xadmin下設置“use_bootswatch = True”無效的解決方案

最近使用django開發一個小網站，後臺管理系統採用xadmin，xadmin是採用源代碼的方式引入到項目中，在xadmin使用的過程中，設置“use_bootswatch = True”，企圖調出主題菜單，顯示更多主題，但是設置後卻發現無效，發現主題還是默認和bootstrap2

這裏我特意去github上找到xadmin這個項目，有跟我一樣問題的解決方法

原因：當use_bootswatch 爲True的時候，就會使用httplib2去http://bootswatch.com/api/3.json 網址獲取主題菜單項。但是使用瀏覽器打開這個網址，http會被替換成https的。httplib2訪問這個https的網址，就會報錯。

點擊進去看之後，有人提供的解決方法如下：

（有顏色部分的就是源碼有修改的地方）

解決步驟：
1.安裝requests
pip install requests

2./xadmin/plugins/themes.py 引入requests（如果少了httplib2的也要引入）
import requests

3.修改block_top_navmenu方法：

如果大家嫌麻煩，直接把我這個theme.py內容文件複製過去就行

#coding:utf-8
from __future__ import print_function
import httplib2
from django.template import loader
from django.core.cache import cache
from django.utils import six
from django.utils.translation import ugettext as _
from xadmin.sites import site
from xadmin.models import UserSettings
from xadmin.views import BaseAdminPlugin, BaseAdminView
from xadmin.util import static, json
import six
if six.PY2:
    import urllib
else:
    import urllib.parse

THEME_CACHE_KEY = 'xadmin_themes'


class ThemePlugin(BaseAdminPlugin):

    enable_themes = False
    # {'name': 'Blank Theme', 'description': '...', 'css': 'http://...', 'thumbnail': '...'}
    user_themes = None
    use_bootswatch = False
    default_theme = static('xadmin/css/themes/bootstrap-xadmin.css')
    bootstrap2_theme = static('xadmin/css/themes/bootstrap-theme.css')

    def init_request(self, *args, **kwargs):
        return self.enable_themes

    def _get_theme(self):
        if self.user:
            try:
                return UserSettings.objects.get(user=self.user, key="site-theme").value
            except Exception:
                pass
        if '_theme' in self.request.COOKIES:
            if six.PY2:
                func = urllib.unquote
            else:
                func = urllib.parse.unquote
            return func(self.request.COOKIES['_theme'])
        return self.default_theme

    def get_context(self, context):
        context['site_theme'] = self._get_theme()
        return context

    # Media
    def get_media(self, media):
        return media + self.vendor('jquery-ui-effect.js', 'xadmin.plugin.themes.js')

    # Block Views
    def block_top_navmenu(self, context, nodes):

        themes = [
            {'name': _(u"Default"), 'description': _(u"Default bootstrap theme"), 'css': self.default_theme},
            {'name': _(u"Bootstrap2"), 'description': _(u"Bootstrap 2.x theme"), 'css': self.bootstrap2_theme},
            ]
        select_css = context.get('site_theme', self.default_theme)

        if self.user_themes:
            themes.extend(self.user_themes)

        if self.use_bootswatch:
            ex_themes = cache.get(THEME_CACHE_KEY)
            if ex_themes:
                themes.extend(json.loads(ex_themes))
            else:
                ex_themes = []
                try:
                    h = httplib2.Http()
                    resp, content = h.request("https://bootswatch.com/api/3.json", 'GET', '',
                        headers={"Accept": "application/json", "User-Agent": self.request.META['HTTP_USER_AGENT']})
                    if six.PY3:
                        content = content.decode()
                    watch_themes = json.loads(content)['themes']
                    ex_themes.extend([
                        {'name': t['name'], 'description': t['description'],
                            'css': t['cssMin'], 'thumbnail': t['thumbnail']}
                        for t in watch_themes])
                except Exception as e:
                    print(e)

                cache.set(THEME_CACHE_KEY, json.dumps(ex_themes), 24 * 3600)
                themes.extend(ex_themes)

        nodes.append(loader.render_to_string('xadmin/blocks/comm.top.theme.html', {'themes': themes, 'select_css': select_css}))


site.register_plugin(ThemePlugin, BaseAdminView)

至此，大功告成，就可以成功運行了