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Showing posts from 2018

Setting up a HTTPS server in Python (WSGI)

The situation Setting up a HTTP server in Python is quite easy. You overload the handlers.CGIHandler class, and Bob's your uncle... You have to overload the run function, and that's about it.

def run(self, host='localhost', port=8000):# Initialize the server deamon# HTTPself._httpd = simple_server.make_server(host, port, self.__call__) print("Serving on port {0}...".format(port)) # Start the serverself._httpd.serve_forever()
Nothing to it, right?

So, you'd expect that setting up a HTTPS server would also be a piece of cake... but it isn't that straightforward. Luckily, for you, I have spent some time to make this easy as frig.

The idea is to make a SSL socket, and to do that, you have to use the wrap_socket command... but where?

Look at this line of code from the run function

self._httpd = simple_server.make_server(host, port, self.__call__)
When you open the simple_server package, you see that there's an optional server_class argument.

T…

Optimizing date calculations

I wrote a naive little algorithm to calculate the end date of a scheduled event.
There are the following restraints:

Total number of hoursNumber of hours per dayWorkdays per weekSkip holidays
So, the pseudo-code looks like this:
While there are hours
    If it's a workday
         diminish the hour counter by the amount of hours per day
    Go to the next day
This works, but it's slow. Let's do this moar better!

New pseudo-code:
Hours / Hours per day                   ===> Days
Days / Workdays per week            ===> Weeks
(7 - workdays per week) * Weeks ===> More Days  Add the number of days to the initial date to get the end date.  Calculate the number of holidays in the range ===> Days  While there are days
    If it's a workday
         diminish the day counter by one
    Move the end date on day forward. This improved algorithm is 150 times faster than the original for 630 hours, 5 hours per day (or 126 days)