379 | elif command=="downloadedManifest":
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| 380 | listener.downloadedManifest()
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| 381 | elif command=="setTotalSize":
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| 382 | listener.setTotalSize(int(words[1]), long(words[2]),
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[37] | 383 | int(words[3]), int(words[4]))
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[36] | 384 | elif command=="setDownloaded":
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| 385 | listener.setDownloaded(long(words[1]))
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| 386 | elif command=="startRenaming":
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| 387 | listener.startRenaming()
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| 388 | elif command=="renamed":
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| 389 | listener.renamed(words[1], int(words[2]))
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| 390 | elif command=="startRemoving":
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| 391 | listener.startRemoving()
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| 392 | elif command=="removed":
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| 393 | listener.removed(words[1], int(words[2]))
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| 394 | elif command=="writingManifest":
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| 395 | listener.writingManifest()
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| 396 | elif command=="done":
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| 397 | listener.done()
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| 398 | elif command=="failed":
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| 399 | listener.failed(words[1])
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| 400 | except Exception, e:
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| 401 | print >> sys.stderr, "Failed to parse line '%s': %s" % \
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| 402 | (line, str(e))
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| 403 |
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| 404 | return buffer
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| 405 |
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| 406 | #------------------------------------------------------------------------------
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| 407 |
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| 408 | def sudoUpdate(directory, updateURL, listener, manifest):
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| 409 | """Perform the update via the mlxupdate program."""
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| 410 | manifestFD = None
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| 411 | manifestFile = None
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| 412 | serverSocket = None
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| 413 | mlxUpdateSocket = None
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| 414 | try:
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| 415 | (manifestFD, manifestFile) = tempfile.mkstemp()
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| 416 | f = os.fdopen(manifestFD, "wt")
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| 417 | try:
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| 418 | manifest.writeInto(f)
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| 419 | finally:
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| 420 | f.close()
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| 421 | manifestFD = None
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| 422 |
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| 423 | serverSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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| 424 | serverSocket.bind(("127.0.0.1", 0))
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| 425 | (_host, port) = serverSocket.getsockname()
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| 426 | serverSocket.listen(1)
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| 427 |
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| 428 | process = subprocess.Popen([os.path.join(directory, "mlxupdate"),
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| 429 | str(port), manifestFile],
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| 430 | shell = os.name=="nt")
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| 431 |
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| 432 | (mlxUpdateSocket, _) = serverSocket.accept()
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| 433 | serverSocket.close()
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| 434 | serverSocket = None
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| 435 |
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| 436 | buffer = ""
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| 437 | while True:
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| 438 | data = mlxUpdateSocket.recv(4096)
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| 439 | if not data:
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| 440 | break;
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| 441 |
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| 442 | buffer += data
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| 443 | buffer = processMLXUpdate(buffer, listener)
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| 444 |
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| 445 | mlxUpdateSocket.close()
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| 446 | mlxUpdateSocket = None
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| 447 |
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| 448 | process.wait()
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| 449 | except Exception, e:
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| 450 | print >> sys.stderr, "Failed updating:", str(e)
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| 451 | listener.failed(str(e))
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| 452 | finally:
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| 453 | if serverSocket is not None:
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| 454 | try:
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| 455 | serverSocket.close()
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| 456 | except:
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| 457 | pass
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| 458 | if mlxUpdateSocket is not None:
|
---|
| 459 | try:
|
---|
| 460 | mlxUpdateSocket.close()
|
---|
| 461 | except:
|
---|
| 462 | pass
|
---|
| 463 | if manifestFD is not None:
|
---|
| 464 | try:
|
---|
| 465 | os.close(manifestFD)
|
---|
| 466 | except:
|
---|
| 467 | pass
|
---|
| 468 | if manifestFile is not None:
|
---|
| 469 | try:
|
---|
| 470 | os.remove(manifestFile)
|
---|
| 471 | except:
|
---|
| 472 | pass
|
---|
| 473 |
|
---|
| 474 |
|
---|
| 475 | #------------------------------------------------------------------------------
|
---|
| 476 |
|
---|
| 477 | def update(directory, updateURL, listener, fromGUI = False):
|
---|
| 478 | """Perform the update."""
|
---|
| 479 | result = prepareUpdate(directory, updateURL, listener)
|
---|
| 480 | if result is None:
|
---|
| 481 | return
|
---|
| 482 |
|
---|
| 483 | (manifest, updateManifest, modifiedAndNew, removed) = result
|
---|
[37] | 484 | localRemoved = getToremoveFiles(directory)
|
---|
[36] | 485 |
|
---|
[37] | 486 | if not modifiedAndNew and not removed and not localRemoved:
|
---|
[36] | 487 | listener.done()
|
---|
| 488 | return
|
---|
| 489 |
|
---|
| 490 | if fromGUI and not isDirectoryWritable(directory):
|
---|
| 491 | if listener.needSudo():
|
---|
| 492 | sudoUpdate(directory, updateURL, listener,
|
---|
| 493 | updateManifest)
|
---|
| 494 | else:
|
---|
| 495 | updateFiles(directory, updateURL, listener, updateManifest,
|
---|
[37] | 496 | modifiedAndNew, removed, localRemoved)
|
---|
[36] | 497 |
|
---|
| 498 | #------------------------------------------------------------------------------
|
---|
| 499 |
|
---|
| 500 | def updateProcess():
|
---|
| 501 | """This is called in the child process, when we need a child process."""
