def start(self):
self._sender = self._socket.peerAddress()
stream = QDataStream(self._socket)
if (self._file_size == 0):
if (self._socket.bytesAvailable() < getsizeof(int)):
return
self._file_size = stream.readUInt32()
if (self._socket.bytesAvailable() < self._file_size):
return
self._file_name = stream.readString()
line = QByteArray()
line = self._socket.readAll()
directory = Path(Setup().get_download_dir())
if not (directory.exists() and directory.is_dir()):
directory.mkdir()
self._receiving_file = QFile(Setup().get_download_dir() +
str(self._file_name))
print(Setup().get_download_dir() + str(self._file_name))
if not (self._receiving_file.open(QIODevice.WriteOnly)):
print("can't open file")
return
self._receiving_file.write(line)
self._receiving_file.close()
self._socket.disconnectFromHost()
print("finished")
return self._receiving_file
def run(self):
# Try to connect to an incomming tcp socket using its socket descriptor
tcpSocket = QTcpSocket()
if not tcpSocket.setSocketDescriptor(self.socketDescriptor):
FreeCAD.Console.PrintError("Socket not accepted.\n")
return
# Wait for an incomming message
if not tcpSocket.waitForReadyRead(msecs=WAIT_TIME_MS):
FreeCAD.Console.PrintError("No request send.\n")
return
# Make an input data stream
instr = QDataStream(tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
# Try to read the message size
if self.blockSize == 0:
if tcpSocket.bytesAvailable() < 2:
return
self.blockSize = instr.readUInt16()
# Check message is sent complete
if tcpSocket.bytesAvailable() < self.blockSize:
return
# Read message and inform about it
instr = instr.readString()
FreeCAD.Console.PrintLog("CommandServer received> " + str(instr) +
"\n")
# Try to execute the message string and prepare a response
try:
exec(str(instr))
except Exception as e:
FreeCAD.Console.PrintError("Executing external command failed:" +
str(e) + "\n")
message = "Command failed - " + str(e)
else:
FreeCAD.Console.PrintLog("Executing external command succeded!\n")
message = COMMAND_EXECUTED_CONFIRMATION_MESSAGE
# Prepare the data block to send back and inform about it
FreeCAD.Console.PrintLog("CommandServer sending> " + message + " \n")
block = QByteArray()
outstr = QDataStream(block, QIODevice.WriteOnly)
outstr.setVersion(QDataStream.Qt_4_0)
outstr.writeUInt16(0)
outstr.writeQString(message)
outstr.device().seek(0)
outstr.writeUInt16(block.size() - 2)
# Send the block, disconnect from the socket and terminate the QThread
tcpSocket.write(block)
tcpSocket.disconnectFromHost()
tcpSocket.waitForDisconnected()
def sendClientCommand(host, port, cmd, wait_time=WAIT_TIME_MS):
# Try to connect to a host server
tcpSocket = QTcpSocket()
tcpSocket.connectToHost(host, port, QIODevice.ReadWrite)
if not tcpSocket.waitForConnected(msecs=wait_time):
return CLIENT_ERROR_NO_CONNECTION
# Prepare a command message to be sent
block = QByteArray()
outstr = QDataStream(block, QIODevice.WriteOnly)
outstr.setVersion(QDataStream.Qt_4_0)
outstr.writeUInt16(0)
outstr.writeQString(cmd)
outstr.device().seek(0)
outstr.writeUInt16(block.size() - 2)
tcpSocket.write(block)
# Try to send the message
if not tcpSocket.waitForBytesWritten(msecs=wait_time):
return CLIENT_ERROR_BLOCK_NOT_WRITTEN
# Wait for a response from the host server
if not tcpSocket.waitForReadyRead(msecs=10000):
return CLIENT_ERROR_NO_RESPONSE
# Try to read the response
instr = QDataStream(tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
blockSize = 0
if blockSize == 0:
if tcpSocket.bytesAvailable() < 2:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
blockSize = instr.readUInt16()
if tcpSocket.bytesAvailable() < blockSize:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
# Wait until the host server terminates the connection
tcpSocket.waitForDisconnected()
# Return value representing a command execution status
if instr.readString() == COMMAND_EXECUTED_CONFIRMATION_MESSAGE:
return CLIENT_COMMAND_EXECUTED
else:
return CLIENT_COMMAND_FAILED
def sendCommand(self, cmd):
# connect a Qt slot to receive and print errors
self.tcpSocket.error.connect(self.displayError)
# Try to connect to a host server
self.tcpSocket.connectToHost(self.host, self.port, QIODevice.ReadWrite)
if not self.tcpSocket.waitForConnected(msecs=WAIT_TIME_MS):
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintError(
"CommandClient.sendCommand error: " + "No connection\n")
else:
print("CommandClient.sendCommand error: No connection\n")
return CLIENT_ERROR_NO_CONNECTION
# Prepare a command message to be sent
block = QByteArray()
outstr = QDataStream(block, QIODevice.WriteOnly)
outstr.setVersion(QDataStream.Qt_4_0)
outstr.writeUInt16(0)
outstr.writeQString(cmd)
outstr.device().seek(0)
outstr.writeUInt16(block.size() - 2)
