Decorators with arguments with Flask

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I'm trying to create a decorator with arguments and use it in conjunction with the flask module.



def ios_network_access(arg): #TODO: 
def real_ios_network_access_decorator(fn):
def ios_network_access_inner():
if not request.json:
print("aborting because not json", fn.__name__)
abort(400)
try:
print("check args", arg)
return fn()
except Exception as e:
print("the following error occurred in:", fn.__name__)
print(request.json)
print(str(e))
print("---------------------------------")
abort(503)
return real_ios_network_access_decorator
@app.route("/someurl")
@ios_network_access("some argument")
def some_function_for_url():
pass


However, because flask uses function names in their decorator (flask requires uniqueness of function names and the decorator masks it), my end-points are not being created.



There is a very similar question here that asks regarding non-parameterized decorators; however, due to the additional function layer, this question is different. See AssertionError: View function mapping is overwriting an existing endpoint function: main



Any thoughts on how to pass an argument into a decorator given flask's qwerks?










share|improve this question





























    0















    I'm trying to create a decorator with arguments and use it in conjunction with the flask module.



    def ios_network_access(arg): #TODO: 
    def real_ios_network_access_decorator(fn):
    def ios_network_access_inner():
    if not request.json:
    print("aborting because not json", fn.__name__)
    abort(400)
    try:
    print("check args", arg)
    return fn()
    except Exception as e:
    print("the following error occurred in:", fn.__name__)
    print(request.json)
    print(str(e))
    print("---------------------------------")
    abort(503)
    return real_ios_network_access_decorator
    @app.route("/someurl")
    @ios_network_access("some argument")
    def some_function_for_url():
    pass


    However, because flask uses function names in their decorator (flask requires uniqueness of function names and the decorator masks it), my end-points are not being created.



    There is a very similar question here that asks regarding non-parameterized decorators; however, due to the additional function layer, this question is different. See AssertionError: View function mapping is overwriting an existing endpoint function: main



    Any thoughts on how to pass an argument into a decorator given flask's qwerks?










    share|improve this question

























      0












      0








      0








      I'm trying to create a decorator with arguments and use it in conjunction with the flask module.



      def ios_network_access(arg): #TODO: 
      def real_ios_network_access_decorator(fn):
      def ios_network_access_inner():
      if not request.json:
      print("aborting because not json", fn.__name__)
      abort(400)
      try:
      print("check args", arg)
      return fn()
      except Exception as e:
      print("the following error occurred in:", fn.__name__)
      print(request.json)
      print(str(e))
      print("---------------------------------")
      abort(503)
      return real_ios_network_access_decorator
      @app.route("/someurl")
      @ios_network_access("some argument")
      def some_function_for_url():
      pass


      However, because flask uses function names in their decorator (flask requires uniqueness of function names and the decorator masks it), my end-points are not being created.



      There is a very similar question here that asks regarding non-parameterized decorators; however, due to the additional function layer, this question is different. See AssertionError: View function mapping is overwriting an existing endpoint function: main



      Any thoughts on how to pass an argument into a decorator given flask's qwerks?










      share|improve this question














      I'm trying to create a decorator with arguments and use it in conjunction with the flask module.



      def ios_network_access(arg): #TODO: 
      def real_ios_network_access_decorator(fn):
      def ios_network_access_inner():
      if not request.json:
      print("aborting because not json", fn.__name__)
      abort(400)
      try:
      print("check args", arg)
      return fn()
      except Exception as e:
      print("the following error occurred in:", fn.__name__)
      print(request.json)
      print(str(e))
      print("---------------------------------")
      abort(503)
      return real_ios_network_access_decorator
      @app.route("/someurl")
      @ios_network_access("some argument")
      def some_function_for_url():
      pass


      However, because flask uses function names in their decorator (flask requires uniqueness of function names and the decorator masks it), my end-points are not being created.



