Return HTTPError from Send

client/client.go

@@ -3,7 +3,6 @@ package client
 import (
 	"bytes"
 	"encoding/json"
-	"fmt"
 	"io"
 	"net/http"
 )
@@ -47,7 +46,7 @@ func (c *BaseClient) Send(req *http.Request, v interface{}) error {
 	defer resp.Body.Close()
 
 	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		return fmt.Errorf("%d", resp.StatusCode)
+		return httpError(req, resp)
 	}
 
 	if v != nil {

client/error.go

@@ -0,0 +1,24 @@
+package client
+
+import (
+	"fmt"
+	"net/http"
+)
+
+type HTTPError struct {
+	status     string
+	StatusCode int
+	url        string
+}
+
+func httpError(req *http.Request, resp *http.Response) error {
+	return &HTTPError{
+		status:     resp.Status,
+		StatusCode: resp.StatusCode,
+		url:        req.URL.String(),
+	}
+}
+
+func (e *HTTPError) Error() string {
+	return fmt.Sprintf("%s: %s", e.url, e.status)
+}