How to redirect to the original url after login in Tornado





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If i open a url required login to access, after the login was done i wish to be redirected to the original url. How can i achieve this in Tornado? I searched in Google but nothing useful found. I used the following code but it does not work.



def LoginHandler(RequestHandler):
if not self.current_user:
self.render("login.html")
else:
self.redirect(self.request.headers["Referer"])


I used the Google developer tool and find that when the url is redirected to login page the 'Referer' field does not exist in the request headers.










share|improve this question































    0















    If i open a url required login to access, after the login was done i wish to be redirected to the original url. How can i achieve this in Tornado? I searched in Google but nothing useful found. I used the following code but it does not work.



    def LoginHandler(RequestHandler):
    if not self.current_user:
    self.render("login.html")
    else:
    self.redirect(self.request.headers["Referer"])


    I used the Google developer tool and find that when the url is redirected to login page the 'Referer' field does not exist in the request headers.










    share|improve this question



























      0












      0








      0








      If i open a url required login to access, after the login was done i wish to be redirected to the original url. How can i achieve this in Tornado? I searched in Google but nothing useful found. I used the following code but it does not work.



      def LoginHandler(RequestHandler):
      if not self.current_user:
      self.render("login.html")
      else:
      self.redirect(self.request.headers["Referer"])


      I used the Google developer tool and find that when the url is redirected to login page the 'Referer' field does not exist in the request headers.










      share|improve this question
















      If i open a url required login to access, after the login was done i wish to be redirected to the original url. How can i achieve this in Tornado? I searched in Google but nothing useful found. I used the following code but it does not work.



      def LoginHandler(RequestHandler):
      if not self.current_user:
      self.render("login.html")
      else:
      self.redirect(self.request.headers["Referer"])


      I used the Google developer tool and find that when the url is redirected to login page the 'Referer' field does not exist in the request headers.







      python tornado url-redirection






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 26 '18 at 11:47









      Vadim Kotov

      4,84863549




      4,84863549










      asked Nov 22 '18 at 2:52









      Ke LuKe Lu

      367




      367
























          1 Answer
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          If you're using @web.authenticated to require login on your handlers, it will redirect the user to the login page with the current url in the next parameter.



          For example, if you request for /protected/page, and if you're not logged in, you'll be redirected to the login page with this url - /login?next=/protected/page.



          In your login handler check for the next parameter and redirect.



          self.redirect(self.get_query_argument('next', '/default/url/if/next/is/empty'))





          share|improve this answer
























          • Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

            – Ke Lu
            Nov 23 '18 at 5:59











          • I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

            – Ke Lu
            Nov 23 '18 at 6:06












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          If you're using @web.authenticated to require login on your handlers, it will redirect the user to the login page with the current url in the next parameter.



          For example, if you request for /protected/page, and if you're not logged in, you'll be redirected to the login page with this url - /login?next=/protected/page.



          In your login handler check for the next parameter and redirect.



          self.redirect(self.get_query_argument('next', '/default/url/if/next/is/empty'))





          share|improve this answer
























          • Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

            – Ke Lu
            Nov 23 '18 at 5:59











          • I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

            – Ke Lu
            Nov 23 '18 at 6:06
















          0














          If you're using @web.authenticated to require login on your handlers, it will redirect the user to the login page with the current url in the next parameter.



          For example, if you request for /protected/page, and if you're not logged in, you'll be redirected to the login page with this url - /login?next=/protected/page.



          In your login handler check for the next parameter and redirect.



          self.redirect(self.get_query_argument('next', '/default/url/if/next/is/empty'))





          share|improve this answer
























          • Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

            – Ke Lu
            Nov 23 '18 at 5:59











          • I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

            – Ke Lu
            Nov 23 '18 at 6:06














          0












          0








          0







          If you're using @web.authenticated to require login on your handlers, it will redirect the user to the login page with the current url in the next parameter.



          For example, if you request for /protected/page, and if you're not logged in, you'll be redirected to the login page with this url - /login?next=/protected/page.



          In your login handler check for the next parameter and redirect.



          self.redirect(self.get_query_argument('next', '/default/url/if/next/is/empty'))





          share|improve this answer













          If you're using @web.authenticated to require login on your handlers, it will redirect the user to the login page with the current url in the next parameter.



          For example, if you request for /protected/page, and if you're not logged in, you'll be redirected to the login page with this url - /login?next=/protected/page.



          In your login handler check for the next parameter and redirect.



          self.redirect(self.get_query_argument('next', '/default/url/if/next/is/empty'))






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 22 '18 at 7:06









          xyresxyres

          10.1k32446




          10.1k32446













          • Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

            – Ke Lu
            Nov 23 '18 at 5:59











          • I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

            – Ke Lu
            Nov 23 '18 at 6:06



















          • Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

            – Ke Lu
            Nov 23 '18 at 5:59











          • I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

            – Ke Lu
            Nov 23 '18 at 6:06

















          Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

          – Ke Lu
          Nov 23 '18 at 5:59





          Thanks for for your response. I have not use the @web.authenticated decorator but implement my own access control layer. But i finally achieve this inspired by your answer.

          – Ke Lu
          Nov 23 '18 at 5:59













          I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

          – Ke Lu
          Nov 23 '18 at 6:06





          I add a new 'next' argument to the login uri whose value is the currently request one in the redirect when a user is not logged, and write this argument to the login page when rendering and when the user is logging i send this argument along with the user password info and finally i can do the redirect using this extra argument.

          – Ke Lu
          Nov 23 '18 at 6:06




















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