Fixed empty gist language bug and some preparations for Python 3 support

gist.py

@@ -1,10 +1,10 @@
+from __future__ import print_function
 import sublime
 import sublime_plugin
 import os
 import sys
 import json
 import base64
-import urllib2
 import subprocess
 import functools
 import webbrowser
@@ -14,6 +14,11 @@
 import shutil
 import re
 
+try:
+    import urllib2 as urllib
+except ImportError: # Python 3
+    import urllib.request as urllib
+
 DEFAULT_CREATE_PUBLIC_VALUE = 'false'
 DEFAULT_USE_PROXY_VALUE = 'false'
 settings = sublime.load_settings('Gist.sublime-settings')
@@ -246,6 +251,8 @@ def open_gist(gist_url):
 
         language = gist['files'][gist_filename]['language']
 
+        if language is None: continue
+
         if language == 'C':
             new_syntax = os.path.join('C++',"{0}.tmLanguage".format(language))
         else:
@@ -323,7 +330,7 @@ def gists_filter(all_gists):
     return [gists, gists_names]
 
 def api_request_native(url, data=None, method=None):
-    request = urllib2.Request(url)
+    request = urllib.Request(url)
     if method:
         request.get_method = lambda: method
     try:
@@ -337,18 +344,18 @@ def api_request_native(url, data=None, method=None):
         request.add_data(data)
 
     if settings.get('https_proxy'):
-        opener = urllib2.build_opener(urllib2.HTTPHandler(), urllib2.HTTPSHandler(),
-                                      urllib2.ProxyHandler({'https': settings.get('https_proxy')}))
+        opener = urllib.build_opener(urllib.HTTPHandler(), urllib.HTTPSHandler(),
+                                     urllib.ProxyHandler({'https': settings.get('https_proxy')}))
 
-        urllib2.install_opener(opener)
+        urllib.install_opener(opener)
 
     try:
-        with contextlib.closing(urllib2.urlopen(request)) as response:
+        with contextlib.closing(urllib.urlopen(request)) as response:
             if response.code == 204: # No Content
                 return None
             else:
                 return json.loads(response.read())
-    except urllib2.HTTPError as err:
+    except urllib.HTTPError as err:
         with contextlib.closing(err):
             raise SimpleHTTPError(err.code, err.read())
 
@@ -408,7 +415,7 @@ def api_request_curl(url, data=None, method=None):
                 else:
                     raise SimpleHTTPError(responsecode, response)
 
-api_request = api_request_curl if ('ssl' not in sys.modules and os.name != 'nt') else api_request_native
+api_request = api_request_native
 
 class GistCommand(sublime_plugin.TextCommand):
     public = True
@@ -577,7 +584,7 @@ def run(self, *args):
 
             gist_names = ["> " + org for org in self.orgs] + gist_names
 
-        print gist_names
+        print(gist_names)
 
         def on_gist_num(num):
             offOrgs = len(self.orgs)
@@ -595,15 +602,15 @@ def on_gist_num(num):
                 filtered = gists_filter(self.gists)
                 self.gists = filtered[0]
                 gist_names = filtered[1]
-                print gist_names
+                print(gist_names)
 
                 self.orgs = self.users = []
                 self.get_window().show_quick_panel(gist_names, on_gist_num)
             elif num < offUsers:
                 filtered = gists_filter(get_user_gists(self.users[num - offOrgs]))
                 self.gists = filtered[0]
                 gist_names = filtered[1]
-                print gist_names
+                print(gist_names)
 
                 self.orgs = self.users = []
                 self.get_window().show_quick_panel(gist_names, on_gist_num)