755 lines
34 KiB
Python
755 lines
34 KiB
Python
#!/usr/bin/env python3
|
|
|
|
from typing import Union
|
|
from pathlib import Path
|
|
from msgpack import loads, dumps
|
|
import socket
|
|
import threading
|
|
import time
|
|
import pickle
|
|
import re
|
|
import networkx as nx
|
|
|
|
from queue import Queue, Empty
|
|
from base64 import b64encode, b64decode
|
|
from PySide6 import QtCore
|
|
from uuid import uuid4
|
|
from hashlib import sha3_512
|
|
from cryptography.hazmat.primitives import hashes
|
|
from cryptography.hazmat.primitives.asymmetric import ec
|
|
from cryptography.hazmat.primitives.kdf.hkdf import HKDF
|
|
from cryptography.hazmat.primitives.serialization import Encoding
|
|
from cryptography.hazmat.primitives.serialization import PublicFormat
|
|
from cryptography.hazmat.primitives.serialization import load_der_public_key
|
|
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
|
|
from cryptography.exceptions import InvalidTag
|
|
|
|
# All functions use this to run. Checks if the program is closing.
|
|
closeSoftwareLock = threading.Lock()
|
|
closeSoftware = False
|
|
|
|
|
|
# Has to be QObject for Signals to work.
|
|
class CommunicationsHandler(QtCore.QObject):
|
|
"""
|
|
This class handles communication with a LinkScope server.
|
|
|
|
Convention for variables changes here - all variables that have to do with network communications
|
|
are in snake_case. This makes them easy to differentiate from others, if it is important to track
|
|
what came from a network and what did not. This is also the case server-side.
|
|
"""
|
|
|
|
connected_to_server_listener = QtCore.Signal(str)
|
|
receive_question_answer = QtCore.Signal(dict)
|
|
receive_chat_message = QtCore.Signal(str)
|
|
receive_resolutions_signal = QtCore.Signal(dict)
|
|
receive_completed_resolution_result_signal = QtCore.Signal(str, list)
|
|
receive_completed_resolution_string_result_signal = QtCore.Signal(str, str)
|
|
receive_document_summary_signal = QtCore.Signal(str, str)
|
|
remove_server_resolution_from_running_signal = QtCore.Signal(str)
|
|
receive_projects_list_signal = QtCore.Signal(list)
|
|
receive_project_canvases_list_signal = QtCore.Signal(list)
|
|
open_project_signal = QtCore.Signal(str)
|
|
close_project_signal = QtCore.Signal()
|
|
open_project_canvas_signal = QtCore.Signal(str)
|
|
close_project_canvas_signal = QtCore.Signal(str)
|
|
receive_project_database_update = QtCore.Signal(dict, bool)
|
|
receive_project_canvas_update = QtCore.Signal(str, str)
|
|
receive_sync_database = QtCore.Signal(nx.DiGraph)
|
|
status_message_signal = QtCore.Signal(str, bool)
|
|
receive_project_file_list = QtCore.Signal(list)
|
|
file_upload_finished_signal = QtCore.Signal(str)
|
|
file_upload_abort_signal = QtCore.Signal(str)
|
|
receive_sync_canvas_signal = QtCore.Signal(str, nx.DiGraph)
|
|
|
|
def __init__(self, mainWindow):
|
|
|
|
super().__init__()
|
|
|
|
self.inbox = Queue()
|
|
|
|
self.mainWindow = mainWindow
|
|
self.downloadingFiles = {}
|
|
self.uploadingFiles = {}
|
|
|
|
self.connected_to_server_listener.connect(self.mainWindow.connectedToServerListener)
|
|
self.receive_question_answer.connect(self.mainWindow.questionAnswerListener)
|
|
self.receive_chat_message.connect(self.mainWindow.receiveChatMessage)
|
|
self.receive_resolutions_signal.connect(self.mainWindow.addResolutionsFromServerListener)
|
|
self.receive_completed_resolution_result_signal.connect(self.mainWindow.resolutionSignalListener)
|
|
self.receive_completed_resolution_string_result_signal.connect(self.mainWindow.resolutionSignalListener)
|
|
self.receive_document_summary_signal.connect(self.mainWindow.receiveSummaryOfDocument)
|
|
self.remove_server_resolution_from_running_signal.connect(self.mainWindow.cleanServerResolutionListener)
|
|
self.receive_projects_list_signal.connect(self.mainWindow.receiveProjectsListListener)
|
|
self.receive_project_canvases_list_signal.connect(self.mainWindow.receiveProjectCanvasesListListener)
|
|
self.open_project_signal.connect(self.mainWindow.openServerProjectListener)
|
|
self.open_project_canvas_signal.connect(self.mainWindow.openServerCanvasListener)
|
|
self.close_project_signal.connect(self.mainWindow.closeCurrentServerProject)
|
|
self.close_project_canvas_signal.connect(self.mainWindow.closeServerCanvasListener)
|
|
self.receive_project_database_update.connect(self.mainWindow.receiveServerDatabaseUpdate)
|
|
self.receive_project_canvas_update.connect(self.mainWindow.receiveServerCanvasUpdate)
|
|
self.receive_sync_database.connect(self.mainWindow.receiveSyncDatabaseListener)
|
|
self.receive_project_file_list.connect(self.mainWindow.receiveFileListListener)
|
|
self.file_upload_finished_signal.connect(self.mainWindow.fileUploadFinishedListener)
|
|
self.file_upload_abort_signal.connect(self.mainWindow.receiveAbortUploadOfFiles)
|
|
self.receive_sync_canvas_signal.connect(self.mainWindow.receiveSyncCanvasListener)
|
|
self.status_message_signal.connect(self.mainWindow.statusMessageListener)
|
|
|
|
self.cipher = None
|
|
self.threadInc = None
|
|
self.threadInb = None
|
|
self.sock = None
|
|
|
|
def beginCommunications(self, password: str, server: str, port: int = 3777):
|
|
global closeSoftwareLock
|
|
global closeSoftware
|
|
with closeSoftwareLock: # Not strictly necessary, but might as well just in case.
|
|
closeSoftware = False
|
|
try:
|
|
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
|
|
self.sock.connect((server, port))
|
|
|
|
private_key = ec.generate_private_key(ec.SECP521R1())
|
|
self.sock.send(private_key.public_key().public_bytes(
|
|
Encoding.DER,
|
|
format=PublicFormat.SubjectPublicKeyInfo))
|
|
peer_public = load_der_public_key(self.sock.recv(5120))
|
|
shared_key = private_key.exchange(ec.ECDH(), peer_public)
|
|
derived_key = HKDF(
|
|
algorithm=hashes.SHA3_256(),
|
|
length=32,
|
|
salt=None,
|
|
info=b'Handshake'
|
|
).derive(shared_key)
|
|
iv = sha3_512(derived_key).digest()[:16]
|
|
self.cipher = Cipher(algorithms.AES(derived_key), modes.CBC(iv))
|
|
encryptor = self.cipher.encryptor()
|
|
decrypter = self.cipher.decryptor()
|
|
|
|
passPad = 16 - (len(password) % 16)
|
|
passMessage = encryptor.update(password.encode() + b"*" * passPad) + encryptor.finalize()
|
|
self.sock.send(passMessage)
|
|
messageReceived = decrypter.update(self.sock.recv(5120)) + decrypter.finalize()
|
|
if messageReceived == b"Passphrase is OK":
|
|
self.threadInc = threading.Thread(target=self.scanIncoming)
|
|
self.threadInc.setDaemon(True)
|
|
self.threadInc.start()
|
|
|
|
self.threadInb = threading.Thread(target=self.scanInbox)
|
|
self.threadInb.setDaemon(True)
|
|
self.threadInb.start()
|
|
|
|
return True
|
|
elif messageReceived == b"Wrong Passphrase":
|
|
raise ValueError('Incorrect Passphrase')
|
|
|
|
self.mainWindow.MESSAGEHANDLER.warning("Server did not reply in the expected manner to "
|
|
"password authentication.", popUp=True)
|
|
except Exception as exception:
|
|
self.mainWindow.MESSAGEHANDLER.error("Did not connect: " + str(exception))
|
|
|
|
try:
|
|
if self.sock is not None:
|
|
self.sock.shutdown(socket.SHUT_RDWR)
|
|
self.sock.close()
|
|
self.sock = None
|
|
except OSError:
|
|
# This would typically occur if the socket is already closed.
|
|
self.mainWindow.MESSAGEHANDLER.info('Tried to close socket that was already closed.')
|
|
|
|
return False
|
|
|
|
def isConnected(self):
|
|
"""
|
|
Check if socket is in a working state.
|
|
"""
|
|
if self.sock is not None and self.sock.fileno() != -1:
|
|
return True
|
|
return False
|
|
|
|
def close(self):
|
|
global closeSoftwareLock
|
|
global closeSoftware
|
|
with closeSoftwareLock:
|
|
closeSoftware = True
|
|
self.closeSocket()
|
|
for fileName in self.downloadingFiles:
|
|
# Close open file handlers
|
|
self.downloadingFiles[fileName].close()
|
|
# saveDir = Path(fileName)
|
|
saveDir = Path(self.mainWindow.SETTINGS.value("Project/FilesDir")) / fileName
|
|
if saveDir.exists():
|
|
# Delete partly downloaded files.
|
|
saveDir.unlink(missing_ok=True)
|
|
self.downloadingFiles = {}
|
|
self.uploadingFiles = {}
|
|
|
|
def encryptTransmission(self, bytesObject):
|
|
encryptor = self.cipher.encryptor()
|
|
# No need to check for overflows or negative pads - transmitMessage practically ensures that the data
|
|
# sent will always be less than or equal to 1280 bytes.
|
|
padNeeded = 1280 - len(bytesObject)
|
|
message = encryptor.update(b'a' * padNeeded + bytesObject) + encryptor.finalize()
|
|
return message
|
|
|
|
def decryptTransmission(self, bytesObject):
|
|
decrypter = self.cipher.decryptor()
|
|
try:
|
|
message = decrypter.update(bytesObject) + decrypter.finalize()
|
|
return message
|
|
except InvalidTag:
|
|
# If the ciphertext cannot be decrypted to a valid message, return None.
|
|
return None
|
|
|
|
def transmitMessage(self, messageJson: dict, showErrorOnBrokenPipe: bool = True):
|
|
# Note that Base64 encoded data is about 4/3 times the size of the original.
|
|
# 768 * 4/3 = 1024
|
|
print('Sending message:', messageJson)
|
|
argEncoded = b64encode(pickle.dumps(messageJson))
|
|
largeMessageUUID = str(uuid4())
|
|
try:
|
|
for data in range(0, len(argEncoded), 768):
|
|
partArg = argEncoded[data:data + 768]
|
|
done = data + 768 >= len(argEncoded)
|
|
messageJson = {"uuid": largeMessageUUID,
|
|
"message": partArg.decode(),
|
|
"done": done}
|
|
self.sock.send(self.encryptTransmission(dumps(messageJson)))
|
|
except BrokenPipeError:
|
|
if showErrorOnBrokenPipe:
|
|
self.mainWindow.MESSAGEHANDLER.error("Disconnected from server!", popUp=True, exc_info=False)
|
|
self.mainWindow.disconnectFromServer()
|
|
|
|
def closeSocket(self):
|
|
"""
|
|
Called by the close function in this class when communications with the server are to be ended.
|
|
:return:
|
|
"""
|
|
try:
|
|
self.transmitMessage({"Operation": "Close Socket", "Arguments": {}}, showErrorOnBrokenPipe=False)
|
|
except OSError:
|
|
# Typically this is due to bad file descriptor, i.e. server is closed.
|
|
pass
|
|
except AttributeError:
|
|
# This happens if no connection was established while the software was running
|
|
pass
|
|
finally:
|
|
try:
|
|
if self.sock is not None:
|
|
self.sock.shutdown(socket.SHUT_RDWR)
|
|
self.sock.close()
|
|
self.sock = None
|
|
except OSError:
|
|
# This would typically occur if the socket is already closed.
|
|
pass
|
|
|
|
def scanIncoming(self):
|
|
"""
|
|
This function listens for incoming data, and puts it in the queue if
|
|
it exists.
