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POConfirmation box on file transfer over sockets using PyQT
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copied!<p>I have a confirmation box which gets called when sending a file over the network. However, the function for the <code>Signal</code> is in the <code>MainWindow</code> class and uses variables from the <code>Worker</code> thread. But it doesn't work because the variables in the worker thread are not in the right scope.</p> <p>Any idea how I can pass the <code>msg</code> variable to the <code>saveFile</code> function in the <code>MainWindow</code> class from the signal?</p> <p><strong>Edit:</strong> What I needed to do was pass an argument to my signal but I figured it out. Sorry for the confusion. I was unsure what needed to be done.</p> <p>Here's a working example:</p> <pre><code>import socket import select import sys, os from PyQt4.QtCore import * from PyQt4.QtGui import * CMD_FILE = 1 CLIENT_PORT = 9001 CLIENT_HOST = '127.0.0.1' class MainWindow(QWidget): def __init__(self, parent=None): #super(QWidget, self).__init__(parent) super(MainWindow, self).__init__(parent) self.resize(100, 50) self.thread = Worker() self.thread.start() self.file_button = QPushButton('Send a File') self.connect(self.file_button, SIGNAL("released()"), self.sendFile) self.connect_button = QPushButton('Connect To Server') self.connect(self.connect_button, SIGNAL("released()"), self.connectToServer) self.connect(self.thread, SIGNAL('triggered(PyQt_PyObject)'), self.saveFile) self.layout = QFormLayout() self.layout.addRow(self.file_button, self.connect_button) self.setLayout(self.layout) def connectToServer(self): global s try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((str(CLIENT_HOST).strip(), CLIENT_PORT)) print "Connected to ", str(CLIENT_HOST) except: print "unable to connect" def clientAll(self, cmd, msg): #check if connnected send a message s.sendall(cmd + msg) def sendFile(self): filename=QFileDialog.getOpenFileName(self, 'Open File', '.') f = open(filename, 'rb') myFile = f.read() self.clientAll(chr(CMD_FILE), myFile) f.close() print filename, "Sent\n" def saveFile(self, msg): reply = QMessageBox.question(self, 'Message', "Are you sure you wish to download this file?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No) if reply == QMessageBox.Yes: filename = QFileDialog.getSaveFileName(self, 'Save File', '.') f = open(filename, 'wb') f.write(msg) f.close() print filename, "Recieved" else: pass class Worker(QThread): def __init__(self): QThread.__init__(self) self.exiting = False def __del__(self): self.exiting = True self.wait() def run(self): source_ip = '' #socket.gethostbyname(socket.gethostname()) PORT = 9001 ### Initialize socket server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_socket.bind((source_ip, PORT)) # server_socket.listen(5) read_list = [server_socket] ### Start receive loop while True: readable, writable, errored = select.select(read_list, [], []) for s in readable: if s is server_socket: conn, addr = s.accept() read_list.append(conn) else: msg = conn.recv(12024) if msg: cmd, msg = ord(msg[0]),msg[1:] if cmd == CMD_FILE: if not msg: break self.emit(SIGNAL('triggered(PyQt_PyObject)'), msg) else: s.close() read_list.remove(s) if __name__ == '__main__': app = QApplication(sys.argv) win = MainWindow() win.setWindowTitle('CATS!!! <3') win.show() sys.exit(app.exec_()) </code></pre>

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