check if exporter has labels (fix #27) (#30)

cryptobioz · web-flow · commit b1f194ca96b4 · 2018-10-30T16:14:56.000+01:00
diff --git a/main.go b/main.go
@@ -193,10 +193,11 @@ func extractTargets(targets interface{}) (t []Exporter, err error) {
 					URL:    a["url"].(string),
 					Labels: make(map[string]string),
 				}
-				for lk, lv := range a["labels"].(map[string]interface{}) {
-					t[i].Labels[lk] = lv.(string)
+				if a["labels"] != nil {
+					for lk, lv := range a["labels"].(map[string]interface{}) {
+						t[i].Labels[lk] = lv.(string)
+					}
 				}
-
 			}
 		}
 	default:

Original file line number	Diff line number	Diff line change
`@@ -193,10 +193,11 @@ func extractTargets(targets interface{}) (t []Exporter, err error) {`
`193`	`193`	`URL: a["url"].(string),`
`194`	`194`	`Labels: make(map[string]string),`
`195`	`195`	`}`
`196`		`- for lk, lv := range a["labels"].(map[string]interface{}) {`
`197`		`- t[i].Labels[lk] = lv.(string)`
	`196`	`+ if a["labels"] != nil {`
	`197`	`+ for lk, lv := range a["labels"].(map[string]interface{}) {`
	`198`	`+ t[i].Labels[lk] = lv.(string)`
	`199`	`+ }`
`198`	`200`	`}`
`199`		`-`
`200`	`201`	`}`
`201`	`202`	`}`
`202`	`203`	`default:`