# Try to send the message
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintMessage("CommandClient sending> " + cmd +
"\n")
else:
print("CommandClient sending> " + cmd + "\n")
self.tcpSocket.write(block)
if not self.tcpSocket.waitForBytesWritten(msecs=WAIT_TIME_MS):
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintError(
"CommandClient.sendCommand error: " +
"Block not written\n")
else:
print("CommandClient.sendCommand error: Block not written\n")
return CLIENT_ERROR_BLOCK_NOT_WRITTEN
# Wait for a response from the host server
if not self.tcpSocket.waitForReadyRead(msecs=WAIT_TIME_MS):
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintError(
"CommandClient.sendCommand error: " +
"No response received.\n")
else:
print("CommandClient.sendCommand error: " +
"No response received.\n")
return CLIENT_ERROR_NO_RESPONSE
# Try to read the response
instr = QDataStream(self.tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
if self.blockSize == 0:
if self.tcpSocket.bytesAvailable() < 2:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
self.blockSize = instr.readUInt16()
if self.tcpSocket.bytesAvailable() < self.blockSize:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
response = instr.readString()
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintMessage("CommandClient received> " +
response + "\n")
else:
print("CommandClient received> " + response + "\n")
# Wait until the host server terminates the connection
self.tcpSocket.waitForDisconnected()
# Reset blockSize to prepare for sending next command
self.blockSize = 0
# Return value representing a command execution status
if response == COMMAND_EXECUTED_CONFIRMATION_MESSAGE:
return CLIENT_COMMAND_EXECUTED
else:
return CLIENT_COMMAND_FAILED
def sendClientCommand(host, port, cmd, wait_time=WAIT_TIME_MS):
"""
Method to be used for sending commands.
This method is an alternative to using `CommandClient`. It does not print any
logs, just returns a value saying how the execution went.
Args:
cmd: A str command to be executed.
host: A QtHostAddress to the `CommandServer`.
port: An int of port at which `CommandServer` is listening.
Kwargs:
wait_time: An int setting miliseconds to wait for connection or message.
Returns:
`CLIENT_COMMAND_EXECUTED` if all went great and command was executed.
`CLIENT_COMMAND_FAILED` if `cmd` execution failed.
`CLIENT_ERROR_RESPONSE_NOT_COMPLETE` if a response received was incomplete.
`CLIENT_ERROR_NO_RESPONSE` if there was no response within `WAIT_TIME_MS`.
`CLIENT_ERROR_BLOCK_NOT_WRITTEN` if communication failed during sending.
`CLIENT_ERROR_NO_CONNECTION` if no connection to a host was established.
"""
# Try to connect to a host server
tcpSocket = QTcpSocket()
tcpSocket.connectToHost(host, port, QIODevice.ReadWrite)
if not tcpSocket.waitForConnected(msecs=wait_time):
return CLIENT_ERROR_NO_CONNECTION
# Prepare a command message to be sent
block = QByteArray()
outstr = QDataStream(block, QIODevice.WriteOnly)
outstr.setVersion(QDataStream.Qt_4_0)
outstr.writeUInt16(0)
outstr.writeQString(cmd)
outstr.device().seek(0)
outstr.writeUInt16(block.size() - 2)
tcpSocket.write(block)
# Try to send the message
if not tcpSocket.waitForBytesWritten(msecs=wait_time):
return CLIENT_ERROR_BLOCK_NOT_WRITTEN
# Wait for a response from the host server
if not tcpSocket.waitForReadyRead(msecs=10000):
return CLIENT_ERROR_NO_RESPONSE
# Try to read the response
instr = QDataStream(tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
blockSize = 0
if blockSize == 0:
if tcpSocket.bytesAvailable() < 2:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
blockSize = instr.readUInt16()
if tcpSocket.bytesAvailable() < blockSize:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
# Wait until the host server terminates the connection
tcpSocket.waitForDisconnected()
# Return value representing a command execution status
if instr.readString() == COMMAND_EXECUTED_CONFIRMATION_MESSAGE:
return CLIENT_COMMAND_EXECUTED
else:
return CLIENT_COMMAND_FAILED
def sendCommand(self, cmd):
"""
Method used to send commands from client to `CommandServer`.
This method tries to connect to a specified host `CommandServer` via
`tcpSocket`. If connection was successfull, the command `cmd` is sent.
Then the response is expected. If the response is equal to
COMMAND_EXECUTED_CONFIRMATION_MESSAGE, then the execution was successfull.
The progress and result of `sendCommand` can be obtained from printed logs and
return value.
Args:
cmd: A str command to be executed.
Returns:
`CLIENT_COMMAND_EXECUTED` if all went great and command was executed.
`CLIENT_COMMAND_FAILED` if `cmd` execution failed.
`CLIENT_ERROR_RESPONSE_NOT_COMPLETE` if a response received was incomplete.
`CLIENT_ERROR_NO_RESPONSE` if there was no response within `WAIT_TIME_MS`.