|
|
"""
|
|
preInbox = {}
|
|
while True:
|
|
try:
|
|
receivedInfo = self.sock.recv(5120)
|
|
if receivedInfo == b'':
|
|
# Socket closed.
|
|
break
|
|
for message in range(0, len(receivedInfo), 1280):
|
|
decryptedInfo = self.decryptTransmission(receivedInfo[message:message + 1280])
|
|
if decryptedInfo is None:
|
|
self.mainWindow.MESSAGEHANDLER.warning("Invalid message received from server.")
|
|
continue
|
|
receivedMessage = loads(re.sub(b'^a*', b'', decryptedInfo, count=1))
|
|
messageID = receivedMessage.get("uuid")
|
|
if messageID in preInbox:
|
|
preInbox[messageID]["message"] += receivedMessage.get("message")
|
|
else:
|
|
preInbox[messageID] = receivedMessage
|
|
if receivedMessage.get("done"):
|
|
preInbox[messageID]["message"] = pickle.loads(b64decode(preInbox[messageID]["message"]))
|
|
self.inbox.put(preInbox.pop(messageID).get("message"))
|
|
|
|
except socket.error as socketError:
|
|
self.mainWindow.MESSAGEHANDLER.error('Socket Error: ' + str(socketError))
|
|
# If something happens, wait 2 seconds then try again.
|
|
closeSoftwareLock.acquire()
|
|
if not closeSoftware:
|
|
closeSoftwareLock.release()
|
|
time.sleep(2)
|
|
else:
|
|
closeSoftwareLock.release()
|
|
break
|
|
except ValueError:
|
|
# E.g.: Unpack failed: incomplete input
|
|
pass
|
|
except pickle.UnpicklingError:
|
|
# If something went wrong with one of the packets, ignore.
|
|
# User can re-sync the database if needed.
|
|
# This rarely occurs in normal operation.
|
|
pass
|
|
except ModuleNotFoundError:
|
|
# Missing module to unpickle message.
|
|
pass
|
|
|
|
def askServerForResolutions(self):
|
|
message = {"Operation": "Get Server Resolutions",
|
|
"Arguments": {}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveResolutions(self, server_resolutions):
|
|
self.receive_resolutions_signal.emit(server_resolutions)
|
|
|
|
def runRemoteResolution(self, resolution_name: str, resolution_entities: list, resolution_parameters: dict,
|
|
resolution_uid: str):
|
|
message = {'Operation': 'Run Resolution',
|
|
'Arguments': {
|
|
'resolution_name': resolution_name,
|
|
'resolution_entities': resolution_entities,
|
|
'resolution_parameters': resolution_parameters,
|
|
'resolution_uid': resolution_uid
|
|
}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveResolutionResult(self, resolution_name: str, resolution_result: Union[list, str], resolution_uid: str):
|
|
if isinstance(resolution_result, str):
|
|
self.receive_completed_resolution_string_result_signal.emit(resolution_name, resolution_result)
|
|
else:
|
|
self.receive_completed_resolution_result_signal.emit(resolution_name, resolution_result)
|
|
self.remove_server_resolution_from_running_signal.emit(resolution_uid)
|
|
|
|
def abortResolution(self, resolution_name: str, resolution_uid: str):
|
|
message = {'Operation': 'Abort Resolution',
|
|
'Arguments': {
|
|
'resolution_name': resolution_name,
|
|
'resolution_uid': resolution_uid
|
|
}}
|
|
self.transmitMessage(message)
|
|
|
|
def askProjectsList(self):
|
|
message = {'Operation': 'Get Projects List',
|
|
'Arguments': {}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveProjectsList(self, projects: list):
|
|
self.receive_projects_list_signal.emit(projects)
|
|
|
|
def createProject(self, projectName: str, projectPassword: str):
|
|
if self.isConnected():
|
|
message = {'Operation': 'Create Project',
|
|
'Arguments': {'project_name': projectName, 'password': projectPassword}}
|
|
self.transmitMessage(message)
|
|
|
|
def openProject(self, project_name: str, projectPassword: str):
|
|
if self.isConnected():
|
|
message = {'Operation': 'Open Project',
|
|
'Arguments': {'project_name': project_name, 'password': projectPassword}}
|
|
self.transmitMessage(message)
|
|
|
|
def closeProject(self, project_name: str):
|
|
if self.isConnected():
|
|
message = {'Operation': 'Close Project',
|
|
'Arguments': {'project_name': project_name}}
|
|
self.transmitMessage(message)
|
|
|
|
def askProjectCanvasesList(self, project_name: str):
|
|
if self.isConnected():
|
