feat: add ErrCBOpenState and ErrCBTooManyRequests

cliex.go

@@ -128,9 +128,18 @@ func (c *HTTP) Request(ctx context.Context, url string, opts RequestOpts) (*rest
 		cb = gobreaker.NewCircuitBreaker[*resty.Response](c.cbCfg)
 		c.cbs.Set(url, cb)
 	}
-	return cb.Execute(func() (*resty.Response, error) {
+	resp, err := cb.Execute(func() (*resty.Response, error) {
 		return c.request(ctx, url, opts)
 	})
+	switch {
+	case errors.Is(err, gobreaker.ErrOpenState):
+		return nil, ErrCBOpenState
+	case errors.Is(err, gobreaker.ErrTooManyRequests):
+		return nil, ErrCBTooManyRequests
+	case err != nil:
+		return nil, err
+	}
+	return resp, nil
 }
 
 func (c *HTTP) request(ctx context.Context, url string, opts RequestOpts) (*resty.Response, error) {

types.go

@@ -4,6 +4,8 @@ import (
 	"errors"
 	"net/http"
 	"time"
+
+	"github.com/sony/gobreaker/v2"
 )
 
 // ServerErrorResponse is the error response from server (try to guess what it is)
@@ -89,6 +91,13 @@ type RequestOpts struct {
 	EnableTrace bool
 }
 
+var (
+	// ErrCBOpenState is returned when the CB state is open
+	ErrCBOpenState = gobreaker.ErrOpenState
+	// ErrTooManyRequests is returned when the CB state is half open and the requests count is over the cb maxRequests
+	ErrCBTooManyRequests = gobreaker.ErrTooManyRequests
+)
+
 var (
 	// ErrBadRequest is when the server cannot or will not process the request due to a client error
 	// (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing).