Ignore python3.11 cgi deprecation warning

The cgi module is marked as deprecated and will be removed in
python3.13. servefile uses the module for its FieldStorage class used in
the upload functionality. For now I will just ignore this, so servefile
doesn't print out the warning each time it is run, but soon this will
require either a rewrite of FieldStorage or an external library.

With this commit we also now officially support python3.10 and
python3.11.

.github/workflows/run-tox.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [2.7, 3.6, 3.7, 3.8, 3.9]
+        python: [2.7, 3.6, 3.7, 3.8, 3.9, "3.10", 3.11]
 
     steps:
       - uses: actions/checkout@v2

servefile/servefile.py

@@ -11,7 +11,6 @@ __version__ = '0.5.3'
 
 import argparse
 import base64
-import cgi
 import datetime
 import io
 import mimetypes
@@ -23,6 +22,7 @@ from subprocess import Popen, PIPE
 import sys
 import tempfile
 import time
+import warnings
 
 # fix imports for python2/python3
 try:
@@ -43,6 +43,11 @@ try:
 except ImportError:
     pass
 
+with warnings.catch_warnings():
+    warnings.filterwarnings("ignore", category=DeprecationWarning)
+    # scheduled for removal in python3.13, used for FieldStorage
+    import cgi
+
 
 def getDateStrNow():
     """ Get the current time formatted for HTTP header """

setup.py

@@ -42,6 +42,8 @@ setup(
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Communications',
         'Topic :: Communications :: File Sharing',
         'Topic :: Internet',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py36,py37,py38,py39,pep8
+envlist = py27,py36,py37,py38,py39,py310,py311,pep8
 
 [testenv]
 deps =