Merge pull request #31 from etherlabsio:feat/add-client-response-chec…

…kers

add; http client utility functions

httputil/client.go

@@ -0,0 +1,34 @@
+package httputil
+
+import (
+	"net/http"
+
+	"github.com/etherlabsio/errors"
+)
+
+// CheckResponse checks the API response for errors, and returns them if
+// present. A response is considered an error if it has a status code outside
+// the 200 range or equal to 202 Accepted.
+// API error responses are expected to have either no response
+// body, or a JSON response body that maps to ErrorResponse. Any other
+// response body will be silently ignored.
+//
+// The error type will be *TwoFactorAuthError for two-factor authentication errors.
+func CheckResponse(r *http.Response) error {
+	success := func(statusCode int) bool {
+		return 200 <= statusCode && statusCode < 500
+	}(r.StatusCode)
+	if success {
+		return nil
+	}
+	return errors.New("internal server error with http status: "+r.Status, errors.Internal)
+}
+
+// CheckOKResponse checks if the status code is within 2XX range
+func CheckOKResponse(r *http.Response) error {
+	isOK := r.StatusCode >= 200 && r.StatusCode <= 299
+	if !isOK {
+		return errors.New("response error with http status: "+r.Status, errors.Internal)
+	}
+	return nil
+}