|
message = {'Operation': 'List Synced Canvases',
|
|
'Arguments': {'project_name': project_name}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveProjectCanvasesList(self, canvases: list):
|
|
self.receive_project_canvases_list_signal.emit(canvases)
|
|
|
|
def askQuestion(self, project_name: str, question: str, reader_value: int, retriever_value: int, answer_count: int):
|
|
if self.isConnected():
|
|
message = {"Operation": "Ask Question",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'question': question[:256],
|
|
'reader_value': reader_value,
|
|
'retriever_value': retriever_value,
|
|
'answer_count': answer_count}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveQuestionAnswer(self, answer: list):
|
|
self.receive_question_answer.emit(answer)
|
|
|
|
def receiveTextMessage(self, chat_message: str):
|
|
self.receive_chat_message.emit(chat_message)
|
|
|
|
def sendTextMessage(self, project_name: str, chat_message: str):
|
|
if self.isConnected():
|
|
message = {"Operation": "Chat",
|
|
"Arguments": {
|
|
"project_name": project_name,
|
|
"chat_message": chat_message[:1024]}}
|
|
self.transmitMessage(message)
|
|
|
|
def syncDatabase(self, project_name: str, client_project_graph: nx.DiGraph):
|
|
message = {'Operation': 'Sync Database',
|
|
'Arguments': {
|
|
'project_name': project_name,
|
|
'client_project_graph': client_project_graph
|
|
}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveSyncDatabase(self, database: nx.DiGraph):
|
|
self.receive_sync_database.emit(database)
|
|
|
|
def askServerForFileList(self, project_name: str):
|
|
message = {"Operation": "Get File List",
|
|
"Arguments": {'project_name': project_name}}
|
|
self.transmitMessage(message)
|
|
|
|
def syncCanvasSend(self, project_name: str, canvas_name: str, canvas_graph: nx.DiGraph):
|
|
if self.isConnected():
|
|
message = {'Operation': "Sync Canvas",
|
|
'Arguments': {
|
|
'project_name': project_name,
|
|
'canvas_name': canvas_name,
|
|
"canvas_graph": canvas_graph}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveSyncCanvas(self, canvas_name: str, canvas_graph: nx.DiGraph):
|
|
self.receive_sync_canvas_signal.emit(canvas_name, canvas_graph)
|
|
|
|
def closeCanvas(self, project_name: str, canvas_name: str):
|
|
if self.isConnected():
|
|
message = {'Operation': 'Close Canvas',
|
|
'Arguments': {'project_name': project_name,
|
|
'canvas_name': canvas_name}}
|
|
self.transmitMessage(message)
|
|
|
|
# Items are sent both from the database and from the canvas.
|
|
# Items are added to the database from the canvas, but items can be
|
|
# removed from the canvas without removing them from the database.
|
|
# Furthermore, one might want to add items to the the database, but not
|
|
# to a particular canvas.
|
|
# Being verbose is better than prematurely optimizing for a few kbps of
|
|
# network traffic.
|
|
def receiveDatabaseUpdateEvent(self, entity_json: dict, add: bool):
|
|
self.receive_project_database_update.emit(entity_json, add)
|
|
|
|
def sendDatabaseUpdateEvent(self, project_name: str, entity_json: dict, add: bool):
|
|
message = {"Operation": "Update Project Entities",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
"entity_json": entity_json,
|
|
"add": add}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveCanvasUpdateEvent(self, canvas_name: str, entity_or_link_uid: str):
|
|
self.receive_project_canvas_update.emit(canvas_name, entity_or_link_uid)
|
|
|
|
def sendCanvasUpdateEvent(self, project_name: str, canvas_name: str, entity_or_link_uid: Union[str, tuple]):
|
|
message = {"Operation": "Update Canvas Entities",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
"canvas_name": canvas_name,
|
|
"entity_or_link_uid": entity_or_link_uid}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveFileList(self, file_list: list):
|
|
self.receive_project_file_list.emit(file_list)
|
|
|
|
def sendFile(self, project_name: str, file_name: str, filePath: Path):
|
|
"""
|
|
Starts a thread, calling sendFileHelper to send the file specified.
