Port manager for developing multiple local web apps.
When you’re building several web apps simultaneously (an increasingly common situation with microservices) it’s annoying to try and remember which app is on which port. plut (port lookup table) does it for you.
pip install plut
plut maps names to ports. You supply a name and get back the port it’s mapped to.
Imagine you have a web app with two microservices responsible for authentication and the user dashboard. Each of these services needs to know what port to bind to when it starts up, and what port the other is on, so they can talk. In this case, you might code-name these services auth and dashboard respectively. Inside the authentication service, you’d say:
import plut port = plut.port('userauth') run_webserver(port=port)
Now imagine the authentication service exposes an API. Inside the dashboard service you could say:
import plut base_url = 'http://localhost:%d/api/v1' % plut.port('userauth') # use requests or something to send requests to base_url
- plut.port(name) returns the port that name maps to. The same port will be returned for each name, user-wide.
- plut.services() returns a dict mapping names to ports.
- plut shows all names and ports.
- plut <name> shows the port of a name. This prints out a single integer, so you can use its output as a command-line argument for another program.
- plut rm <name> removes a port. (There’s no programmatic API for this at the moment. Should I add it? I’m a bit lazy.)
plut saves everything to ~/.plutfile. If you delete this you’ll lose (or voluntarily reset) your mappings.
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