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connection.py
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connection.py
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from PyQt4.Qt import *
import traceback
class ClientConnection (QObject):
dataRecieved=pyqtSignal(QStringList)
disconnected=pyqtSignal()
messageFileChangedRecieved=pyqtSignal(QStringList)
messageFileDeletedRecieved=pyqtSignal(QStringList)
requestFileChangedRecieved=pyqtSignal(QStringList)
dataFileChangedRecieved=pyqtSignal(QStringList)
messageDirectoryCreatedRecieved=pyqtSignal(QStringList)
messageDirectoryDeletedRecieved=pyqtSignal(QStringList)
def __init__(self,socket):
QObject.__init__(self)
self.socket = socket;
print "Alert: Connected to ", str(self.socket.peerAddress())," ",self.socket.peerPort()
self.socket.readyRead.connect(self.readIncoming)
self.dataRecieved.connect(self.processHeader)
#self.messageFileChangedRecieved.connect(self.processMFileChangedRecieved)
#self.requestFileChangedRecieved.connect(self.processRFileChangedRecieved)
#self.dataFileChangedRecieved.connect(self.processDFileChangedRecieved)
self.socket.disconnected.connect(self.emitDisconnected)
def emitDisconnected(self):
self.disconnected.emit()
def readIncoming(self):
#print "Alert: Data Avaiable for Reading"
readStream=QDataStream(self.socket)
if (self.socket.bytesAvailable() < 2):
return
size=readStream.readUInt16()
for i in range(0,10):
if(self.socket.bytesAvailable() >= size):
#print 'Alert: got it'
break
else:
#print "Alert: Waiting for data. Available=", self.socket.bytesAvailable(), "< should be", size
self.socket.waitForReadyRead()
data = readStream.readQStringList()
self.dataRecieved.emit(data)
def processHeader(self, dataPacket):
"""
Reads first QStringList (header) from the dataPacket and fires appropriate signal depending
upon the value of the header
"""
header = dataPacket.takeFirst()
print "Alert: Just Recieved : ", header
if (header == QString("m.FILE.CHANGED")):
self.messageFileChangedRecieved.emit(dataPacket)
#LATER: this should be connected to a slot which locks the file allowing no further get requests.
elif(header == QString("m.FILE.DELETED")):
self.messageFileDeletedRecieved.emit(dataPacket)
elif (header == QString("r.FILE.CHANGED")):
self.requestFileChangedRecieved.emit(dataPacket)
elif (header == QString("d.FILE.CHANGED")):
self.dataFileChangedRecieved.emit(dataPacket)
elif (header == QString("m.DIR.CREATED")):
self.messageDirectoryCreatedRecieved.emit(dataPacket)
elif (header == QString("m.DIR.DELETED")):
self.messageDirectoryDeletedRecieved.emit(dataPacket)
else:
pass
def writeOutgoing(self,data):
print "Alert: Sending :", data.first()
byteArray=QByteArray()
writeStream=QDataStream (byteArray, QIODevice.WriteOnly)
writeStream.setVersion(QDataStream.Qt_4_0)
writeStream.writeUInt16(0)
writeStream.writeQStringList(data)
writeStream.device().seek(0)
writeStream.writeUInt16(byteArray.size() - 2)
print "Alert: writing to socket :", byteArray.size() ," bytes"
self.socket.write(byteArray)
self.socket.flush()
class FssDirectoryManager(QObject):
fileModified=pyqtSignal(QString)
fileDeleted=pyqtSignal(QString)
directoryCreated=pyqtSignal(QString)
directoryDeleted=pyqtSignal(QString)
hashValue = QCryptographicHash(QCryptographicHash.Md5)
fileBuffer={}
def cacheRecursively(self, directory):
"""
Recursively caches the whole diretory tree.
