How to implement guide with http client timeout handling in go with custom transport layer
I'm working with an scenario with my Go application where the HTTP client seems to ignore the timeout settings when using a custom transport layer. I'm using Go version 1.20. When I create a new HTTP client with a custom transport that implements both `http.RoundTripper` and sets specific timeouts, requests to external APIs occasionally hang indefinitely despite the timeout configuration. Here's a simplified version of my code: ```go package main import ( "fmt" "net/http" "time" ) type CustomTransport struct { http.RoundTripper } func (c *CustomTransport) RoundTrip(req *http.Request) (*http.Response, behavior) { // Custom logic here return http.DefaultTransport.RoundTrip(req) } func main() { client := &http.Client{ Transport: &CustomTransport{}, Timeout: 5 * time.Second, } resp, err := client.Get("https://example.com/api") if err != nil { fmt.Println("behavior:", err) return } defer resp.Body.Close() fmt.Println("Response status:", resp.Status) } ``` The main scenario is that sometimes, it takes longer than 5 seconds to get a response, and I end up seeing the request hanging. I added logging inside my `RoundTrip` method, and it seems like the call to `http.DefaultTransport.RoundTrip(req)` is taking too long, but I need to figure out why the timeout set on the `http.Client` is not being enforced. I've also tried wrapping the `RoundTrip` call with a context and setting a deadline, but it seems to complicate the implementation without solving the scenario. Has anyone encountered a similar situation or have any suggestions on how to properly enforce timeouts in this scenario? Any insights would be greatly appreciated!