wrap errs for easier read

broker/ntgvision.go

@@ -93,7 +93,7 @@ func (ntgJob *ntgVisionJob) JobInfo() (ntgVisionJobInfo, error) {
 	key := fmt.Sprintf("ntg_job_info_%v", ntgJob.ID)
 	if b, err := db.Get(key); err != nil {
 	} else if err := json.Unmarshal(b, &ntgJob.jobinfo); err == nil {
-		return ntgJob.jobinfo, nil
+		return ntgJob.jobinfo, fmt.Errorf("failed to parse ntg job info from db: %w: %s", err, b)
 	}
 	ntg := NewNTGVision()
 	ji, err := ntg.SearchJob(ntgJob.ID)
@@ -175,8 +175,15 @@ func (ntg NTGVision) SearchJob(id int64) (ntgVisionJobInfo, error) {
 		return ntgVisionJobInfo{}, err
 	}
 	defer rc.Close()
+	b, err := ioutil.ReadAll(rc)
+	if err != nil {
+		return ntgVisionJobInfo{}, fmt.Errorf("failed to readall search job result: %w", err)
+	}
 	var result ntgVisionJobInfo
-	err = json.NewDecoder(rc).Decode(&result)
+	err = json.Unmarshal(b, &result)
+	if err != nil {
+		err = fmt.Errorf("failed to parse job info: %w: %s", err, b)
+	}
 	return result, err
 }