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https://github.com/onionshare/onionshare.git
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Support handling events by monitoring an events folder for changes
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parent
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commit
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7 changed files with 152 additions and 23 deletions
89
onionshare_gui/event_handler.py
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89
onionshare_gui/event_handler.py
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# -*- coding: utf-8 -*-
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"""
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OnionShare | https://onionshare.org/
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Copyright (C) 2014-2018 Micah Lee <micah@micahflee.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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import json
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import os
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from watchdog.observers import Observer
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from watchdog.events import FileSystemEventHandler, FileModifiedEvent
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from PyQt5 import QtCore
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class EventHandler(FileSystemEventHandler, QtCore.QObject):
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"""
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To trigger an event, write a JSON line to the events file. When that file changes,
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each line will be handled as an event. Valid events are:
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{"type": "new_tab"}
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{"type": "new_share_tab", "filenames": ["file1", "file2"]}
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"""
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new_tab = QtCore.pyqtSignal()
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new_share_tab = QtCore.pyqtSignal(list)
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def __init__(self, common):
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super(EventHandler, self).__init__()
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self.common = common
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def on_modified(self, event):
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if (
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type(event) == FileModifiedEvent
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and event.src_path == self.common.gui.events_filename
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):
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# Read all the lines in the events, then delete it
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with open(self.common.gui.events_filename, "r") as f:
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lines = f.readlines()
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os.remove(self.common.gui.events_filename)
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self.common.log(
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"EventHandler", "on_modified", f"processing {len(lines)} lines"
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)
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for line in lines:
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try:
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obj = json.loads(line)
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if "type" not in obj:
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self.common.log(
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"EventHandler",
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"on_modified",
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f"event does not have a type: {obj}",
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)
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continue
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except json.decoder.JSONDecodeError:
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self.common.log(
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"EventHandler", "on_modified", f"ignoring invalid line: {line}"
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)
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continue
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if obj["type"] == "new_tab":
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self.common.log("EventHandler", "on_modified", "new_tab event")
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self.new_tab.emit()
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elif obj["type"] == "new_share_tab":
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if "filenames" in obj and type(obj["filenames"]) is list:
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self.new_share_tab.emit(obj["filenames"])
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else:
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self.common.log(
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"EventHandler",
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"on_modified",
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f"invalid new_share_tab event: {obj}",
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)
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else:
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self.common.log(
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"EventHandler", "on_modified", f"invalid event type: {obj}"
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)
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