Google App Engine 留言簿应用程序出现错误

Question

我上传了 Google App Engine 应用程序，网址为 developers.google.com/appengine/docs/python/memcache/usingmemcache#Memcache

当我在 Google App Engine Launcher 上运行应用程序时，它会运行，但网站显示： （第一个错误是我们没有 Python “PIL” 模块，但我没有使用图像。您能否建议导致错误的原因？

*** Running dev_appserver with the following flags:
    --skip_sdk_update_check=yes --port=13080 --admin_port=8005
Python command: /usr/bin/python2.7
INFO     2014-01-17 20:43:22,217 devappserver2.py:660] Skipping SDK update check.
WARNING  2014-01-17 20:43:22,222 api_server.py:331] Could not initialize images API; you are likely missing the Python "PIL" module.
INFO     2014-01-17 20:43:22,226 api_server.py:138] Starting API server at: localhost:55385
INFO     2014-01-17 20:43:22,230 dispatcher.py:171] Starting module "default" running at: localhost:13080
INFO     2014-01-17 20:43:22,238 admin_server.py:117] Starting admin server at: localhost:8005
ERROR    2014-01-17 20:43:24,601 wsgi.py:262] 
Traceback (most recent call last):
  File "/Users/Desktop/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 239, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/Users/Desktop/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 301, in _LoadHandler
    raise err
ImportError: <module 'guestbookw2' from '/Users/guestbookw2/guestbookw2.pyc'> has no attribute application
INFO     2014-01-17 20:43:24,607 module.py:617] default: "GET / HTTP/1.1" 500 -
ERROR    2014-01-17 20:43:24,727 wsgi.py:262] 
Traceback (most recent call last):
  File "/Users/Desktop/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 239, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/Users/Desktop/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/runtime/wsgi.py", line 301, in _LoadHandler
    raise err
ImportError: <module 'guestbookw12' from '/Users/guestbookw2/guestbookw2.pyc'> has no attribute application
INFO     2014-01-17 20:43:24,732 module.py:617] default: "GET /favicon.ico HTTP/1.1" 500 -

Answer 1

确保您上传应用程序的路径中有以下文件：

1. index.yaml（自动生成；此时您无需在此处添加或更改任何内容）。

2. favicon.ico（格式正确；如果我没记错的话应该是 16x16 或 32x32 像素）。

3. ma​​in.py（映射您网站中的所有路径；示例如下）：

   from webapp2 import WSGIApplication
   from Server import MainRequestHandler
   from Server import SomeRequestHandler
   from Server import OtherRequestHandler
   
   app = WSGIApplication([
       ('/'              ,MainRequestHandler),
       ('/abc'           ,SomeRequestHandler),
       ('/def'           ,SomeRequestHandler),
       ('/xyz'           ,OtherRequestHandler),
   ])
   

4. app.yaml（内容如下；在需要设置值的地方使用<...>）：

   application: <the app-id you chose when use signed in for GAE>
   version: 1
   runtime: python27
   api_version: 1
   threadsafe: yes
   
   handlers:
   - url: /favicon\.ico
     static_files: favicon.ico
     upload: favicon\.ico
   
   - url: .*
     script: main.app
   
   libraries:
   - name: webapp2
     version: "2.5.1" // you might need to change this as well
   

注意：

如果您希望避免处理“favicon.ico”请求，则必须删除文件“app.yaml”中的引用。

补充：

您将需要实现在“main.py”中导入的所有请求处理程序。

在上面的示例中，“main.py”希望在名为“Server”的 Python 模块中找到它们。

每个请求处理程序都必须继承 class RequestHandler，从 webapp2 导入。

补充 #2：

为了解决“PIL”问题（如果内存正常，也会出现类似问题），只需安装它。

在 Windows 命令行中，输入：pip install pil。