未在燒瓶會話中設置的密鑰

Question

我在運行Flask（一個Python模塊）中得到0會話。

現在我用的燒瓶第三方庫Flask-Session

當我連接到我的網站，我收到以下錯誤：

RuntimeError: the session is unavailable because no secret key was set. Set the secret_key on the application to something unique and secret.

下面是我的服務器代碼。

from flask import Flask, session 
from flask.ext.session import Session 

SESSION_TYPE = 'memcache' 

app = Flask(__name__) 
sess = Session() 

nextId = 0 

def verifySessionId(): 
    global nextId 

    if not 'userId' in session: 
     session['userId'] = nextId 
     nextId += 1 
     sessionId = session['userId'] 
     print ("set userid[" + str(session['userId']) + "]") 
    else: 
     print ("using already set userid[" + str(session['userId']) + "]") 
    sessionId = session.get('userId', None) 
    return sessionId 

@app.route("/") 
def hello(): 
    userId = verifySessionId() 
    print("User id[" + str(userId) + "]") 
    return str(userId) 

if __name__ == "__main__": 
    app.secret_key = 'super secret key' 

    sess.init_app(app) 

    app.debug = True 
    app.run() 

正如你所看到的，我確實設置了應用密鑰。我究竟做錯了什麼？

是否有其他會話選項？

其他信息： 對Linux Mint的運行的Python 2.7

完全貼：

Traceback (most recent call last): 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__ 
    return self.wsgi_app(environ, start_response) 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app 
    response = self.make_response(self.handle_exception(e)) 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception 
    reraise(exc_type, exc_value, tb) 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app 
    response = self.full_dispatch_request() 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request 
    rv = self.handle_user_exception(e) 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception 
    reraise(exc_type, exc_value, tb) 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request 
    rv = self.dispatch_request() 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request 
    return self.view_functions[rule.endpoint](**req.view_args) 
    File "/home/sean/code/misc/session/sessiontest.py", line 27, in hello 
    userId = verifySessionId() 
    File "/home/sean/code/misc/session/sessiontest.py", line 16, in verifySessionId 
    session['userId'] = nextId 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/werkzeug/local.py", line 341, in __setitem__ 
    self._get_current_object()[key] = value 
    File "/home/sean/code/misc/hangman/venv/lib/python2.7/site-packages/flask/sessions.py", line 126, in _fail 
    raise RuntimeError('the session is unavailable because no secret ' 
RuntimeError: the session is unavailable because no secret key was set. Set the secret_key on the application to something unique and secret. 

Answer 1

唯一的例外是由NullSessionInterface會話實現，這是默認會話類型當您使用瓶上調-session。這是因爲你實際上沒有給配置SESSION_TYPE Flask;這是不夠將其設置爲您的模塊中的全局。

這個默認值對Flask 0.10沒有多大意義;它可能對Flask 0.8或0.9有意義，但當前版本被用作錯誤信號。在你的情況下，它現在給你錯誤的錯誤信息。

將SESSION_TYPE配置選項設置爲其他值。選擇redis,memcached,filesystem或mongodb之一。

將其設置爲filesystem是最簡單的;有足夠的默認配置那裏有沒有額外的依賴項工作：

if __name__ == "__main__": 
    app.secret_key = 'super secret key' 
    app.config['SESSION_TYPE'] = 'filesystem' 

    sess.init_app(app) 

    app.debug = True 
    app.run() 

Answer 2

試試這個：

app = Flask(__name__) 
app.config['SESSION_TYPE'] = 'memcached' 
app.config['SECRET_KEY'] = 'super secret key' 
sess = Session() 

，並在底部刪除您app.secret_key分配。

Answer 3

設置if __name__ == '__main__':

app.py的祕密密鑰外：

from flask import Flask, session 

app = Flask(__name__) 
app.secret_key = "super secret key" 

@app.route("/") 
... 

if __name__ == '__main__': 
    app.debug = True 
    app.run() 

如果使用flask run來運行你的應用，而python app.py__name__ != '__main__'。