使用python和GAE检索默认的后备头像图像

Question

我的用户可以上传自己的图像并将其用作头像。现在，我正在努力如何检索默认的后备图像，如果他们自己没有上传图像。

头像的路径是“//mysite.com/avatar/username”。

到目前为止，我有这样的代码，当用户上传头像自己，但它给了我下面的错误，当我尝试检索默认图像的正常工作：

raise IOError(errno.EACCES, 'file not accessible', filename)

IOError: [Errno 13] file not accessible: '/Users/myuser/Documents/github/mysite/static/images/profile.png'

def get(self): 
    path = self.request.path.split('/') 
    action = self.get_action(path) 

    if action: 
     e = employees.filter('username = ', action).get() 

     if e.avatar: 
      self.response.headers['Content-Type'] = "image/png" 
      self.response.out.write(e.avatar) 
     else: 
      self.response.headers['Content-Type'] = 'image/png' 
      path = os.path.join(os.path.split(__file__)[0], 'static/images/profile.png') 
      with open(path, 'r') as f: 
       print self.response.out.write(f.read()) 

我已经在我的app.yaml中将“/ static”文件夹定义为static_dir。

我知道我可以将profile.png放在根文件夹中，但我更喜欢将它放在“/ static/images”文件夹中。

任何想法？

Answer 1

如果你声明的文件本身作为一个static_file或它的目录或文件路径的任何目录static_dir您的应用程序/服务的.yaml配置文件里，然后，默认情况下，它不是应用程序代码访问。您需要将其配置为application_readable。 From Handlers element：

application_readable

Optional. Boolean. By default, files declared in static file handlers are uploaded as static data and are only served to end users. They cannot be read by an application. If this field is set to true, the files are also uploaded as code data so your application can read them. Both uploads are charged against your code and static data storage resource quotas .