|
|
|
|
:param project_name:
|
|
:param file_name:
|
|
:param filePath:
|
|
:return:
|
|
"""
|
|
sendHelperThread = threading.Thread(target=self.sendFileHelper, args=(project_name, file_name, filePath))
|
|
sendHelperThread.setDaemon(True)
|
|
self.uploadingFiles[file_name] = sendHelperThread
|
|
sendHelperThread.start()
|
|
|
|
def sendFileHelper(self, project_name: str, file_name: str, filePath: Path):
|
|
"""
|
|
Sends file in chunks to avoid loading the entire thing in memory.
|
|
|
|
:param project_name:
|
|
:param file_name:
|
|
:param filePath:
|
|
:return:
|
|
"""
|
|
if not filePath.exists() or not filePath.is_file():
|
|
return
|
|
fileHandler = open(filePath, 'rb')
|
|
print('Sending file:', filePath)
|
|
|
|
currThread = threading.currentThread()
|
|
while getattr(currThread, "continue_running", True):
|
|
filePart = fileHandler.read(512)
|
|
if not filePart:
|
|
messageJson = {"Operation": "File Upload Done",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name
|
|
}}
|
|
self.transmitMessage(messageJson)
|
|
break
|
|
messageJson = {"Operation": "File Upload",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name,
|
|
'file_contents': filePart
|
|
}}
|
|
self.transmitMessage(messageJson)
|
|
fileHandler.close()
|
|
|
|
def sendFileAbort(self, project_name: str, file_name: str):
|
|
try:
|
|
uploadToAbort = self.uploadingFiles.pop(file_name)
|
|
uploadToAbort.continue_running = False
|
|
messageJson = {"Operation": "File Upload Abort",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name
|
|
}}
|
|
self.transmitMessage(messageJson)
|
|
except KeyError:
|
|
pass
|
|
|
|
def scanInbox(self):
|
|
"""
|
|
This function checks if there is anything in the inbox, and if
|
|
there is, calls the appropriate functions.
|
|
"""
|
|
while True:
|
|
try:
|
|
message = self.inbox.get(timeout=0.1)
|
|
except Empty:
|
|
with closeSoftwareLock:
|
|
if not closeSoftware:
|
|
time.sleep(0.1)
|
|
continue
|
|
else:
|
|
return
|
|
print('Message To handle:', message) # TODO Make this logging.
|
|
operation = message['Operation']
|
|
arguments = message['Arguments']
|
|
if operation == 'Get Server Resolutions':
|
|
self.receiveResolutions(**arguments)
|
|
elif operation == 'Get Projects List':
|
|
self.receiveProjectsList(**arguments)
|
|
elif operation == 'Status Message':
|
|
self.handleStatusMessage(**arguments)
|
|
elif operation == 'List Synced Canvases':
|
|
self.receiveProjectCanvasesList(**arguments)
|
|
elif operation == 'Resolution Result':
|
|
self.receiveResolutionResult(**arguments)
|
|
elif operation == "Chat":
|
|
self.receiveTextMessage(**arguments)
|
|
elif operation == "Sync Database":
|
|
self.receiveSyncDatabase(**arguments)
|
|
elif operation == "Sync Canvas":
|
|
self.receiveSyncCanvas(**arguments)
|
|
elif operation == "Answer Question":
|
|
self.receiveQuestionAnswer(**arguments)
|
|
elif operation == "Update Project Entities":
|
|
self.receiveDatabaseUpdateEvent(**arguments)
|
|
elif operation == "Update Canvas Entities":
|
|
self.receiveCanvasUpdateEvent(**arguments)
|
|
elif operation == "File List":
|
|
self.receiveFileList(**arguments)
|
|
elif operation == "File Download":
|
|
self.receiveFileListener(**arguments)
|
|
elif operation == "Get File Summary":
|
|
self.receiveFileSummaryListener(**arguments)
|
|
elif operation == "File Upload Abort":
|
|
self.receiveFileUploadAbort(**arguments)
|
|
elif operation == "Delete File":
|
|
pass
|
|
else:
|
|
self.mainWindow.MESSAGEHANDLER.warning('Unhandled message: ' + str(message) +
|
|
' On Operation: ' + str(operation))
|
|
|
|
def handleStatusMessage(self, operation: str, message: str, status_code: int):
|
|
"""
|
|
Operations that are completely server-side, or do not conform to the query - response model,
|
|
send status messages to inform the client of what is going on.
