xeoncross / retryrequest

Go: Retry HTTP requests when server times out or sends 500 errors

Retry Request (Go)

Simple package to retry http.Client requests when:

• Status code is invalid/missing
• Status code is 500 range (except 501)
• Connection timeout reached

This package respects the request context.Context. Requests will not retry if context has been canceled or DeadlineExceeded is reached.

This package mostly is a drop-in replacement to help with the common net.Error.Timeout() when calling TCP, API endpoints.

Usage:

Normal requests are performed the following way:

resp, err := client.Do(req)

To use this library simply call retryrequest.Do instead:

resp, err := retryrequest.Do(client, req, nil)

The third argument is the optional retry policy:

var DefaultPolicy = &Policy{
	Retry500Status:     true,
	RetryInvalidStatus: true,
	Attempts:           2,
	Delay:              time.Millisecond * 500,
}

---

Recommendation: use github.com/hashicorp/go-retryablehttp for more types of retry scenarios.

hashicorp/go-retryablehttp is too heavy of a wrapper for me (though it provides more features). This is a lightweight wrapper that is intended to be used to repeat the same request X times for endpoints that are often overloaded. hashicorp/go-retryablehttp also provides it's own internal pool of github.com/hashicorp/go-cleanhttp clients by default.