      There is a very similar question here that asks regarding non-parameterized decorators; however, due to the additional function layer, this question is different. See AssertionError: View function mapping is overwriting an existing endpoint function: main



      Any thoughts on how to pass an argument into a decorator given flask's qwerks?







      python flask decorator python-decorators






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 4 at 2:42









      mattsapmattsap

      3,4581728




      3,4581728
























          1 Answer
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          oldest

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          1














          wraps function is a convenience way to wrap your decorator function.
          Attributes of the wrapper function are updated with the corresponding attributes from the original function.



          from functools import wraps

          def ios_network_access(arg):
          def real_ios_network_access_decorator(fn):
          @wraps(fn)
          def ios_network_access_inner(*args, **kwds):
          if not request.json:
          print("aborting because not json", fn.__name__)
          abort(400)
          try:
          print("check args", arg)
          return fn(*args, **kwds)
          except Exception as e:
          print("the following error occurred in:", fn.__name__)
          print(request.json)
          print(str(e))
          print("---------------------------------")
          abort(503)
          return ios_network_access_inner
          return real_ios_network_access_decorator





          share|improve this answer


























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            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            1














            wraps function is a convenience way to wrap your decorator function.
            Attributes of the wrapper function are updated with the corresponding attributes from the original function.



            from functools import wraps

            def ios_network_access(arg):
            def real_ios_network_access_decorator(fn):
            @wraps(fn)
            def ios_network_access_inner(*args, **kwds):
            if not request.json:
            print("aborting because not json", fn.__name__)
            abort(400)
            try:
            print("check args", arg)
            return fn(*args, **kwds)
            except Exception as e:
            print("the following error occurred in:", fn.__name__)
            print(request.json)
            print(str(e))
            print("---------------------------------")
            abort(503)
            return ios_network_access_inner
            return real_ios_network_access_decorator





            share|improve this answer






























              1














              wraps function is a convenience way to wrap your decorator function.
              Attributes of the wrapper function are updated with the corresponding attributes from the original function.



              from functools import wraps

              def ios_network_access(arg):
              def real_ios_network_access_decorator(fn):
              @wraps(fn)
              def ios_network_access_inner(*args, **kwds):
              if not request.json:
              print("aborting because not json", fn.__name__)
              abort(400)
              try:
              print("check args", arg)
              return fn(*args, **kwds)
              except Exception as e:
              print("the following error occurred in:", fn.__name__)
              print(request.json)
              print(str(e))
              print("---------------------------------")
              abort(503)
              return ios_network_access_inner
              return real_ios_network_access_decorator





              share|improve this answer




























                1












                1








                1







                wraps function is a convenience way to wrap your decorator function.
                Attributes of the wrapper function are updated with the corresponding attributes from the original function.



                from functools import wraps

                def ios_network_access(arg):
                def real_ios_network_access_decorator(fn):
                @wraps(fn)
                def ios_network_access_inner(*args, **kwds):
                if not request.json:
                print("aborting because not json", fn.__name__)
                abort(400)
                try:
                print("check args", arg)
                return fn(*args, **kwds)
                except Exception as e:
                print("the following error occurred in:", fn.__name__)
                print(request.json)
                print(str(e))
                print("---------------------------------")
                abort(503)
                return ios_network_access_inner
                return real_ios_network_access_decorator





                share|improve this answer















                wraps function is a convenience way to wrap your decorator function.
                Attributes of the wrapper function are updated with the corresponding attributes from the original function.



                from functools import wraps

                def ios_network_access(arg):
                def real_ios_network_access_decorator(fn):
                @wraps(fn)
                def ios_network_access_inner(*args, **kwds):
                if not request.json:
                print("aborting because not json", fn.__name__)
                abort(400)
                try:
                print("check args", arg)
                return fn(*args, **kwds)
                except Exception as e:
                print("the following error occurred in:", fn.__name__)
                print(request.json)
                print(str(e))
                print("---------------------------------")
                abort(503)
                return ios_network_access_inner
                return real_ios_network_access_decorator






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Jan 4 at 3:46

























                answered Jan 4 at 3:05









                ling7334ling7334

                359211




                359211
































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