google-app-engine - 文件不可访问 : 'templates/test.html' using jinja2 templates in certain directories

Question

一个简单的 GAE 应用程序仅在一台计算机上在 self.jinja2.render_template() 上抛出以下错误，但在任何其他计算机上(包括 mac 和 pc)都没有:

ERROR    2012-02-14 21:54:04,987 webapp2.py:1528] [Errno 13] file not accessible: 'templates/test.html'
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1511, in __call__
    rv = self.handle_exception(request, response, e)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1505, in __call__
    rv = self.router.dispatch(request, response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1253, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1077, in __call__
    return handler.dispatch()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 547, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 545, in dispatch
    return method(*args, **kwargs)
  File "/Users/scott/svn/GAE_branches/sample_broken_app/handlers.py", line 21, in get
    self.render_response('test.html', **context)
  File "/Users/scott/svn/GAE_branches/sample_broken_app/handlers.py", line 14, in render_response
    rv = self.jinja2.render_template(_template, **context)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2_extras/jinja2.py", line 158, in render_template
    return self.environment.get_template(_filename).render(**context)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/environment.py", line 719, in get_template
    return self._load_template(name, self.make_globals(globals))
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/environment.py", line 693, in _load_template
    template = self.loader.load(self, name, globals)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/loaders.py", line 115, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/loaders.py", line 165, in get_source
    f = open_if_exists(filename)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/utils.py", line 224, in open_if_exists
    return open(filename, mode)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 592, in __init__
    raise IOError(errno.EACCES, 'file not accessible', filename)
IOError: [Errno 13] file not accessible: 'templates/test.html'
ERROR    2012-02-14 21:54:04,991 wsgi.py:205] 
Traceback (most recent call last):
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 193, in Handle
    result = handler(self._environ, self._StartResponse)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1519, in __call__
    response = self._internal_error(e)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1511, in __call__
    rv = self.handle_exception(request, response, e)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1505, in __call__
    rv = self.router.dispatch(request, response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1253, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 1077, in __call__
    return handler.dispatch()
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 547, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2.py", line 545, in dispatch
    return method(*args, **kwargs)
  File "/Users/scott/svn/GAE_branches/sample_broken_app/handlers.py", line 21, in get
    self.render_response('test.html', **context)
  File "/Users/scott/svn/GAE_branches/sample_broken_app/handlers.py", line 14, in render_response
    rv = self.jinja2.render_template(_template, **context)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/webapp2/webapp2_extras/jinja2.py", line 158, in render_template
    return self.environment.get_template(_filename).render(**context)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/environment.py", line 719, in get_template
    return self._load_template(name, self.make_globals(globals))
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/environment.py", line 693, in _load_template
    template = self.loader.load(self, name, globals)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/loaders.py", line 115, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/loaders.py", line 165, in get_source
    f = open_if_exists(filename)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/jinja2/jinja2/utils.py", line 224, in open_if_exists
    return open(filename, mode)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_import_hook.py", line 592, in __init__
    raise IOError(errno.EACCES, 'file not accessible', filename)
IOError: [Errno 13] file not accessible: 'templates/test.html'
INFO     2012-02-14 21:54:05,006 dev_appserver.py:2884] "GET /test HTTP/1.1" 500 -

该应用只是:

处理程序.py:

import webapp2

from webapp2_extras import jinja2

class BaseHandler(webapp2.RequestHandler):

    @webapp2.cached_property
    def jinja2(self):
        # Returns a Jinja2 renderer cached in the app registry.
        return jinja2.get_jinja2(app=self.app)

    def render_response(self, _template, **context):
        # Renders a template and writes the result to the response.
        rv = self.jinja2.render_template(_template, **context)
        self.response.write(rv)


class MyHandler(BaseHandler):
    def get(self):
        context = {'message': 'Hello, world!'}
        self.render_response('test.html', **context)

webapp2_config = {}
webapp2_config['webapp2_extras.sessions'] = {
    'secret_key': 'ef23fsdawe444',
}

application = webapp2.WSGIApplication([
    webapp2.Route(r'/test', handler=MyHandler, name='test'),

], debug=True, config=webapp2_config)

应用程序.yaml:

application: sampleapp
version: 0-01
api_version: 1
runtime: python27
threadsafe: false

builtins:
- remote_api: on

handlers:
- url: .*
  script: handlers.application

libraries:
- name: jinja2
  version: 2.6

- name: webapp2
  version: 2.3

还有一个模板目录，里面有 test.html。

现在当我从不同的目录运行应用程序时，它工作正常。

这google python group帖子给了我尝试不同目录的提示，但我不知道原始目录有什么问题，它运行的代码版本没有来自 webapp2_extras 的 jinja2。

版本信息:操作系统 X 10.6.8，GoogleAppEngineLauncher:1.6.2， python :2.7.2

我重新安装了所有东西，并在我的 .bash_profile 中将我的 PYTHONPATH 设置为“”，但这并没有改变任何东西。

注意:我确实从调试输出中删除了一些非公共(public)目录名称，但它们没有空格或任何其他内容。

其他一些人也有类似的 error ，但他们的修复是针对旧版本的。 os.path 好像有点问题

Answer 1

根文件夹和您在 app.yaml 中设置为静态目录的任何文件夹都不适用于 jinja2 FileSystemLoader

当您部署时，upload_dir 的值将进入 CDN 而不是 GAE 实例，尽管您目前在本地开发服务器中，App Engine SDK 会阻止您从您在生产环境中找不到的地方加载文件。