Python 实现微信防撤回功能

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在微信上突然看到“XXX撤回一条消息”的时候，心里痒不痒？现在就教你如何实现消息防撤回的功能。不限手机型号、手机无需root，只要微信号可以登上网页版就可以了（部分不常用和新申请的账号会登不上网页版）。

环境

Centos7
python2.7
itchat

代码

# coding:utf-8
import itchat
from itchat.content import TEXT
from itchat.content import *
import sys
import time
import re
reload(sys)
sys.setdefaultencoding('utf8')
import os
msg_information = {}
face_bug = None # 针对表情包的内容
@itchat.msg_register([TEXT, PICTURE, FRIENDS, CARD, MAP, SHARING, RECORDING, ATTACHMENT, VIDEO], isFriendChat=True,
   isMpChat=True)
def handle_receive_msg(msg):
 global face_bug
 msg_time_rec = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) # 接受消息的时间
 msg_from = itchat.search_friends(userName=msg['FromUserName'])['NickName'] # 在好友列表中查询发送信息的好友昵称
 msg_time = msg['CreateTime'] # 信息发送的时间
 msg_id = msg['MsgId'] # 每条信息的id
 msg_content = None # 储存信息的内容
 msg_share_url = None # 储存分享的链接，比如分享的文章和音乐
 print msg['Type']
 print msg['MsgId']
 if msg['Type'] == 'Text' or msg['Type'] == 'Friends': # 如果发送的消息是文本或者好友推荐
 msg_content = msg['Text']
 print msg_content
 # 如果发送的消息是附件、视屏、图片、语音
 elif msg['Type'] == "Attachment" or msg['Type'] == "Video"   or msg['Type'] == 'Picture'   or msg['Type'] == 'Recording':
 msg_content = msg['FileName'] # 内容就是他们的文件名
 msg['Text'](str(msg_content)) # 下载文件
 # print msg_content
 elif msg['Type'] == 'Card': # 如果消息是推荐的名片
 msg_content = msg['RecommendInfo']['NickName'] + '的名片' # 内容就是推荐人的昵称和性别
 if msg['RecommendInfo']['Sex'] == 1:
  msg_content += '性别为男'
 else:
  msg_content += '性别为女'
 print msg_content
 elif msg['Type'] == 'Map': # 如果消息为分享的位置信息
 x, y, location = re.search(
  "<location x=\"(.*" y=\"(.*".*label=\"(.*".*", msg['OriContent']).group(1, 2, 3)
 if location is None:
  msg_content = r"纬度->" + x.__str__() + " 经度->" + y.__str__() # 内容为详细的地址
 else:
  msg_content = r"" + location
 elif msg['Type'] == 'Sharing': # 如果消息为分享的音乐或者文章，详细的内容为文章的标题或者是分享的名字
 msg_content = msg['Text']
 msg_share_url = msg['Url'] # 记录分享的url
 print msg_share_url
 face_bug = msg_content
 ##将信息存储在字典中，每一个msg_id对应一条信息
 msg_information.update(
 {
  msg_id: {
  "msg_from": msg_from, "msg_time": msg_time, "msg_time_rec": msg_time_rec,
  "msg_type": msg["Type"],
  "msg_content": msg_content, "msg_share_url": msg_share_url
  }
 }
 )
##这个是用于监听是否有friend消息撤回
@itchat.msg_register(NOTE, isFriendChat=True, isGroupChat=True, isMpChat=True)
def information(msg):
 # 这里如果这里的msg['Content']中包含消息撤回和id，就执行下面的语句
 if '撤回了一条消息' in msg['Content']:
 old_msg_id = re.search("\<msgid\>(.*", msg['Content']).group(1) # 在返回的content查找撤回的消息的id
 old_msg = msg_information.get(old_msg_id) # 得到消息
 print old_msg
 if len(old_msg_id) < 11: # 如果发送的是表情包
  itchat.send_file(face_bug, toUserName='filehelper')
 else: # 发送撤回的提示给文件助手
  msg_body = "【"    + old_msg.get('msg_from') + " 撤回了 】\n"    + old_msg.get("msg_type") + " 消息：" + "\n"    + old_msg.get('msg_time_rec') + "\n"    + r"" + old_msg.get('msg_content')
  # 如果是分享的文件被撤回了，那么就将分享的url加在msg_body中发送给文件助手
  if old_msg['msg_type'] == "Sharing":
  msg_body += "\n就是这个链接" + old_msg.get('msg_share_url')
  # 将撤回消息发送到文件助手
  itchat.send_msg(msg_body, toUserName='filehelper')
  # 有文件的话也要将文件发送回去
  if old_msg["msg_type"] == "Picture"    or old_msg["msg_type"] == "Recording"    or old_msg["msg_type"] == "Video"    or old_msg["msg_type"] == "Attachment":
  file = '@fil@%s' % (old_msg['msg_content'])
  itchat.send(msg=file, toUserName='filehelper')
  os.remove(old_msg['msg_content'])
  # 删除字典旧消息
  msg_information.pop(old_msg_id)
@itchat.msg_register([TEXT, PICTURE, FRIENDS, CARD, MAP, SHARING, RECORDING, ATTACHMENT, VIDEO], isGroupChat=True)
def handle_receive_msg(msg):
 global face_bug
 msg_time_rec = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) # 接受消息的时间
