Convert null to empty in JSON

models/vulninfos.go

@@ -162,22 +162,29 @@ func (v VulnInfo) VendorLinks(family string) map[string]string {
 	return links
 }
 
-// TODO
 // NilToEmpty set nil slice or map fields to empty to avoid null in JSON
-//  func (v *VulnInfo) NilToEmpty() {
-//      if v.CpeNames == nil {
-//          v.CpeNames = []string{}
-//      }
-//      if v.DistroAdvisories == nil {
-//          v.DistroAdvisories = []DistroAdvisory{}
-//      }
-//      if v.PackageNames == nil {
-//          v.PackageNames = []string{}
-//      }
-//      if v.CveContents == nil {
-//          v.CveContents = NewCveContents()
-//      }
-//  }
+func (v *VulnInfo) NilToEmpty() *VulnInfo {
+	if v.CpeNames == nil {
+		v.CpeNames = []string{}
+	}
+	if v.DistroAdvisories == nil {
+		v.DistroAdvisories = []DistroAdvisory{}
+	}
+	if v.PackageNames == nil {
+		v.PackageNames = []string{}
+	}
+	if v.CveContents == nil {
+		v.CveContents = NewCveContents()
+	}
+	for key := range v.CveContents {
+		if v.CveContents[key].Cpes == nil {
+			cont := v.CveContents[key]
+			cont.Cpes = []Cpe{}
+			v.CveContents[key] = cont
+		}
+	}
+	return v
+}
 
 // DistroAdvisory has Amazon Linux, RHEL, FreeBSD Security Advisory information.
 type DistroAdvisory struct {

report/report.go

@@ -104,6 +104,11 @@ func fillCveInfo(r *models.ScanResult) error {
 	if err := fillCveInfoFromCveDB(r); err != nil {
 		return fmt.Errorf("Failed to fill CVE information: %s", err)
 	}
+
+	for cveID := range r.ScannedCves {
+		vinfo := r.ScannedCves[cveID]
+		r.ScannedCves[cveID] = *vinfo.NilToEmpty()
+	}
 	return nil
 }
 
@@ -192,8 +197,6 @@ func fillVulnByCpeNames(cpeNames []string, scannedVulns models.VulnInfos) error
 					CpeNames:   []string{name},
 					Confidence: models.CpeNameMatch,
 				}
-				//TODO
-				//  v.NilToEmpty()
 				scannedVulns[detail.CveID] = v
 			}
 		}