`CLIENT_ERROR_BLOCK_NOT_WRITTEN` if communication failed during sending.
`CLIENT_ERROR_NO_CONNECTION` if no connection to a host was established.
"""
# connect a Qt slot to receive and print errors
self.tcpSocket.error.connect(self.displayError)
# Try to connect to a host server
self.tcpSocket.connectToHost(self.host, self.port, QIODevice.ReadWrite)
if not self.tcpSocket.waitForConnected(msecs=WAIT_TIME_MS):
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintError(
"CommandClient.sendCommand error: " + "No connection\n")
else:
print("CommandClient.sendCommand error: No connection\n")
return CLIENT_ERROR_NO_CONNECTION
# Prepare a command message to be sent
block = QByteArray()
outstr = QDataStream(block, QIODevice.WriteOnly)
outstr.setVersion(QDataStream.Qt_4_0)
outstr.writeUInt16(0)
outstr.writeQString(cmd)
outstr.device().seek(0)
outstr.writeUInt16(block.size() - 2)
# Try to send the message
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintMessage("CommandClient sending> " + cmd +
"\n")
else:
print("CommandClient sending> " + cmd + "\n")
self.tcpSocket.write(block)
if not self.tcpSocket.waitForBytesWritten(msecs=WAIT_TIME_MS):
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintError(
"CommandClient.sendCommand error: " +
"Block not written\n")
else:
print("CommandClient.sendCommand error: Block not written\n")
return CLIENT_ERROR_BLOCK_NOT_WRITTEN
# Wait for a response from the host server
if not self.tcpSocket.waitForReadyRead(msecs=WAIT_TIME_MS):
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintError(
"CommandClient.sendCommand error: " +
"No response received.\n")
else:
print("CommandClient.sendCommand error: " +
"No response received.\n")
return CLIENT_ERROR_NO_RESPONSE
# Try to read the response
instr = QDataStream(self.tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
if self.blockSize == 0:
if self.tcpSocket.bytesAvailable() < 2:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
self.blockSize = instr.readUInt16()
if self.tcpSocket.bytesAvailable() < self.blockSize:
return CLIENT_ERROR_RESPONSE_NOT_COMPLETE
response = instr.readString()
if "FreeCAD" in sys.modules:
FreeCAD.Console.PrintMessage("CommandClient received> " +
response + "\n")
else:
print("CommandClient received> " + response + "\n")
# Wait until the host server terminates the connection
self.tcpSocket.waitForDisconnected()
# Reset blockSize to prepare for sending next command
self.blockSize = 0
# Return value representing a command execution status
if response == COMMAND_EXECUTED_CONFIRMATION_MESSAGE:
return CLIENT_COMMAND_EXECUTED
else:
return CLIENT_COMMAND_FAILED
def run(self):
"""
Thread's functionality method.
The starting point for the thread. After calling start(), the newly created
thread calls this function. This function then tries to make QTcpSocket.
It waits `WAIT_TIME_MS` for an incomming message. If message is received
it checks its a whole message using blockSize sent in the first word as
an UINT16 number. If a whole message is received, the thread tries to execute
the message string and sends back an appropriate response. The response is
*Command failed - "error string"* if the execution failed, or *Commmand
executed successfully* otherwise. Then the thread is terminated.
"""
# Try to connect to an incomming tcp socket using its socket descriptor
tcpSocket = QTcpSocket()
if not tcpSocket.setSocketDescriptor(self.socketDescriptor):
FreeCAD.Console.PrintError("Socket not accepted.\n")
return
# Wait for an incomming message
if not tcpSocket.waitForReadyRead(msecs=WAIT_TIME_MS):
FreeCAD.Console.PrintError("No request send.\n")
return
# Make an input data stream
instr = QDataStream(tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
# Try to read the message size
if self.blockSize == 0:
if tcpSocket.bytesAvailable() < 2:
return
self.blockSize = instr.readUInt16()
# Check message is sent complete
if tcpSocket.bytesAvailable() < self.blockSize:
return
# Read message and inform about it
instr = instr.readString()
FreeCAD.Console.PrintLog("CommandServer received> " + str(instr) +
"\n")
# Try to execute the message string and prepare a response
try:
exec(str(instr))
except Exception as e:
FreeCAD.Console.PrintError("Executing external command failed:" +
str(e) + "\n")
message = "Command failed - " + str(e)
else:
FreeCAD.Console.PrintLog("Executing external command succeded!\n")
message = COMMAND_EXECUTED_CONFIRMATION_MESSAGE
# Prepare the data block to send back and inform about it
FreeCAD.Console.PrintLog("CommandServer sending> " + message + " \n")
block = QByteArray()
outstr = QDataStream(block, QIODevice.WriteOnly)
outstr.setVersion(QDataStream.Qt_4_0)
outstr.writeUInt16(0)
outstr.writeQString(message)
outstr.device().seek(0)
outstr.writeUInt16(block.size() - 2)
# Send the block, disconnect from the socket and terminate the QThread
tcpSocket.write(block)
tcpSocket.disconnectFromHost()
tcpSocket.waitForDisconnected()
