Just for fun I want to automatically track if I go to the gym or not. Every time I go to Golds Gym I have to scan my card that I keep on my key chain so there is an electronic record of me going to the gym or not. I did not know about this when I signed up, but Golds Gym does have a crappy website for managing your membership and on there you can see a record of every time you have checked into the gym.
This works pretty well and I was able to get everything I needed from the command line using cURL commands, but unfortunatley it only worked for the lifetime of the session cookie. Even though I have worked with web technology for many years I actually haven’t done a whole lot with cookies. The copy as cURL command from Firefox will actually copy over all of the cookies into the cURL request, but that wasn’t exactly what I was after. Through some digging around I found a great resource on cURL that mentions how to save and retreive cookies from a text file.
To save a cookie you can use the
-c flag followed by the name of the cookie
file you want to save. Here is an example:
curl -c cookie.txt https://example.com?creds=asdf
If you then want to use those cookies you can use the
-b flag like this:
curl -b cookie.txt https://example.com/data
So now I can run one cURL command to authenticate with my username and password which will save a session token in my cookie file. And then I can run another cURL command using the cookie file to fetch the data I’m after. Pretty cool.
Now my next steps are to do this all in ruby. After that I’m hoping I can add this to my private Discourse instance somehow so that I can be awarded a custom gym badge every day I go or for going so many days in a row.