"""
dirListing = list(QDir(directory).entryInfoList())
dirListing.pop(0)
dirListing.pop(0)
for i in dirListing:
self.watcher.addPath(i.absoluteFilePath())
#self.watcher.addPath(self.directory.relativeFilePath(i.absoluteFilePath()))
if (i.isDir()):
self.cacheRecursively(i.absoluteFilePath())
def uncacheRecursively(self, directory):
"""
recursively removes the files and sub-directories of the passed path from watcher
"""
dirListing = list(QDir(directory).entryInfoList())
dirListing.pop(0)
dirListing.pop(0)
for i in dirListing:
self.watcher.removePath(i.absoluteFilePath())
if (i.isDir()):
self.uncacheRecursively(i.absolutePath())
def removeRecursively(self, directory):
"""
Recursively deletes the files and sub-directories of passed directory
"""
dirListing = list(QDir(directory).entryInfoList())
dirListing.pop(0)
dirListing.pop(0)
for i in dirListing:
self.watcher.removePath(i.absoluteFilePath())
if (i.isFile()):
self.unLoadFile(self.directory.relativeFilePath(i.absoluteFilePath()))
self.directory.remove(i.absoluteFilePath())
if (i.isDir()):
self.removeRecursively(i.absoluteFilePath())
self.directory.rmdir(QDir(directory).absolutePath())
def relativeDirectoryPath(self, path):
return path.split(self.directory.absolutePath() + '/',QString.SkipEmptyParts).takeFirst()
def __init__(self, directory):
QObject.__init__(self)
self.directory= QDir(directory)
self.watcher=QFileSystemWatcher()
self.watcher.addPath(self.directory.absolutePath())
self.cacheRecursively(self.directory.absolutePath())
"""Connections"""
self.watcher.directoryChanged.connect(self.processDirChanged)
self.watcher.fileChanged.connect(self.processFileChanged)
"""printing the initial watch queue"""
for i in list(self.watcher.directories()):
print i
for i in list(self.watcher.files()):
print i
def processDirChanged(self, changed):
changedDir = QDir(changed)
print "Monitored directory changed: ", changed
if(changedDir.exists() == False):
"""If the directory has been deleted then emit and return, no fooling around"""
#self.uncacheRecursively(changed)
self.directoryDeleted.emit(self.relativeDirectoryPath(changed))
self.watcher.removePath(changed)
if(changed in self.watcher.directories()):
print"removePath failed"
print "Emitted Directory Deleted: ", self.relativeDirectoryPath(changed)
return
newlist = set()
eil = changedDir.entryInfoList()
eil.pop(0)
eil.pop(0)
for i in eil:
newlist.add(i.absoluteFilePath())
oldlist = set(self.watcher.files()).union(set(self.watcher.directories()))
newFiles = newlist - oldlist
for i in newFiles:
self.watcher.addPath(i)
print "Appending to watch list: ", i
if(QFileInfo(i).isFile()):
self.loadFile(self.directory.relativeFilePath(i))
self.fileModified.emit(self.directory.relativeFilePath(i))
elif(QFileInfo(i).isDir()):
self.directoryCreated.emit(self.relativeDirectoryPath(i))
print "Emitted Directory Created: ", self.relativeDirectoryPath(i)
pass
def processFileChanged(self, changed):
"""changed is a QString with Absolute File Path"""
#changedFile = QFileInfo(changed)
relFilePath=self.directory.relativeFilePath(changed)
if (self.fileExists(relFilePath)):
print "Alert: modified :", relFilePath
#fileName=QFileInfo(changed).fileName()
self.loadFile(relFilePath)
self.fileModified.emit(relFilePath)
else:
"""if the file is not there, it means it is deleted - hence the signal"""
print "Alert: Deleted", relFilePath
self.fileDeleted.emit(relFilePath)
def displayChange(self, change):
print "changed ", change
def writeRecievedModifications(self,dataPacket):
relativeFilePath=dataPacket.takeFirst()
fileData=dataPacket.takeFirst().toUtf8()
print "Alert: About to Write to file: ", relativeFilePath
f = QFile(self.directory.absolutePath() + '/' + relativeFilePath)
if(f.open(QIODevice.WriteOnly)):
print "Alert :writing Recieved Data ",relativeFilePath, fileData
f.write(QByteArray.fromBase64(fileData))
else:
print "Error: couldn't open file: ", f.fileName()
def getFileContents(self,relFilePath):
if(relFilePath not in self.fileBuffer):
print "Exception: ", relFilePath, " not in fileBuffer -> loading.."
#error checking required here.
self.loadFile(relFilePath)
print "Alert: loaded ", relFilePath
return self.fileBuffer[relFilePath][0]
def removeDeletedFile(self,relativeFilePath):
print "About to delete file: ", relativeFilePath
absoluteFilePath = self.directory.absolutePath() + '/'+ relativeFilePath
if(self.fileExists(relativeFilePath)):
self.unLoadFile(relativeFilePath)
QFile.remove(absoluteFilePath);
def unLoadFile(self,relFilePath):
"""
assumes the parameter to be relative file path,
indexing in fileBuffer is based on relative file path.
"""
if(relFilePath in self.fileBuffer):
del self.fileBuffer[relFilePath]
def loadFile(self,relFilePath):
self.unLoadFile(relFilePath)
f = QFile(self.directory.absolutePath() + '/' + relFilePath)
if(f.open(QIODevice.ReadOnly)):
fileContents=QString(f.readAll().toBase64())
self.hashValue.reset()
self.hashValue.addData(fileContents)
self.fileBuffer[relFilePath]=fileContents,QString(self.hashValue.result().toHex())
#print "fileBuffer status: \n",self.fileBuffer
#print "Alert: Loaded :", self.fileBuffer[fileName]
return True
else:
print "Error: loadFile failed -> couldn't open: ", f.fileName()
traceback.print_list(traceback.extract_stack())
return False
def getFileHash(self,relFilePath):
if(relFilePath not in self.fileBuffer):
self.loadFile(relFilePath)
return self.fileBuffer[relFilePath][1]
def fileExists(self, relFilePath):
exists = QFile.exists(self.directory.absolutePath() + '/' + relFilePath)
if (exists and relFilePath in self.fileBuffer):
return True
elif (exists):
return self.loadFile(relFilePath)
else:
return False
def createDirectory(self, dataPacket):
self.directory.mkdir(dataPacket.takeFirst())
def removeDirectory(self,dataPacket):
dirToRemove=QDir(self.directory.absolutePath() + '/' + dataPacket.takeFirst())
print "dirToRemove: ", dirToRemove.absolutePath()
if(dirToRemove.exists()):
print "Deleting directory "
self.removeRecursively(dirToRemove)
self.directory.rmdir(dirToRemove.absolutePath())
else :
print "directory did not exist"
def getPeerName(self):
return self.directory.absolutePath()