fileshare.py 文件源码

def downloadFile(self, treeView, path, column):
        model = treeView.get_model()
        iter = model.get_iter(path)
        filename = model.get(iter, 0)[0]
        h = hashlib.sha1()
        h.update(filename)
        key = h.digest()

        def getTargetNode(result):
            targetNodeID = result[key]
            df = self.node.findContact(targetNodeID)
            return df
        def getFile(protocol):
            if protocol != None:
                protocol.requestFile(filename, self)
        def connectToPeer(contact):
            if contact == None:
                dialog = gtk.MessageDialog(self, gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
                                        gtk.MESSAGE_ERROR, gtk.BUTTONS_OK,
                                        "File could not be retrieved.\nThe host that published this file is no longer on-line.")
                dialog.run()
                dialog.destroy()
            else:
                c = ClientCreator(twisted.internet.reactor, FileGetter)
                df = c.connectTCP(contact.address, contact.port)
                return df

        df = self.node.iterativeFindValue(key)
        df.addCallback(getTargetNode)
        df.addCallback(connectToPeer)
        df.addCallback(getFile)