无法设置和检索会话变量答案

【问题标题】：unable to set and retrieve session variables无法设置和检索会话变量
【发布时间】：2017-07-21 12:07:29
【问题描述】：

使用 Django 1.10

我的中间件设置如下：

MIDDLEWARE = [
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',

'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',


'wagtail.wagtailcore.middleware.SiteMiddleware',
'wagtail.wagtailredirects.middleware.RedirectMiddleware',
]

我确保包含会话引擎

SESSION_ENGINE = 'django.contrib.sessions.backends.signed_cookies'

我的客户密码和 ID 设置如下：

os.environ['CLIENT_SECRET'] = 'something'
os.environ['CLIENT_ID'] = 'something'

我的视图被设置为做一个回调，存储会话变量如下：

def potato_oauth_callback(request):


  POTATO_OAUTH2_TOKEN_ENDPOINT = "https://login.potato.com/potatoservices/potatooauth2/potatotoken"
  POTATO_SECRET = get from env variables
  POTATO_ID = get from env variables
  POTATO_TYPE = "authorization_code"
  POTATOCALLBACK_URL = "https://potatourl/potatoes/potatocallback"

  authorization_code = request.GET.get('code')

  payload = {
    'potato_type': POTATO_TYPE,
    'potato_id': POTATO_ID,
    'potato_secret': POTATO_SECRET,
    'potato_uri': POTATOCALLBACK_URL,
    'code': potato_code
  }

  r = requests.post(POTATO_OAUTH2_TOKEN_ENDPOINT, data=potatoload)

  resp = r.json()

  potatoAccess = {
    'id': resp['id'],
    'timestamp': resp['issued_at'],
    'instanceURL': resp['instance_url'],
    'signature': resp['signature'],
    'accessToken': resp['access_token']
  }

  request.session['potatoAccess_id'] = potatoAccess['id']
  request.session['potatoAccess_timestamp'] = potatoAccess['timestamp']
  request.session['potatoAccess_instanceURL'] = potatoAccess['instanceURL']
  request.session['potatoAccess_signature'] = potatoAccess['signature']
  request.session['potatoAccess_accessToken'] = potatoAccess['accessToken']

  return HttpResponse(t.render({}, request))

随后，当我请求重新检查我的会话变量时，我不断收到关键错误并且无法检索它们：

def check_potatoes(request):
  c = {}
  c['potatoAccess_id'] = request.session['potatoAccess_id']
  print request.session['potatoAccess_id']
  return HttpResponse(json.dumps('potatoes'), content_type='application/json')

或

def check_potatoes(request):
  try:
    c = {}
    c['potatoAccess_id'] = request.session['potatoAccess_id']
    print request.session['potatoAccess_id']
    return HttpResponse(json.dumps('potatoes'), content_type='application/json')
  except Exception as potatoes:
    potatoesdata = {'message': potatoes.message}
    return HttpResponse(json.dumps(potatoesdata), content_type='application/json')

需要注意的是，当我进行初始回调时，我可以验证：

request.session['potatoAccess_id'] returns a value
potatoAccess['id'] returns a value

更改视图时（通过 ajax 调用的其他方法）我得到这些 keyErrors 就好像这些值不存在一样

【问题讨论】：

标签： python-2.7 django-views session-cookies django-1.10

【解决方案1】：

初学者的错误 - 回调是使用隧道服务 ngrok.io 为那些不熟悉它的人发送的，（所以我实际上可以有一个安全的连接）和会话的其余部分我只是在我的本地主机上进行，所以我的设置是正确，我只是不在同一个会话中，因此为什么我的变量不存在...

我的“登录”是在https://localhost:8000/login 完成的，但是，回调是通过 ngrok 完成的 "https://login.potato.com/potatoservices/potatooauth2/potatotoken"

当会话变量可从https://xxx.ngrok.io/potatourls 获得时，我继续在我的本地主机上进行测试

【讨论】：