python - 我可以使用 GAE + python 2.7 + django.utils.translation 吗？

Question

我使用 i18n 进行本地化，就像 django 使用自定义请求处理程序在不同语言之间切换并升级到 python 2.7 这会带来麻烦，因为它使用来自 django.utils.translation 的 cookie。在最坏的情况下，我必须从我们的自定义请求处理程序转移到可以为我们切换语言的其他系统。您知道如何解决此错误吗？ django 语言 cookie 是否仍然像以前一样可用？我的其他不依赖于 Django 的本地化替代方案是什么？通天塔？我还能使用旧的 .po 和 .mo 文件吗？我应该使用其他一些 Cookie 类吗？我的自定义请求处理程序类:

from django.utils import translation

class I18NHandler(webapp.RequestHandler):   

    def initialize(self, request, response):
        webapp.RequestHandler.initialize(self, request, response)
        self.request.COOKIES = Cookies(self)
        self.request.META = os.environ
        self.reset_language()

    def reset_language(self):

        # Decide the language from Cookies/Headers

        language = translation.get_language_from_request(self.request)
        translation.activate(language)
        self.request.LANGUAGE_CODE = translation.get_language()

        # Set headers in response

        self.response.headers['Content-Language'] = \
            translation.get_language()


class Cookies(UserDict.DictMixin):

    def __init__(self, handler, **policy):
        self.response = handler.response
        self._in = handler.request.cookies
        self.policy = policy
        if 'secure' not in policy \
            and handler.request.environ.get('HTTPS', '').lower() \
            in ['on', 'true']:
            policy['secure'] = True
        self._out = {}

    def __getitem__(self, key):
        if key in self._out:
            return self._out[key]
        if key in self._in:
            return self._in[key]
        raise KeyError(key)

    def __setitem__(self, key, item):
        self._out[key] = item
        self.set_cookie(key, item, **self.policy)

    def __contains__(self, key):
        return key in self._in or key in self._out

    def keys(self):
        return self._in.keys() + self._out.keys()

    def __delitem__(self, key):
        if key in self._out:
            del self._out[key]
            self.unset_cookie(key)
        if key in self._in:
            del self._in[key]
            p = {}
            if 'path' in self.policy:
                p['path'] = self.policy['path']
            if 'domain' in self.policy:
                p['domain'] = self.policy['domain']
            self.delete_cookie(key, **p)

    # begin WebOb functions

    def set_cookie(
        self,
        key,
        value='',
        max_age=None,
        path='/',
        domain=None,
        secure=None,
        httponly=False,
        version=None,
        comment=None,
        ):
        """
        Set (add) a cookie for the response
        """

        cookies = BaseCookie()
        cookies[key] = value
        for (var_name, var_value) in [
            ('max-age', max_age),
            ('path', path),
            ('domain', domain),
            ('secure', secure),
            ('HttpOnly', httponly),
            ('version', version),
            ('comment', comment),
            ]:
            if var_value is not None and var_value is not False:
                cookies[key][var_name] = str(var_value)
            if max_age is not None:
                cookies[key]['expires'] = max_age
        header_value = cookies[key].output(header='').lstrip()
        self.response.headers._headers.append(('Set-Cookie',
                header_value))

    def delete_cookie(
        self,
        key,
        path='/',
        domain=None,
        ):
        """
        Delete a cookie from the client.  Note that path and domain must match
        how the cookie was originally set.
        This sets the cookie to the empty string, and max_age=0 so
        that it should expire immediately.
        """

        self.set_cookie(key, '', path=path, domain=domain, max_age=0)

    def unset_cookie(self, key):
        """
        Unset a cookie with the given name (remove it from the
        response).  If there are multiple cookies (e.g., two cookies
        with the same name and different paths or domains), all such
        cookies will be deleted.
        """

        existing = self.response.headers.get_all('Set-Cookie')
        if not existing:
            raise KeyError('No cookies at all have been set')
        del self.response.headers['Set-Cookie']
        found = False
        for header in existing:
            cookies = BaseCookie()
            cookies.load(header)
            if key in cookies:
                found = True
                del cookies[key]
            header = cookies.output(header='').lstrip()
            if header:
                self.response.headers.add('Set-Cookie', header)
        if not found:
            raise KeyError('No cookie has been set with the name %r'
                           % key)

错误跟踪:

Traceback (most recent call last):
  File "/base/data/home/apps/s~montaoproject/main.354356023835363013/webapp2.py", line 545, in dispatch
    return method(*args, **kwargs)
  File "/base/data/home/apps/s~montaoproject/main.354356023835363013/i18n.py", line 781, in get
    cookie_django_language
  File "/base/data/home/apps/s~montaoproject/main.354356023835363013/util.py", line 65, in __setitem__
    self.set_cookie(key, item, **self.policy)
  File "/base/data/home/apps/s~montaoproject/main.354356023835363013/util.py", line 120, in set_cookie
    self.response.headers._headers.append(('Set-Cookie',
AttributeError: ResponseHeaders instance has no attribute '_headers'

提前感谢您的任何建议。

Answer 1

我相信这是因为 WebOb 已使用新的 Python 2.7 运行时进行了升级。

你应该使用:

res.headers.add('Set-Cookie', header_value)

正如 webob 中指出的那样 documentation

请注意，webapp 也已替换为 webapp2 .