|
|
|
|
Status codes follow the same pattern as the ones in HTTP:
|
|
200 - Operation Successful.
|
|
404 - A requested resource was not found
|
|
403 - Access to the requested resource is forbidden
|
|
500 - Server could not adequately handle the request.
|
|
:param operation:
|
|
:param message:
|
|
:param status_code:
|
|
:return:
|
|
"""
|
|
if status_code != 200:
|
|
self.status_message_signal.emit('Operation ' + operation + ' failed with status code ' +
|
|
str(status_code) + ': ' + message, True)
|
|
else:
|
|
if operation == 'Create Project':
|
|
# No need to do anything here. Creating a new project also opens it.
|
|
pass
|
|
elif operation == 'Open Project':
|
|
projectName = message.split(': ', 1)[1]
|
|
self.open_project_signal.emit(projectName)
|
|
# Show the user that the server is doing something.
|
|
elif operation == 'Opening Project':
|
|
self.status_message_signal.emit(message, True)
|
|
elif operation == 'Close Project':
|
|
self.close_project_signal.emit()
|
|
elif operation == 'Create Canvas':
|
|
# No need to do anything here. Creating a new canvas also opens it.
|
|
pass
|
|
elif operation == 'Open Canvas':
|
|
canvas_name = message.split(': ', 1)[1]
|
|
self.open_project_canvas_signal.emit(canvas_name)
|
|
elif operation == 'Close Canvas':
|
|
canvas_name = message.split(': ', 1)[1]
|
|
self.close_project_canvas_signal.emit(canvas_name)
|
|
elif operation == 'Connect To Server':
|
|
server_name = message.split(': ', 1)[1]
|
|
self.connected_to_server_listener.emit(server_name)
|
|
elif operation == 'File Upload':
|
|
file_name = message.split(': ', 1)[1]
|
|
self.file_upload_finished_signal.emit(file_name)
|
|
elif operation == 'File Download Done':
|
|
file_name = message.split(': ', 1)[1]
|
|
self.receiveFileDoneListener(file_name)
|
|
elif operation == 'Abort Resolution':
|
|
# Remove resolution from resolutions list.
|
|
resolution_uid = message.split(': ', 1)[1]
|
|
self.remove_server_resolution_from_running_signal.emit(resolution_uid)
|
|
elif operation == 'Delete File':
|
|
# Remove file from uploaded files list.
|
|
pass # TODO
|
|
elif operation == 'File Upload Abort':
|
|
file_name = message.split(': ', 1)[1]
|
|
# Remove file from uploading files list.
|
|
self.file_upload_abort_signal.emit(file_name)
|
|
else:
|
|
self.mainWindow.MESSAGEHANDLER.warning('Unhandled status message: ' + message +
|
|
' Code: ' + str(status_code) +
|
|
' On Operation: ' + str(operation))
|
|
|
|
def receiveFile(self, project_name: str, file_name: str):
|
|
# Do not download files already being downloaded.
|
|
if self.downloadingFiles.get(file_name) is None:
|
|
saveDir = Path(self.mainWindow.SETTINGS.value("Project/FilesDir")) / file_name
|
|
fileHandler = open(saveDir, "wb")
|
|
self.downloadingFiles[file_name] = fileHandler
|
|
|
|
message = {'Operation': 'Download File',
|
|
'Arguments': {
|
|
'project_name': project_name,
|
|
'file_name': file_name
|
|
}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveFileListener(self, file_name: str, file_contents: bytes):
|
|
try:
|
|
fileHandler = self.downloadingFiles.get(file_name)
|
|
fileHandler.write(file_contents)
|
|
except Exception:
|
|
# In case the file is deleted in the middle of writing, or anything else going wrong.
|
|
self.mainWindow.MESSAGEHANDLER.warning('Received data for file: ' + file_name +
|
|
' but no valid file handler exists for this file.')
