replaced mimetypes with libmagic to prevent 'TypeError: must be str, not NoneType'

Author: alecdwm

README.md

@@ -10,6 +10,7 @@ telegramircd uses [telethon-sync](https://github.com/LonamiWebs/Telethon) to com
 
 - `git clone https://github.com/MaskRay/telegramircd && cd telegramircd`
 - python >= 3.5
+- libmagic
 - `pip3 install -r requirements.txt`
 
 Create a Telegram App.

README.zhs.md

@@ -8,6 +8,7 @@ telegramircd使用[Telethon](https://github.com/LonamiWebs/Telethon)和Telegram
 
 - `git clone https://github.com/MaskRay/telegramircd && cd telegramircd`
 - python >= 3.5
+- libmagic
 - `pip3 install -r requirements.txt`
 
 创建一个Telegram App。

requirements.txt

@@ -1,4 +1,5 @@
 aiohttp
+python-magic
 ipdb
 ipython
 configargparse

telegramircd.py

@@ -14,7 +14,7 @@
 import telethon.tl.functions.contacts
 import telethon.tl.functions.messages
 
-import aiohttp.web, asyncio, base64, inspect, json, logging.handlers, mimetypes, os, pprint, random, re, \
+import aiohttp.web, asyncio, base64, inspect, json, logging.handlers, magic, os, pprint, random, re, \
     shlex, signal, socket, ssl, string, sys, tempfile, time, traceback, uuid, weakref
 
 logger = logging.getLogger('telegramircd')
@@ -95,7 +95,7 @@ async def handle_media(self, typ, request):
                     except:
                         pass
                 if mime is None:
-                    mime = mimetypes.guess_type(filename)[0]
+                    mime = magic.from_file(filename, mime=True)
                 return aiohttp.web.Response(body=f.read(), headers={'Content-Type': mime})
         except Exception as ex:
             return aiohttp.web.Response(status=500, text=str(ex))