|
---|
| 502 | clientSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
---|
| 503 | clientSocket.connect(("127.0.0.1", int(sys.argv[1])))
|
---|
| 504 |
|
---|
| 505 | config = Config()
|
---|
| 506 |
|
---|
| 507 | directory = os.path.dirname(sys.argv[0])
|
---|
| 508 |
|
---|
| 509 | manifest = readLocalManifest(directory)
|
---|
| 510 |
|
---|
| 511 | updateManifest = Manifest()
|
---|
| 512 | with open(sys.argv[2], "rt") as f:
|
---|
| 513 | updateManifest.readFrom(f)
|
---|
| 514 |
|
---|
| 515 | (modifiedAndNew, removed) = manifest.compare(updateManifest)
|
---|
[37] | 516 | localRemoved = getToremoveFiles(directory)
|
---|
[36] | 517 |
|
---|
| 518 | updateFiles(directory, config.updateURL,
|
---|
| 519 | ClientListener(clientSocket),
|
---|
[37] | 520 | updateManifest, modifiedAndNew, removed, localRemoved)
|
---|
| 521 |
|
---|
| 522 | #------------------------------------------------------------------------------
|
---|
| 523 |
|
---|
| 524 | def buildManifest(directory):
|
---|
| 525 | """Build a manifest from the contents of the given directory, into the
|
---|
| 526 | given directory."""
|
---|
| 527 |
|
---|
| 528 | manifestPath = os.path.join(directory, manifestName)
|
---|
| 529 | try:
|
---|
| 530 | os.remove(manifestPath)
|
---|
| 531 | except:
|
---|
| 532 | pass
|
---|
| 533 |
|
---|
| 534 | manifest = Manifest()
|
---|
| 535 | manifest.addFiles(directory, [])
|
---|
| 536 | with open(manifestPath, "wt") as f:
|
---|
| 537 | manifest.writeInto(f)
|
---|
[36] | 538 |
|
---|
| 539 | #------------------------------------------------------------------------------
|
---|
| 540 |
|
---|
[37] | 541 | # if __name__ == "__main__":
|
---|
| 542 | # manifest1 = Manifest()
|
---|
| 543 | # manifest1.addFile("file1.exe", 3242, "40398754589435345934")
|
---|
| 544 | # manifest1.addFile("dir/file2.zip", 45645, "347893245873456987")
|
---|
| 545 | # manifest1.addFile("dir/file3.txt", 123, "3432434534534534")
|
---|
[36] | 546 |
|
---|
[37] | 547 | # with open("manifest1", "wt") as f:
|
---|
| 548 | # manifest1.writeInto(f)
|
---|
[36] | 549 |
|
---|
[37] | 550 | # manifest2 = Manifest()
|
---|
| 551 | # manifest2.addFile("file1.exe", 4353, "390734659834756349876")
|
---|
| 552 | # manifest2.addFile("dir/file2.zip", 45645, "347893245873456987")
|
---|
| 553 | # manifest2.addFile("dir/file4.log", 2390, "56546546546546")
|
---|
[36] | 554 |
|
---|
[37] | 555 | # with open("manifest2", "wt") as f:
|
---|
| 556 | # manifest2.writeInto(f)
|
---|
[36] | 557 |
|
---|
[37] | 558 | # manifest1 = Manifest()
|
---|
| 559 | # with open("manifest1", "rt") as f:
|
---|
| 560 | # manifest1.readFrom(f)
|
---|
[36] | 561 |
|
---|
[37] | 562 | # manifest2 = Manifest()
|
---|
| 563 | # with open("manifest2", "rt") as f:
|
---|
| 564 | # manifest2.readFrom(f)
|
---|
[36] | 565 |
|
---|
[37] | 566 | # (modifiedAndNew, removed) = manifest1.compare(manifest2)
|
---|
[36] | 567 |
|
---|
[37] | 568 | # for (path, size, sum) in modifiedAndNew:
|
---|
| 569 | # print "modified or new:", path, size, sum
|
---|
[36] | 570 |
|
---|
[37] | 571 | # for path in removed:
|
---|
| 572 | # print "removed:", path
|
---|
[36] | 573 |
|
---|
| 574 | #------------------------------------------------------------------------------
|
---|