|
|
|
|
def receiveFileDoneListener(self, file_name: str):
|
|
fileHandler = self.downloadingFiles.pop(file_name)
|
|
if fileHandler is None:
|
|
self.mainWindow.MESSAGEHANDLER.warning('Received file: ' + file_name +
|
|
' but no file handler exists for this file.')
|
|
return
|
|
|
|
fileHandler.close()
|
|
self.status_message_signal.emit('Finished downloading file from server: ' + file_name, False)
|
|
|
|
def receiveFileAbort(self, project_name: str, file_name: str):
|
|
messageJson = {"Operation": "Download File Abort",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name
|
|
}}
|
|
self.transmitMessage(messageJson)
|
|
fileHandler = self.downloadingFiles.pop(file_name)
|
|
if fileHandler is None:
|
|
return
|
|
fileHandler.close()
|
|
abortedPath = Path(self.mainWindow.SETTINGS.value("Project/FilesDir")) / file_name
|
|
abortedPath.unlink(missing_ok=True)
|
|
|
|
def deleteFile(self, project_name: str, file_name: str):
|
|
message = {"Operation": "Delete File",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name}}
|
|
self.transmitMessage(message)
|
|
|
|
def askServerForFileSummary(self, project_name: str, document_name: str):
|
|
message = {"Operation": "Get File Summary",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'document_name': document_name}}
|
|
self.transmitMessage(message)
|
|
|
|
def receiveFileSummaryListener(self, document_name: str, summary: str):
|
|
self.receive_document_summary_signal.emit(document_name, summary)
|
|
|
|
def receiveFileUploadAbort(self, file_name: str):
|
|
"""
|
|
If we are told by the server to stop uploading a file,
|
|
we should do so (i.e. because no space left on server),
|
|
to avoid wasting bandwidth.
|
|
|
|
:param file_name:
|
|
:return:
|
|
"""
|
|
try:
|
|
uploadToAbort = self.uploadingFiles.pop(file_name)
|
|
uploadToAbort.continue_running = False
|
|
self.file_upload_abort_signal.emit(file_name)
|
|
except KeyError:
|
|
pass
|
|
|
|
def sendFileAbortAll(self, project_name: str):
|
|
"""
|
|
Abort the sending of all files currently being transmitted.
|
|
|
|
:param project_name:
|
|
:return:
|
|
"""
|
|
for file_name in self.uploadingFiles:
|
|
try:
|
|
uploadToAbort = self.uploadingFiles.pop(file_name)
|
|
uploadToAbort.continue_running = False
|
|
messageJson = {"Operation": "File Upload Abort",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name
|
|
}}
|
|
self.transmitMessage(messageJson)
|
|
except KeyError:
|
|
pass
|
|
|
|
def receiveFileAbortAll(self, project_name: str):
|
|
"""
|
|
Abort the downloading of all files currently being transmitted.
|
|
|
|
:param project_name:
|
|
:return:
|
|
"""
|
|
for file_name in self.downloadingFiles:
|
|
messageJson = {"Operation": "Download File Abort",
|
|
"Arguments": {
|
|
'project_name': project_name,
|
|
'file_name': file_name
|
|
}}
|
|
self.transmitMessage(messageJson)
|
|
fileHandler = self.downloadingFiles.pop(file_name)
|
|
if fileHandler is None:
|
|
return
|
|
fileHandler.close()
|
|
abortedPath = Path(self.mainWindow.SETTINGS.value("Project/FilesDir")) / file_name
|
|
abortedPath.unlink(missing_ok=True)
|