fix(httploader): error handling for dail tcp

Author: cshum

imagor.go

@@ -19,7 +19,7 @@ import (
 	"time"
 )
 
-const Version = "1.2.1"
+const Version = "1.2.2"
 
 // Loader image loader interface
 type Loader interface {

loader/httploader/httploader.go

@@ -112,12 +112,11 @@ func (h *HTTPLoader) Get(r *http.Request, image string) (*imagor.Blob, error) {
 	return imagor.NewBlob(func() (io.ReadCloser, int64, error) {
 		resp, err := client.Do(req)
 		if err != nil {
-			if strings.Contains(err.Error(), "no such host") {
+			if idx := strings.Index(err.Error(), "dial tcp: "); idx > -1 {
 				err = imagor.NewError(
-					fmt.Sprintf("no such host: %s", image),
+					fmt.Sprintf("%s: %s", err.Error()[idx:], image),
 					http.StatusNotFound)
 			}
-
 			return nil, 0, err
 		}
 		body := resp.Body

loader/httploader/httploader_test.go

@@ -517,5 +517,5 @@ func TestWithInvalidHost(t *testing.T) {
 	assert.NoError(t, err)
 	b, err := blob.ReadAll()
 	assert.Empty(t, b)
-	assert.Equal(t, "imagor: 404 no such host: https://foo/bar", err.Error())
+	assert.Equal(t, 404, err.(imagor.Error).Code)
 }