Request Cancellation

Every week in my Tuesday Lunch & Learn livestream, we choose a useful software development skill, define a challenge related to that skill, and solve the challenge live. This week, we’re cancelling network requests.

In past episodes, we built a small command-line application that uses a microservice to encode text. We put a lot of effort into error handling, including making sure that the client times out if the microservice doesn’t respond.

There’s a catch, though: although the client times out and displays an error, it doesn’t actually cancel the request, so the application doesn’t exit. In today’s episode, we fix that problem.

[CrapE_DM]

Personally, I would have wrapped the promise so that it has the cancellation function on itself. Then the return type needn't have changed and bubbled up.