How do I handle errors using the context package in Go?

How do I handle errors using the context package in Go?

In Go, the context package is primarily used for managing deadlines, cancellation signals, and carrying request-scoped values. For error handling, you can use the context to propagate errors through your application.

Can you give me an example of how to implement this?

Sure! You can create a context with a timeout and check for errors like this:

ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()

err := doSomething(ctx)
if err != nil {
    log.Println("Error occurred:", err)
}

What if the operation takes longer than the timeout?

If the operation exceeds the timeout, the context will be canceled, and you can check for the context's error using ctx.Err(). This will help you determine if the error was due to a timeout.

Are there best practices for using context in Go?

Yes, some best practices include: always pass context as the first argument, avoid storing context in global variables, and use context for request-scoped data.