GAE/Flask [Errno 13] 权限被拒绝

Question

正如标题所示，当我的烧瓶应用程序尝试运行时，我看到了这个错误。

我使用 dev_appserver 在本地托管应用程序。

当我访问该站点并尝试运行该应用程序时发生错误。似乎 GAE 出于某种原因尝试绑定套接字但失败。

我怀疑这可能与 OAuth2 有关。也许它需要 SSL 连接？

我什至不知道从哪里开始解决这个问题，因为其他关于这个问题的帖子都没有遇到同样的问题。

编辑：这是确认 GAE 服务器在不同端口上成功启动的控制台屏幕截图；还是没有解决

Traceback (most recent call last):
  File "C:\Users\XXX\AppData\Local\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\runtime\wsgi.py", line 240, in Handle
      handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "C:\Users\XXX\AppData\Local\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\runtime\wsgi.py", line 299, in _LoadHandler
      handler, path, err = LoadObject(self._handler)
  File "C:\Users\XXX\AppData\Local\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\runtime\wsgi.py", line 85, in LoadObject
      obj = __import__(path[0])
  File "C:\Users\XXX\PycharmProjects\ad-assignment\main.py", line 51, in <module>
      app.run()
  File "C:\Users\XXX\PycharmProjects\ad-assignment\lib\flask\app.py", line 843, in run
      run_simple(host, port, self, **options)
  File "C:\Users\XXX\PycharmProjects\ad-assignment\lib\werkzeug\serving.py", line 694, in run_simple
      inner()
  File "C:\Users\XXX\PycharmProjects\ad-assignment\lib\werkzeug\serving.py", line 656, in inner
      fd=fd)
  File "C:\Users\XXX\PycharmProjects\ad-assignment\lib\werkzeug\serving.py", line 550, in make_server
      passthrough_errors, ssl_context, fd=fd)
  File "C:\Users\XXX\PycharmProjects\ad-assignment\lib\werkzeug\serving.py", line 464, in __init__
      HTTPServer.__init__(self, (host, int(port)), handler)
  File "C:\Python27\Lib\SocketServer.py", line 417, in __init__
      self.server_bind()
  File "C:\Python27\Lib\BaseHTTPServer.py", line 108, in server_bind
      SocketServer.TCPServer.server_bind(self)
  File "C:\Python27\Lib\SocketServer.py", line 431, in server_bind
      self.socket.bind(self.server_address)
  File "C:\Users\XXX\AppData\Local\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\dist27\socket.py", line 222, in meth
      return getattr(self._sock,name)(*args)
  File "C:\Users\XXX\AppData\Local\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\api\remote_socket\_remote_socket.py", line 676, in bind
      raise _SystemExceptionFromAppError(e)
error: [Errno 13] Permission denied
INFO     2016-12-16 21:41:51,631 module.py:788] default: "GET /oauth2callback?code=x/xxxxxxxxxxxxxxxxx HTTP/1.1" 500 -

代码（见 Google 的OAuth2 usage guide）：

import flask


app = flask.Flask(__name__)

@app.route('/')
def index():
    ...


@app.route('/oauth2callback')
def oauth2callback():
    ...


if __name__ == 'main':
    import uuid
    app.secret_key = str(uuid.uuid4())
    app.debug = False
    app.run()

Answer 1

我们有一个tutorial that walks you through adding Firebase Authentication to your Python app running with Flask。 Firebase 身份验证是现在首选的身份工具包。当然，您仍然可以使用纯 OAuth2 流程，但 Firebase Auth 还提供多提供者身份验证，如果您正在考虑将其添加到您的应用程序中。如果您只想深入了解示例代码，请查看here on GitHub。

如果您只想坚持直接使用 OAuth，您可能需要查看 Flask 代码本身。 Getting flask to run is pretty easy on App Engine。我的猜测是你调用了一些你不需要的代码（flask.run()）或者你不是importing your library properly（见appengine_config.py）。