 # groupid = msg['FromUserName']
 # chatroom = itchat.search_chatrooms(userName=groupid)
 msg_Actual_from = msg['ActualNickName']
 # msg_Actual_from = msg['User']
 # msg_from = msg_Actual_from['Self']['NickName']
 msg_from = msg_Actual_from
 msg_time = msg['CreateTime'] # 信息发送的时间
 msg_id = msg['MsgId'] # 每条信息的id
 msg_content = None # 储存信息的内容
 msg_share_url = None # 储存分享的链接，比如分享的文章和音乐
 print msg['Type']
 print msg['MsgId']
 if msg['Type'] == 'Text' or msg['Type'] == 'Friends': # 如果发送的消息是文本或者好友推荐
 msg_content = msg['Text']
 print msg_content
 # 如果发送的消息是附件、视屏、图片、语音
 elif msg['Type'] == "Attachment" or msg['Type'] == "Video"   or msg['Type'] == 'Picture'   or msg['Type'] == 'Recording':
 msg_content = msg['FileName'] # 内容就是他们的文件名
 msg['Text'](str(msg_content)) # 下载文件
 # print msg_content
 elif msg['Type'] == 'Card': # 如果消息是推荐的名片
 msg_content = msg['RecommendInfo']['NickName'] + '的名片' # 内容就是推荐人的昵称和性别
 if msg['RecommendInfo']['Sex'] == 1:
  msg_content += '性别为男'
 else:
  msg_content += '性别为女'
 print msg_content
 elif msg['Type'] == 'Map': # 如果消息为分享的位置信息
 x, y, location = re.search(
  "<location x=\"(.*" y=\"(.*".*label=\"(.*".*", msg['OriContent']).group(1, 2, 3)
 if location is None:
  msg_content = r"纬度->" + x.__str__() + " 经度->" + y.__str__() # 内容为详细的地址
 else:
  msg_content = r"" + location
 elif msg['Type'] == 'Sharing': # 如果消息为分享的音乐或者文章，详细的内容为文章的标题或者是分享的名字
 msg_content = msg['Text']
 msg_share_url = msg['Url'] # 记录分享的url
 print msg_share_url
 face_bug = msg_content
 ##将信息存储在字典中，每一个msg_id对应一条信息
 msg_information.update(
 {
  msg_id: {
  "msg_from": msg_from, "msg_time": msg_time, "msg_time_rec": msg_time_rec,
  "msg_type": msg["Type"],
  "msg_content": msg_content, "msg_share_url": msg_share_url
  }
 }
 )
##这个是用于监听是否有Group消息撤回
@itchat.msg_register(NOTE, isGroupChat=True, isMpChat=True)
def information(msg):
 # 这里如果这里的msg['Content']中包含消息撤回和id，就执行下面的语句
 if '撤回了一条消息' in msg['Content']:
 old_msg_id = re.search("\<msgid\>(.*", msg['Content']).group(1) # 在返回的content查找撤回的消息的id
 old_msg = msg_information.get(old_msg_id) # 得到消息
 print old_msg
 if len(old_msg_id) < 11: # 如果发送的是表情包
  itchat.send_file(face_bug, toUserName='filehelper')
 else: # 发送撤回的提示给文件助手
  msg_body = "【"    + old_msg.get('msg_from') + " 群消息撤回提醒】\n"    + " 撤回了 " + old_msg.get("msg_type") + " 消息：" + "\n"    + old_msg.get('msg_time_rec') + "\n"    + r"" + old_msg.get('msg_content')
  # 如果是分享的文件被撤回了，那么就将分享的url加在msg_body中发送给文件助手
  if old_msg['msg_type'] == "Sharing":
  msg_body += "\n就是这个链接" + old_msg.get('msg_share_url')
  # 将撤回消息发送到文件助手
  itchat.send_msg(msg_body, toUserName='filehelper')
  # 有文件的话也要将文件发送回去
  if old_msg["msg_type"] == "Picture"    or old_msg["msg_type"] == "Recording"    or old_msg["msg_type"] == "Video"    or old_msg["msg_type"] == "Attachment":
  file = '@fil@%s' % (old_msg['msg_content'])
  itchat.send(msg=file, toUserName='filehelper')
  os.remove(old_msg['msg_content'])
  # 删除字典旧消息
  msg_information.pop(old_msg_id)
# Main (enableCmdQr = True 时，将会生成二维码图片，如 =2 时二维码乱码的话 改为1 即可
itchat.auto_login(enableCmdQR=2, hotReload=True) 
itchat.run()

如果想看懂代码的话，在有python一点基础的前提下搞懂 Python 中的装饰器概念。下面是用到itchat中主要的一段代码

def msg_register(self, msgType, isFriendChat=False, isGroupChat=False, isMpChat=False):
 ''' a decorator constructor
 return a specific decorator based on information given '''
 if not (isinstance(msgType, list) or isinstance(msgType, tuple)):
 msgType = [msgType]
 def _msg_register(fn):
 for _msgType in msgType:
  if isFriendChat:
  self.functionDict['FriendChat'][_msgType] = fn
  if isGroupChat:
  self.functionDict['GroupChat'][_msgType] = fn
  if isMpChat:
  self.functionDict['MpChat'][_msgType] = fn
  if not any((isFriendChat, isGroupChat, isMpChat)):
  self.functionDict['FriendChat'][_msgType] = fn
 return fn
 return _msg_register

运行

1.连接云服务器，安装pip